Day 1 Mon, March 13, 2023最新文献

{"title":"Elevating Drilling Performance & Efficiency to Highest Levels in Field A–Journey from 150 to 31 Drilling Days.","authors":"S. Ullah, Muhammad Sajjad Ashraf, Ali Mohiuddin Ahmed, Daniyal Ahmad, Mohammad Murad Haider, Mohammad Mohsin Usmani, Syed Dost Ali","doi":"10.2118/214015-ms","DOIUrl":"https://doi.org/10.2118/214015-ms","url":null,"abstract":"\u0000 Field A is one of the most challenging fields in the Potowar region of Northern Pakistan with severe problems of fluid loss, high-pressure shallow water influx, low drillability, clay reactivity/ shale instability and depleted reservoir sections. This paper gives a brief overview of the methods and changes made along with results achieved, enabling the well to reach total depth in just 31 days compared to an average of 150 days taken on offset wells.\u0000 Due to severe drilling challenges, the wells were drilled in six-hole sections starting with 36\" surface hole. An entirely new well engineering strategy has been utilized to enhance the drilling performance in the last five wells drilled in the field. Some of the major areas of change include Customized bit design, BHA and hydraulics design, casing design optimization and change in casing seat strategy as well as novel changes in drilling fluid design and selection of Loss Control Material.\u0000 Dysfunctions and limiters in drilling which were affecting the hole cleaning, mechanical specific energy (MSE), hydraulics efficiency, and ROP were eliminated.\u0000 A detailed analysis of the impact of changes in bits and bottom hole assembly design, drilling fluids design, and casing design is shared in the study for the last fifteen wells drilled in the field. Continuous learning and enhancements in all the subject areas are analyzed with respect to the use of different strategies and technologies. An analysis has been performed for non-productive time, its root cause and successful actions taken to reduce its occurrence. A huge reduction in drilling time, cost and risks have been achieved as a result of mentioned changes in the latest well setting a benchmark in the entire region. Dry hole time for the last well has been reduced by 78 %, while 65% cost reduction is achieved as compared to the previous average time and cost respectively. After removing the dysfunctions / limiters; ROP enhancement of 5 to 10 times has been achieved in different hole sections.\u0000 The learning and experience from the use of discussed technologies and drilling practices can be helpful for optimizing challenging wells with the problems of pressure reversals, drilling fluids losses, well control, drillability issues in gumbo clay/ shales and wellbore stability.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"131 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133587594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Probabilistic Method to Populate Petrophysical Groups on Routine Core Analysis Data from Mercury Injection Capillary Pressure Domain","authors":"R. Celma, A. Lavenu","doi":"10.2118/214069-ms","DOIUrl":"https://doi.org/10.2118/214069-ms","url":null,"abstract":"\u0000 Analyzing capillary pressure (Pc) is one of the most common methods to create petrophysical groups in carbonates, since the Pc explains the moment when the fluid starts moving in the porous media, how easy or hard is the displacement of the fluid and when there is no further displacement (irreducible saturation of the porous media).\u0000 In comparison to routine core analysis (RCA) data, MICP dataset is rather small. However, utilizing all the spectrum of data is critical, more specifically in highly heterogeneous carbonates, hence the need to populate petrophysical groups from MICP to RCA space.\u0000 To determine the petrophysical groups from the MICP the following parameters were used: entry pressure, normalized porosity, permeability, rock quality index, and the hyperbolic tangent of each to the MICP samples. The petrophysical groups generated by this method give a very discrete clustering where the ranges of porosity and permeability are well defined. For distributing petrophysical groups from the MICP domain into the RCA domain, a Bayesian Inference approach in the porosity permeability space was used. Porosity and permeability standard deviation and mean for each of the petrophysical groups, were used to build a probability density functions (PDF) which will be taken as our probable scenario to feed the Bayesian Algorithm.\u0000 The results from 350 MICP samples show that we could establish a reliable petrophysical groups distribution over 7000 RCA samples. In a second stage, petrophysical groups populated in the RCA space were used to train our logs and create a continuous curve of petrophysical groups that will support the property distribution in our 3D model.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133438971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Holistic View for the Role of Digitalization of Corrosion Management and Monitoring Systems for Integrity Optimization","authors":"Moustafa Mahmoud Fahmy","doi":"10.2118/213979-ms","DOIUrl":"https://doi.org/10.2118/213979-ms","url":null,"abstract":"\u0000 Corrosion Management (CM) along with Risk Based Inspection (RBI) are inseparable elements of an Integrity Management System (IMS). Digital integration of CM and RBI is vital for the optimization of an IMS. Several market available software programs are developed to deliver this integration by interlinking the modules in a digital setting. Additionally, real-time will established monitoring systems including Ultrasonic Test (UT) wall thickness monitoring, online Probes and remote monitoring unites (RMU) for cathodic protection (CP) provides a continuous trend of the necessary data from critical systems and locations using wireless communication and visual correlation with other corrosion activity parameters. Market available software programs facilitates an integrated and holistic approach to corrosion, inspection, and integrity management.