蜀南地区龙潭组煤层气储层特征及资源潜力

doi:10.11885/j.issn.1674-5086.2015.10.06.15

西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (1): 43-52.DOI: 10.11885/j.issn.1674-5086.2015.10.06.15

蜀南地区龙潭组煤层气储层特征及资源潜力

蒋裕强^1,2, 罗明生³, 张虎⁴, 王勇⁵, 甘辉⁴

1. 西南石油大学地球科学与技术学院, 四川成都 610500;
2. 四川省天然气地质重点实验室, 四川成都 610500;
3. 中国石油西南油气田公司蜀南气矿, 四川泸州 646000;
4. 四川省煤田地质局一三七队, 四川达州 635000;
5. 中国石油西南油气田公司川中油气矿, 四川遂宁 629000

收稿日期:2015-10-06 出版日期:2017-02-01 发布日期:2017-02-01
通讯作者: 蒋裕强,E-mail:xnsyjyq3055@126.com
作者简介:蒋裕强,1963年生,男,汉族,四川安岳人,教授,主要从事油气储层方面的研究。E-mail:xnsyjyq3055@126.com;罗明生,1985年生,男,汉族,四川泸州人,硕士研究生,主要从事地质勘探方面的研究。E-mail:snluomings@petrochina.com.cn;张虎,1986年生,男,汉族,四川内江人,硕士研究生,主要从事非常规储层方面的研究。E-mail:zhangyoyo5337@126.com;王勇,1982年生,男,汉族,四川德阳人,工程师,主要从事地质勘探方面的研究。E-mail:wy516626@petrochina.com.cn;甘辉,1989年生,女,汉族,四川广安人,硕士研究生,主要从事非常规油气地质方面的研究。E-mail:799358034@qq.com

Characteristics of CBM Reservoirs and Their Resource Potential in the Southern Sichuan Basin

JIANG Yuqiang^1,2, LUO Mingsheng³, ZHANG Hu⁴, WANG Yong⁵, GAN Hui⁴

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Provincial Key Laboratory of Natural Gas Geology, Chengdu, Sichuan 610500, China;
3. Southern Sichuan Gas Field, Southwest Oil & Gas Field Company, PetroChina, Luzhou, Sichuan 646000, China;
4. No. 137 Team, Coalfield Geology Bureau of Sichuan Province, Dazhou, Sichuan 635000, China;
5. Central Sichuan Gas Field, Southwest Oil & Gas Field Company, PetroChina, Suining, Sichuan 629000, China

Received:2015-10-06 Online:2017-02-01 Published:2017-02-01

摘要/Abstract

摘要： 据中国多次开展的煤层气资源评价结果，蜀南地区煤炭以无烟煤为主，与沁水盆地类似，其煤层变质程度高，吸附能力强，含气量高，蕴藏了大量的煤层气资源。为了进一步查明蜀南地区煤层气储层特征及其资源潜力，根据该区测井资料、录井资料、煤层气参数井资料，从煤层分布特征、煤质特征、孔-裂隙发育特征、含气性特征及等温吸附特征等方面，分析了该区煤储层特征，对储层质量进行综合评价，并在此基础上评价其资源潜力。结果表明，蜀南地区龙潭组煤变质程度高，属于无烟煤；兰氏体积大，含气量高，气体质量好，含气饱和度高，兰氏压力小，临界解吸压力小、地解比偏低。综合评价显示该区煤层气储层质量较好，资源潜力大，但开发难度较大，尚需适宜的开采技术。建议选择长宁-叙永区块开展煤层气勘探开发试验，探索煤层气勘探评价方法及有效的开采技术。

关键词: 储层特征, 资源潜力, 龙潭组, 煤层气, 蜀南地区

Abstract: According to the results of several coalbed methane(CBM) resource evaluations, the coal in the southern Sichuan Basin is mainly anthracite, similar to that of the Qinshui Basin. The coal bed in the southern Sichuan Basin contains a large amount of CBM resources due to the high degree of coal metamorphism, strong adsorption capacity, and large gas content. The CBM reservoir characteristics in the southern Sichuan Basin, such as the coal layer distribution, coal rock quality, pore-fracture features, gas content, and isothermal adsorption features of the coal beds, were analyzed and the coal reservoir quality and CBM resource potential were evaluated in this study using logging and CBM parameter well data. The results show that the regional coal development is unstable because of an overall great burial depth and high degree of coal metamorphism. The coal reservoirs have a large Langmuir volume, high gas content, good gas quality, high gas saturation, small Langmuir pressure, and small critical desorption pressure. The comprehensive evaluation shows that the CBM reservoir has a good quality and great potential; however, its development is relatively difficult. Therefore, suitable mining technology is needed. We selected the Changning-Xuyong block as the experiment area for CBM exploration and development to determine CBM evaluation methods and effective mining technologies.

Key words: reservoir characteristics, exploration potential, Longtan Formation, coalbed methane gas, Southern Sichuan Basin

中图分类号:

TE122

蒋裕强, 罗明生, 张虎, 王勇, 甘辉. 蜀南地区龙潭组煤层气储层特征及资源潜力[J]. 西南石油大学学报(自然科学版), 2017, 39(1): 43-52.

JIANG Yuqiang, LUO Mingsheng, ZHANG Hu, WANG Yong, GAN Hui. Characteristics of CBM Reservoirs and Their Resource Potential in the Southern Sichuan Basin[J]. 西南石油大学学报(自然科学版), 2017, 39(1): 43-52.

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蜀南地区龙潭组煤层气储层特征及资源潜力

Characteristics of CBM Reservoirs and Their Resource Potential in the Southern Sichuan Basin

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