Analysis on the Main Influential Factors of Post-steam In-situ Combustion Performance in Heavy Oil Reservoir

IF 0.6 4区 工程技术 Q4 ENERGY & FUELS
Fang Zhao, Changfeng Xi, Xialin Zhang, X. Shi, Fengxiang Yang, Hetaer Mu, Wenlong Guan, Hongzhuang Wang, Hongbin Zhan, T. Babadagli, H. Li
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引用次数: 1

Abstract

We systematically studied the influential factors of post-steam in-situ combustion (ISC) project conducted in complex heavy oil reservoir in China using laboratory one-dimensional combustion experiments, reservoir simulation outputs, and data collected from the field application. The ISC project showed vastly different production performances in different regions of the field and two types of representative factors which acts on the whole ISC production stages were identified. As for a post-steam ISC process, oil viscosity and the pre-ISC recovery factor are the main reservoir parameters affecting the performance of ISC process and numerical model reflecting these two factors were established to analysis the production characteristics of producers. Type I group has a low oil viscosity ( < 8000 mPa s) and a high steam-flooded recovery factor ( > 30 %); after ISC treatment, these producers show a high initial water cut, while some experience channeling issues and hence produce a large quantity of flue gas. Type II group has a high oil viscosity ( > 20,000 mPa s) and a low cyclic steam stimulation (CSS) recovery factor (15-20 %); these producers have a high air injection pressure exceeding the fracture pressure. Results show that corresponding remedial methods applied to these two well groups can effectively enhanced oil recovery.
稠油油藏蒸汽后原位燃烧性能主要影响因素分析
通过室内一维燃烧实验、油藏模拟输出和现场应用数据,系统研究了中国复杂稠油油藏蒸汽后原位燃烧(ISC)项目的影响因素。ISC项目在油田不同区域的生产表现差异很大,并确定了影响整个ISC生产阶段的两类代表性因素。对于蒸汽后ISC过程,原油粘度和ISC前采收率是影响ISC过程性能的主要储层参数,建立了反映这两个因素的数值模型,分析了采油者的生产特征。ⅰ型油粘度低(< 8000mpa s),蒸汽驱采收率高(> 30%);经过ISC处理后,这些生产者显示出较高的初始含水率,而一些生产者则出现窜道问题,因此产生大量烟气。II型组具有高油粘度(> 20,000 mPa s)和低循环蒸汽吞吐(CSS)采收率(15- 20%);这些生产商的注气压力高于压裂压力。结果表明,对两井组采取相应的补救措施,可有效提高采收率。
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来源期刊
Journal of The Japan Petroleum Institute
Journal of The Japan Petroleum Institute 工程技术-工程:石油
CiteScore
1.70
自引率
10.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: “Journal of the Japan Petroleum Institute”publishes articles on petroleum exploration, petroleum refining, petrochemicals and relevant subjects (such as natural gas, coal and so on). Papers published in this journal are also put out as the electronic journal editions on the web. Topics may range from fundamentals to applications. The latter may deal with a variety of subjects, such as: case studies in the development of oil fields, design and operational data of industrial processes, performances of commercial products and others
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