页岩储层特征与储层破裂特征研究

Study on the Reservoir Characteristics and Fracturing Characteristics of Shale Gas Reservoirs

分析了页岩气储层差异,与致密气、煤层气对比,页岩气在储层特性、渗流机理、赋存形态、储量方面存在差异;在此基础上从页岩储层微观结构、页岩气赋存形态、渗流机理及天然裂缝等方面进一步阐述了页岩储层特征。针对页岩储层的特点,需改变传统造长缝的压裂理念转变为形成缝网的压裂理念;探讨了页岩储层中岩石破裂特征,对产能优化方面总结了与不同脆性程度相适应的压裂液体系及支撑剂浓度;针对国内页岩开发现状提出展望,对我国页岩气研究与开发具有一定的指导意义。

Compared with tight gas and coalbed methane,the differences of reservoir are analyzed in fields of reservoir characteristics,flow mechanism,occurrence mode and reserves are analyzed.On this basis,the shale gas reservoir characteristics,including the micro-structure,occurrence mode,flow mechanism and natural fractures are investigated.According to the characteristics of shale reservoirs,the traditional concept of hydraulic fracture should be converted,and the net fracturing technology should be adopted.Meanwhile,the fracturing characteristics are discussed,and suitable fracture fluid and proppant concentration are summarized for production optimization.At last,based on the development of shale gas in China,proposes are made for the future work.