All Days Pub Date : 2024-05-21 DOI: 10.2118/220598-ms

Ahmed Ghaffar, Fayez R. Alenizi

{"title":"Advancement in Casing Leak Repairs and Scab-Off to Restore Well Integrity Through Data Management Techniques","authors":"Ahmed Ghaffar, Fayez R. Alenizi","doi":"10.2118/220598-ms","DOIUrl":"https://doi.org/10.2118/220598-ms","url":null,"abstract":"\u0000 This paper addresses the data management techniques used to identify the optimum casing leak repair methods in Field-A for different leak intensities and scab-off strategies to isolate the leak intervals and restore well integrity. Casing leaks are one of the major well integrity failures which require well intervention to repair and restore production. There are several factors associated to develop a casing leak which include internal wear due to subsequent drilling after setting the casing, exposure to severely corrosive environments specially across poorly cemented intervals, casing metallurgy and design, cementing practices and in some cases due to casing threads damage.\u0000 Casing leaks are categorized based on the leak intensity, which is measured by the injectivity rate when casing is pressure tested. For this paper, data evaluation techniques were utilized to evaluate different repair methods in the categories of low and high injectivity leaks. The optimum setting depth of cement retainers above the leak zone is also discussed for different casing sizes along with the recommended cement volume to over displace below the cement retainers, and to re-utilize them for subsequent squeeze attempts in case lockup squeeze pressure is not achieved in the first attempt. Comparative analysis of cement versus solids free resins to squeeze low injectivity leaks are also discussed in this paper.\u0000 The accumulation of comprehensive historical casing leak repair data and arrangement of this data to evaluate the outcome in a quantitative manner results in identifying the best methods and procedures to cure casing leaks in different downhole environments. This data management technique will further optimize the repair operation with the inclusion of additional casing leaks data, and will optimize the time and cost spent in repairing the casing leaks and scabbing-off.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"11 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117699","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}

引用次数: 0

Geomechanical Characterization of the Broom Creek Reservoir for Geologic Carbon Storage in the Williston Basin, North Dakota, U.S. 美国北达科他州威利斯顿盆地 Broom Creek 水库地质碳储存的地质力学特征描述

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0042

Omar Bakelli, Ting Xiao, Brian McPherson, Mohamed Zinelabidine Doghmane

{"title":"Geomechanical Characterization of the Broom Creek Reservoir for Geologic Carbon Storage in the Williston Basin, North Dakota, U.S.","authors":"Omar Bakelli, Ting Xiao, Brian McPherson, Mohamed Zinelabidine Doghmane","doi":"10.56952/igs-2023-0042","DOIUrl":"https://doi.org/10.56952/igs-2023-0042","url":null,"abstract":"The research examines geological carbon dioxide (CO2) sequestration in North Dakota's Broom Creek Formation, situated within the Williston Basin, as a method to reduce greenhouse gas emissions mainly from fossil fuel-based electricity production. Part of the Permian Minnelusa Group's upper unit, the Broom Creek Formation consists of sandstone interspersed with layers of dolostone and anhydrite. The study provides a thorough analysis that encompasses lithology, petrophysical properties, mineralogy, and geomechanics, assessing both storage potential and seal integrity. Particular attention is given to geomechanical characteristics such as permeability, porosity, resilience, and in-situ stress conditions to evaluate the formation's suitability for geological carbon dioxide storage. Using well-log data and geomechanical modeling, the investigation reveals the reservoir's heterogeneous nature. The findings affirm the structural integrity of the formation, indicating that it can securely store CO2 while presenting minimal seismic risk. This study significantly bolsters ongoing efforts in geological carbon storage strategies and recommends future research to explore the reservoir's long-term response to CO2 injection using advanced modeling techniques and additional field data.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139309677","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}

引用次数: 0

Fracture Propagation-Rate and Fracture Half-Length Estimated for an Individual Fracturing Stage Using Dynamic Balancing of Fluid Pressures: Eagle Ford Case Study 利用流体压力动态平衡估算单个压裂阶段的裂缝扩展速率和裂缝半长：伊格尔福特案例研究

