基于常规测井和成像测井的致密储层裂缝识别方法——以准噶尔盆地吉木萨尔凹陷芦草沟组为例

doi:10.12108/yxyqc.20190309

岩性油气藏 ›› 2019, Vol. 31 ›› Issue (3): 76–85.doi: 10.12108/yxyqc.20190309

基于常规测井和成像测井的致密储层裂缝识别方法——以准噶尔盆地吉木萨尔凹陷芦草沟组为例

刘冬冬^1,2, 杨东旭^1,2, 张子亚³, 张晨^1,4, 罗群^1,2, 潘占昆^1,2, 黄治鑫^1,2

1. 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;
2. 中国石油大学(北京)非常规油气科学技术研究院, 北京 102249;
3. 中国地质调查局油气资源调查中心, 北京 100083;
4. 中国石油大学(北京)地球科学学院, 北京 102249

收稿日期:2018-10-26 修回日期:2019-01-20 出版日期:2019-05-21 发布日期:2019-05-06
作者简介:刘冬冬(1987-),男,博士,副研究员,主要从事非常规油气成藏条件及地质评价方面的研究工作。地址:(102249)北京市昌平区府学路18号。Email:liudd@cup.edu.cn。
基金资助:
国家重点基础研究发展计划“973”项目“陆相致密油甜点成因机制及精细表征”（编号：2015CB250901）及国家自然科学基金（青年基金）“天山地区上二叠统—中、下三叠统不整合类型及成因机制”（编号：41502209）联合资助

Fracture identification for tight reservoirs by conventional and imaging logging: a case study of Permian Lucaogou Formation in Jimsar Sag,Junggar Basin

LIU Dongdong^1,2, YANG Dongxu^1,2, ZHANG Ziya³, ZHANG Chen^1,4, LUO Qun^1,2, PAN Zhankun^1,2, HUANG Zhixin^1,2

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
2. Unconventional Petroleum Research Institute, China University of Petroleum(Beijing), Beijing 102249, China;
3. Oil & Gas Survey, China Geological Survey, Beijing 100029, China;
4. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China

Received:2018-10-26 Revised:2019-01-20 Online:2019-05-21 Published:2019-05-06

摘要/Abstract

摘要： 测井技术在常规储层裂缝识别和分析中应用广泛，但在致密储层裂缝识别方面应用较少。以准噶尔盆地吉木萨尔凹陷芦草沟组致密储层为研究对象，应用常规测井和成像测井方法对致密储层裂缝进行了识别和定量表征，系统总结了常规测井和成像测井裂缝的识别特征，并将上下"甜点"体裂缝发育情况进行了对比。结果显示，孔隙度测井对裂缝响应较好，电阻率测井对裂缝响应一般，岩性测井对裂缝响应最不明显；在裂缝发育较多的层段，自然伽马值多高于70 API，浅探测电阻率一般小于80 Ω·m，岩层体积密度小于2.43 g/cm³，中子孔隙度大于28%，声波时差大于246 μs/m。成像测井对不同的填充物响应特征不同，根据不同地质结构的成像测井特征，划分出块状、条带状、线状等多种成像测井模式。芦草沟组致密储层上下"甜点"体裂缝倾向分布一致、力学成因相似、相对线密度相差不大，但下"甜点"体裂缝宽度较大，部分层段裂缝集中程度相对较高，该认识对于致密储层裂缝的测井识别和定量评价具有重要意义。

关键词: 常规测井, 成像测井, 裂缝识别, 致密储层, 芦草沟组, 准噶尔盆地

Abstract: Well logging is widely used in identifying fractures in conventional reservoirs. However, this approach is rarely used in analyzing fractures in tight reservoirs. The fractures in the tight reservoir of Lucaogou Formation in Jimusar Sag were identified and quantitatively characterized by conventional logging and imaging logging methods, the response characteristics of conventional logging to fractures were systematically summarized, the fracture genesis were analyzed by using imaging logging data, and the development of the upper and lower sweet spots were compared. The results show that the conventional porosity logging is most applicable for identifying natural fractures in tight reservoirs, resistivity logging is also usable, and lithologic logging is poorly effective. In fracture developed zones, the natural gamma value is more than 70 API, the shallow resistivity is generally less than 80 Ω·m, the volume density of rock is less than 2.43 g/cm³, the neutron porosity is more than 28%, and the acoustic acoustic moveout is more than 246 μs/m. The imaging logging has different response characteristics to different fillers. According to the different imaging logging characteristics, the block, strip, linear and other imaging logging models were proposed. The natural fractures in the upper and lower sweet spots have similar dip direction, mechanical origin, and total linear density, though the fractures in the lower sweet spot display relatively larger width and develop more concentrated. These results are of great significance for the identification and evaluation of natural fractures in tight reservoirs.

Key words: conventional logging, imaging logging, identification of fractures, tight reservoirs, Lucaogou Formation, Junggar Basin

中图分类号:

P631.8+4

刘冬冬, 杨东旭, 张子亚, 张晨, 罗群, 潘占昆, 黄治鑫. 基于常规测井和成像测井的致密储层裂缝识别方法——以准噶尔盆地吉木萨尔凹陷芦草沟组为例[J]. 岩性油气藏, 2019, 31(3): 76–85.

LIU Dongdong, YANG Dongxu, ZHANG Ziya, ZHANG Chen, LUO Qun, PAN Zhankun, HUANG Zhixin. Fracture identification for tight reservoirs by conventional and imaging logging: a case study of Permian Lucaogou Formation in Jimsar Sag,Junggar Basin[J]. Lithologic Reservoirs, 2019, 31(3): 76–85.

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基于常规测井和成像测井的致密储层裂缝识别方法——以准噶尔盆地吉木萨尔凹陷芦草沟组为例

Fracture identification for tight reservoirs by conventional and imaging logging: a case study of Permian Lucaogou Formation in Jimsar Sag,Junggar Basin

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