黔西南区上古生界页岩气资源潜力分析

通过资料收集、野外地质调查、页岩气调查井勘探、样品分析测试,对黔西南区上古生界四套含页岩系有机质页岩发育特征、地球化学及储层特征进行了综合研究。认为黔西南区有机质页岩具有厚度较大、埋深适中、有机碳含量和热演化程度较高、孔隙度和含气量较大等特点。根据页岩气有利区优选参考标准,优选出三套目的层系7个页岩气有利区,通过对页岩气有利区资源量计算参数赋值,获得P50概率下的页岩气地质资源量2.22万亿m3,可采资源量0.40万亿m3,页岩气资源潜力较大,具有较好的勘探开发前景。

Upper Paleozoic Group Shale Gas Resources Analysis in Southwestern Guizhou Province

Through data acquisition, field geological surveying, shale gas investment well exploration, and sample analysis and test, carried out comprehensive studies on development, geochemical and reservoir characteristics of 4 sets of organic shale contained rock series in Upper Paleozoic Group, southwestern Guizhou. Considered that the organic shale in the area has features of rather large thickness, moderate buried depth, higher organic carbon content and thermal evolution degree, larger porosity and gas content. Based on shale gas favorable area preferential reference standard, has selected 3 sets of target series of strata and 7 shale gas favorable areas. After favorable area shale gas resource estimation parameter assignment, obtained P50 shale gas geological resources 2 200 billion m^3, in which, exploitable 400 billion m^3. Thus, the shale gas resource has larger potential in the area with better exploration and exploitation prospect.