小龙湾地区煤层气地质特征分析

Characteristics analysis of methane gas in Xiaolongwan area

在分析煤层含气性和煤层气可采性等地质条件的基础上 ,对小龙湾地区煤层气的开发前景进行了评价。评价结果为 :小龙湾地区下第三系沙河街组三段具有较好的成煤环境 ,煤层发育 ,厚度大 ,含气程度中等 ,孔渗条件较好 ,含气饱和度高 ,与已获工业气流的铁法大兴煤田等地区条件相似 。

Based on the analysis of geological conditions, such as coalbed gas bearing, recoverable and the etc, development prospect of methane gas in Xiaolongwan area is evaluated. And it is concluded that Sha3 formation of later Tertiary age in this area owns relatively good coal forming environment. In addition, coal bed developed features great thickness, medium gas bearing, favorable porosity and high gas saturation and possesses similar conditions with Daxing coal field in Tiefa which has achieved industrial gas flow, rich resources and development prospect.