Day 2 Tue, March 14, 2023最新文献

{"title":"An Experimental Approach of a Robust Polymer Gels for Water Shutoff Applications in Carbonate Formations","authors":"M. Alabdrabalnabi, Ayman Almohsin, A. Busaleh, Bader Ghazi Alharbi","doi":"10.2118/214168-ms","DOIUrl":"https://doi.org/10.2118/214168-ms","url":null,"abstract":"\u0000 Controlling unwanted water production is the key for the oil and gas industry. Consequently, water shutoff (WSO) fluids were introduced to favorably plug high permeability water zones or fractures and thereby reducing the water cut. Polymer gels have been utilized extensively to minimize undesired water production, especially from oil producers. Herein we present the study of gelation kinetics of an organically crosslinked polymer (OCP) gel with an adsorption system from intermediate to high reservoir temperatures.\u0000 In this study, we utilized a cost-effective and environmentally acceptable fluid system. The fluid consists of polymer gel and adsorption constituents for carbonate formations. The system can be pumped downhole to the targeted zones as a single-phase solution with low initial viscosity. A systematic evaluation of the polymer gel for WSO applications is conducted at varied reservoir conditions. This includes a thorough examination of fluid properties at surface conditions before gelation starts, at which the system is referred to as gellant. Furthermore, we studied the properties during and after gelation kicks off at a wide range of temperatures. The emphasis of the experimental investigation was on the kinetics of OCP gelation through performing several rheology experiments at various crosslinker concentrations.\u0000 The analysis revealed that the viscosity of the gellant at standard conditions was less than 20 cP; thereby, this contributes positively to having smooth surface mixing and pumping requirements for field testing. Based on reservoir temperature and cooling effect, the gelation time can be optimized by altering crosslinker concentrations. At fixed temperatures and varied crosslinker ratios, the gelation time exhibited a linear relationship with crosslinker concentrations. Additionally, the gelation time against temperature experienced an exponential behavior with reversible proportionality. By plotting the acquired data from massive rheological tests, we managed to attain precise correlations of gelation time for each OCP formulation. The gel prevailed in a high thermal stability fluid system to be gelled at a temperature of more than 250°F. Based on the presented lab observations, we concluded that this polymer gel system is expected to be trial tested in the field as WSO fluid for carbonate rocks.\u0000 The OCP gel is a promising technology to mitigate excess water production from oil producers. Since the system has a low initial viscosity, it can be injected naturally in porous media. The presented work offers an insightful polymer gel system as a WSO fluid designed for treating carbonate rocks.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"4 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":"133868704","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":"Gas Lift Application for Oil Wells with Heavy Crude, Thirty Years of Operation Offshore Gulf of Suez","authors":"Mahmoud Korish, M. Elwan, Hisham Mousa, Eman Said Shahin, M. Ibrahim","doi":"10.2118/214009-ms","DOIUrl":"https://doi.org/10.2118/214009-ms","url":null,"abstract":"\u0000 This paper presents the implications of Gas lift over the heavy oil fields, since Gas Lift is considered one of the oldest artificial lift techniques in Oil industry. Despite the numerous publications about different aspects of gas lift, few of them is meant to deeply consider the applicability of gas lift to heavy oil production. Gas Lift has been applied to heavy oil in different places around the world. For Gas lift has been used in Gulf of Suez in Egypt historically to produce Heavy Oil Reservoir with 17 – 19.5 API.\u0000 The major challenge for application of Gas lift in heavy oil application is the typical low GOR encountered in Heavy oil fluid properties. The low GOR may not be suitable for gas supply to compressors, which requires gas availability to avoid tripping due to low suction or overheating during startup operations. However, in many cases nearby gas wells has been used as gas supply to compression equipment used for gas lift.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"87 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":"129494727","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":"BI Dashboarding Application in Reservoir Simulation","authors":"K. Wang, Wadha Mubarak Al Araimi","doi":"10.2118/214219-ms","DOIUrl":"https://doi.org/10.2118/214219-ms","url":null,"abstract":"\u0000 A Business Intelligence (BI) tool is a type of software that is used to gather, process, analyze and visualize a large volume of data, whether it is historical data, live data or forecasting data for the future. The objective of implementing BI tool is to create interactive reports, generate actionable business insights, and to simplify / accelerate the decision-making process.\u0000 Depending on the size and the maturity of their fields, reservoir engineers often have to deal with a tremendous quantity of data from various categories such as simulation input or output, within challenging timelines. It is not uncommon that simulation REs spend the majority of their time in data pre/post-processing, grouping, filtration and setting up visualization templates, before being able to finally perform some value-adding results analysis and eventually improve the model forecasts.