塔里木盆地卡塔克隆起斜坡区油气成藏期次研究

利用塔里木盆地卡塔克隆起西北部的中1井、顺托果勒低隆起的顺1井等钻井资料，在对多套层系的含油气性观察、成岩序列判识的基础上，研究了各种成岩矿物中的流体包裹体类型、丰度、组合和赋存状态等特征，并综合运用包括包裹体均一温度及冰点测定、砂岩储层中自生伊利石K-Ar同位素测年以及古地温、埋藏史和构造演化史等技术方法及综合资料，揭示了卡塔克隆起斜坡区内多层系不同相态烃类的充注成藏—调整改造或破坏过程。研究区内主要存在3期油气成藏:第一期成藏时间为410～370 Ma （相当于加里东晚期），第二期成藏时间集中在280～175 Ma （相当于海西晚期—印支期），第三期成藏时间为80～23 Ma （相当于燕山晚期—喜马拉雅中晚期）。其中，下古生界存在3期成藏过程，上古生界有2期成藏，碎屑岩中油气充注—成藏集中于海西晚期。 

Petroleum charge history of the slope area of Katake Uplift in Tarim Basin

Based on the oil and gas observation and diagenetic sequence identification of multiple sets of strata by using drilling data from well Zhong 1 on the northwestern slope of Katake Uplift and well Shun 1 in the Shuntuoguole Low Uplift of Tarim Basin, fluid inclusion types, abundance, composition and occurrence state of diagenetic minerals were studied in this paper. The comprehensive use of technical methods and data including homogenization temperature and freezing point determination of fluid inclusions, K-Ar isotope dating of authigenic illites in sandstone reservoirs, paleo-geothermometry, burial and tectonic evolution histories revealed the accumulation, adjustment or deformation of multi-facies of hydrocarbons in various formations on the slope of Katake Uplift. Results indicated three stages of hydrocarbon accumulation in the study area. The first stage was 410-370 Ma (the late Caledonian), the second stage was 280-175 Ma (the late Hercynian to Indosinian), and the third stage was 80-23 Ma (the late Yanshanian to middle and late Himalayan). There were three stages of accumulation in the Lower Paleozoic and two stages in the Upper Paleozoic. The charging and accumulation of oil and gas in clastic rocks concentrated in the late Hercynian.