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0176

A. Oshaish, Ruud Weijermars

{"title":"Fracture Propagation-Rate and Fracture Half-Length Estimated for an Individual Fracturing Stage Using Dynamic Balancing of Fluid Pressures: Eagle Ford Case Study","authors":"A. Oshaish, Ruud Weijermars","doi":"10.56952/igs-2023-0176","DOIUrl":"https://doi.org/10.56952/igs-2023-0176","url":null,"abstract":"This study presents a new analytical model for determining the growth-rate of hydraulic fractures during the pumping of a fracturing stage. Unlike existing commercial and numerical tools for final fracture half-length estimation, the present model is able to accommodate time-dependent parameters used in actual field operations and shows how this controls the stepwise evolution of fracture half-length over the duration of the stage treatment. The model analyzes the pressure gains and losses across the well system during the fracturing treatment operation, which solves for the Sneddon pressure used subsequently to estimate the extent and rate of the hydraulic fracture growth from the perforation clusters outward until the ultimate half-length is established. Using a practical spreadsheet template, the pressure balance model accounts for all the pressure gains and losses occurring during a typical hydraulic fracturing job. The model revealed practical results and reasonable values for the fracture half-length, in close agreement with independent estimations of fracture half-length for the same Eagle Ford well. The average propagation rate of a planar fracture, with an elliptical cross-section (in map view) of 1.8 mm width for the minor axis and fixed height of 100 ft, is 1.54 ft/min (0.026 ft/s), with high and low rates ranging between 2.81 and 0.220 ft/min. The final hydraulic fracture half-length at the end of the fracturing job was 212 ft. However, the effectively propped fracture half-length determined in independent studies using production analysis is somewhat smaller (144 ft), which indicates that the tip-end of the final fracture (212-144 ft= 68 ft) was not effectively propped, and effectively closed after the treatment.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"239 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139310631","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}

引用次数: 0

Selecting Hydraulic Fracturing Method for Wells Landed in Deep and Tight Gas Reservoirs 为深层致密气藏油井选择水力压裂方法

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0003

K. Xia, T. Mahood, S. Hassani

{"title":"Selecting Hydraulic Fracturing Method for Wells Landed in Deep and Tight Gas Reservoirs","authors":"K. Xia, T. Mahood, S. Hassani","doi":"10.56952/igs-2023-0003","DOIUrl":"https://doi.org/10.56952/igs-2023-0003","url":null,"abstract":"Many deep and tight gas reservoirs require hydraulic fracturing treatment to boost production, even though they are naturally fractured to some extent. In the oil and gas industry, different fracturing methods are generally used, which are named cased hole/clustered-perforation fracturing and openhole multistage stimulation methods. In practice, how to select the right fracturing method for a well landed in deep and tight reservoirs has rarely been discussed. Both fracturing methods can fail for deep and tight reservoirs, which leads to poor production performance. To solve this issue, a novel geomechanics workflow and some criteria are presented that can be used to select the right fracturing method for wells landed in deep and tight reservoirs. The key components of the novel geomechanics workflow will be briefly introduced, such as natural fractures prediction, a framework for calculating the breakdown pressure envelope and optimal perforation direction, 3D modeling of hydraulic fracture-natural fracture interaction, and fully coupled poroelastic model for openhole multistage fluid injection. The interactions between discrete natural fractures (NF) and propagating hydraulic fractures (HF) will be investigated through some modeling studies, which can exhibit the possible impact of natural fractures on hydraulic fractures propagation. Both advantages and disadvantages of the natural fractures’ role can be objectively visualized based on the resultant fracture network. Some guidelines for both openhole MSF (multistage fracturing) and cased hole perforation hydraulic fracturing treatment are also given in this paper.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139310651","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}

引用次数: 0

An Assessment of Wellbore Integrity During the Planned Injection of CO2 Within a Depleted Reservoir Through Numerical Analyses 通过数值分析评估计划向枯竭储层注入二氧化碳期间的井筒完整性

