页岩储层流体赋存状态及其地质主控因素分析——以涪陵龙马溪组页岩气为例

Analysis of Shale Reservoir Fluid Occurrence State and Its Main Geological Controlling Factor: A Case Study of Shale Gas in Fuling Longmaxi Formation

厘清页岩储层赋存流体类型及其地质主控因素对于页岩气开发工作而言尤为重要。通过紧密结合涪陵页岩气勘探开发实践,依托室内分析和现场生产数据,查明了页岩储层中赋存页岩气和地层水,页岩气主要包含了吸附气和游离气,地层水则主要以束缚水的状态赋存于页岩储层中,矿物类型及构造保存条件控制了页岩储层赋存流体类型及赋存量。

Clarifying existed shale reservoir fluid type and its main geological controlling factor is especially important in shale gas development. Combined with Fuling shale gas exploration and development practice and supported by lab analysis and field production data, it is determined that shale gas and formation water locate in shale reservoir. Shale gas consists of absorbed gas and free gas and formation water stores as bound water in shale reservoir. Mineral type and structural preservation condition control shale reservoir fluid occurrence type and amount.