The Research On Sand Body Structure And Micro Heterogeneityof The Reservoir Of Chang 6₃ Group In HuaQing Area In Erdos Basin

The research object of this thesis is chang 6-3 reservoir of HuaQing area.Firstly,I study previous research results of the study area carefully.Based on core analysis and outcrop observation,then I did the stratigraphic division and comparison work,sedimentary facies and profile analysis and plane phase distribution of single well work as well.At the same time,I also classified the structure of sand bodies in the chang 6-3 reservoir study area,and analyzed the causes of sand bodies theoretically.At last,I used experimental test means from the micro perspective to discuss the heterogeneity of reservoirs qualitatively.The research suggests that the formation is stable overall and the change of its thickness do not chang severely.The types of the sandstone in research area are mainly lithic arkose and feldspathic litharenite and the maturity of the sandstone is low.Meanwhile,textural maturity of sandstone is medium and diagenetic grade is high.Secondly,rock debris composition and interstitial material are both very complex in this ares and.Thirdly,pore types mainly include intergranular pore and feldspar dissolved pore.Besides,it has large plane porosity.Fourthly,this reservoir,typical low porous,low and ultra-low permeable,high degree of heterogeneity,has good correlation of petrophysical properties.By comparing the different types of sandstones and their oil-bearing features,I divide the andstones ioto three different types in this area.Finally I estimate the microscopic heterogeneity of the reservoir through the character of the pore and throat,particle and interstitial matter systematically.These are very helpful and useful in the further research and work.