\u0000 This paper focus on the applications of dashboarding in reservoir engineering and simulation work using a popular BI software (Spotfire®) that is outperforming in many ways some industry-standard software, with objective of promoting the BI dashboarding culture within reservoir engineer population.\u0000 Depending on the purpose, various types of dashboard could be built, which allow RE users to better discover patterns and unveil the real meaning behind the data. In this paper, three templates (including history matching quantitative assessment, scenario comparator and PVT data QC) currently adopted by Abu Dhabi National Oil Company (ADNOC) Onshore asset are illustrated. Benchmarking against some conventional industry-standard tools is also performed to highlight their added-value.\u0000 As a result, in the context of a 2G & R integrated model review for a multi-billion-barrels reservoir, some concrete examples focusing on BI dashboarding assisted well-by-well history match is illustrated, which showcases how simulation REs could boost their daily work efficiency and create added value to the organization.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"34 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":"123790788","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":"Talent Management Practices at United Energy Pakistan","authors":"M. F. Bashir","doi":"10.2118/214190-ms","DOIUrl":"https://doi.org/10.2118/214190-ms","url":null,"abstract":"\u0000 As an E&P company in the upstream sector, United Energy Pakistan (UEP) heavily relies on the skills of its employees to produce expected business results. At the group level, UEP is credited for producing / nurturing the best of talent who have continually supported the group in strengthening its footprint in other parts of the world.\u0000 UEP's success in the past decade (since UEG acquired BP assets) is largely attributed to its people. UEP's focus has always been in hiring the right talent, grooming and nurturing them through the best of ‘on the job (OJT)’ experiential learning and classroom / virtual trainings. In 2019, the TLC framework was established to build the technical competence, leadership ability and to infuse a UEP way framework, of doing things (cultural relativism) in all employees.\u0000 The application of the TLC framework was backed by data fetched from multiple systems such as the competency management system (CMS) and the performance management system, which led to identifying the right technical / leadership gaps at an individual level and helped in working towards the overall employee and leadership development.\u0000 The framework also considers the development of emerging leaders. Employees are calibrated on a 9-box grid and review discussions take place from the potential, performance and progression stand point. The talent review forums also incapsulates discussion around development and succession.\u0000 Without an enabling environment, the best of talent / processes cannot flourish. UEP's core values & leadership behaviors & the code of conduct are the fundamentals on which employee bases his / her overall conduct and day to day doing. These core values & etiquettes of working are termed as the UEP way framework. There is an engagement survey which is conducted once in two years and acts as a check and balance mechanism between management and employees.\u0000 The paper will discuss in detail how the TLC framework has helped UEP in managing talent by building technical competence, a leadership mindset and to operate with a UEP mindset in a fast-paced dynamic environment.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"41 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":"126432130","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":"Unique PDC Bit Design Significantly Improves Drilling Efficiency Across Several Interbedded Formations","authors":"A. Hababi, Mahmoud A. Omar, Dawood Alqunais, Paul Teasdale, Matt Case, Chris Casad","doi":"10.2118/214240-ms","DOIUrl":"https://doi.org/10.2118/214240-ms","url":null,"abstract":"\u0000 Drilling interbedded formations through alternating soft and hard layers is challenging due to torsional instability that could damage the PDC bit. The traditional PDC bit design approach to overcome this challenge is to use secondary elements that control Depth Of Cut (DOC) and limit torque fluctuations. While this approach can be effective, it limits ROP. This paper presents a unique concept that utilizes advanced cutting elements across the bit to control DOC while improving ROP.\u0000 The Design engineering focal group have developed a new PDC bit with an alternate cutter arrangement to drill transitional zones more efficiently. Although PDC bit designs with various configurations of cutters have been utilized, the need remains for an innovative solution to improve stability and ROP. The novel PDC bit has cutters that are strategically placed in the cutting structure with alternating passive and aggressive back rake angles to manage DOC and increase ROP. The strategic cutters arrangement enables the PDC bit to shear the formation effectively from different points of contact in a passive and aggressive manner.