石油勘探与开发 >

2022 , Vol. 49 >Issue 1: 45 - 55

DOI: https://doi.org/10.11698/PED.2022.01.04

油气勘探

塔里木盆地古城地区奥陶系滩相白云岩气藏特征及主控因素

  • 冯军 ,
  • 张亚金 ,
  • 张振伟 ,
  • 付晓飞 ,
  • 王海学 ,
  • 王雅春 ,
  • 刘洋 ,
  • 张君龙 ,
  • 李强 ,
  • 冯子辉
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  • 1.东北石油大学地球科学学院,黑龙江大庆 163318;
    2.东北石油大学“陆相页岩油气成藏及高效开发”教育部重点实验室,黑龙江大庆163318;
    3.大庆油田有限责任公司勘探开发研究院,黑龙江大庆 163712;
    4.黑龙江工程学院,哈尔滨150050
冯军（1992-）,男,内蒙古赤峰人,现为东北石油大学在读博士研究生,主要从事油气藏与资源评价方面研究,地址：黑龙江省大庆市高新技术产业开发区学府街99号,东北石油大学地球科学学院,邮政编码：163318。E-mail：408298107@qq.com

收稿日期: 2021-07-16

  修回日期: 2022-01-05

  网络出版日期: 2022-01-21

基金资助

国家自然科学基金“断裂对页岩油富集控制作用研究—以松辽盆地南部青一段页岩油为例”（U20A201009）; 国家自然科学面上基金“断层破坏盖层机理及封闭性定量评价”（41972157）; 中国石油天然气股份有限公司重大科技专项“塔东天然气成藏理论及勘探配套技术研究”（2016E-0204）

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Characteristics and main control factors of Ordovician shoal dolomite gas reservoir in Gucheng area, Tarim Basin, NW China

  • FENG Jun ,
  • ZHANG Yajin ,
  • ZHANG Zhenwei ,
  • FU Xiaofei ,
  • WANG Haixue ,
  • WANG Yachun ,
  • LIU Yang ,
  • ZHANG Junlong ,
  • LI Qiang ,
  • FENG Zihui
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  • 1. College of Earth Science, Northeast Petroleum University, Daqing 163318, China;
    2. Ministry of Education Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Northeast Petroleum University, Daqing 163318, China;
    3. Exploration and Development Research Institute, Daqing Oilfield Company Ltd., Daqing 163712, China;
    4. Heilongjiang Institute of Technology, Ha’erbin 150050, China

Received date: 2021-07-16

  Revised date: 2022-01-05

  Online published: 2022-01-21

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摘要

以地震、钻井和实验分析为基础,对塔里木盆地古城地区奥陶系鹰山组三段滩相白云岩气藏特征及成藏主控因素进行研究。结果表明,古城地区白云岩气藏类型为“滩-断双控”的岩性气藏,其形成主要受以下因素控制：①持续发育的古构造背景是天然气聚集的有利指向区;②台缘缓坡环境沉积的大面积中—高能颗粒滩是白云岩储集层形成的物质基础;③大气淡水淋滤、白云石化作用叠加断裂带流体溶蚀改造是优质白云岩储集层形成的关键因素;④天然气来源于古油藏裂解和烃源岩分散有机质生烃,北北东向走滑断裂是天然气垂向运移的优势通道;⑤鹰山组一、二段灰岩盖层为气藏形成提供了直接遮挡条件。在此基础上综合分析,指出古城地区鹰山组三段近南北向发育的3个颗粒滩带和北北东向展布的7条走滑断裂带共同控制了滩相白云岩气藏的发育。

关键词： 塔里木盆地; 古城地区; 奥陶系鹰山组; 白云岩气藏; 颗粒滩相; 走滑断裂; 溶蚀作用

本文引用格式

冯军 , 张亚金 , 张振伟 , 付晓飞 , 王海学 , 王雅春 , 刘洋 , 张君龙 , 李强 , 冯子辉 . 塔里木盆地古城地区奥陶系滩相白云岩气藏特征及主控因素[J]. 石油勘探与开发, 2022 , 49(1) : 45 -55 . DOI: 10.11698/PED.2022.01.04

Abstract

Based on seismic, drilling data and experimental analysis, the characteristics and main controlling factors of shoal dolomite gas reservoir in the third member of Ordovician Yingshan Formation of Gucheng area, Tarim basin were examined. The study shows that the dolomite gas reservoir in Gucheng area is lithologic gas reservoir controlled by shoal and fault jointly, and its formation is mainly attributed to the following factors: (1) The continuously developing paleotectonic structure has been in the direction of gas migration and accumulation; (2) The large area of medium-high energy grain bank deposited in gentle slope environment is the material basis for the formation of dolomite reservoir; (3) Atmospheric water leaching and dolomitization and fluid dissolution in fault zone are the key factors for the formation of high-quality dolomite reservoir; (4) The natural gas comes from cracking of the ancient oil reservoir and hydrocarbon generation of dispersed organic matter in source rocks, and the NNE-trending strike-slip fault is the dominant channel for vertical migration of natural gas; (5) Limestone cap rocks in the first and second members of Yingshan Formation provide direct sealing for the formation of gas reservoir there. On the basis of comprehensive analysis, it is pointed out that the Gucheng area has three grain shoal zones in the third member of Yingshan Formation in nearly S-N direction, which together with seven strike-slip fault zones in NNE direction control the development of shoal dolomite gas reservoir.

Key words： Tarim Basin; Gucheng area; Ordovician Yingshan Formation; dolomite gas reservoir; grain shoal facies; strike-slip fault; dissolution

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