Sensitivity study of tight sandstone reservoir in He8 Member of Linxing area,Ordos Basin
He8 Member in Linxing area of Ordos Basin is the main productive series for increasing reserves and production of the gas field.In order to better develop it and strengthen the protection of the gas field reservoir,in view of the difference between the overall sensitivity of this reservoir and Shihezi Formation,this section is taken as the research object,through the sensitivity test of indoor natural cores,combined with scanning electron microscope,thin section identification,X-ray diffraction whole rock/clay analysis Based on the analysis of the basic characteristics of the reservoir with a large number of test data such as mercury injection and conventional pHysical properties,the sensitivity characteristics and control factors of He8 Member in Linxing area are studied.The results show that the clay minerals in the target layer are mainly chlorite,and the reservoir is generally characterized by ultra-low porosity and ultra-low permeability;The damage degree of medium velocity sensitivity,water sensitivity,salt sensitivity,alkali sensitivity and acid sensitivity of reservoir is generally weak to medium weak.It shows that the complex pore characteristics and the high content of quartz,chlorite and kaolinite in the mineral composition are the main reasons for the damage of reservoir sensitivity.The research results can provide reference for the efficient exploration and development of the target block.
NETL
NSTL
万方数据