\u0000 Introducing the new concept in four PDC bits designs helped to achieve a step change in drilling performance in challenging applications that generate extensive torsional vibrations. The initial testing in 16-in vertical section showed 24% ROP improvement, achieving the highest ROP in a well-established field of more than 300 wells. Moreover, the rerun of the same PDC bit achieved the second highest ROP in the same field. Additional testing in lateral sections showed 6 1/8-in PDC bit increased ROP by 42% in offshore, and 5 7/8-in PDC bit drilled the longest footage in Ghawar field, achieving 41% ROP improvement and 14% increase in footage. Subsequent testing in 17-in vertical section showed similar performance with 22 % ROP improvement in south Ghawar.\u0000 The developed concept provides an advanced solution to the challenge of drilling with PDC bit through transitional formations. The performance studies demonstrate that PDC bit with alternating cutter back rake angles reduced torsional instability by 30% in interbedded formation, decreased torque fluctuations and delivered a smooth torque response. The new PDC bit also increased the durability and the dull condition by two wear scale. Overall, the innovative cutters configuration helped to enhance drilling efficiency and provided significant cost savings.\u0000 This paper demonstrates the value of the new PDC cutting structure layout that can deliver enhanced performance and dull condition in variety of applications where torsional vibrations leads to premature bits failure. The new concept can also be applied to existing designs to further improve performance in transitional applications and reduce drilling cost.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"3 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131437906","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":"Practical Imaging Applications of Wettability Contact Angles on Kuwaiti Tight Carbonate Reservoir with Different Rock Types","authors":"S. Al-Sayegh, R. Flori, W. Al-Bazzaz, Sohaib Kholosy, Hasan N. Al-Saedi, Abdulaziz Abbas, A. Qubian","doi":"10.2118/214165-ms","DOIUrl":"https://doi.org/10.2118/214165-ms","url":null,"abstract":"\u0000 This study focuses on a tight carbonate reservoir which is located in Northern Kuwait and is classified as an unconventional reservoir. A practical imaging technique of wettability contact angle (θ°) presents \"big data\" as well as relative-permeability (Krw and Kro) measurements. Also, modeling, through rock image technology, the vast well-documented grain/pore boundary morphology available inside fresh rock fragments have achieved good results. Conventional laboratory relative-permeability experiments are expensive and time-consuming. This study introduces a novel method to measure/calculate relative permeability through fast, less expensive, non-destructive, and environmentally friendly techniques of imaging technology. One tight carbonate reservoir is selected, imaged, processed, analyzed, and then modeled using several pore diameter morphological models. The images are captured using a backscattered electron microscopy BSE-SEM technology analyses.\u0000 In this study, two-dimensional images are used to characterize the morphology of selected samples grains and pores, using a two-step technique. In the first step, the image is captured using a backscattered electron detector (BSE), digital electron microscopy imaging, and pore-counting processing technology. All of the sample grain/pore features captured in the image are reported in micrometer units. In the second step, the pore area of such features is scanned using image analysis software that can accurately measure several morphological parameters of pore and grain spaces.\u0000 A robust technique of visual estimate is used, which has the advantage of speeding the image analysis process. The visual analysis software tool counts different pores and counts grains and also measures their shapes and sizes which are crucial for relative permeability calculations. Several pore morphological models have been considered for optimum accuracy comparisons, including pore/grain relationships (area/perimeter), pore contact angle (θ), and pore count. Relative permeability is calculated based on the area of the pore/grain features measured from two-dimensional images.\u0000 The study objectives are to accurately measure the wettability contact angle of huge pore geometries using 2D image technology to understand the nature of the pore network in the candidate reservoir. To study the relative permeability of internal influences of pore and grain morphology needed for enhanced oil recovery/improved oil recovery (EOR/ IOR) future programs. And, finally, to measure relative permeability faster and more accurately.