柯克亚地区天然气的成因  

Geochemical characteristics and origin of gas in Kekeya field

作　　者：唐友军[1] 侯读杰[2] 肖中尧[3] 徐佑德[4] 

机构地区：[1]长江大学地球化学系 [2]中国地质大学能源系,北京100083 [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]中国石化胜利油田有限公司,山东东营257000

出　　处：《海洋石油》2006年第2期18-22,共5页Offshore Oil

基　　金：国家重点基础研究发展规划项目(项目编号:2001CB209100-01)资助

摘　　要：柯克亚地区天然气的成因众说纷纭.通过对天然气的地球化学特征的详细分析,发现柯克亚天然气碳同位素相对较重,与塔里木盆地下古生界海相天然气的碳同位素组成区别较大,并明确指出柯克亚地区的气源不是单一来源,而具有混源特征.绝大多数天然气的成熟度在1.8%～2.2%之间,也混有一些成熟度在0.9%～1.2%的源岩形成的天然气,推测天然气主要来源于石炭系-二叠系源岩,部分来源于侏罗系源岩.There were many disputes about the origin of gas in Kekeya region since the field has been found in 1977. This paper is mainly concentrated on the geochemical characteristics of gas in Kekeya field. The carbon isotopic value of natural gases in kekeya region are much heavier than that of other natural gases in Tarim basin which are mainly derived from lower Palaeozoic marine source rocks. This study elicits that gas in Kekeya region is mixed gas. The maturity of gas is estimated as 1.8 % - 2.2 %, which are generated by Carboniferous-Permian source rocks. In addition,it may be mixed with the gas derived from 0.9 % -1.2 % Ro source rocks .

关 键 词：天然气 混源气 柯克亚地区 地球化学特征 

分 类 号：TE122.1[石油与天然气工程—油气勘探] P618.130.1[天文地球—矿床学]