渤海湾盆地高尚堡深层低渗透断块油藏缝网系统及其主控因素

doi:10.11743/ogg20200310

石油与天然气地质 ›› 2020, Vol. 41 ›› Issue (3): 534-542,626.doi: 10.11743/ogg20200310

渤海湾盆地高尚堡深层低渗透断块油藏缝网系统及其主控因素

王兆生^1,2, 董少群^1,3, 孟宁宁², 刘道杰⁴, 高微⁵

1. 中国石油大学(北京)地球科学学院, 北京 102249;
2. 华北理工大学矿业工程学院, 河北唐山 063210;
3. 中国石油大学(北京)理学院, 北京 102249;
4. 中国石油冀东油田分公司, 河北唐山 063000;
5. 中国石油大庆油田有限责任公司第六采油厂, 黑龙江大庆 163114

收稿日期:2019-07-20 修回日期:2020-04-07 出版日期:2020-06-28 发布日期:2020-06-16
第一作者简介:王兆生(1983-),男,博士、讲师,油气田开发地质。E-mail:zhaoshengw@126.com。
基金项目:
国家科技重大专项（2017ZX05009001-002）；油气资源与探测国家重点实验室开放基金项目（PRP/open-1607）；华北理工大学青年基金项目（Z201307）。

Fracture network in the low-permeability fault block reservoirs in deep-buried Gaoshangpu oilfield,Bohai Bay Basin,and its controlling factors

Wang Zhaosheng^1,2, Dong Shaoqun^1,3, Meng Ningning², Liu Daojie⁴, Gao Wei⁵

1. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
2. College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei 063210, China;
3. College of Sciences, China University of Petroleum(Beijing), Beijing 102249, China;
4. Jidong Oilfield Co. Ltd., CNPC, Tangshan, Hebei 063000, China;
5. No.6 Oil Production Plant of Daqing Oilfield Co. Ltd., CNPC, Daqing, Heilongjiang 163114, China

Received:2019-07-20 Revised:2020-04-07 Online:2020-06-28 Published:2020-06-16

摘要/Abstract

摘要： 渤海湾盆地高尚堡深层低渗透断块油藏油气资源丰富，储层实施压裂后，人工裂缝与天然裂缝构成的缝网系统控制着油藏的渗流。开展缝网系统及其主控因素分析，对于油藏压裂方案制定和开发效果提升具有重要意义。综合应用岩心、成像测井、地层倾角测井和微地震监测等资料，分析了高尚堡深层低渗透断块油藏天然裂缝、人工裂缝和地应力的发育特征，揭示了研究区缝网系统的分布模式和主控因素。结果表明：研究区天然裂缝较为发育，高角度构造剪切裂缝是其主要类型。裂缝在古近纪和新近纪末期两期构造作用下形成。发育有NEE-SWW向、NW-SE向和近EW向3组裂缝，其中以NEE-SWW向裂缝最为发育。现今最大水平主应力优势方位为N75°~85°E，受现今地应力影响，NEE-SWW向天然裂缝开度大，是油藏渗流的优势方位。人工裂缝近似为垂直缝，延伸的优势方位为N80°~90°E，平均缝长136 m，平均缝高17.4 m。高尚堡深层断块油藏缝网系统的分布模式受控于人工裂缝与地应力和天然裂缝的耦合关系，缝网系统的主要控制因素是天然裂缝、地应力和断层。

关键词: 主控因素, 缝网系统, 断块油藏, 高尚堡深层, 渤海湾盆地

Abstract: The deep-buried,low-permeability fault block reservoir has considerable petroleum resource potential in Gao-shangpu oilfield,Bohai Bay Basin.The fracture network composed of hydraulic fractures and natural fractures controls the seepage performance of reservoirs after hydraulic fracturing.Analysis of the fracture network and its controlling factors is of great significance to developing the reservoir fracturing scheme and improving the development performance.In the study,an integration of core observation,imaging logging,stratigraphic dip logging and micro seismic monitoring data is applied to describe the development characteristics of natural and hydraulic fractures,as well in-situ stress,and to reveal the distribution pattern and major controlling factors of the fracture network in the study area.Results show that the reservoirs herein feature well developed natural fractures with high-angle shear fractures as the primary type,and the natural fractures were mainly developed under tectonic events during the Paleogene and the Late Neogene.The fractures therein can be divided into 3 groups,striking to NEE-SWW,NW-SE and near E-W respectively,with the first group,NEE-SWW-striking fractures being dominant.The dominant direction of maximum horizontal principal stress is N75°-85°E at present.Consequently,the NEE-SWW-trending natural fractures have the biggest aperture and the highest permeability under in-situ stress,acting as the main seepage channels.Hydraulic fractures are approximately vertical,with a primary orientation of N80°-90°E,as well as an average length and height of 136 m and 17.4 m,respectively.The distribution pattern of fracture network in the deep-buried fault block reservoir in Gaoshangpu oilfield is controlled by the coupling of hydraulic fractures with in-situ stress and natural fractures,while the controlling factors of fracture network growth are natural fractures,in-situ stress,and faults.

Key words: in-situ stress, fracture, fracture network, fault block reservoir, deep-buried Gaoshangpu oilfield, Bohai Bay Basin

中图分类号:

TE122.2

王兆生,董少群,孟宁宁,等. 渤海湾盆地高尚堡深层低渗透断块油藏缝网系统及其主控因素[J]. 石油与天然气地质, 2020, 41(3): 534-542,626. doi: 10.11743/ogg20200310 Wang Zhaosheng,Dong Shaoqun,Meng Ningning,et al. Fracture network in the low-permeability fault block reservoirs in deep-buried Gaoshangpu oilfield,Bohai Bay Basin,and its controlling factors[J]. Oil & Gas Geology, 2020, 41(3): 534-542,626. doi: 10.11743/ogg20200310

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渤海湾盆地高尚堡深层低渗透断块油藏缝网系统及其主控因素

Fracture network in the low-permeability fault block reservoirs in deep-buried Gaoshangpu oilfield,Bohai Bay Basin,and its controlling factors

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