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"32 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":"131512070","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":"Intelligent Course Recommender for Professional Development","authors":"Danah Adel Al Mudaifer, Rahaf Salem Al Qahtani, Sarafudheen Veettil Tharayil, Abdulaziz Almass, Serkan Dursun","doi":"10.2118/214116-ms","DOIUrl":"https://doi.org/10.2118/214116-ms","url":null,"abstract":"\u0000 One of the major challenges faced in oil and gas industry today is talent management of its workforce. Training the workforce and suggesting the right training courses to the individuals is important in talent management and career development. There are many training recommendation systems available using different machine learning approaches such as collaborative filtering, neural networks and hybrid models. In this paper, an intelligent recommendation system is proposed by blending machine learning algorithms, natural language processing (NLP) and text analytics combined with organizational preferences. This framework gives a recommender system considering the user profiles, training preferences for his or her organization where each set of organizational units will have unique training recommendation requirements considering organizational functional behavior. The proposed mechanism uses machine learning algorithms at different stages of its learning process and ensemble them in a unique fashion such that desirable results are achieved to the user satisfaction.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"32 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":"121448920","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 Fracturing Cutter Development and In-Bit Sensing Parameter Optimization when Drilling a Challenging Heterogeneous Section Containing Massive Cherts with a PDC Containing Both Shearing and Fracturing Elements","authors":"Y. Nunez, F. Ruíz, Mouza Al Nuaimi, A. Amorocho, Nicola Connelly, Hany El-Hafez, Juan Carlos Fierro","doi":"10.2118/214236-ms","DOIUrl":"https://doi.org/10.2118/214236-ms","url":null,"abstract":"\u0000 A PDC design containing updated fracturing elements and utilizing in-bit sensing to optimize parameters can deliver improved ROP and drill a challenging heterogeneous section containing massive chert in one run compared to previously used PDC. The demonstration is supported by a real field case from an unconventional gas exploratory field project in Abu Dhabi.\u0000 In this unconventional field, seven wells have been drilled using three bits on average to complete the 12 ¼″ section (tricone and PDC) where the presence of chert has resulted in additional trips due to bit life. The content of cherts are large, at approximately 2,000 ft thick, which is the reason why it was decided to think of a new customized PDC bit design and use it in well number seven. The plan is to prove that is possible to achieve one run to TD by fracturing cutter development and optimized drillers roadmap using in-bit sensing.\u0000 The new unique PDC shaped cutter, with increased point surface area and thicker diamond table, makes the overall design more impact resistant and reduces vibrations while drilling. In bit sensing data is utilized to increase the efficiency in rock interaction through optimized parameters. It will be used in the ongoing exploratory project to demonstrate its advantage in terms of cost saving and rig time reduction.\u0000 The study will compare the data with previously used bit and create a basement for the exploratory field in 12 ¼″ section. A strong hypothesis is that this bit will complete the well in this particular area and optimize drilling costs in development studies.\u0000 Where such non-homogenous formations containing massive cherts can be crossed and have detrimental impact on the bit life, the novelty is to bring to the stage an enhanced combined PDC and parameter solution, which will be able to offer a different alternative by reducing torque, having healthier wells, and optimizing drilling cost in this unconventional field where drilling CAPEX reduction are paramount.","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 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":"129170390","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 Application of Pressure Mud Cap Drilling Technique with Manage Pressure Drilling in Unconventional Gas Exploratory Onshore Field in UAE Allowed Operator to Reach Target Depth and Complete the Wells","authors":"F. Ruíz, M. Elzeky, Rahma Al Rahma, Abdulrahman Hasan Al Ali, Faisal Siddiqui, Y. Nunez, A. Lari, Ayman Hebish, Ashraf Ali, I. Hamdy, Ayman El Shahat, E. A. Al Shamisi, Ali Sulaiman Bin Sumaida, Ahmed Abdulla Al Mutawa, Boaventura Bau, Cesar Orta, Daniel Juarez, M. Saleh","doi":"10.2118/214180-ms","DOIUrl":"https://doi.org/10.2118/214180-ms","url":null,"abstract":"\u0000 This paper undertakes the application of Pressurized Mud Cap Drilling (PMCD) technique with Manage Pressure Drilling (MPD) as a new drilling approach in the Unconventional Gas Exploratory field to successfully drill through Nahr Umr & Shuaiba formations managing the risks associated with total losses due to the natural fracs and faults in the area, which if drilled conventionally instigate well control situations, large amount of drilling fluid lost into reservoir and not reaching the target depth (TD).\u0000 One of the most powerful drilling techniques to apply in unconventional wells is MPD, It's used to optimize drilling operations under critical challenges, such as narrow window between pore pressure, hole instability and fracture pressure, pressure heterogeneity when drilling different formations and severe downhole losses.\u0000 Study was carried out to mitigate challenges across 8-½\" and 6″ holes based on previous conventional drilling experiences of simultaneous kick and loss events, MPD system was introduced to overcome that challenge. When severe losses were encountered at Nahr Umr & Shuaiba formations PMCD, an MPD technique, offered the ability to reach well TD despite the total losses using 3 different drilling fluids, Sacrificial fluid (SAC), Light Annular Mud (LAM) and Kill Mud Weight (KMW) in closed-loop drilling without mud returns while stablishing a mud cap in the annulus managing the wellhead pressure by bullheading to stop gas migration.