Day 3 Wed, February 14, 2024最新文献

{"title":"Accelerating Drilling Efficiency and Consistency: A Rig-Based Approach to Exponential Drilling Program Improvements","authors":"C. Major, T. Hall, W. Stogner, S. Kern","doi":"10.2523/iptc-23554-ms","DOIUrl":"https://doi.org/10.2523/iptc-23554-ms","url":null,"abstract":"\u0000 The evolution of the drilling process has been sustained by consistent innovation and development, bringing the industry to where it is today. Innovation moves us forward: data is processed faster, flat time is reduced, roles are redefined; but the vehicle to achieve a successful drilling program remains: the drilling rig. This paper investigates efficiency in its many forms, and the foundational role that the drilling rig plays in fulfilling the global need for energy.\u0000 Over time it has become evident in the industry that evolving the rig design process helps to achieve greater overall success of a well program. As less flat time occurs, well cycle time decreases, increasing the total amount of feet drilled per day and likewise increased hydrocarbon production in that same timeframe. Innovative advancements, through progressive iterations in rig design, have led to significant efficiencies in flat time reduction through initiatives like rig floor automation and installing a rig walking system. As these efficiencies become more realized, consistency is increased allowing for better forecasting of long-term well programs.\u0000 A historical account of pivotal drilling rig advances will be discussed in detail, along with specific applications of automation and a walking system that modern well programs require. Creating a new rig fleet using repurposed equipment is not only economical, but also a sustainable solution and of significant value as carbon emission reduction increases in importance across operator and supplier initiatives.\u0000 Introducing walking rigs to a global fleet has contributed to reducing well cycle times by over 35% from 2016 to 2022. What was once a three-to-five-hour release-to-spud skid, is now as low as an hour and a half through the use of walking technology.\u0000 The benefits to a standardized rig fleet will be presented: reducing inconsistency, increasing quality of support, and enabling an agile support staff; while providing a consistent platform to launch drilling applications where newly learned best practices can be immediately applied fleet wide.\u0000 Today's drilling environment requires an integrated approach, enabled by both people and technology. The drilling rig provides a strong foundation, as a platform for further technological innovation through automation. As the industry continues to evolve, the clear benefit of field-proven equipment and technology supports breaking through barriers in unconventional drilling.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"458 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528192","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":"Modeling the Effect of Transient Viscous Forces on Sucker Rod Pump Performance and Run Lift","authors":"A. Aql, E. Al-Safran","doi":"10.2523/iptc-23173-ms","DOIUrl":"https://doi.org/10.2523/iptc-23173-ms","url":null,"abstract":"\u0000 The sucker rod pump is commonly used to lift heavy oil wells under thermal production to maximize the flow rate due to its high efficiency and reliability. However, rod fatigue and possible failure are commonly encountered when rod design does not incorporate the appropriate loads, especially in high-viscosity conditions. Although the existing commercial design tools solve the wave equation to predict rod string life, they do not incorporate the effect of liquid viscosity, resulting in prediction discrepancy and inappropriate rod design and pump operation. The aim of this study is to propose a theoretical model to investigate the effect of the transient frictional forces acting on sucker rod pump subsurface components, i.e. rod and pump. Furthermore, a sensitivity analysis case study is carried out to investigate the effect of various flow and design parameters on the rod top-of-section stresses, rod buckling tendency, and fatigue life. This work provides a comprehensive understanding of the underlying interaction between fluid flow behavior and rod dynamics.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"19 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527618","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":"Real Time Petrophysics via Artificial Intelligence in Brown Field Development","authors":"J. Shah, S. Sansudin, M. I. M. Fadhil, Ismail Marzuki Gazali, A. F. Zakeria, Husiyandi Husni","doi":"10.2523/iptc-23561-ms","DOIUrl":"https://doi.org/10.2523/iptc-23561-ms","url":null,"abstract":"\u0000 The paper introduces a novel approach to evaluate well log data in real time during downhole data acquisition. This approach has been successfully implemented in multiple drilling projects. It relies on effective real-time data transmission with the key enabler of the system is development of the well log artificial intelligence module. Time is of the essence during drilling operations. Hence, any efforts towards increasing the operation efficiency can lead to a safer and more optimized well delivery. A machine learning application for real-time petrophysical evaluation during drilling was successfully developed to achieve this ambition. The application which named Well Log Data Artificial Intelligence was tested in a Malaysia complex brownfield infill drilling project, where it proved to promote a seamless decision-making process during drilling and simultaneously lead to financial and operation value creation. The application uses selected key wells in the field as training dataset before the actual drilling operation. Random Forest ensemble was utilized for model learning and correspondent petrophysical evaluation, The module can predict reservoir characteristics in real-time by leveraging on feeder open hole raw curves as inputs with integration of existing trained model and real time data transmission. Moreover, the application provides easily accessible prediction results through the same display interface as the real-time data transmission. This makes it attractive for multi-disciplinary utilization during discussion.