Origin of gas condensate reservoir in Fuman Oilfield, Tarim Basin, NW China  

作　　者：WANG Qinghua 

机构地区：[1]Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China [2]R&D Center for Ultra-Deep Complex Reservoir Exploration and Development,CNPC,Korla,Xinjiang 841000,China [3]Engineering Research Center of Ultra-deep Complex Oil and Gas Reservoir Exploration and Development,Xinjiang Uygur Autonomous Region,Korla,Xinjiang 841000,China

出　　处：《Petroleum Exploration and Development》2023年第6期1295-1307,共13页石油勘探与开发（英文版）

基　　金：Supported by the National Natural Science Foundation of China(42230816);PetroChina Science and Technology Project(2021DJ1501);Tarim Oilfield Technology Project(T202112).

摘　　要：To understand the reservoir property and hydrocarbon accumulation conditions of the Middle and Upper Ordovician intraplatform shoal between ultra-deep main strike-slip faults in Fuman Oilfield of the Tarim Basin, China, the main strike-slip faults in and around well FD1 in the basin were analyzed in terms of sedimentary facies, sequence stratigraphy, intraplatform shoal reservoir property, and oil and gas origins, based on drilling data. The Yingshan Formation intraplatform shoal between the main strike-slip faults is superimposed with low-order faults to form a new type of hydrocarbon play. Firstly, hydrocarbons generated from the Lower Cambrian Yuertusi Formation source rocks vertically migrated into the second member of Yingshan Formation through the main strike-slip faults, and then migrated laterally until they were accumulated. A small amount of oil from Well FD1 came from the Yuertusi Formation source rocks in the mature stage, and a large amount of gas originated from oil cracking in the ultra-deep reservoirs. Therefore, the secondary gas condensate reservoir in Well FD1 is characterized by high gas to oil ratio, dry gas (dryness coefficient being 0.970) and hybrid origin. This new type of hydrocarbon play characterized by intraplatform shoal and low-order fault suggests a prospect of continuous hydrocarbon-bearing area in Fuman Oilfield, which will expand the ultrap-deep oil and gas exploration in the oilfield.

关 键 词：low-order fault intraplatform shoal ultra-deep Yingshan Formation oil cracked gas condensate gas Fuman Oilfield Tarim Basin 

分 类 号：P618.13[天文地球—矿床学]