柯克亚凝析气田古近系碳酸盐岩气藏类型再认识及其意义

柯克亚凝析气田位于塔里木盆地西南坳陷柯克亚构造带上,以往按构造气藏模式对该含油气层系进行评价部署,评价井失利后对该气藏类型一直认识不清。通过综合分析该地区卡拉塔尔组优质储层的控制因素、地层水特征、地层压力、生产动态等资料,认为该气藏类型属于岩性型,油气流体分布受储层物性所控制,明确了下步在研究区构造低部位寻找岩性型气藏的有利方向。

Recognition of Paleogene carbonate reservoir types of Kekeya condensate gas field in Tarim Basin and its significance

Kekeya condensate gas field is located at Kekeya structural belt of Southwest Depression in the Tarim Basin.In the past, evaluation and layout of the petroliferous strata were conducted by the structural gas reservoir model, and the gas reservoir type had not been clear for a long time because of the failure of the evaluation wells.Through comprehensive analysis of the controlling factors of high-quality reservoirs, the characteristics of formation water, the formation pressure and the gas production status of the high-quality reservoir in Kalataer Formation in the area, we believed that the gas reservoir is lithologic, and oil, gas and fluid distribution is controlled by reservoir property.It was determined that the lower location of the structure in the study area was favorable directions to find lithologic gas reservoir in future.