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"6 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527770","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":"Utilizing Integrated Network Model to Optimize Production and Prevent Halite Formation in Pipeline Offshore Gulf of Suez","authors":"M. E. Sayed, M. Korish, H. Mousa, A. Moussa","doi":"10.2523/iptc-23570-ms","DOIUrl":"https://doi.org/10.2523/iptc-23570-ms","url":null,"abstract":"\u0000 Scale deposition has always been an irritating problem for oil and gas industry. Scale typically results from a chemical state of supersaturation, which results from changes in pressure, Temperature & PH across production system. At this time precipitation reaction takes place and the mass of scale deposition is a function of the available amount of cation and anion species related to subject scale. Typical forms of scale are calcium carbonate & Sulfate, Strontium & Barium Sulfate. Commonly Deposition rate for such types of scales is quite slow due to limited concentration of relevant species. For the case of halite deposition chlorides salts are abundant species in water that in case of deposition would result in huge mass that may block tubing, flow lines and pipelines in short time.\u0000 Subject Field is located offshore Gulf of Suez, rimary reservoir is Nubian sandstone at depth of more than 11000 Ft & Temperature of 330 F. Formation Salinity around 350,000 PPM. Typically, water is in equilibrium at reservoir conditions and high productivity of wells allows high wellhead temperature which keeps chloride salts soluble in water.\u0000 The field produces through two 12\" pipelines to a central processing facility. s the flow goes heat exchange takes place and soon balances with seabed temperature. Scale tendency calculations showed Halite would precipitate at 90 F. which means the vast majority of pipeline will be subject to the risk of halite deposition. This matches with a biweekly to monthly increase in line pressure impacting production due back pressure on producers and at critical point emergency shutdown would trip to protect line integrity.\u0000 The problem has been persistent that shutdown was expected on monthly basis and logistics consumed to pump fresh water followed by soaking time and pigging to ensure line pressure kept to minimum otherwise it will not take long before line plugs again. In 2020 a detailed Network Model coupled with scale formation prediction tool to determine pressure and temperature profile in subsea pipeline and expected scale formation rate with distance from platform.\u0000 Network optimization model showed that commingling specific wells on one line and keeping others on the other line would result in decreasing the risk of halite scale, investigations showed some incompatibilities between water from different wells that can be managed with scale inhibitor.\u0000 Application of the outcomes from network model in the field resulted in maximizing production eliminating downtime due to line pressure increase and eliminated the need for biweekly fresh water pumping.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"107 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527914","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":"Enhancing Production Efficiency by Unloading Produced Water and Condensate Using Engineered Surfactants: Case Histories","authors":"M. Omer, John E. Busteed, F. Fragachán","doi":"10.2523/iptc-23579-ms","DOIUrl":"https://doi.org/10.2523/iptc-23579-ms","url":null,"abstract":"\u0000 Due to the depletion of reservoirs, liquid loading has become one of the common issues in mature fields. It happens where gas rates are not sufficient to lift associated reservoir fluids to the surface. Foaming surfactant injection is one of the methods used to mitigate liquid loading and enhance stable hydrocarbon production. In foam-assisted lift, a well is offloaded by creating foam downhole by the injection of surfactants. Surfactants reduce the liquid surface tension resulting in foam creation when the gas mixes with water or condensate downhole. This results in reduced liquid density and reduces hydrostatic pressure, thereby increasing drawdown and increasing resulting production.\u0000 We have developed a method to design and evaluate foaming surfactant performance for unloading water and for unloading condensate. This method eliminates the potential to create stable emulsions (through high mechanical shear). Additionally, the methods outlined will avoid misleading interpretations where only the foam half-life has been considered. Falsely optimistic results, from a foam half-life perspective, can occur where certain surfactants result in \"weak\" foams that can maintain volume while \"dropping\" a large fraction of the \"liquid\" out of the foam. In this method, foam density, or foam mass versus time, is considered.\u0000 The study results in an evaluation through the measurements of the time to create a known volume of foam, the rates of foam dissipation, and liquid phase recovery rates. This analysis is done by plotting foam multiple parameters versus time. Finally, the observation of individual phase attributes is carried out.