\u0000 The discussion in this article demonstrates the reduction in cost/resources associated with full changeout from manual regularly monitor application against using digitalized remote and real time monitoring systems at susceptible locations.\u0000 The approach used represents a corner stone in the integration and optimization of corrosion management and RBI systems. This is supported by a clear timeline for required corrective actions based on data provided by the real-time monitoring, which is the key element in decision making and successful planning. This will also lead to decrease in the time required and resources involved in the CM and inspection activities, while fulfilling integrity assurance, maintaining ease of installation and future expansion.\u0000 This article presents how the digitalization of integrated CM and RBI modules along with real time monitoring are exploited to enable proactive decision-making using data that is frequent and accurate, establish a transparent and standardized reporting and communication process, and enhance management engagement and modification for integrity investment, along the way, using wireless UT installation, online corrosion monitoring and RMU for cathodic protection are cost-effective, dependable and ready for expansion.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114570435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"True Single-Trip Wellbore Cleanout: Optimizations in Cemented Liner and Multi-Stage Frac Completions","authors":"Nata Franco, Luiz Miguel Cardoso, Mauricio Corona","doi":"10.2118/214003-ms","DOIUrl":"https://doi.org/10.2118/214003-ms","url":null,"abstract":"\u0000 Depending on the production requirements, the deep gas wells in the field were completed with cemented liner or multi-stage frac equipment. Following installation of lower completion, these wells historically required 3 to 4 wellbore cleanout runs prior to deployment of upper completion equipment. This paper will describe the optimizations done to convert all the cleanout runs, into a true single-trip job, reducing the total well construction by introducing groundbreaking technology and fit-for-purpose operations.\u0000 The standard procedure wellbore cleanout involved 3 to 4 trips: Firstly, cement cleaning was done inside the 4-1/2″ liner, including drill-out of shoe-track, followed by scraping of 7″ liner for running test packer tool; then run and setting of packer to perform casing and top of liner pressure tests; next perform full cleanout of casings, pickle production casings and displacing well to brine, and finally polish 4-1/2″ liner tie-back receptacle to receive upper completion assembly in cemented applications. Detailed engineering analysis, risk assessment and market research were conducted to develop an optimized wellbore cleanout assembly, to perform single-trip jobs.\u0000 The conventional cleanout package was upgraded with modified scrapers, magnets, and brushes, and combined with specialized high-pressure test packer and polish mill. Modification in equipment and procedures evolved following results and observations of several runs of the combined technology. The drilling and completion fluids were also re-engineered to ensure proper cleaning of casing and free-solids wellbore. The final results were an extreme success and single-trip wellbore cleanout became the new norm in the project. The innovate approach greatly contributed to reducing the number of runs to prepare the wellbore for upper completions.\u0000 Operations have been conducted safely throughout its implementation and kept at low non-productive rate. In average, the reduction of total well time was 3.5 days with relatively marginal tool rental cost increment. This optimization was a breakthrough in the Middle East with major rig time savings and it will serve as a reference for other operators and service providers to achieve step changes in similar operations. The key elements of this initiative will be described in detail in the paper.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131663080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effective Logging Identification of Chang 2 Low-Resistivity-Low-Contrast Pay Zones in a Sandstone Reservoir, Ordos Basin","authors":"Yang Wang, Yuedong Yao, Jieyi Chen, Jian Yang, Lian Wang","doi":"10.2118/214026-ms","DOIUrl":"https://doi.org/10.2118/214026-ms","url":null,"abstract":"\u0000 As one of the subtle reservoirs, low-resistivity-low-contrast (LRLC) pay zones are crucial potential exploration objective in Ordos basin. However, since its resistivity similarity to the adjacent water zones, and the genetic mechanism is complex, thence, LRLC pay zones still produce hydrocarbon at minimum resistivity contrast between hydrocarbon-bearing intervals and water-wet or shaly zones. So, if LRLC pay zones could be accurately identified only by conventional logging curves, it would bring new reserves to the development of Yanchang Oilfield.\u0000 Focusing on the difficulties in well logging identification of Chang 2 LRLC pay zones in Zhidan area of Ordos basin, the work on logging identification of low resistivity pay zones in this area is carried out by processing field data such as drilling coring, well logging curves, oil testing and daily production data. Meanwhile, combined with the experimental data such as NMR experiments, rock electrical experiments, laser particle size and cation exchange capacity experiments, we form an integrated workflow based on petrography, rock typing and petrophysical methods, and deal with the identification, characterization and evaluation of LRLC pay zones.