库车坳陷天然气地球化学特征和成因

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (5): 489-492.

库车坳陷天然气地球化学特征和成因

李贤庆^1,2, 肖中尧³, 胡国艺⁴, 田辉², 周强¹

1.中国矿业大学煤炭资源教育部重点实验室,北京 100083;
2.中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州 510640;
3.中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒 841000;
4.中国石油勘探开发研究院廊坊分院天然气地质研究所,河北廊坊 065007

收稿日期:2004-11-05 出版日期:2005-10-01 发布日期:2020-11-23
作者简介:李贤庆(1967-),男,浙江富阳人,教授,博士,有机地球化学,(Tel)010-62331854-8131(E-mail)Lixq@pig.ac.cn.
基金资助:
国家“十五”重点科技攻关项目(2001BA605A02-03-01,2004BA616A02-01-01)中国博士后科学基金项目(2002031282 )资助

Origin and Geochemistry of Natural Gas in Kuqa Depression,Tarim Basin

LI Xian-qing^1,2,XIAO Zhong yao³,HU Guo-yi⁴,TTIAN Hui²,ZHOU Qiang¹

1. Key Laboratory of Coal Resources,Ministry of Education,China University of Mining and Technology,Beijing 100083,China;
2. State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,CAS,Guangzhou,Cuangdong 510640,China;
3. Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China;
4. Institute of Natural Gas Geology,Langfang Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Langfang,Hebei 065007,China

Received:2004-11-05 Online:2005-10-01 Published:2020-11-23

摘要/Abstract

摘要： 阐述了库车坳陷天然气地球化学特征,并应用碳同位素动力学研究结果,探讨了库车坳陷天然气的成熟度和气源。库车坳陷天然气有遥气、凝析气和干气多种类型;天然气具有由西向东、由北向南甲烷含量减少、干燥系数减小的趋势;天然气主要属煤成气,来源于中生界烃源岩。库车坳陷不同构造带天然气的成熟度差异较大,R。值从0.7%变化到2%以上。克拉2气田天然气R。值为1.3%~2.5%.综合目前多方面资料分析,库车坳陷天然气的主力气源岩应是侏罗系煤系烃漯岩,三叠系烃源岩的气源贡献次之。

关键词: 库车坳陷, 天然气成因, 碳同位素动力学, 成熟度, 气源

Abstract: Geochemical characteristics of.natural gas in Kuqa depression of Tarim basin are studied.The maturity and source of gas in the depression is discussed by using the result of carbon isotope kinetics.The gas in Kuqa depression,containing wet gas,condensate and dry gas,appears the trends of both methane content and dryness cofficient decreases from west to east and from north to south.It belongs to coal-formed gas and originates from Mesozoic source rocks.Its maturity in different structural belts is differentiated with Ro ranging from 0.7% to over 2%.The Ro of gas from Kela-2 gas field ranges from 1.3% to 2.5%.It is considered from the comprehensive data analyses that the major source rocks in Kuqa depression should be Jurassic coal-bearing source rocks,while Triassic source rocks make the second contrbution to the gas pool in it.

Key words: natural gas, origin, carbon isotope, kinetics, maturity, gas source, Kuqa depression

中图分类号:

TE124.1

李贤庆, 肖中尧, 胡国艺, 田辉, 周强. 库车坳陷天然气地球化学特征和成因[J]. 新疆石油地质, 2005, 26(5): 489-492.

LI Xian-qing, XIAO Zhong yao, HU Guo-yi, TTIAN Hui, ZHOU Qiang. Origin and Geochemistry of Natural Gas in Kuqa Depression,Tarim Basin[J]. Xinjiang Petroleum Geology, 2005, 26(5): 489-492.

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