玛北地区砂砾岩储层地应力方向测井识别及主控因素

doi:10.11743/ogg20150410

石油与天然气地质 ›› 2015, Vol. 36 ›› Issue (4): 605-611.doi: 10.11743/ogg20150410

玛北地区砂砾岩储层地应力方向测井识别及主控因素

付建伟¹, 李洪楠¹, 孙中春², 王贵文¹, 罗兴平²

1. 中国石油大学油气资源与探测国家重点实验室, 北京 102249;
2. 新疆油田有限责任公司勘探开发研究院, 新疆克拉玛依 834000

收稿日期:2014-04-01 修回日期:2015-06-20 出版日期:2015-08-08 发布日期:2015-08-28
作者简介:付建伟(1974—),男,副教授,测井地质。E-mail:jianweifu2003@163.com。
基金资助:
中国石油创新基金项目(2013D-5006-030)。

Logging identification and controlling factors of present stress orientations of the coarse-grained clastic reservoirs in Mabei region, Juggar Basin

Fu Jianwei¹, Li Hongnan¹, Sun Zhongchun², Wang Guiwen¹, Luo Xingping²

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

Received:2014-04-01 Revised:2015-06-20 Online:2015-08-08 Published:2015-08-28

摘要/Abstract

摘要：

准噶尔盆地玛北地区发育致密砂砾岩储层，现今地应力场方向是这类储层压裂改造等需要考虑的关键因素之一，因此开展现今应力场方位分布特征及其主控因素研究具有重要的意义。首先利用地层倾角测井仪极板位置以及微电阻率测井图像信息异常识别井轴形状，其长轴方向代表现今最小水平主应力方向，进而识别出地应力方向；其次，通过微电阻率扫描成像测井识别地应力各向异性引起的诱导缝方位，从而判断地应力方向；最后，利用偶极横波成像测井通过快慢横波速度和方位的拾取，有效识别现今水平地应力方向。在此基础上开展了研究区地应力平面分布特征及主控因素分析，结果表明，玛北地区现今最大水平主应力方向整体表现为东西向；应力场方位主要受控于古构造运动，而局部地区受到断裂活动的影响，现今水平应力场方位会发生不同程度的变化，变化程度与断裂性质、断裂规模等有关。

关键词: 地应力方向, 测井识别, 砂砾岩储层, 玛北地区, 准噶尔盆地

Abstract:

One of the challenges the operators have been facing in fracturing the tight coarse-grained clastic reservoirs in Mabei area of Juggar basin is to identify the orientation of present stress field.This has made the characterization of present stress filed orientation and its controlling factors more significant than before.The paper introduces an identification method of the orientation through 1) recognizing of well axis by locating the polar plate of dipmeter and reading micro resistivity image abnormal(the orientation of the long axis represents the direction of the minimum principle stress, which can be used to roughly indicate the orientation of in-situ stress field); 2) determining the orientation of induced fracture in the wall of boreholes by FMI firstly and then identifying the in-situ stress orientation; or 3) using dipole shear imaging log with fast-slow shear velocity and orientation pickup first and then identifying the orientation.Analyses of plane distribution and main controlling factors of stress field in the study area based on the identification shows that the present maximum horizontal principle stress in Mabei is overall in an E-W direction.The present maximum horizontal principle stress field orientations were mainly controlled by the paleotectonic movement.Faulting activities in some part of the region exerted influences over changing of the orientation of the present stress field.The extent of the change is thought to be linked to faulting features and scale.

Key words: stress orientation, logging identification, coarse-grained clastic reservoir, Mabei area, Juggar Basin

中图分类号:

TE122.1

付建伟,李洪楠,孙中春,等. 玛北地区砂砾岩储层地应力方向测井识别及主控因素[J]. 石油与天然气地质, 2015, 36(4): 605-611. doi: 10.11743/ogg20150410 Fu Jianwei,Li Hongnan,Sun Zhongchun,et al. Logging identification and controlling factors of present stress orientations of the coarse-grained clastic reservoirs in Mabei region, Juggar Basin[J]. Oil & Gas Geology, 2015, 36(4): 605-611. doi: 10.11743/ogg20150410

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玛北地区砂砾岩储层地应力方向测井识别及主控因素

Logging identification and controlling factors of present stress orientations of the coarse-grained clastic reservoirs in Mabei region, Juggar Basin

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