\u0000 This study indicates that under the deposition environment of delta plain subfacies, Chang 2 reservoir is dominated by medium-fine-grained feldspar sandstone, and the pore structure is extremely complex due to the strong compaction. Therefore, the key cause for LRLC pay zones is the high salinity of formation water, accompanied by secondary reasons such as complex pore structure, and additional electron conductivity of the clay. In order to effectively identify the pay zones, we establish a set of suitable logging curve interpretation models based on the \"four properties\" relationship and test them with oil testing data, which could improve the accuracy of these models. Finally, the \"apparent formation water resistivity - deep induced resistivity\" cross-plot, the adjacent water zone comparison and the multivariate discriminant methods are selected to be suitable for Chang 2 low resistivity pay zones in the area. And these methods could help engineers to better estimation of water saturation in the low resistivity pay zones and accurately determine the target layer by using only limited set of well log data (conventional well logging data).\u0000 In this work, three effective logging identification methods have been proposed to determine the advantaged pay zones from qualitative or quantitative perspectives. Through real block verification, these methods could effectively improve the coincidence rate of logging identification, and would provide bases for selecting the target layers in original development areas. More importantly, the results may offer new perspectives for risk assessment and target layer determination of other similar low resistivity reservoirs exploration and development.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128085386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Extensive Evaluation of Different Reservoir Simulators used for Polymer Flooding Modeling","authors":"Aaron G. Tellez Arellano, A. Hassan, E. Al-Shalabi, W. Alameri, M. Kamal, S. Patil","doi":"10.2118/214088-ms","DOIUrl":"https://doi.org/10.2118/214088-ms","url":null,"abstract":"\u0000 The global interest in enhanced oil recovery (EOR) methods has been increasing recently as a source of satisfying the ever increasing energy demand. This is due to maturing of most of the existing and significant hydrocarbon reservoirs as well as the very limited number of new oil major reservoir discoveries. This is added to the challenging existing reservoirs conditions such as viscous oil, mixed-to-oil wettability, heterogeneity, and high temperature high salinity (HTHS). Polymer flooding is one of the robust and inexpensive EOR processes that improves sweep as well as displacement efficiencies. However, modeling of polymer flooding is a challenging task due to the difficulty in portraying all of the key physico-chemical aspects such as polymer rheology, adsorption equilibrium, inaccessible pore volume, and behavior against high salinity and hardness. This challenge has shifted the attention and efforts towards developing reliable reservoir simulators as tools for predicting and mitigating the risks-involved with polymer flooding projects.\u0000 In this study, we present a critical review of recent modules from different numerical simulators with chemical EOR (cEOR) competences such as CMG-STARS, ECLIPSE-100, and UTCHEM to model polymer properties. The review starts with description of numerical formulation and applications for different simulators. This is followed by descriptions of polymer models including viscosity, salinity effect, rheology, adsorption, and permeability reduction. Afterwards, the assessment of different simulators is presented through polymer flooding simulation cases as reported in the literature. It is to be noted that the overall results did not provide an insight into algorithm efficiency or computational cost of different numerical simulators, but instead mainly focused on the mechanistic modeling of the process with different parameters. The results suggest that with an appropriate mechanistic modeling of polymer flooding, there is potential for accurate prediction and optimization of various polymer flooding projects under diverse conditions, which is expected to positively impact the oil recovery efficiency and related economics. This study provides insights about the application scopes of different numerical simulators and their competences under diverse reservoir scenarios in order to obtain optimized performance of a polymer flooding field project.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130547430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Key Sweetspot Identification Methods and Their Significance for Hydrocarbon Well Placement","authors":"Menhal A. Al-Ismael, A. Al-Baiz","doi":"10.2118/213976-ms","DOIUrl":"https://doi.org/10.2118/213976-ms","url":null,"abstract":"\u0000 Sweetspot identification methods are of significant value in optimizing well placement in reservoir simulation studies. These methods vary in their approaches due to the wide-ranging reservoir characteristics and different study objectives. This work analyzes a number of sweetspot identification methods and discusses their advantages and limitations. In addition, we establish a workflow that utilizes a combination of a number of reliable methods. A simulation model of a synthetic heterogeneous reservoir with six million grid-cells is used in this work to evaluate six sweetspot identification methods for the purpose of well placement. The evaluated methods use grid-cell productivity, fluxes and sweep ratio as well as a combination of a number of rock and fluid properties to generate sweetspot 3D maps. Using sweetspot maps from the analyzed methods and the