基于干扰试井的煤层气储层优势渗流方向研究

Study on coalbed methane reservoir dominant flow direction based on interference well test

为获得晋城矿区某区块3号煤层的储层连通性及其优势渗流方向,为矿区煤层气规模开发方案制定与调整提供依据,利用干扰试井技术对该区块井网内的煤层气井进行井间干扰测试。选定一口井为激动井,其周围5口井为观测井,组成干扰试井测试井组,测试并分析煤层气储层的连通性及其优势渗流方向。结果表明:激动井W-160井与观测井W-156井、W-166井间的煤层气储层连通性,优于其与观测井W-161井、W-157井以及W-164井间的储层连通性,即该区块煤层气储层的优势渗流方向为NE—SW向。将测试成果与生产实际相比对,验证了其正确性。试验证明了干扰试井测试可有效识别煤层气储层的连通性及优势渗流方向。

In order to obtain reservoir connectivity and dominant flow direction of seam 3 and provide the gist for the designing and adjusting of the large-scale coalbed methane development program, the interference well test was implemented in Jincheng mining area. One well was selected as an active well and other five coalbed methane wells were set as observation wells, which formed the testing well group. And the testing result can be used to analyze the reservoir connectivity and the dominant flow direction. The result shows that well W-160 is connected with well W-156 and well W-166, and the reservoir connectivity between them is better than the connectivity be-tween W-160 well with other observation wells. Therefore, east-north and west-south direction is the dominant flow direction of this coalbed methane reservoir. Comparing with production data, the correctness of the result can be validated. Thus, interference well test can be used to detect the reservoir connectivity and dominant flow direc-tion of coalbed methane reservoir, which can direct large-scale coalbed methane development.