\u0000 This paper will introduce a unique methodology, process, and design to evaluate foaming surfactants for condensates and for produced water. This paper will also present the findings from foaming surfactant applications for unloading produced water in the Middle East, Asia, and unloading condensate from wells in Europe. This work will help in optimizing the design for foaming surfactants and, hence, help enhance hydrocarbon production.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"27 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528025","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":"Rock Physics Modeling and Iterative Petrophysics Driven Inversion Results: Estimating Subsurface Petrophysical Properties and Characterizing Reservoirs - A Real-Time Case Study of Clastic Gas Field in Pakistan","authors":"Adil Azeem, Ali Hameed, M. M. Ali Virk, F. R. Awan, Akash Mathur, M. F. Abid","doi":"10.2523/iptc-23267-ms","DOIUrl":"https://doi.org/10.2523/iptc-23267-ms","url":null,"abstract":"\u0000 Rock physics modeling (RPM) using iterative petrophysics is a vital tool in the oil and gas industry for predicting subsurface properties and characterizing reservoirs. This technique has revolutionized the way in which analysis and interpretation of seismic inversion data has been performed and provided better understanding of the subsurface geology. The main scope of this work was to highlight the importance of using RPM logs data as opposed to using directly recorded and linear regression based corrected logs for seismic inversion input.\u0000 The approach that was followed for this study started with building a consistent RPM based upon the iterative petrophysics. The results of RPM data were compared with recorded and multi-linear regression (MLR) data-set. The main quality check for the health of the well log data was set to see which data will provide a closer correlation to the original seismic amplitude versus offset (AVO) response. Using well to seismic tie of RPM and recorded well logs data, the well based wavelets were extracted and compared. Moreover, the pre-stack inversion was performed with the optimized parameters. Furthermore, consistent well based probability density functions (PDFs) for two different facies were generated and implemented on the inversion results. Finally, the results were quality assured on the blind wells.\u0000 It was concluded that, the well based elastic logs response were improved dramatically using RPM and iterative petrophysics approach. The modeled AVO response (intercept and gradient) of the RPM based data was much closer to the original conditioned seismic data as compared to data from Multi-linear regression (MLR) and original recorded logs data. RPM data provided a far better well to seismic tie, an average cross-correlation improvement from 50 to 70%, resulting in a consistent well based wavelet. In addition, this led to improved PDFs and implementing them to the pre-stack inversion results. Furthermore, the correlation of the predicted litho-facies at the blind wells were consistent with the encountered petrophysical properties.\u0000 This study highlights the importance of RPM and iterative petrophysics as a vital tool for oil and gas industry. Current study not only highlights their importance but also highlights importance of effective reservoir characterization with enhanced seismic data interpretation, robust well-ties and accurate porosity and litho-facies away from wells. These insights not only have a huge impact on reservoir monitoring and management but also crucial for strategic decision in the industry.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"234 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528041","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 Trial of On-Demand Activated Axial Agitation System on Abu Dhabi Offshore Operation","authors":"A. Wahyudi, H. Biyanni, A. Tamuli, C. Agarwal, L. Hermawirawan, M. Nowfal, R. Che","doi":"10.2523/iptc-23365-ms","DOIUrl":"https://doi.org/10.2523/iptc-23365-ms","url":null,"abstract":"\u0000 The Axial Agitation System is an effective friction reduction solution on directional motor and rotary steerable system (RSS) bottomhole assemblies (BHA). Drilling performance in a high dynamic friction environment is often limited due to high fluctuations in the drillstring’s revolution per minute (RPM) and torque, often coupled with stick/slip. This drilling dysfunction diminishes the amount of energy spent on rock shearing. The weight on bit and torque from the surface are not efficiently transmitted to the bit. If left unchecked, the rate of penetration (ROP) will be suboptimal, and stick/slip may lead to mode-coupling of vibration (lateral, axial) and BHA whirl, increasing the risk of downhole tool failures and non-productive time (NPT).\u0000 The Axial Agitation System has been successfully paired with RSS drilling BHAs in ADNOC Offshore fields in 13 different wells. The first three wells were qualitatively and quantitatively studied by Gohel et al.6. Performance analysis performed on each well against a comparable offset well consistently demonstrates considerable improvements in drilling performance. While efforts have been made to select offset wells with minimal differences (well trajectory, BHA and drillstring design, formations, etc.), there is still a variety of RSS applications where the Axial Agitation System’s benefits need to be fully quantified and objectively concluded.