石油勘探与开发 >

2020 , Vol. 47 >Issue 1: 11 - 18

DOI: https://doi.org/10.11698/PED.2020.01.02

油气勘探

昭通太阳背斜区浅层页岩气勘探突破及其资源开发意义

  • 梁兴 ,
  • 徐政语 ,
  • 张朝 ,
  • 王维旭 ,
  • 张介辉 ,
  • 鲁慧丽 ,
  • 张磊 ,
  • 邹辰 ,
  • 王高成 ,
  • 梅珏 ,
  • 芮昀
展开
  • 1. 中国石油浙江油田公司,杭州 311100;
    2. 中国石油杭州地质研究院,杭州 310023
梁兴（1965-）,男,广西玉林人,博士,中国石油天然气股份有限公司浙江油田分公司教授级高级工程师,主要从事非常规页岩油气、煤层气地质工程一体化综合评价与勘探开发部署研究。地址：浙江省杭州市余杭区五常街道紫荆湾路,中国石油浙江油田公司办公室,邮政编码：311100。E-mail: liangx85@petrochina.com.cn

收稿日期: 2019-11-21

  网络出版日期: 2020-01-17

基金资助

国家科技重大专项项目（2017ZX05063）

收起

Breakthrough of shallow shale gas exploration in Taiyang anticline area and its significance for resource development in Zhaotong, Yunnan province, China

  • LIANG Xing ,
  • XU Zhengyu ,
  • ZHANG Zhao ,
  • WANG Weixu ,
  • ZHANG Jiehui ,
  • LU Huili ,
  • ZHANG Lei ,
  • ZOU Chen ,
  • WANG Gaocheng ,
  • MEI Jue ,
  • RUI Yun
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  • 1. PetroChina Zhejiang Oilfield Company, Hangzhou 311100, China;
    2. PetroChina Hangzhou Research Institute of Petroleum Geology, Hangzhou, 310023, China

Received date: 2019-11-21

  Online published: 2020-01-17

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摘要

综合中国南方海相页岩气10年勘探开发成果与评价认识,针对云贵高原昭通探区山地页岩“高演化、强改造、剪应力”的特点及浅层页岩气扩散与渗漏时间长、保存条件最为关键等现实问题,对浅层页岩气甜点控制因素及其选区评价关键技术进行研究。2017—2018年,昭通国家级页岩气示范区率先在埋深700~2 000 m的太阳背斜上获得了浅层页岩气的勘探突破和规模探明地质储量,通过太阳背斜区浅层页岩气成藏条件分析及甜点控制因素研究,明确盆地外复杂构造区山地浅层页岩气成藏与产能潜力受控于5大要素：①富气区构造改造弱,整体保存条件良好,呈现典型压扭性改造圈闭赋存模式;②富气区处于超压状态,页岩含气量高;③富气区发育优质页岩,烃源条件优越;④富气区页岩储集层品质优良,Ⅰ类储集层占主导;⑤富气区页岩脆性矿物含量高,水平应力差小,易于体积压裂改造。昭通示范区太阳背斜区浅层页岩气的勘探突破和产能规模建设的创新实践及其形成的核心技术,具有重要的示范与引领作用。图23表5参42

关键词： 浅层页岩气; 志留系龙马溪组; 奥陶系五峰组; 勘探突破; 太阳背斜区; 昭通地区; 背斜构造

本文引用格式

梁兴 , 徐政语 , 张朝 , 王维旭 , 张介辉 , 鲁慧丽 , 张磊 , 邹辰 , 王高成 , 梅珏 , 芮昀 . 昭通太阳背斜区浅层页岩气勘探突破及其资源开发意义[J]. 石油勘探与开发, 2020 , 47(1) : 11 -18 . DOI: 10.11698/PED.2020.01.02

Abstract

Based on exploration and development results and evaluation of marine shale gas in South China in the past ten years, in view of the features of "high maturity, strong tectonic reconstruction and high shear stress" of the shale in Zhaotong exploration zone in the Yunnan and Guizhou Plateau, as well as the key issues of long time diffusion and leakage of shallow shale gas, and the preservation conditions, the factors controlling shallow shale gas sweet spot and key zone selection evaluation technology of shale gas are investigated. From 2017 to 2018, the first significant exploration breakthrough was made in the Taiyang anticline at a buried depth of 700 to 2 000 m, discovering large-scale proved geological reserves of shallow shale gas. By examining the accumulation conditions and sweet spot control factors of the shallow shale gas in this area, it is found that the accumulation and productivity potential of shale gas in the mountainous area with complex structure outside basin are controlled by five factors: (1) The gas rich area has weak tectonic reconstruction and good preservation conditions on the whole, taking on typical anticline trap occurrence mode. (2) The gas-rich area is in over-pressure state and high in shale gas content. (3) The gas rich area has high quality shale and thus superior source rock condition. (4) The gas-rich area has high quality reservoirs dominated by classⅠ. (5) The shale in the gas-rich area has high content of brittle minerals and small difference between maximum and minimum horizontal stresses which are conducive to hydraulic fracturing. The innovative practice and core technologies formed during the exploration and production capacity construction of shallow shale gas in the Zhaotong demonstration zone have great reference significance for shallow shale gas exploration and development in other areas.

Key words： shallow shale gas; Silurian Longmaxi Formation; Ordovician Wufeng Formation; exploration breakthrough; Taiyang anticline area; Zhaotong area; anticline

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