Overcoming the Late-Stage Development Challenges of Bonga Turbidite Reservoirs via Geosteering Technology Deployment

T. Jenakumo, O. Adekoya, Joshua Itua, Abidemi Belgore, A. Nkanga, O. Olagunju, A. Bisain
{"title":"Overcoming the Late-Stage Development Challenges of Bonga Turbidite Reservoirs via Geosteering Technology Deployment","authors":"T. Jenakumo, O. Adekoya, Joshua Itua, Abidemi Belgore, A. Nkanga, O. Olagunju, A. Bisain","doi":"10.2118/212029-ms","DOIUrl":null,"url":null,"abstract":"\n The Bonga field is in its late stage Phase-3 development. Infill wells are drilled to target oil in the bypassed or unswept areas of the reservoirs. Unlike the earlier phases of development, the current wells have complex trajectories and are hooked up via crowded subsea manifolds. Because oflimited availability of drilling centers, most of the new wells are extended reach with narrow drilling margins.\n The target reservoirs are relatively thinner, poorly developed, and more limited in extent and size compared to targets in the earlier phases, increasing inherent subsurface uncertainties. With an expected low case ultimate recovery per well of roughly 10–15 MMstb, and average deepwater well cost of +/- $40 million, the stakes were high and hence critical to get it right the first time. If net-sand is poor or short because of suboptimal landing or well placement in the reservoir, the well objective (recovery and rate) can easily be compromised and could require drilling a sidetrack with additional attendant cost. Longer exposure length of drain hole (reservoir section) was known to improve well production rates hence an essential component of the well plan.\n To address these challenges and ensure the wells achieve their objectives and deliver their economic value, a geosteering technology (Reservoir Mapping While Drilling tool—GeoSphere) was adopted for optimal landing above the target reservoir(s) and placement within the reservoir channel sands using the Multilayer Distance to Boundary technology (PeriScopeHD). The deployment of geosteering technology was considered to be a success in enabling better sand exposures of the wells in the target sections, thus achieving the well objectives.\n This paper discusses the implementation of geosteering technology and learnings from two case studies in the Bonga infill campaign.","PeriodicalId":399294,"journal":{"name":"Day 2 Tue, August 02, 2022","volume":"268 3","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Day 2 Tue, August 02, 2022","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2118/212029-ms","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The Bonga field is in its late stage Phase-3 development. Infill wells are drilled to target oil in the bypassed or unswept areas of the reservoirs. Unlike the earlier phases of development, the current wells have complex trajectories and are hooked up via crowded subsea manifolds. Because oflimited availability of drilling centers, most of the new wells are extended reach with narrow drilling margins. The target reservoirs are relatively thinner, poorly developed, and more limited in extent and size compared to targets in the earlier phases, increasing inherent subsurface uncertainties. With an expected low case ultimate recovery per well of roughly 10–15 MMstb, and average deepwater well cost of +/- $40 million, the stakes were high and hence critical to get it right the first time. If net-sand is poor or short because of suboptimal landing or well placement in the reservoir, the well objective (recovery and rate) can easily be compromised and could require drilling a sidetrack with additional attendant cost. Longer exposure length of drain hole (reservoir section) was known to improve well production rates hence an essential component of the well plan. To address these challenges and ensure the wells achieve their objectives and deliver their economic value, a geosteering technology (Reservoir Mapping While Drilling tool—GeoSphere) was adopted for optimal landing above the target reservoir(s) and placement within the reservoir channel sands using the Multilayer Distance to Boundary technology (PeriScopeHD). The deployment of geosteering technology was considered to be a success in enabling better sand exposures of the wells in the target sections, thus achieving the well objectives. This paper discusses the implementation of geosteering technology and learnings from two case studies in the Bonga infill campaign.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
利用地质导向技术克服Bonga浊积岩油藏后期开发挑战
Bonga油田正处于第三阶段的后期开发阶段。在绕过或未波及的储层区域钻充井以寻找石油。与早期的开发阶段不同,目前的井轨迹复杂,并且通过拥挤的海底管汇连接。由于钻井中心的可用性有限,大多数新井都是大位移井,钻井余量很小。与早期阶段相比,目标储层相对较薄,发育不良,范围和尺寸更有限,增加了固有的地下不确定性。由于预计每口井的最低最终采收率约为1000万至1500万桶,而平均深水井成本为4000万美元以上,因此风险很高,因此第一次就把它做好至关重要。如果由于储层的着陆或井位不理想,净砂量很差或很短,那么井的目标(采收率和速率)很容易受到影响,可能需要钻侧钻,并带来额外的成本。众所周知,较长的泄油孔(油藏段)暴露长度可以提高油井产量,因此是井计划的重要组成部分。为了应对这些挑战,确保井实现目标并实现经济效益,采用了地质导向技术(油藏随钻测绘工具—geosphere),利用多层距离边界技术(PeriScopeHD),在目标储层上方实现最佳着陆,并在储层通道砂层内进行定位。地质导向技术的应用被认为是成功的,它使目标段的井能够更好地出砂,从而实现了井的目标。本文讨论了地质导向技术的实施,并从Bonga填充运动的两个案例研究中吸取了教训。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Application of Machine Learning Algorithm for Predicting Produced Water Under Various Operating Conditions in an Oilwell Gas Condensate Well Deliverability Model, a Field Case Study of a Niger Delta Gas Condensate Reservoir Assessment of Nigeria's Role in the Global Energy Transition d Maintaining Economic Stability Prediction of Scale Precipitation by Modelling its Thermodynamic Properties using Machine Learning Engineering Cost Optimization by Designing an Ultra-Slim Horizontal Well in the Niger Delta – The Eremor Field Case Study
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1