辽河坳陷西部凹陷天然气成因类型与成藏模式

杨鑫, 郑建京, 王晓锋, 史宝光, 毛俊莉, 王延山

doi:10.11764/j.issn.1672-1926.2011.06.1015

天然气地球科学 >

2011 , Vol. 22 >Issue 6: 1015 - 1020

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.06.1015

天然气地质学

辽河坳陷西部凹陷天然气成因类型与成藏模式

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1.中国科学院油气资源研究重点实验室，甘肃兰州 730000；2.中国科学院研究生院，北京 100049；
3.中国石油辽河油田分公司，辽宁盘锦 124010

杨鑫(1985-),男,湖北黄冈人,博士研究生,主要从事石油地质学研究.E-mail：xyang85@126.com.

收稿日期: 2011-04-25

修回日期: 2011-09-15

网络出版日期: 2011-12-10

基金资助

国家重大专项(编号：2008ZX05005)；中国科学院知识创新工程青年人才类重要方向项目(编号:KZCX2-EW-QN112)联合资助.

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Origin of Nature Gas and Gas Filling Pattern in West Sag,Liaohe Depression

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1.Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy
of Sciences,Lanzhou 730000,China; 2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,China;
3.Research institute of Exploration and Development,Liaohe Oilfield Company,PetroChina,Panjin 124010,China.

Received date: 2011-04-25

Revised date: 2011-09-15

Online published: 2011-12-10

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摘要

通过组分、同位素特征划分天然气成因类型，结合成藏条件对典型气藏进行解剖，探讨辽河西部凹陷不同成因天然气藏的成藏模式。研究认为，西部凹陷天然气以低熟煤成气和原油菌解气为主，分别以双台子地区和高升地区为典型。双台子地区原生气藏主要为东营期(35Ma)以来，沙三段中上部泥岩热解的煤成气从原油中出溶，或直接经断层运移至浅部聚集而成。高升地区菌解气藏分布于稠油层上方，主要为东营末期(24Ma)以来，原油在生物降解稠化过程中形成的生物气，经短距离运移后就近成藏。

关键词： 辽河坳陷; 天然气; 成藏模式; 西部凹陷

本文引用格式

杨鑫, 郑建京, 王晓锋, 史宝光, 毛俊莉, 王延山 . 辽河坳陷西部凹陷天然气成因类型与成藏模式[J]. 天然气地球科学, 2011 , 22(6) : 1015 -1020 . DOI: 10.11764/j.issn.1672-1926.2011.06.1015

Abstract

Natural gas origin is classified by chemical and isotopic compositions of natural gas in the west sag of Liaohe depression.We discuss the gas filling pattern by means of conditions of gas accumulation.The low-mature coal-type gas and oil-biodegraded gas are dominant in the west sag,such as Shuangtaizi area and Gaosheng as typical case.The primary gas pool of Shuangtaizi was formed since the Dongying Phase,and the coal type gas sourced from the middle-upper part mudstone in three member of Sha Formation was resolved from oil and accumulated in shallow strata series or migrated into gas trap along faults.The oil-biodegraded gas was formed before 24Ma and accumulated at top of heavy oil layers by short distance migration in the Gaosheng area.
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Key words： Liaohe depression; Natural gas; Gas filling pattern; West sag.

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