|本期目录/Table of Contents|

[1]郭建设,周福建,胡晓玲,等.三塘湖盆地致密油水平井增能压裂力学机理[J].断块油气田,2021,(01):57-62.[doi:10.6056/dkyqt202101010]
 GUO Jianshe,ZHOU Fujian,HU Xiaoling,et al.Mechanical mechanism of horizontal well energized fracturing of tight oil in Santanghu Basin[J].Fault-Block Oil and Gas Field,2021,(01):57-62.[doi:10.6056/dkyqt202101010]
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《断块油气田》[ISSN:1005-8907/CN:41-1219/TE]

卷:
期数:
2021年01
页码:
57-62
栏目:
开发工程
出版日期:
2021-01-25

文章信息/Info

Title:
Mechanical mechanism of horizontal well energized fracturing of tight oil in Santanghu Basin
文章编号:
10
作者:
郭建设12周福建3胡晓玲4刘雄飞3王博3
1.东北石油大学石油工程学院,黑龙江 大庆 163318;2.中国石油吐哈油田分公司,新疆 哈密 838202;3.中国石油大学(北京) 非常规油气科学研究院,北京 102249;4.中国石油西部钻探工程有限公司地质研究院,新疆 克拉玛依 834000
Author(s):
GUO Jianshe12 ZHOU Fujian3 HU Xiaoling4 LIU Xiongfei3 WANG Bo3
1.Northeast Petroleum University, Daqing 163318, China; 2.Tuha Oilfield Company, PetroChina, Hami 838202, China; 3.Unconventional Petroleum Research Institute, China University of Petroleum, Beijing 102249, China; 4.Geological Research Institute of CNPC Xibu Drilling Engineering Company Limited, Karamay 834000, China
关键词:
致密油水平井重复压裂增能力学机理
Keywords:
tight oil horizontal well refracturing energization mechanical mechanism
分类号:
TE357.1
DOI:
10.6056/dkyqt202101010
文献标志码:
A
摘要:
重复压裂是三塘湖盆地油藏提高产能和采收率的必备手段。文中通过基于黏聚层单元的有限元数值模拟、室内岩石力学实验、声发射监测和岩石力学屈服破坏准则理论等手段,系统研究了该区块重复压裂改造中的增能力学机理。研究结果表明:增能压裂的核心是提升全局范围内地层孔隙压力,而暂堵转向是局部范围提升已有裂缝内的净压力,二者配合使用,使整体压力和局部净压力提升,在较大范围内激活天然裂缝系统。增能压裂的应力应变曲线特征、声发射特征呈现多次起伏波动和多次破裂特征,破裂压力相对较低。增能压裂裂缝扩展参数与地层孔隙压力提升比例、岩石力学参数及水岩相互作用时间等因素密切相关,其孔隙压力增加存在某一最优化值。
Abstract:
The refracturing stimulation is the necessary means to improve the reservoir productivity and recovery in Santanghu basin. In this paper, by means of finite element numerical simulation based on cohesive zone, the rock mechanics experiment in the laboratory, acoustic emission monitoring and the related Mohr-Coulomb yield failure criterion theory, the energized mechanical mechanism in the refracturing of this area is systematically studied. The result shows that the core of energized fracturing is to increase the pore pressure of the formation in the global scope, while the temporary plugging and diverting are to locally increase the net pressure in the existing cracks. The two methods are used together to make the overall pressure and the net pressure increased, which will activate the natural fracture system in a large range. The stress-strain curve and acoustic emission characteristics of energized fracturing show multiple fluctuations and multiple rupture characteristics, and the rupture pressure is relatively low. The parameters of crack propagation in energized fracturing are closely related to those factors such as the increase ratio of formation pore pressure, rock mechanics parameters and water-rock interaction time. There is also an optimum value for pore pressure increase.

参考文献/References:

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备注/Memo:
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更新日期/Last Update: 2021-01-25