石油勘探与开发 >

2016 , Vol. 43 >Issue 1: 1 - 11

DOI: https://doi.org/10.11698/PED.2016.01.01

油气勘探

四川盆地西北部晚震旦世—早古生代构造演化与天然气勘探

  • 谷志东 ,
  • 殷积峰 ,
  • 姜华 ,
  • 张宝民 ,
  • 李秋芬 ,
  • 袁苗 ,
  • 翟秀芬 ,
  • 张黎 ,
  • 杨帆
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  • 中国石油勘探开发研究院
谷志东（1979-）,男,辽宁凌海人,博士,中国石油勘探开发研究院工程师,主要从事构造地质与油气地质综合研究。地址：北京市海淀区学院路20号,中国石油勘探开发研究院石油地质研究所,邮政编码：100083。E-mail: guzhidong@petrochina.com.cn

网络出版日期: 2017-01-01

基金资助

国家油气科技重大专项“海相碳酸盐岩油气资源潜力与大油气田形成条件、分布规律研究”（2011ZX05004-001）; 中国石油科技重大专项“深层大油气田形成与分布”（2014E-3201）

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Tectonic evolution from Late Sinian to Early Paleozoic and natural gas exploration in northwestern Sichuan Basin, SW China

  • GU Zhidong ,
  • YIN Jifeng ,
  • JIANG Hua ,
  • ZHANG Baomin ,
  • LI Qiufen ,
  • YUAN Miao ,
  • ZHAI Xiufen ,
  • ZHANG Li ,
  • YANG Fan
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  • PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

Online published: 2017-01-01

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摘要

基于四川盆地西北部周缘野外露头、钻井与地震资料综合分析,系统论述该区晚震旦世—早古生代构造演化特征,分析其油气地质意义,指出近期有利勘探方向。晚震旦世—早古生代该区主要经历3期构造演化：①晚震旦世—早寒武世早期,受区域拉张作用影响,形成近南北向展布两期陆内裂陷和灯影组两期台缘;②早寒武世中期—中奥陶世,受西北部碧口古陆多期隆升作用影响,该区发生强烈剥蚀,西北部强于东南部;③晚奥陶世—志留纪末,受广西运动挤压作用影响,该区再次发生强烈剥蚀,西南部强于东北部。晚震旦世—早寒武世早期,陆内裂陷的形成控制了灯影组两期台缘丘滩相储集层与下寒武统优质烃源岩的发育;早寒武世中期,碧口古陆的隆升控制了孔明洞组颗粒滩相储集层围绕古陆周缘的分布。研究区纵向上应选择灯四段与孔明洞组作为主要勘探目的层,平面上九龙山构造圈闭与油气运聚期相匹配,是近期最为有利勘探区带。图11参39

关键词： 四川盆地; 晚震旦世—早古生代; 构造演化; 天然气勘探; 陆内裂陷; 碧口古陆; 灯影组; 孔明洞组; 九龙山构造

本文引用格式

谷志东 , 殷积峰 , 姜华 , 张宝民 , 李秋芬 , 袁苗 , 翟秀芬 , 张黎 , 杨帆 . 四川盆地西北部晚震旦世—早古生代构造演化与天然气勘探[J]. 石油勘探与开发, 2016 , 43(1) : 1 -11 . DOI: 10.11698/PED.2016.01.01

Abstract

Based on the field outcrops, drilling and seismic data of northwestern Sichuan Basin, this paper systematically discusses tectonic evolution characteristics from the Late Sinian to the Early Paleozoic, analyzes the petroleum geology significance, and points out the recent favorable exploration directions in this area. The area experienced mainly three times of tectonic evolution during the Late Sinian to the Early Paleozoic: (1) During the Late Sinian to the early period of Early Cambrian, this area was affected by tension action and formed two sets of nearly north-south trending continental rifts, and two sets of platform margins in the Sinian Dengying Formation. (2) During the middle period of the Early Cambrian to the Middle Ordovician, this area was eroded strongly (stronger in the northwest than in the southeast) because of multi-period uplifting of the northwestern Bikou paleo-land. (3) During the Late Ordovician to the Late Silurian, this area was eroded strongly again because of the compression of the Kwangsian Orogeny, and the erosion was stronger in the southwest than in the northeast. During the Late Sinian to the Early Cambrian, the formation of continental rifts controlled the development of bioherm beach facies reservoirs on the platform margins in the Dengying Formation and the high quality source rock in the Lower Cambrian series. During the middle of the Early Cambrian, the uplifting of the Bikou paleo-land controlled the distribution of the Kongmingdong Formation oolitic beach facies reservoirs around the paleo-land. It is suggested that, vertically, the fourth Member of the Dengying Formation and the Kongmingdong Formation be the main exploration targets, and, horizontally, the Jiulongshan structural trap be the most beneficial exploration belts recently due to its matching with petroleum migration and accumulation.

Key words： Sichuan Basin; Late Sinian - Early Paleozoic; tectonic evolution; natural gas exploration; intracontinental rift; Bikou paleo-land; Dengying Formation; Kongmingdong Formation; Jiulongshan structure

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