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储层裂缝的发育特征、规模在油气藏勘探、开发中意义重大。塔里木盆地库车坳陷大北地区天然气储层具有目的层段埋深大,岩性致密,基质孔隙不发育,裂缝发育的特征,属于致密-裂缝性储层。裂缝的形成受多种因素影响,且各因素所起作用不同,在论述了各种影响裂缝形成的众多因素的基础之上,引入了模糊评判方法,对控制裂缝特征的众多因素进行了评判,确定了大北地区砂岩储层裂缝的主控因素。
The developmental characteristics and scale of reservoir fractures are of great significance in the exploration and development of oil and gas reservoirs. The natural gas reservoirs in the Dabei area of the Kuqa Depression of Tarim Basin are characterized by deep burial depth, tight lithology, poorly developed matrix pores and fractures, and are characterized by tight-fractured reservoirs. The formation of cracks is influenced by many factors, and the factors play different roles. Based on the discussion of various factors that affect the formation of cracks, the fuzzy evaluation method is introduced to judge the many factors that control the characteristics of cracks. The main controlling factors of sandstone reservoir fractures in Dabei area were determined.