proposed workflow, different well placement scenarios are developed and compared. Results are compared using total hydrocarbon production and voidage replacement ratio. We observe that wells placed using grid-cell productivity maps achieve significant improvement in the total hydrocarbon production over a period of ten years when compared to the other analyzed methods. This method identifies the high productive grid-cells which results in the best performance of wells among the analyzed methods. However, this method provided less emphasis on the grid-cells proximity and connectivity in the sweetspot map. In heterogeneous reservoirs, this can result in tortuous trajectory paths, which are impractical to drill. The flux-based method yielded less hydrocarbon production, but higher voidage replacement ratio. The proposed workflow demonstrated considerable improvements in the total oil production and a balance in voidage replacement ratio. The new workflow retained the advantages of different methods maintaining a balance between their strengths and marking distinct methodology that can be used for well placement optimization. This work highlights potential opportunities to improve the sweep efficiency in heterogeneous reservoirs by developing a hybrid workflow that integrates existing tools and methodologies.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132475339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Role of Talent Management in Business Continuity","authors":"Sanaa M. Refaat El-Haraki","doi":"10.2118/214007-ms","DOIUrl":"https://doi.org/10.2118/214007-ms","url":null,"abstract":"\u0000 Talent Management plays a crucial role to support the business continuity and empower the most important asset for the company – its people. The role that Talent Management has played was highlighted in different aspects across the organization, starting from developing competent HR team and HR department structure that can influence company culture by taking an active approach in this regard.\u0000 The journey started by working with the executives and stakeholders across the business to evaluate the current company culture, assess potential gaps or opportunities, and create a strategic plan to align the organization's culture with its values and goals.\u0000 Moreover, a deliberate building of core and supplementary HR systems serving the business strategy while respecting culture readiness has taken place. This started off with developing leadership development programs, conducting a competency management system for better training and skills development, relying on assessment tools in recruitment and using these tools in the on-boarding, knowledge sharing approach, creating a performance management culture and working on continuous development and improvement.\u0000 The Leadership Development Program was achieved on 3 phases: Assessment phase, Development phase and re-assessment phase. One of the main objectives that we tried to focus on while implementing the leadership development program was to find employees who are potential leaders and nurture them early enough. In addition, it was crucial to identify a Leadership Competency Profile to have a clear, compelling vision of how the skills we were building in the leadership development program connect to the leadership road map in the company. In addition, and in the light of Covid-19 and the absence of Employee Training in 2020, the HR department came out with an initiative to carry out internal knowledge sharing workshops across the company. These workshops aimed at increasing employees’ awareness with the different functions across the company in addition to increasing the level of engagement, communication, and presentation skills for employees.\u0000 There is always a need to measure where we are and the progress done so far to know where we want to be and adjust the process accordingly. Therefore throughout all of these processes and programs, different feedback surveys were conducted to take necessary action plans. This helped in getting all employees onboard with us. Ultimately the alignment that was made between the Talent Management and the overall company's business strategy resulted in the company's ability to maintain a competitive advantage. A huge progress was made but the process continues to sustain this role.","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125109497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First Screenless Fracpack Application in Malaysia Proves to Be a Viable Development Method for Brown Fields and Marginal Fields","authors":"C. H. Roh, Mohd Hisham Abd Hamid, Zaidi Awang@Mohamed, Lie-Ernest Ndong Nguema, Yvonne Tan, Diana Madi, D. Dahasry, M. Rozlan, Sunanda Magna Bela, Imran Mortaza, M. Othman, A. Zeidan, Anwar Husen Akbar Ali, Nor Azwan Azahari, Subrat Kumar Dhal, E. Motaei","doi":"10.2118/214070-ms","DOIUrl":"https://doi.org/10.2118/214070-ms","url":null,"abstract":"\u0000 As part of well cost reduction initiative, screenless fracpack has been successfully applied in Field D in which gravelpack or fracpack have been the prevalent sand control completion methods. This paper discusses the first application of screenless fracpack in Malaysia with description on design process, implementation method, challenges in design and execution, production performance, and the recommended way forward.