Origin of Natural Gas in Kekeya Field, Tarim Basin, China

被引：0
|
作者：
Hou Dujie Energy Resource Department
机构：
来源：
Journal of China University of Geosciences | 2004年 / 01期
关键词：
natural gas; origin; Kekeya; source rock;
D O I：
暂无
中图分类号：
P618.13 [石油、天然气];
学科分类号：
摘要：
This paper is mainly concentrated on the geochemical characteristics and origin of gas of Kekeya field in the Tarim basin, NW China. This study shows that Permian mudstone is the main source rock of oil and gas. Based on the carbon isotopes of C 1-C 4, the carbon isotope of gas in Kekeya field is a little heavier than that in the typical marine-derived gas. The relationship between carbon isotopes of methane and ethane is coincident with Faber equation of gas derived from organic matter Ⅰ/Ⅱ. The majority of gas maturity is estimated, based on the formula, at 1.8 %-2.2 % besides K2 and K18 wells. In addition, the gas derived from 0.9 %-1.2 % R o source rocks may also be mixture. 40Ar/ 36Ar and 3He/ 4He ratios from the gas samples also support the mixing process. Moreover, the gas in this region is mainly generated from more mature source rocks although the low mature gas exists.
引用
收藏
页码：92 / 99
页数：8
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