[1]梁顺军,游李伟,温银宇,等.龙门山逆冲断褶带分段特征和下二叠统控藏关键研究[J].复杂油气藏,2023,16(02):167.[doi:10.16181/j.cnki.fzyqc.2023.02.008]
 LIANG Shunjun,YOU Liwei,WEN Yinyu,et al.Segmentation characteristics of Longmenshan thrust fold beltand the key of reservoir control of Lower Permian[J].Complex Hydrocarbon Reservoirs,2023,16(02):167.[doi:10.16181/j.cnki.fzyqc.2023.02.008]
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龙门山逆冲断褶带分段特征和下二叠统控藏关键研究()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
16卷
期数:
2023年02期
页码:
167
栏目:
油气勘探
出版日期:
2023-06-25

文章信息/Info

Title:
Segmentation characteristics of Longmenshan thrust fold beltand the key of reservoir control of Lower Permian
作者:
梁顺军12游李伟2温银宇2刘定锦2吴育林2 陈中云1高怀军1杜时锋1段 卓
1.中国石油东方地球物理勘探公司西南物探分公司,四川 成都 610213;2.中国石油东方地球物理勘探公司西南物探研究院,四川 成都 610213
Author(s):
LIANG Shunjun12YOU Liwei 2WEN Yinyu 2LIU Dingjin2WU Yulin 2CHEN Zhongyun1GAO Huaijun1DU Shifeng1DUAN Zhuo1
1. Southwest Geophysical Exploration Branch of BGP,CNPC,Chengdu 610213,China;2.Southwest Geophysical Research Institute of BGP,CNPC,Chengdu 610213,China
关键词:
石油地质条件主控因素成藏模式区带评价下二叠统龙门山分段
Keywords:
petroleum geological conditionsmain control factorsreservoir forming modezone evaluationLower PermianLongmenshan section
分类号:
TE132
DOI:
10.16181/j.cnki.fzyqc.2023.02.008
文献标志码:
A
摘要:
龙门山逆冲断褶带(简称龙门山)可分为三段,即北段、中段和南段,各段下二叠统气田(藏)均为构造型圈闭。三段的下二叠统天然气勘探历程及方法相同,但北段的天然气发现程度及探明储量远好于南段和中段。分析龙门山下二叠统天然气成藏条件,三段具有相同的“储、盖、运”条件,即区域性的中下三叠统膏盐层盖层,栖霞组裂缝-孔隙性白云岩储层,天然气运移方式以垂向为主。“生、圈”方面差异较大,“生油”方面,烃源岩主要是德阳-安岳-长宁裂陷槽下寒武统泥页岩,北段及中段沉积厚度大、生烃能力强,南段几乎剥蚀殆尽,生烃能力严重不足;“圈闭”而言,北段地面背斜少而潜伏背斜发育,南段地面背斜发育而潜伏背斜稀少,中段背斜圈闭稀少。“保存”方面,地面背斜保存条件差,气藏遭到破坏;潜伏背斜保存条件好,成藏条件优越。龙门山天然气成藏的主控因素为保存条件和生烃能力,主要成藏模式有层间褶皱潜伏背斜型,低缓背斜型及逆掩下盘潜伏背斜型三种。基于上述认识,对龙门山三段的油气勘探有利区带进行综合评价。
Abstract:
The Longmenshan thrust fold belt(hereinafter referred to as Longmenshan)can be divided into three segments,namely the northern,middle,and southern segments. The lower Permian gas fields (reservoirs) in each segment are structural traps. The exploration process and methods of Lower Permian natural gas in the three members are the same,but the extent of gas discovery and proven reserves in the northern segment is much better than those in the southern and central segments. Analyzing the reservoir forming conditions of natural gas in the lower Permian of Longmenshan,the three segments share the same “storage,cover and transportation” conditions,that is,the regional gypsum salt cap of the middle and lower Triassic,the fractured-pore dolomite reservoirs of the Qixia Formation,and gas transportation mainly in the vertical direction. There are great differences between “generation and trap”. In terms of “oil generation”,the hydrocarbon source rock is mainly the lower Cambrian shale of the Deyang-Anyue-Changning rift trough,with large sediment thickness and strong hydrocarbon generation capacity in the northern and middle sections,while the southern section is almost stripped out,and has a serious lack of hydrocarbon generation capacity. In terms of “traps”,the northern section has developed buried anticlines but few surface anticlines,the southern section has developed anticlines but few buried anticlines and the middle section has few anticline traps. In terms of “preservation”,the surface anticline has poor preservation conditions,and the gas reservoir has been destroyed,while the buried anticline has good preservation conditions and favorable reservoir forming conditions. The main controlling factors of natural gas reservoir formation in Longmenshan are preservation conditions and hydrocarbon generation capacity. The main reservoir formation modes include interlayer fold buried anticline,low gentle anticline,and overthrust footwall buried anticline. Based on the above understanding,it is carried out a comprehensive evaluation of the favorable zones for oil and gas exploration in the third member of Longmenshan.

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备注/Memo

备注/Memo:
收稿日期:2022-02-19;
改回日期:2023-01-11。
第一作者简介:梁顺军(1957—),高级工程师,从事山地复杂构造地震资料综合解释研究及油气田勘探与开发工作。
E-mail:lsjun57@sina.com。
更新日期/Last Update: 2023-06-25