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0237

K. Adisornsupawat, D. Press, K. Fischer, C. P. Tan

{"title":"An Assessment of Wellbore Integrity During the Planned Injection of CO2 Within a Depleted Reservoir Through Numerical Analyses","authors":"K. Adisornsupawat, D. Press, K. Fischer, C. P. Tan","doi":"10.56952/igs-2023-0237","DOIUrl":"https://doi.org/10.56952/igs-2023-0237","url":null,"abstract":"Geomechanics workflows are being increasingly utilized within the industry to assess the risks associated with oil and gas recovery during depletion, including well integrity issues due to reservoir compaction and possible fault reactivation as reservoir pressures decline over the lifecycle of the field. However, little work has been conducted on the feasibility of utilizing existing production wells for the safe injection of CO2 as part of a carbon capture and storage (CCS) project. Field-wide 3D analyses conducted to date have taken a macroscopic view in terms of reservoir performance, but little work has been conducted at the wellbore centric scale. For the cases where a depleted field is being considered for long-term CO2 containment, it is vital that the effects of temperature are included in the reservoir flow model. Injected CO2 can be many hundreds of degrees cooler than the in-situ reservoir rock formations and exposure to these cooler temperatures will induce sudden deformations in the vicinity of the injector well. As the temperature front progresses into the reservoir, cap-rock integrity may be breached due to reductions in effective stress, in addition to the possible creation of tensile fractures. The resulting stress changes due to thermal diffusion may also have a significant effect on the wellbore architecture itself, as the cooling formation will exert tensile strains on the wellbore casing and surrounding cement. This study examines the effects of injecting cool CO2 into a relatively deep, thermally active reservoir, on the wellbore architecture and whether the induced strains in the reservoir formation arising from both increases in pressure and reductions in temperature can be safely withstood.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139311000","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}

引用次数: 0

Solid Production Prediction in Weak Sandstone Formation Using Finite Element Modeling (FEM) Approaches 利用有限元建模 (FEM) 方法预测弱砂岩地层的固体产量

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0130

Osman Hamid, R. Alfaraj

引用次数: 0

Fractures Propagation Feature of Multi-Cluster Fracturing on Deep Laminated Shale Oil Reservoir 深层层状页岩油藏多簇压裂的裂缝扩展特征

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0445

Jiaxin Lv, Bing Hou

{"title":"Fractures Propagation Feature of Multi-Cluster Fracturing on Deep Laminated Shale Oil Reservoir","authors":"Jiaxin Lv, Bing Hou","doi":"10.56952/igs-2023-0445","DOIUrl":"https://doi.org/10.56952/igs-2023-0445","url":null,"abstract":"In order to improve the production efficiency of oil and gas in the Sichuan Basin, it is necessary to study the propagation behavior of hydraulic fractures in the deep laminated continental shale oil reservoir. This study used the cohesive zone method to establish a numerical model for multi-fracture propagation in deep laminated shale oil reservoirs. Parameters such as cluster spacing and pump rate injection mode were taken into account. Through analysis of pore pressure and fracture width data, the feature of multi-fracture propagation in multi-cluster fracturing is revealed. The simulation results demonstrated that smaller cluster spacing exacerbates the uneven distribution of fracturing fluid flow between clusters, leading to increased competition and propagation of inter-cluster fractures, most transverse fractures were unable to fully propagate. Moreover, when the pump rate is low, lamina are easily activated. With pump rate increasing, hydraulic fractures tend to branch along microfractures surrounding the lamina, activating multiple layers. In the deep laminated continental shale reservoir, 8m cluster spacing and faster liquid injection rate are recommended as it effectively increase the probability of the main fracture penetrating the interlayer and effectively stimulate reservoir.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139311425","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}

