火山岩油藏压裂水平井应力敏感产能模型

doi:10.12108/yxyqc.20210418

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (4): 166–175.doi: 10.12108/yxyqc.20210418

火山岩油藏压裂水平井应力敏感产能模型

孔垂显¹, 巴忠臣¹, 崔志松¹, 华美瑞¹, 刘月田², 马晶²

1. 中国石油新疆油田分公司勘探开发研究院, 新疆克拉玛依 834000;
2. 中国石油大学 (北京)油气资源与探测国家重点实验室, 北京 102249

收稿日期:2020-08-25 修回日期:2020-10-18 出版日期:2021-08-01 发布日期:2021-08-06
第一作者:孔垂显(1975-),男,高级工程师,主要从事油田开发方面的研究工作。地址:(834000)新疆克拉玛依市准噶尔路32号中国石油新疆油田分公司勘探开发研究院。Email:kchuixian@petrochina.com.cn
通信作者: 刘月田(1965-),男,博士,教授、博士生导师,主要从事裂缝性油藏开发理论、方法与技术方面的研究工作。Email:lyt51@163.com。
基金资助:
中国石油重大科研专项“新疆和吐哈油田勘探开发关键技术研究与应用”课题5“火山岩油藏效益开发关键技术研究与应用”（编号：2017E-0405）资助

Stress-sensitive productivity model of fractured horizontal wells in volcanic reservoirs

KONG Chuixian¹, BA Zhongchen¹, CUI Zhisong¹, HUA Meirui¹, LIU Yuetian², MA Jing²

1. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China

Received:2020-08-25 Revised:2020-10-18 Online:2021-08-01 Published:2021-08-06

摘要/Abstract

摘要： 火山岩油藏属于双重介质油藏，油藏内部天然裂缝发育，由于储层具有应力敏感性，火山岩油藏产量受地层压力变化影响明显，且储层流体流动具有启动压力梯度现象，故目前没有适合火山岩油藏特性的产能模型。基于双重介质模型，分区（基质-裂缝区、缝网改造区、部分缝网改造区、人工裂缝区）建立了火山岩油藏压裂水平井渗流模型，通过Laplace变换、Duhamel原理和叠加原理得到了拉氏空间压裂水平井复合流动模型，利用stehfest数值反演得到了相应的压力动态响应曲线和无量纲产量曲线，并对影响产能的部分因素进行了敏感性分析。结果表明：压裂改造区的宽度和长度等主要影响中间流动阶段，未压裂改造区的宽度、长度、非达西流动和应力敏感性主要影响后期流动阶段。利用建立的复合流动模型准确地预测了无底水火山岩油藏产能，此项研究对于火山岩油藏产能计算具有一定的指导意义。

关键词: 火山岩, 复合流动模型, 产能计算, 敏感性分析

Abstract: Natural fractures are developed in the volcanic reservoirs which are dual medium. Due to the stress sensitivity of the reservoirs,the production of volcanic reservoirs is significantly affected by changes in formation pressure,and there is a threshold gradient pressure phenomenon,so there is currently no productivity model suitable for the characteristics of volcanic reservoirs. Based on the dual media model,a coupling multi-scale（matrixfracture zone,fracture network reform zone,partial fracture network reform zone,artificial fracture zone）seepage model of fractured horizontal wells in volcanic reservoir was established,which was solved by Laplace transformation,Duhamel principle and superposition principle in Lagrangian space. The corresponding pressure dynamic response curve and dimensionless production curve were obtained by Stehfest numerical inversion,and the sensitivity analysis of different influencing factors was performed. The results show that the width and length of the fractured zone mainly affect the intermediate flow stage,while the width,length,non-Darcy flow and stress sensitivity of the unfractured zone mainly affect the later flow stage. The established compound flow model can accurately predict the productivity of bottomless volcanic reservoirs. There is certain guiding significance for the calculation of productivity of volcanic reservoirs.

Key words: volcanic rock, compound flow model, production calculation, sensitivity analysis

中图分类号:

TE349

孔垂显, 巴忠臣, 崔志松, 华美瑞, 刘月田, 马晶. 火山岩油藏压裂水平井应力敏感产能模型[J]. 岩性油气藏, 2021, 33(4): 166–175.

KONG Chuixian, BA Zhongchen, CUI Zhisong, HUA Meirui, LIU Yuetian, MA Jing. Stress-sensitive productivity model of fractured horizontal wells in volcanic reservoirs[J]. Lithologic Reservoirs, 2021, 33(4): 166–175.

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火山岩油藏压裂水平井应力敏感产能模型

Stress-sensitive productivity model of fractured horizontal wells in volcanic reservoirs

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