\u0000 Typical gravel pack or fracpack would require installation of downhole screen and packer assemblies, followed by gravel pack or fracpack pumping. The associated cost ranges from USD 1 million to USD 2 million for a multi-zone well. However, screenless fracpack application eliminates the high-cost screen and packer assemblies. Perforations are made with vertically oriented 0-180 degree phasing (up and down) to maximize fracture alignment with perforations as well as to minimize potential sand production from the perforations without fracture. Subsequently, perforations and near wellbore matrix are treated with resin injection to consolidate near wellbore formation in ensuring good sand/fines control in formation that is not fractured. Hydraulic fracturing utilizes tip screen out method to create short fracture length and wide fracture width to maximize dimensionless fracture conductivity. Proppant can be resin coated or treated with network of fibers to control proppant flowback in absence of downhole screen assemblies.\u0000 All planned procedures have been successfully conducted. Perforations were made in a short interval i.e. about 2m in length with limited entry 4 SPF/ 0-180 degree phasing. Dynamic underbalance technique was incorporated to maximize open perforations effectively. Resin injection plan was dropped due to low permeability and low injectivity. Resin squeeze into a tight formation can end with either incomplete resin and overflush injection, or fracturing with the viscous resin, either of which would damage the formation. A highly conductive fracture has been created with tip screen out. Nolte Smith log-log plot showed a unit slope, an indication of tip screen out. Proppant flowback control was obtained with resin coated proppant. Post screenless fracturing, the well was carefully unloaded and cleaned. Well production showed good productivity and effective sand control. Currently, other fields are being studied and considered for the same application.\u0000 Screenless fracpack is applied for the first time in a field offshore Malaysia. It is a bold step change whereby gravelpack or fracpack are commonly used as sand control. The application was driven by well cost reduction effort and the application is currently considered for replication in other fields. The benefit of the new method is not only the well cost savings by elimination of screen and packer assemblies, but it also provides full bore access and simpler well interventions. This application helps in brownfield and marginal field development whereby small reserves","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126724731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ocean Bottom Node Acquisition and Processing Techniques Provide New Insights into the Exploration Potential of the Gulf of Suez","authors":"K. Hussein, A. Kanrar, W. Saleh, A. R. Castelan, Y. Ibrahim, M. Khdhaouria, A. Elsabaa, E. Kocel, A. Khalifa, M. Abdelfattah, A. Abouelela, S. Tewari","doi":"10.2118/214002-ms","DOIUrl":"https://doi.org/10.2118/214002-ms","url":null,"abstract":"\u0000 The complex geology of the basin makes the Gulf of Suez one of the most challenging areas for seismic imaging. Strong impedance contrasts between lithological boundaries, such as the top of the layered evaporite sequence (LES) and various intervals within the heterogeneous LES, generate strong multiple reflections that mask the subsalt target at the reservoir level. Additionally, the halokinesis creates illumination effects in the pre-salt section. Existing legacy seismic data in the area, primarily from towed-streamer acquisitions, suffers from poor imaging, heavy multiple contamination, and a lack of illumination as the complex subsurface scatters much of the wavefront energy before it penetrates deeper pre-salt targets.\u0000 We performed extensive survey design and modelling (SDM) studies accounting for the challenges in the Gulf of Suez and completed simulations of different acquisition programs to evaluate the best parameters to solve these challenges. SDM studies confirmed that the long-offset, wide-azimuth, and high-fold attributes of an ocean-bottom node (OBN) acquisition coupled with a short, towed-streamer acquisition for near offsets would overcome these challenges to deliver improved images of the pre-salt target. Hence, in 2020, we executed the first ever combined OBN and towed-streamer acquisition in the Gulf of Suez, acquiring suitable data in the presence of the various obstructions including shipping lanes, platforms and pipelines that are common in this area. We present the challenges faced and our innovative use of existing seismic data processing technologies to maximize the potential of the inherent benefits of the full-azimuth, longer offset, higher fold and multi-component data recorded by the OBN acquisition. The up-down deconvolution (UDD) technique was used to attenuate surface multiples. As almost all the layers from the water bottom to the salt body are considered as strong multiple generators, internal multiples were also a significant challenge, and hence both short towed-streamer and OBN data were used to predict the internal multiples using all major multiple generators in the prediction process. The earth model building was performed using a cascaded top-down approach. Full-waveform inversion updates were interleaved with common-image point tomography updates, to define the shallow sediments, evaporite section and pre-salt target. Integration of the data available; OBN, streamer, gravity, magnetics, near field and well data was key to the success of the earth model building process. Comparing the final results with the legacy seismic image available, we observed that the OBN data substantially improved the imaging of pre-salt structure, stratigraphy, rotated fault blocks and dipping strata of the pre-rift and syn-rift reservoirs. Dip-meter data in the surrounding wells validated the steeper dips. The OBN image, combined with the short towed-streamer data, provides new insights into the pre-salt target and opens aven","PeriodicalId":286390,"journal":{"name":"Day 1 Mon, March 13, 2023","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126181028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}