石油勘探与开发 >

2021 , Vol. 48 >Issue 3: 575 - 585

DOI: https://doi.org/10.11698/PED.2021.03.12

油气勘探

川西地区二叠系火山岩展布与茅口组岩溶古地貌关系及其油气勘探意义

  • 刘冉 ,
  • 罗冰 ,
  • 李亚 ,
  • 邱楠生 ,
  • 王尉 ,
  • 张宇 ,
  • 何青林 ,
  • 裴森奇
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  • 1.中国石油大学（北京）地球科学学院,北京 102249;
    2.中国石油西南油气田公司勘探开发研究院,成都 610041;
    3.中国石油西南油气田公司勘探事业部,成都 610041;
    4.中国石油西南油气田公司川西北气矿,四川江油 621709
刘冉（1990-）,男,吉林扶余人,硕士,中国石油西南油气田公司勘探开发研究院工程师,主要从事四川盆地油气勘探研究工作。地址:四川省成都市高新区天府大道北段12号中国石油科技大厦,西南油气田公司勘探开发研究院,邮政编码:610041。E-mail:liuran01@petrochina.com.cn

收稿日期: 2020-05-10

  网络出版日期: 2021-05-21

基金资助

“十三五”国家重大专项“四川盆地二叠系—中三叠统大型气田富集规律与目标评价”（2016ZX05007004）; 中国石油西南油气田公司科技重大专项“四川盆地二叠系火成岩成藏地质理论与勘探开发关键技术研究”（2019ZD01）

收起

Relationship between Permian volcanic rocks distribution and karst paleogeomorphology of Maokou Formation and its significance for petroleum exploration in western Sichuan Basin, SW China

  • LIU Ran ,
  • LUO Bing ,
  • LI Ya ,
  • QIU Nansheng ,
  • WANG Wei ,
  • ZHANG Yu ,
  • HE Qinglin ,
  • PEI Senqi
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  • 1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
    2. Research Institute of Exploration and Development, Southwest Oil & Gas Field Branch Company, PetroChina, Chengdu 610041, China;
    3. Exploration Division of PetroChina Southwest Oil & Gas Field Company, Chengdu 610041, China;
    4. Northwestern Camp in Sichuan, Southwestern Oil & Gas field Branch Company, PetroChina, Jiangyou 621709, China

Received date: 2020-05-10

  Online published: 2021-05-21

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摘要

综合应用野外剖面、钻井、测/录井、地球化学及地震等资料,对四川盆地西部二叠系茅口组沉积末期岩溶地貌特征、二叠系火山岩分布进行综合研究,并结合二者关系探讨油气地质意义。研究表明,茅口组沉积末期,受早期岩浆活动与拉张背景形成的正断层影响,川西简阳地区形成岩溶斜坡背景下的局部岩溶浅洼,茅口组残余厚度相对较薄。岩溶作用后火山活动形成爆发相火山碎屑岩、溢流相玄武岩、侵入相辉绿玢岩、火山沉积相的沉凝灰岩等火山岩类,但受断裂作用及岩溶古地貌控制,不同地区火山岩堆积特征有所差异,简阳地区喷发周期长,岩性复杂,火山岩厚度大,堆积于岩溶洼地内;中江—三台地区处于岩溶斜坡区,断裂不发育,仅形成玄武岩及沉凝灰岩薄层。因此,岩溶古地貌既控制了厚层爆发相火山岩堆积,也控制了边缘斜坡区的茅口组岩溶储集层发育,川西地区具有二叠系火山岩、茅口组多层系油气勘探潜力。图9表1参39

关键词： 四川盆地; 二叠系茅口组; 火山岩; 东吴运动; 岩溶古地貌

本文引用格式

刘冉 , 罗冰 , 李亚 , 邱楠生 , 王尉 , 张宇 , 何青林 , 裴森奇 . 川西地区二叠系火山岩展布与茅口组岩溶古地貌关系及其油气勘探意义[J]. 石油勘探与开发, 2021 , 48(3) : 575 -585 . DOI: 10.11698/PED.2021.03.12

Abstract

Based on outcrop, drilling, logging, geochemical analysis and seismic data, the karst landform and distribution of Permian volcanic rocks at the end of the sedimentary period of the Maokou Formation in the western Sichuan Basin are examined, and their petroleum geological significance is discussed. Affected by normal faults formed in the early magmatic activities and extension tectonic background in the late sedimentary period of the Maokou Formation, a local karst shallow depression under the background of karst slope came up in the Jianyang area of the western Sichuan Basin, where the residual thickness of the Maokou Formation was thinner. Basic volcanic rocks like pyroclastic rock of eruptive facies, basalt of overflow facies, diabase porphyrite of intrusive facies and sedimentary tuff of volcanic sedimentary facies were formed after karstification. However, under the effects of faulting and karst paleogeomorphology, the volcanic rocks in different areas had different accumulation features. In the Jianyang area, with long eruption time, the volcanic rocks were thick and complex in lithology, and accumulated in the karst depressions. In the Zhongjiang-Santai area located in the karst slope, there’s no fault developed, only thin layers of basalt and sedimentary tuff turned up. The karst landform controls the build-up of thick explosive facies volcanic rocks and also the development of karst reservoirs in the Maokou Formation, and the western Sichuan area has oil and gas exploration potential in volcanic rocks and the Maokou Formation.

Key words： Sichuan Basin; Permian Maokou Formation; volcanic rocks; Dongwu movement; karst paleogeomorphology

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