基于电成像测井的火山岩裂缝分布定量表征——以准噶尔盆地滴西地区石炭系为例

doi:10.7623/syxb201810005

石油学报 ›› 2018, Vol. 39 ›› Issue (10): 1130-1140.DOI: 10.7623/syxb201810005

基于电成像测井的火山岩裂缝分布定量表征——以准噶尔盆地滴西地区石炭系为例

张兆辉^1,2, 杜社宽¹, 陈华勇³, 于红果³

1. 甘肃省油气资源研究重点实验室中国科学院油气资源研究重点实验室甘肃兰州 730000;
2. 中国科学院大学北京 100049;
3. 中国石油集团西部钻探工程有限公司测井公司新疆克拉玛依 834000

收稿日期:2018-01-08 修回日期:2018-05-07 出版日期:2018-10-25 发布日期:2018-12-05
通讯作者: 张兆辉,男,1982年7月生,2005年获长江大学学士学位,现为中国科学院西北生态环境资源研究院博士研究生,主要从事储层测井评价方法研究。Email:zhangzhaohui_123@163.com
作者简介:张兆辉,男,1982年7月生,2005年获长江大学学士学位,现为中国科学院西北生态环境资源研究院博士研究生,主要从事储层测井评价方法研究。Email:zhangzhaohui_123@163.com
基金资助:
甘肃省自然科学基金项目（17JR5RA313）、中国科学院油气资源研究重点实验室开放基金项目（KFJJ2016-02）和甘肃省油气资源研究重点实验室"十三五"科技创新基金项目（135CCJJ20160524）资助。

Quantitative characterization of volcanic fracture distribution based on electrical imaging logging:a case study of Carboniferous in Dixi area,Junggar Basin

Zhang Zhaohui^1,2, Du Shekuan¹, Chen Huayong³, Yu Hongguo³

1. Key Laboratory of Petroleum Resources, Gansu Province; Key Laboratory of Petroleum Resources Research, Chinese Academy of Sciences, Gansu Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Logging Company, CNPC Xibu Drilling Engineering Company Limited, Xinjiang Karamay 834000, China

Received:2018-01-08 Revised:2018-05-07 Online:2018-10-25 Published:2018-12-05

摘要/Abstract

摘要：

火山岩油气藏与裂缝有关，利用电成像测井资料，建立了火山岩裂缝的定量表征方法，对滴西地区石炭系火山岩裂缝"点"、"线"、"面"分布规律进行了研究。利用电成像测井资料精细解释了岩性和裂缝，并确定了裂缝参数的计算方法，获得了裂缝发育程度及分布特征。研究发现，中—高角度构造缝是石炭系主要裂缝类型；基性熔岩和酸性侵入岩中裂缝发育率、裂缝层密度明显高于角砾岩和凝灰岩，是裂缝发育的主要场所；单层厚度小于15 m，裂缝易发育，呈现"单段式"发育模式，裂缝层密度大、裂缝发育率高；单层厚度大于15 m，裂缝较难发育，且集中分布在岩性体顶部和底部，呈现"三段式"或"二段式"发育模式，整体裂缝层密度小、裂缝发育率低，但局部高；风化壳可以促进紧邻岩性体中裂缝发育，改变发育模式。裂缝在纵向上主要分布在石炭系风化壳顶面以下250 m内，且向深部裂缝发育程度逐渐减小，而平面上断层附近是裂缝层密度、裂缝发育率的高值区，且沿断层呈趋势分布。

关键词: 单层岩性体, 裂缝分布, 电成像测井, 石炭系火山岩, 准噶尔盆地

Abstract:

There is certain relationship between volcanic hydrocarbon reservoirs and fractures, while fracture distribution laws are macroscopically characterized by seismic attributes. A quantitative characterization method of volcanic fractures is established on a basis of electrical imaging logging to study the "point", "linear" and "planar" distribution laws of Carboniferous volcanic fractures in Dixi area. This method is applied to perform the fine interpretation of lithology and fractures using electrical imaging logging data, define the calculation method of fracture parameters, and obtain the fracture development level and distribution characteristics. The study shows that the tectonic fractures with median-high angle are dominant in Carboniferous. Meanwhile, basic lava and acidic intrusive rocks have higher fracture development rate and density than volcanic breccia and tuff, and are the main place for the development of fractures. In case of the single-layer thickness less than 15 m, fractures are prone to develop, characterized with "single-section" development mode, large density of fracture layer and high fracture development rate. In case of the single-layer thickness greater than 15 m, fractures are difficult to develop, mainly concentrated at the top and bottom of lithological body, characterized with the "tri-section" or "bi-section" development pattern, overall small density of fracture layer, low fracture development rate and high local rate. In the meantime, the weathering crust can promote the development of fractures in the adjacent lithological body and change the development pattern. Fractures are mainly distributed vertically at the depth of 250 meters under the top of Carboniferous weathering crust; the deep fracture development degree is gradually declined. However, on the horizontal level, the vicinity of faults is the high-value zone of fracture layer density and development rate, distributed in the trend towards fault.

Key words: single-layer lithological body, fracture distribution, electrical image logging, Carboniferous volcanic, Junggar Basin

中图分类号:

TE121.1

张兆辉, 杜社宽, 陈华勇, 于红果. 基于电成像测井的火山岩裂缝分布定量表征——以准噶尔盆地滴西地区石炭系为例[J]. 石油学报, 2018, 39(10): 1130-1140.

Zhang Zhaohui, Du Shekuan, Chen Huayong, Yu Hongguo. Quantitative characterization of volcanic fracture distribution based on electrical imaging logging:a case study of Carboniferous in Dixi area,Junggar Basin[J]. Acta Petrolei Sinica, 2018, 39(10): 1130-1140.

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基于电成像测井的火山岩裂缝分布定量表征——以准噶尔盆地滴西地区石炭系为例

Quantitative characterization of volcanic fracture distribution based on electrical imaging logging:a case study of Carboniferous in Dixi area,Junggar Basin

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