Tapping Moveable Oil Rim in Challenging Matured Oil Field Through the Synergy Geosteering Approach

Author:

Sultanov N.1,Hendrawati M. S.1,Hardiani R.1,Buniamin N.1,Abdullah N. A.1,Alang K. A.2,Wang H.2

Affiliation:

1. PETRONAS Carigali, Kuala Lumpur, Malaysia

2. Slb, Kuala Lumpur, Malaysia

Abstract

Abstract ABC field is located in offshore Peninsula Malaysia where recently a redevelopment project was undertaken to target the unswept oil via drilling horizontal wells. Offset well’s performance suggested highly dynamic fluid contact movement with reservoir sweep being non-uniform. Fluid types were expected to have low resistivity low contrast and vertical depth uncertainty of structure adding the complexity in landing and horizontal section drilling. A multi-disciplinary approach with synergy geosteering was vital to optimize horizontal well placement. A workflow was developed which synergized subsurface and drilling scope to mitigate risks associated with the uncertainties. Geosteering pre-job model was built with multiple offset wells’ properties and range of expected fluid contacts. Post pilot hole drilling the model was updated by incorporating the actual fluid contacts and structure for an optimum drilling strategy. The structure uncertainty was further reduced with the advantage of deterministic inversion of high-definition reservoir mapping technology while drilling. Due to observed non-uniform fluid contacts away from the landing point, real-time inversion in combination with open hole logs was used in horizontal section to maintain desired stand off from both oil and gas. The high-definition reservoir scale mapping with deterministic inversion method was utilized to identify low resistivity low contrast boundaries of oil from transition zone which was challenging to be achieved by a conventional geosteering tool. The top of reservoirs mapped by geosteering were incorporated with the seismic amplitude analysis to assist in real time decision making. It was essential to ensure smooth landing point for good borehole tortuosity since the landing and horizontal section were drilled in one section. The tool clearly revealed the transition zone and Oil Water Contact (OWC) at 10-20m TVD below the bit with higher confidence compared to standard tool in horizontal section. In the lateral section, OWC and dip angle were mapped concurrently which allowed the team to achieve the required production length while maintaining standoff from the swept zone. The success of integrated subsurface workflow with synergy of geosteering proven as the ultimate solution to overcome the challenges of horizontal well placement in this field. All wells with geosteering accomplished landing at an optimum depth and planned horizontal length despite tight True Vertical Depth (TVD) window. Ultimately, wells completed and unloaded, delivering higher than the expected rates with close to zero water cut (WC).

Publisher

SPE

Reference4 articles.

1. Dong, C., Dupuis, C., Morriss, C., Legendre, E., Mirto, E., Kutiev, G., Denichou, J.-M., Viandante, M., Seydoux, J., Bennett, N., Zhu, Q., and Zhong, X., 2015, Application of automatic stochastic inversion for multilayer reservoir mapping while drilling measurements. In: International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 9–12 November 2015, SPE-177883-MS.

2. Siti Najmi Farhan Zulkipli , May SariHendrawati, Noor AzmahAbdullah, and RosidahHardiani, PETRONAS Carigali Sdn Bhd. 2023, The Guiding Principle of Well Placement to Maximize Hydrocarbon Recovery through Enhanced Reservoir Characterization and Prolific Seismic-Driven Approaches. In: SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition held in Jakarta, Indonesia, 10 – 12 October 2023, SPE-215334-MS.

3. Application of High-Definition Reservoir Scale Mapping-While-Drilling with Comprehensive Formation Evaluation in the Challenging Low Resistivity Contrast Environment;Ali,2022

4. A Novel High-Definition Inversion of Deep Directional Electromagnetic Measurements While-Drilling Enhances Layered Reservoir Mapping;Xu;Society of Petrophysicist and Well-Log Analysts,2018

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3