油气勘探

四川盆地中部高石梯地区柱状下拉异常体分布特征及成因

  • 杨平 ,
  • 丁博钊 ,
  • 范畅 ,
  • 朱兴卉 ,
  • 王亚静 ,
  • 杨沛
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  • 中国石油集团东方地球物理勘探有限责任公司,河北涿州 072750
杨平(1975-),男,四川郫县人,博士,中国石油集团东方地球物理公司高级工程师,主要从事地震地质综合解释研究工作。地址:河北省涿州市开发区华阳东路东方公司科技园A1721,邮政编码:072750。E-mail: yangpingbgp@126.com

收稿日期: 2016-12-25

  修回日期: 2017-03-01

  网络出版日期: 2017-05-26

基金资助

中国石油天然气集团公司重大科技专项“深层油气田勘探开发关键技术研究”(2014E-3204); 中国石油天然气集团公司科学研究与技术开发项目“大型地震处理解释软件平台开发与集成”(2016E-1004)

Distribution pattern and origin of the columnar pull-down anomalies in Gaoshiti Block of Central Sichuan Basin, SW China

  • YANG Ping ,
  • DING Bozhao ,
  • FAN Chang ,
  • ZHU Xinghui ,
  • WANG Yajing ,
  • YANG Pei
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  • BGP, CNPC, Zhuozhou 072750, China

Received date: 2016-12-25

  Revised date: 2017-03-01

  Online published: 2017-05-26

摘要

以四川盆地中部高石梯地区为研究对象,通过对地震资料进行逆时偏移重新处理并结合高精度相干分析,对地震剖面上柱状下拉异常体的分布特征及成因进行分析。研究发现柱状下拉异常体在高石梯地区广泛分布,研究认为其是在走滑拉分形成的微型地堑的基础上,经多期热液活动的长期改造而形成的热液通道。以灯影组储集层为例,通过地震、地质联合分析,证实热液活动以溶蚀作用为主,对碳酸盐岩储集层进行了持续的建设性改造,进而提出热液通道和裂缝发育带是储集层发育的有利区。热液通道的发现对落实高产井位、扩大勘探领域具有一定指导意义。图9参33

本文引用格式

杨平 , 丁博钊 , 范畅 , 朱兴卉 , 王亚静 , 杨沛 . 四川盆地中部高石梯地区柱状下拉异常体分布特征及成因[J]. 石油勘探与开发, 2017 , 44(3) : 370 -379 . DOI: 10.11698/PED.2017.03.06

Abstract

The targets of this study are located in the Gaoshiti block, Central Sichuan Basin. Reprocessing the seismic data with reverse time migration (RTM) and using high-precision coherence analysis, this paper analyzed the distribution pattern and origin of the pull-down anomalies on the seismic sections. The study found that these anomalies are widely developed in Gaoshiti block, and believed that they are hydrothermal channels formed on the basis of tiny-grabens caused by the pull-apart function of strike-slip faults, and they had endured long-period, multistage hydrothermal reformation. Taking the reservoir of Dengying Formation as the example, integrated analysis of seism and geology proved that the hydrothermal activities had constructively reformed the carbonate reservoirs mainly by dissolution during long period. Therefore, it was proposed that the hydrothermal channels and fracture zones are the favorable area for good reservoirs. The discovery of hydrothermal channels is very meaningful for locating high-production well sites and extending exploration fields.

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