Characteristics of tight sandstone reservoirs and its main controlling factors of He 8 Member in Block 46,Sulige Gas Field
In order to find out the characteristics and main controlling factors of tight sandstone reservoir in He 8 Member in Block 46,Sulige Gas Field,the tight sandstone reservoir of He 8 Member was systematically studied by the analysis of cast thin section,core physical properties,scanning electron microscopy,mercury penetration,T2 nuclear magnetic and other tests.The results show that the storage space types of tight sandstone reservoir in He 8 Member in the study area are mainly intergranular dissolved pores,intragranular dissolved pores and heterogeneous matrix pores,with an average porosity of 6.93％and permeability of 1.620×10-3μm2,which is a set of very low to ultra-low porosity and ultra-low permeability reservoirs.The pore throats are not evenly distributed,and the sorting is relatively poor,mainly in the combination of small and medium pores and fine throats.Low volume fraction cuttings,high volume fraction quartz and large size particle are the material basis for the development of high quality reservoirs.The primary intergranular pores retained by sedimentation are the basis for the development of secondary pores and diagenetic fractures,and are the key to finding high quality reservoirs.
tight sandstonereservoir characteristicsmain controlling factorsHe 8 MemberSulige Gas Field
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