A calculation method of the stimulated reservoir volume based on octree and its engineering application

被引：0
|
作者：
Liu X. [1 ,2 ]
Jin Y. [1 ,2 ]
Lin B. [1 ,2 ]
Lin C. [3 ]
Xie L. [3 ]
机构：
[1] College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing
[2] State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing
[3] Research Institute of Petroleum Exploration and Development of Qinghai Oilfield Company, Jiuquan, 736200, Gansu
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2019年 / 38卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Hydraulic fracturing; Microseismic monitoring; Octree method; Petroleum engineering; Stimulated reservoir volume(SRV);
D O I：
10.13722/j.cnki.jrme.2018.1067
中图分类号：
学科分类号：
摘要：
There exists a large error in conventional stimulated reservoir volume (SRV) calculation method which adopts relatively regular shapes to build 3D envelop. An integrated methodology that utilizes the octree method to generate irregular tree mesh structure according to the density of microseismic events was presented, in which the stimulated reservoir volume is obtained by summing up the volumes of non-empty nodes in the tree structure. The method was validated by analog events generated by Monte Carlo simulation and application of eighteen wells of Kunbei oilfield. It was found that the octree method can be used to envelop the event cloud perfectly and eliminate effectively enough the error of unresponsive zones during microseismic monitoring. The octree method fully considers the impact of event density on SRV calculation in different monitoring areas and determines hierarchies of tree structure according to local event density. Hence, the calculation result conforms to engineering knowledge. Engineering applications show that the method has a high computational efficiency for large scale microseismic data, and that the calculated SRVs are consisted with the daily liquid production of 18 wells in Kunbei oilfield. Compared with the conventional approach, the developed method provides a more reliable quantitative index for hydraulic fracturing evaluation. © 2019, Science Press. All right reserved.
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页码：948 / 955
页数：7
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