\u0000 PMCD facilitated drilling under suddenly total losses minimizing the mud consumption, reduced time/cost and avoided un-controlled release of hydrocarbons. Four wells were successfully drilled, for a total of 1,183 ft, under severe Losses where LCM treatment could not heal the natural fracked formation. PMCD converted conventional drilling into close-loop drilling system by installing Rotating Control Device (RCD) on top of the annular Blow out Preventer (BOP) establishing mud-cap in the annulus and allowing constant monitoring of the well conditions via Surface Back Pressure (SBP). A positive injectivity test was performed after total losses to confirm the formation can take drilling fluid and cuttings. Drilling started with SAC injection in the string and LAM injected intermittently in the annulus through the RCD, whenever the SBP required to be managed due to gas migration effect into the mud cap. Tripping out of hole the drilling BHA and running completions were performed in PMCD mode.\u0000 This paper is the number four written (Previous: SPE-207798-MS, SPE-211775-MS & SPE-211775-MS) for the milestones achieved to develop this new area with Geo-political strategic for UAE.\u0000 Apply the PMCD, helped to reduce the time of drilling & completion in the UC wells, due to the losses control, from 35 days in average to 10 days, and saving ± 50% of the budget in the target sections (8-1/2″ & 6″).","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"34 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":"126420167","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":"Innovative Polymeric Nanoparticles Associated with Engineered Bridging Particles Solve Depleted Reservoir Drilling Challenges (Case Study: Gulf of Suez)","authors":"Y. A. Mohamed, R. Ahmed, Helal Ahmed El-Agamy, Mahmoud Mohamed Kheir, Sherif Saber Ahmed, Samer Hazem Hassan, Ahmed Saber A.Hady, Ayman Abd El-ghany Al-Zahry, Ayman Mohamed Salama, Lotfey Ahmed Gaber, A. Ouda, Ahmed Ibrahim Ismail, Mohamed Farouk Mohamed, Sally Ahmed Mohamed","doi":"10.2118/214227-ms","DOIUrl":"https://doi.org/10.2118/214227-ms","url":null,"abstract":"\u0000 Over the years, the drilling fluids industry has focused on solving problems related to non-productive time, primarily wellbore stability and lost circulation. Today, drilling fluids have evolved into high technology fluids that maximize drilling efficiencies, overcome anticipated drilling risks, and provide a stable wellbore within budget.\u0000 Drilling a single hole section to accommodate formations with different pore pressures, formations such as unstable shales and into a depleted sand reservoir under a high temperature environment can be very challenging. To promote wellbore stability, a higher fluid density is often required to balance the highest possible pore pressure and minimize the potential for any formation break-out due to prevailing in-situ stress conditions. Increased fluid density will lead to a higher differential pressure across the depleted reservoir layers, and hence, the risk of lost circulation will increase. The risks of formation stability and lost circulation therefore create greater challenges for the planning team in order to drill the depleted reservoir in a one-hole section.\u0000 A novel approach of using polymeric nanoparticles (NPs) in the design of a non-aqueous drilling fluid with an optimized and selective range of pre-determined, sized bridging materials based on software modelling has been applied successfully at the Saqqara field in the shallow waters of the Gulf of Suez to eliminate or minimize the risks associated with drilling the depleted reservoirs. A case study is included, which was the main motivation for writing this paper. The case study covers two wells that were sidetracked and drilled successfully as 6-inch hole sections, penetrating the abnormally pressured formations with a relatively lower fluid density compared to data from offset wells and the subnormally depleted reservoirs, with up to 2,600 PSI overbalance with a bottom hole temperature (BHT) of up to 350° F.\u0000 The effectiveness of the polymeric NPs can be attributed to unique characteristics such as a very high specific surface area of 33.7 m2/g, narrow particle size distribution (PSD) between 135 and 255 nm with a D50 value of 179 nm, and their deformable nature leading to effective sealing performance. The effect of these NPs on the properties of oil-based drilling fluids has been evaluated through a variety of experimental lab tests. Rheological properties at different temperatures and filtrate loss were measured to study the effect of the NPs on the base fluid. The study indicated that small concentrations of NPs could provide a better performance for the drilling fluid along with high temperature resistance.\u0000 This work focused on the role of NPs in designing a smart drilling fluid with tailor-made rheological and filtration properties. The paper also briefly describes the operations and discusses the challenges related to drilling in depleted reservoirs and how new drilling fluid technology makes difficult wells possible to drill","PeriodicalId":349960,"journal":{"name":"Day 2 Tue, March 14, 2023","volume":"34 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":"131526801","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}