鲁西南含煤区山西组-太原组页岩气勘探前景

Shale Gas Exploration Prospect of Shanxi Formation and Taiyuan Formation in Coal Bearing Area, Southwest of Shandong Province

山西组、太原组作为复合评价层进行页岩气评价,泥页岩中有机质丰度较高,干酪根以腐殖型为主,有机质处于低成熟-成熟阶段,具备较大的页岩气生成潜能;物性较差,属于特低孔(低孔)-低渗储层;脆性矿物含量丰富,有利于后期压裂改造;通过实测解吸气量与TOC建立的关系模型,估算了区内含气量;划分出Ⅰ类有利区、Ⅱ类有利区和远景区,指明了下一步勘探方向。

Shanxi formation and Taiyuan formation were taken as composite evaluation layer to evaluate shale gas. Abundance of organic matter in shale was high. The organic matter types were dominated by humus type. The organic matters of shale were at lower maturity to maturity. Hydrocarbon potential of shale was at the stage of massive gas generation. The physical property of shale in the study area was poor, which belonged to special low porosity （low porosity） and permeability reservoir. Content of brittle minerals was abundant,and it was conducive to the development of fracturing of shale gas reservoir. Based on the relational model between actual measured inspiratory capacity and the content of total organic carbon, estimated gas content of study area. The type Ⅰ, Ⅱ favorable area, and the prospective region were classified, pointed out the next exploration direction.