The generation and accumulation of natural gas from Yinan 2 gas pool in Kuqa Depression  

作　　者：LI Xianqing XIAO Xianming TANG Yongchun XIAO Zhongyao Ml Jingkui LIU Dehan SHEN Jiagui LIU Jinzhong 

机构地区：[1]The State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China [2]Key Laboratory of Coal Resources,Ministry of Education,China University of Mining and Technology,Beijing 100083,China [3]The Research Center of Petroleum Energy and Environment,California Engineer and Technology College,21910 Currier Rd,Walnut,CA 61769,USA [4]Research Institute of Exploration and Development,Tarim Oil Field Sub-Company,PetroChina,Korla 841000,China

出　　处：《Chinese Science Bulletin》2004年第S1期107-114,共8页

摘　　要：By using the methods of hydrocarbon generation kinetics and carbon isotope kinetics, combined with geological background of natural gas pool formation, the generation and accumulation of natural gas from Yinan 2 gas pool was studied in Kuqa Depression of the Tarim Basin. Natural gas of Yinan 2 gas pool is mainly derived from Middle and Lower Jurassic coal-bearing source rocks, and generally belongs to long time-accumulated gas. It is suggested that Yinan 2 gas is chiefly accumulated in the last 5 Ma, its Ro ranges from 1.25% to 1.95%, and the loss rate of natural gas is about 25%-30%. This work not only complements and reduces the deficiency of formation model of natural gas pools which traditionally depends on the matching relationships between source rock, reservoir, cap rock, and trap, but also is a useful reference in the study of other gas pools.By using the methods of hydrocarbon generation kinetics and carbon isotope kinetics, combined with geological background of natural gas pool formation, the generation and accumulation of natural gas from Yinan 2 gas pool was studied in Kuqa Depression of the Tarim Basin. Natural gas of Yinan 2 gas pool is mainly derived from Middle and Lower Jurassic coal-bearing source rocks, and generally belongs to long time-accumulated gas. It is suggested that Yinan 2 gas is chiefly accumulated in the last 5 Ma, itsR 0 ranges from 1.25% to 1.95%, and the loss rate of natural gas is about 25%–30%. This work not only complements and reduces the deficiency of formation model of natural gas pools which traditionally depends on the matching relationships between source rock, reservoir, cap rock, and trap, but also is a useful reference in the study of other gas pools.

关 键 词：natural GAS formation HYDROCARBON generation kinetics carbon ISOTOPE source rock Yinan 2 GAS POOL KUQA Depression. 

分 类 号：P618.13[天文地球—矿床学]