\u0000 An On-demand Axial Agitation System that can be activated—when needed—allows for a more objective comparison since the bit, BHA, drillstring components, and dynamic environment remain constant. This paper analyzes the first trial results of this on-demand axial agitation system by benchmarking the drilling performance before and after activation in two wells offshore Abu Dhabi.\u0000 The data were acquired from two wells with different directional profiles and BHAs to prove that the agitation effect was equally tangible in different applications. The analysis metrics include, but are not limited to, mathematically modeled algorithms during the planning stage, surface data acquisition systems, and downhole dynamics measurements.\u0000 The results of the analysis quantitatively indicate an enhancement of the drilling dynamics by more efficient use of available energy for maintaining and improving the ROP. To further enhance system performance, lessons learned are identified and discussed in this paper.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"49 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527980","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":"Clear Skies Ahead: Optimizing Operations Through Large Language Models and AI to Reduce Emissions and Costs for a Regional NOC","authors":"J. Thatcher, Assilkhan Amankhan, M. Eldred, Abhijith Suboyin, Carsten Sonne-Schmidt, Abdul Rehman","doi":"10.2523/iptc-23334-ms","DOIUrl":"https://doi.org/10.2523/iptc-23334-ms","url":null,"abstract":"\u0000 This manuscript presents an industrial case study and analysis leveraging Artificial Intelligence (AI), Large Language Models (LLMs) and advanced analytics to optimize offshore operations for a regional NOC while reducing the emission footprint and costs. The scope of this study also included a detailed analysis of potential challenges and benefits of using LLMs.\u0000 Along with industrial data, this case study includes a comprehensive literature review on helicopter transportation, safety, and environmental impact, as well as explores strategies to improve overall operations, and to reduce GHG emissions. In conjunction with analysis of relevant data sources, data on GHG emissions from helicopter transportation were also collected and analyzed. The potential benefits of schedule optimization were evaluated, including leveraging the capabilities of LLMs for reductions in manpower, flight time, fuel consumption, and GHG emissions. Various optimization algorithms for schedule were also reviewed and compared.\u0000 Results from the study indicate that implementation of the presented strategies including LLM models not only improve productivity & safety, but also reduce emissions and fuel consumption resulting in cost savings for helicopter operators. For instance, LLMs assisted in making bookings and querying schedules within minimal intervention resulting in cost savings due to reduced reliance on human labour; increased efficiency through automation; improved accuracy through elimination of manual data entry and automated data validation; coupled with enhanced data analysis to provide valuable insights for real-time decision making. Further reductions were also achieved through modifying the helicopter schedule to decrease ground idle time, enhancing flight routing, and optimizing the speed and altitude of the helicopter. The industrial case study indicates that these strategies could potentially reduce CO2 emissions by up to 18% per flight while reducing the overall cost by 24%.\u0000 The conclusion drawn from the analysis is that such optimizations are a promising approach to reduction in costs and emissions with increased efficiency and accuracy. This research offers novel insights into the potential application of multi-layered AI and LLMs to optimize helicopter operations without compromising on sustainable practices. This study offers valuable information for the aviation industry looking to enhance operations sustainably through a comprehensive evaluation of the environmental impact of practices in place and examining the efficacy of optimization measures.\u0000 The study's conclusions have relevance for anyone working in the aviation sector since they show that adopting sustainable techniques to lessen their influence on the environment is both feasible and beneficial. By highlighting the potential of multi-layered AI and LLMs to optimize operations including offshore transportation, this paper offers a valuable contribution to the ongoing effort to improve","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"172 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528457","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":"Optimization of Pulsed Neutron Logging for Real-Time Water Management Through Oxygen Activation and Water Flow Logs","authors":"N. Yusuf, C. Cavalleri, W. A. Tolioe, L. H. How, S. H. Daud, D. Johare, M. S. Hendrawati, A. G. A. Halim","doi":"10.2523/iptc-23368-ms","DOIUrl":"https://doi.org/10.2523/iptc-23368-ms","url":null,"abstract":"\u0000 Pulsed neutron logging (PNL) is often part of production enhancement strategies to evaluate remaining potential and water flow, guiding intervention plans and de-risking water shutoff opportunities. The qualitative assessment of the oxygen activation (OA) curves response can accurately pinpoint zones potentially affected by water flow and can be used on real-time to optimize the selection of representative depths for water flow logging (WFL) station survey.\u0000 Both OA and WFL operate under the assumption that oxygen nuclei represent the borehole water phase. The OA continuous measurement of the oxygen activation is made during a window when the burst is off and only the activation background from the formation and the borehole is recorded. Depending on the toolstring configuration, the OA curves are sensitive to up or down flow of water, while the signal amplitude varies with velocity and water holdup. Regions where the OA curve amplitude and separations are more pronounced indicate possible crossflow or movement where the water velocity is faster than the tool.