渝东南龙马溪组页岩气储层物性特征

陈乔; 谭彦虎; 王莉莎; 王森; 廖开贵; 刘洪; 姚光华; 王其军; 杨波

doi:10.3981/j.issn.1000-7857.2013.36.001

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科技导报 ›› 2013, Vol. 31 ›› Issue (36) : 15-19. DOI: 10.3981/j.issn.1000-7857.2013.36.001

研究论文

渝东南龙马溪组页岩气储层物性特征

作者信息 -

1. 中国科学院重庆绿色智能技术研究院, 重庆 401122;
2. 重庆地质矿产研究院, 重庆 400042;
3. 重庆矿产资源开发有限公司, 重庆 400042;
4. 西南石油大学石油工程学院, 成都 610500;
5. 中国石化西南油气分公司工程监督中心, 四川德阳 618000

作者简介:

陈乔，博士，助理研究员，研究方向为页岩气勘探开发基础理论，电子信箱：chenqiao@cigit.ac.cn

Reservoir Physical Characteristics of Shale Gas in Longmaxi Formation in Southeastern Chongqing

Author information -

1. Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, China;
2. Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China;
3. Chongqing Mineral Resources Development Co. Ltd, Chongqing 400042, China;
4. School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China;
5. Engineering Supervision Center of Southwest Branch Co., China Petrochemical，Deyang 618000, Sichuan Province, China

摘要

页岩气储层的物性特征是决定页岩气开发方案的重要因素。通过对渝东南下志留统龙马溪组页岩露头岩心的实验测试，研究了渝东南地区页岩气储层的物性特征。结果表明，渝东南龙马溪组页岩地层为层理发育，频散现象明显，但随着层理倾角的逐渐增加，波速整体呈下降趋势；页岩的孔隙度变化范围为1.5%～2.5%，渗透率变化范围为2.5×10^-4～1.3×10^-3mD，孔径分布以中孔隙为主，大孔隙较少，基本上没有微孔隙，毛管力较大；页岩的石英含量高，黏土含量低，为硬脆性页岩，脆性参数为0.49～0.77，平均为0.58；黏土成分以伊利石为主，含少量绿泥石和伊/蒙混层，不含蒙脱石，膨胀性能弱。研究结果为渝东南地区页岩气储层的开采方式选择、失稳机理分析以及压裂液方案设计提供了依据。

Abstract

The physical experiments on the shale outcrop core in the Longmaxi formation in southeastern Chongqing show that the Porosity variation is in the range of 1.5%~2.5%, the permeability is in the range of 2.5×10^-4～1.3×10^-3mD; the Shale beddings and the dispersion phenomenon are clearly seen, but their extents gradually increase with the angle of bedding, and the wave velocity decreases. The pore size distribution is changed, with less large pores, basically with no micro pore, and with a large capillary force. The rock quartz content is high, the clay content is relatively low, as typical of the hard brittle shale. At the same time, the clay is dominated by illite, with a small amount of chlorite and illite/smectite mixed layer, not including montmorillonite, the expansion extent is small, the brittle shale parameters are between 0.49～0.77, the average value is 0.58. Test results provide some guidance for the shale mining method selection, the instability mechanism and the fracturing fluid design scheme in the shale gas development in the region.

导出引用

陈乔, 谭彦虎, 王莉莎, 王森, 廖开贵, 刘洪, 姚光华, 王其军, 杨波. 渝东南龙马溪组页岩气储层物性特征[J]. 科技导报, 2013, 31(36): 15-19 https://doi.org/10.3981/j.issn.1000-7857.2013.36.001

CHEN Qiao, TAN Yanhu, WANG Lisha, WANG Sen, LIAO Kaigui, LIU Hong, YAO Guanghua, WANG Qijun, YANG Bo. Reservoir Physical Characteristics of Shale Gas in Longmaxi Formation in Southeastern Chongqing[J]. Science & Technology Review, 2013, 31(36): 15-19 https://doi.org/10.3981/j.issn.1000-7857.2013.36.001

中图分类号： P534

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