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松辽盆地梨树断陷金山地区天然气地球化学特征及其地质意义

石油实验地质

2016年 38卷第2期

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Title

Geochemical characteristics and geological significance of natural gas in Jinshan area of the Lishu Fault Depression

作者

路清华顾忆宋振响周卓明李贶

Authors

Lu Qinghua Gu Yi Song Zhenxiang Zhou Zhuoming Li Kuang

单位

中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126

Organization

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

摘要

金山地区位于梨树断陷的东南斜坡带上,是重要的天然气勘探区。通过对金山地区已发现油气藏的天然气地球化学特征研究,认为金山地区天然气有2种不同类型的成因:(1)金2井天然气CO2含量高,为非烃气藏,CO2为无机成因气,烷烃气干燥系数高,为干气,属无机与有机的混合成因气,有机成因气主要为油型气;(2)其余各井天然气非烃含量低,为烷烃气藏,烷烃气中CH4含量较低,为典型湿气,属成熟-高成熟煤型气。

Abstract

Jinshan area is located in the southeast slope belt of the Lishu Fault Depression, which is an important gas exploration target. The geochemical characteristics of natural gas in Jinshan area indicate that there are two genetic types. (1) In well Jin2, non-hydrocarbon gas reservoirs with a high inorganic CO2 content were found. The hydrocarbon gas is featured by a high dryness coefficient. Inorganic gas was mixed with oil associated organic gas. (2) Hydrocarbon gas reservoirs were discovered in the other wells. The gas is coal-type wet gas with a high CH4 content, and is mature or over-mature.

关键词：

天然气; 地球化学; 碳同位素; 金山地区; 梨树断陷;

Keywords:

natural gas; geochemistry; carbon isotope; Jinshan area; Lishu Fault Depression;

基金项目

中国石化科技项目(P14041)。

DOI

https://doi.org/10.11781/sysydz201602259