惠民凹陷南坡煤成气勘探前景分析

Exploration Prospects of Coal-formed Gas in the South Slope of Huimin Depression

通过大量的实际资料分析,认为惠民凹陷南部斜坡及其邻近地区石炭系-二叠系煤层厚度大、有机质丰度高、热演化程度中等偏高,具有生成煤成气的有利条件。同时,该区域靠近二次生气中心,储盖组合类型多样,成藏条件较好,部分地区有望形成较大规模气藏。根据盆地模拟计算,得出了该区煤成气的数量及其资源量,对有利成藏区带进行了评价,指出曲堤地垒东段、济阳地堑东部为勘探有利区域。

Through data analyzes,it was considered that the coal bed of Carboniferous-Permian in the southern slope of Huimin Depression and its neighboring regions had the characteristics of thick coal bed,high organic abundance,and medium-high thermal evolution,and it had the advantages of coal-formed gas generation.Meanwhile,the area was closed to the secondary gas generation center,it has multiple reservoir-seal assemblages and satisfactory hydrocarbon accumulation conditions.It was possible for forming large gas reservoir in some part of the area.According to basin simulation results,the amount of coal-formed gas and its resources can be obtained,and after the evaluation of the favorable gas play,it is pointed out that the east of Qudi Horst and Jiyang Graben are favorable oil exploration areas.