沁水盆地郑庄区块勘探现状及试采效果分析

Current Status of Exploration and Analysis of Test Results of Trial Production in Zhengzhuang Block in Qinshui Basin

与常规天然气藏相比,煤层气储层具有较强的非均质性,同时受构造、保存等多种条件的影响,使同一盆地内煤层的地质条件发生很大的变化,严重影响了煤层气的开采效果。通过在沁水盆地郑庄区块开展煤层气勘探评价及前期试采工作,认为郑庄区块探明程度高,煤层气资源基础落实,同时7口埋深大于1000m的井试采获得工业气流,打破了煤层气的试采深度禁区,拓宽了煤层气开发区域,为郑庄区块规模开发奠定了基础。

In comparison with the conventional natural gas, the CBM reservoir has strong heterogeneous char- acter. Meanwhile, CBM reservoir is affected by a variety of conditions of tectonics and preservation. The geo- logical conditions even in the same basin may vary greatly, which affect severely the results of extraction of CBM. Based on evaluation of CBM exploration made in Zhengzhuang Block in Qinshui Basin and production tests made in early period, the authors consider that the prospecting degree in Zhengzhuang block is high and the basis of CBM resources are assured. Meanwhile, seven wells with depths greater than 1,000 m were tested and industrial gas flow obtained, breaking the limit depth of the test well. This broadens the scope of CBM development and has laid foundation for scale development in Zhengzhuang block.