Parameter evaluation for low-porosity and low-permeability reservoirs in western Sichuan

Low-porosity and low-permeability reservoirs in western Sichuan are characterized in poor physical property,inconstant lithology,diversified reservoir space type and complex pore structure.Thus,the traditional methods of well logging evaluation in reservoir parameters are limited in many ways,which is the main factor in restriction of the reservoir evaluation.Based on the basic character analysis of reservoirs such as physical property,pore structure and probability theory,a set of evaluation methods of reservoir parameters is established and developed.Practical application showed that these methods not only greatly improved the dependability of parameters evaluation,but also enlarged the application range of model in low-porosity and low-permeability reservoirs.