Study on Reservoir of Lei-4 Member of Leikoupo Formation in Northern Sichuan Basin

详细信息   

• 责任者：Hu Yang(Research Institute of Geologic Exploration and Development ; Chuanqing Drilling Company ; Chengdu ; Sichuan 610000 ; China) ; Wang Xingzhi
• 刊名：Xinjiang Petroleum Geology
• 出版年：2012
• 卷期：33(5)
• 页码：p.547-549
• issnNo：ISSN1001-3873
• isbnNo：CN65-1107/TE

摘要

Based on macroscopic and microscopic features of outcrop sections and drilling cores of the Lei-4 member of Leikoupo formation of Middle Triassic in northern Sichuan basin,combined with the conventional petrophysical data,this paper studies in detail the basic features of the reservoir space types,lithologic and petrophysical properties,space distribution,as well as the main controlling factors.The reservoir is mainly distributed in Lei-4(3) sub-member of the Leikoupo formation,with lithology of grain dolostone,next to crystalline dolostone.The intergranular,intragranular and intercrystal dissolved pores are mainly reservoir space,cracks as the main space of percolation.The reservoir formation and evolution are mainly affected by sedimentary facies and diagenesis,among which intra-platform patch beach is the most favorable facies for developing reservoirs,and supergene karstification and burial dissolution give rise to the main storage spaces.