\u0000 The OA curves are recorded during standard depth logging passes performed for petrophysical parameters and saturation monitoring, without the need of separate passes; these curves help in highlighting changes in the borehole conditions, detecting unexpected flow, and indicating where to do WFL stations. In some logging programs where WFL stations were not planned, the real-time findings from the OA curves have enabled the extension of the log data acquisition to further investigate potential water movement with WFL mode, confirming the presence of fluid movement or recirculation at the wellbore. A good qualitative match between the OA curves behavior and the WFL stations’ result is observed in most cases.\u0000 As indicated by the physics of the measurement, the pulsed neutron tool can only be configured to detect one flow direction per descent; reconfiguration for inverted positioning of transmitter and detectors is required for sensitivity to flow in the opposite direction. However, in a recent example, the intelligent combination of the pulsed neutron and gamma ray sensors made it possible to detect flow in both up and down directions in one single pass.\u0000 The examples in this paper demonstrate the usage of the OA continuous logs and WFL stations where pulsed neutron logging (PNL) have been run in a few wells in Malaysia. These logs have been recorded in wells with variation/complex completions ranging from single completion with gravel pack assembly to openhole completions with screens. As demonstrated in these case studies, real-time evaluation of the pulsed neutron data and logging program optimization and updates are instrumental to enable a comprehensive interpretation, from petrophysical analysis to water management, facilitating fast, informed decision making.\u0000 The novel OA curves from advanced PNL technology, complemented by other pulsed neutron borehole indicators and temperature p","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"36 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528349","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":"Successful Drilling High Pressure Well with Depleted Levels: Field Lessons from Reservoirs in Offshore Jack Up","authors":"Cesare Antoniucci, Cinzia Di Altobrando, Valeriano Gioia, Marcellino Tufo, Renzo De Blasis, Massimo Ciancaglini, Fabio Santoni","doi":"10.2523/iptc-23192-ms","DOIUrl":"https://doi.org/10.2523/iptc-23192-ms","url":null,"abstract":"\u0000 Nowadays many mature fields are drilled worldwide, alternating depleted and pressurized levels. Depletion phenomena, due to long term production, increase problems associated to all well operations such as drilling, completion and production optimization. On drilling activities events like lost circulation, stuck pipe and wellbore instability are often observed.\u0000 This paper outlines successful experience in drilling reservoir showing depleted zones (0.76 kg/cm2 /10 m) alternated with high pressure formation levels (mud weight used 1.95 kg/l) and characterized by differential pressure values (difference between hydrostatic mud pressure and pore gradient pressure) around 480 kg/cm2. Such situation creates technical challenges and requires implementation of particular drilling strategies. Experience in mature field offshore combined to innovative technologies leads to successful drilling. Operative experience, use of Eni circulating device (e-cdTM), Eni NPT predictive tool (e-nptTM), proper mud type selection and optimized drilling BHA have been key factors in achieving the desired target.\u0000 E-cdTM: is a Eni technology that allows to maintain uninterrupted flow of drilling fluid into the well while adding (or removing) joints of \"drill pipe\" to the drill string, thus avoiding severe fluctuations in annular pressure, maintaining hole stability, decreasing stress formation and the possibility of stuck pipe events. E-nptTM: is a Eni software to real time monitoring drilling parameters and predict, based on Eni case experience, phenomena of Circulation Loss, Stuck pipe or Fluid influx. Mud type selection: oil base mud to mitigate problems due to high differential pressure; high performance water base mud (polymeric inhibited and encapsulated) to avoid reservoir damage even if the differential pressure value reached would have suggested to use oil base mud. Well proved BHA design with automated rotary steerable: to produce less stress to the formation without creating instability to the hole; moreover the BHA is equipped with annulus pressure while drilling (APWD) to monitor real time annulus pressure acting against the formation during drilling and near bit resistivity to allow proper casing point identification. Operatively it has been implemented, in enlarged phases, to uniform the hole at same size to optimize cementing operation of the column\u0000 This paper presents the successful Eni district South Europe experience in drilling, with minimal NPT, high pressure well alternating pressurized and depleted levels due to many years of production. Such achievement has been obtained combining the most recent technologies, both Eni properties and not, and operative experience gained over tens of years of activity.","PeriodicalId":518539,"journal":{"name":"Day 3 Wed, February 14, 2024","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140527804","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}