引用次数: 0

Modeling Horseshoe Wells Performance in Unconventional Plays 非常规油藏马蹄形井性能建模

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0049

A. Merzoug, A. Dehdouh, H. Ouadi, Y. Alghawi

{"title":"Modeling Horseshoe Wells Performance in Unconventional Plays","authors":"A. Merzoug, A. Dehdouh, H. Ouadi, Y. Alghawi","doi":"10.56952/igs-2023-0049","DOIUrl":"https://doi.org/10.56952/igs-2023-0049","url":null,"abstract":"The development of unconventional plays often presents unique challenges, such as drilling through overpressured zones with narrow mud windows. A prime example is the Inyan Kara formation in the Bakken, where operators have had to add additional casing to drill safely, incurring extra costs of approximately half a million dollars per well. In the Permian Basin, a different challenge arises due to lease constraints, which limit drilling to a square mile, resulting in horizontal wells with short laterals of 5,000 ft. To mitigate these issues, novel drilling techniques have been adopted, such as the U-shape well design first implemented by Shell in 2019. This design, featuring one vertical section and two laterals connected by a U-turn, has been increasingly utilized to reduce risks associated with drilling in shallow formations while allowing for extended lateral lengths of up to 12,000 ft. However, a comprehensive evaluation of the performance of these wells has been lacking in the literature. This study presents a numerical modeling analysis of U-shape wells, using a well-calibrated model of the Bakken formation. The model, built on a fully coupled physics-based simulator, incorporates reservoir, fractures, and wellbore data, enabling a nuanced understanding of multiphase flow and pressure losses. The study compares the performance of U-shape wells with conventional wells in unconventional plays over a 30-year period, considering total oil production. The results indicate that U-shape wells, on average, have longer fracture lengths towards unstimulated regions compared to two horizontal wells, due to the dissipation of stress shadow when moving from heel to toe. This effect enhances the performance of U-shape wells. Furthermore, when comparing two U-shape wells with four conventional wells, the performance was found to be similar. This study provides valuable insights into the potential of U-shape wells as a viable solution for drilling in unconventional plays.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139309821","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}

引用次数: 0

Estimation of the Mechanical Parameters of a Mining Rock Mass Based on Resistivity Detection 基于电阻率检测的采矿岩体力学参数估计

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0058

Chao Wang, Hongze Li, Yujie Zhang, Jili Feng

{"title":"Estimation of the Mechanical Parameters of a Mining Rock Mass Based on Resistivity Detection","authors":"Chao Wang, Hongze Li, Yujie Zhang, Jili Feng","doi":"10.56952/igs-2023-0058","DOIUrl":"https://doi.org/10.56952/igs-2023-0058","url":null,"abstract":"In this paper, resistivity is employed to estimate the mechanical parameters of disturbed rock masses. The relation between resistivity and mechanical parameters is clarified by the damage variables based on resistivity and the interrelation among logging physical parameters. Such a relation is further mathematically expressed and verified by experiments and numerical simulations. To apply the proposed method for the stability evaluation of coal mine goaf sites, a calculation framework for the mechanical parameters of the mining rock mass is developed. Based on this framework, the in situ overburden mechanical parameters are obtained by resistivity detection, while the stability evaluation of abandoned goaf sites is performed together with FLAC3D. The results show that there is a reasonable relation between the mechanical parameters of the rock mass and resistivity, which is a linear negative relation between the mechanical parameters and the resistivity proportional coefficient. The goaf site is stable through both numerical results and in situ monitoring data. Additionally, it is demonstrated that the proposed method to calculate mechanical parameters by resistivity is of paramount significance to rock mass engineering.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139309928","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}

引用次数: 0

The Temperature Effect on Fracture Gradient in Well Containment Analysis 油井封隔分析中温度对压裂梯度的影响

All Days Pub Date : 2023-10-30 DOI: 10.56952/igs-2023-0264

B. Souza, C. O. Souza, F. Cutrim, R. Q. Velloso, S. Fontoura, C.J.C. Gonçalves

{"title":"The Temperature Effect on Fracture Gradient in Well Containment Analysis","authors":"B. Souza, C. O. Souza, F. Cutrim, R. Q. Velloso, S. Fontoura, C.J.C. Gonçalves","doi":"10.56952/igs-2023-0264","DOIUrl":"https://doi.org/10.56952/igs-2023-0264","url":null,"abstract":"The fracture pressure of a rock in deepwater wells plays a crucial role in well design in several aspects, such as the upper limit of the operational window to avoid loss circulation events during drilling and cementing, pressure relief in confined annuli, and input for hydraulic fracturing projects for stimulation. In such situations, temperature variations are generally low and have little impact. However, in a worst-case discharge scenario, the temperatures involved are considerably higher. This study aims to evaluate the increase in fracture gradient with uncontrolled well production and its subsequent shut-in. Under such circumstances, a potential well fracture can propagate to the seabed, resulting in oil leakage into the environment. After closure, the well will return to geothermal conditions, resulting in a reduction in the fracture gradient. A case study of an exploratory well was conducted, where the fracture pressure was calculated with well heating. A transient analysis of cooling after closure showed that the time required for relief well construction is shorter than the estimated time for a fracture caused by produced fluid.","PeriodicalId":433009,"journal":{"name":"All Days","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139310142","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}

引用次数: 0

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