塔里木盆地卡塔克隆起西北倾没端良里塔格组碳酸盐岩储层发育特征与影响因素

Development characteristics and influencing factors of carbonate reservoirs in the Ordovician Lianglitage Formation at the northwest pitching end of the Katake Uplift, the Tarim Basin

李慧莉 钱一雄 沙旭光 马红强

Li Huili Qian Yixiong Sha Xuguang Ma Hongqiang

钻探揭示塔里木盆地卡塔克隆起西北倾没端上奥陶统良里塔格组发育碳酸盐岩缝洞型储层。综合岩心、薄片以及测井资料,分析了储层发育特征及影响因素,研究认为加里东中期Ⅱ幕风化壳岩溶作用、准同生岩溶作用、埋藏溶蚀作用及构造破裂作用对储层发育有影响。准同生期岩溶作用及与热液有关的埋藏溶蚀作用对现存储集空间的贡献有限,研究区储层发育主控因素的研究尚需进一步深入。

Drilling results have revealed that fractured-vuggy carbonate reservoirs are developed in the Upper Ordovician Lianglitage Formation at the northwest pitching end of the Katake Uplift in the Tarim Basin.Based on analyses of core,thin section and logging data,this paper discusses reservoir development characteristics and influencing factors in the study area.The study shows that several factors have put effects on the development of reservoirs,such as karstification of the Middle Caledonian phase-Ⅱ weathering crust,penecontemporaneous karstification,burial dissolution and tectonic disruption.The penecontemporaneous karstification and hydrothermal fluid-related burial dissolution made limited contribution to the existing reservoir space.Further study is needed to identify the controlling factors for reservoir development in the study area.

10.11743/ogg20100112