四川威远地区页岩储层可压性评价方法研究

Evaluation Method for the Compressibility of Shale Reservoir in the Weiyuan, Sichuan

页岩储层具有储层致密、低孔低渗的特征,要实现页岩气的经济开发,需进行体积压裂增产措施,页岩储层的可压性评价对于优选压裂井段、优化压裂参数及预测经济效益具有重要意义。四川威远页岩气示范区是页岩气开发的重要区域,本文通过计算页岩储层有效厚度、有效孔隙度、总有机碳含量、脆性指数等参数,并结合压裂施工工艺参数、微地震监测成果等资料,对四川威远地区龙马溪组页岩储层的可压性进行综合评价,为优选压裂井段、优化压裂参数以提高压裂改造效果提供重要依据。

The shale reservoir has the characteristics of tight reservoir, low porosity and low permeability. To realize the economic development of shale gas, the stimulation measures of volumetric fracture are needed. The evaluation for the compressibility of shale reservoir has great significance on selecting well sections of fracture, optimizing the fracture parameters and predicting economic benefits. The Weiyuan Shale Gas Demonstration Area in Sichuan is an important area for the development of shale gas. We calculated the effective thickness, effective porosity, total organic carbon content, brittleness index and other parameters of the shale reservoir, and combined with the parameters of fracturing construction process and the results of micro-seismic monitoring to evaluate the compressibility of shale reservoir in Weiyuan, Sichuan, which could provide an important basis for selecting well sections of fracture and optimizing fracturing parameters to improve the effect of fracture.