Comprehensive prediction of the member Jia-2 reservoir in the Shuangmiao structure in northeast Sichuan basin

The Jia-2 member of Shuang Miao structure is a dolomite-dominated reservoir.This kind of dolomite reservoirs shows characteristics of good physical properties including fracture-pore type and reservoir space of intercrystalline solution pores and fractures.Based on the theory of tectonic stress field,seismic frequency attenuation and fracture detection,this paper has done researches on unified prediction of the Jia-2 reservoir that has applied a series of metods including numerical modelling of the tectonic stress field,fracture anisotropy,FVO,prestack elastic inversion and attenuation attributes by thoroughly utilizing available data of geology,well-drilling,well log and seismic data of prestackpoststack.Not only the predication result has revealed the strike and density of fractures, the relationship among formation lithology,stress distribution and tectonic development,but also are forcasted the locations of favorable dolomite reservoir as well as favorable reservoir distribution ranges.Practice has proved that these methods are effective and reliable,and can be applied to the recognization of favorable zones in the fracture-pore reservoirs.