天然气地球科学

• 天然气地质学 • 上一篇    下一篇

四川盆地常规天然气地质条件、资源潜力及勘探方向

朱华,杨光,苑保国,应丹琳,戴鑫,周红飞,徐世琦,谈健康   

  1. 中国石油西南油气田分公司勘探开发研究院,四川 成都 610041
  • 收稿日期:2018-07-27 修回日期:2018-09-11 出版日期:2018-10-10
  • 通讯作者: 杨光(1962-),男,广西玉林人,教授级高级工程师,硕士,主要从事四川盆地油气勘探研究及科研管理工作. E-mail:yang_guang@petrochina.com.cn.
  • 作者简介:朱华(1985-),女,四川自贡人,工程师,硕士,主要从事四川盆地烃源岩评价及资源评价研究. E-mail:zhuhua01@petrochina.com.cn.
  • 基金资助:
    中国石油天然气集团公司重大科技专项“第四次油气资源评价—四川盆地第四次油气资源评价”(编号:2013E-050208)资助.

Geological conditions,resource potential and exploration direction of conventional gas in Sichuan Basin

Zhu Hua,Yang Guang,Yuan Bao-guo,Ying Dan-lin,Dai Xin,Zhou Hong-fei,Xu Shi-qi,Tan Jian-kang   

  1. Research Institute of Petroleum Exploration and Development,PetroChina Southwest Oil and Gas Field Company,Chengdu 610041,China
  • Received:2018-07-27 Revised:2018-09-11 Online:2018-10-10

摘要: 四川盆地纵向上从震旦系—侏罗系共发现了包括常规天然气、致密气、页岩气、致密油4种类型的工业油气流,其中常规气主要发育于中三叠统雷口坡组及其以下的海相碳酸盐岩地层中,为了预测四川盆地常规天然气未来勘探方向,在系统总结四川盆地常规天然气地质条件、成藏富集规律的基础上,评价盆地常规天然气资源潜力,明确剩余资源空间分布。结果表明:①四川盆地具有构造分区明显、4套广覆式烃源层、多套大面积孔隙型储层发育的常规天然气地质条件;②常规天然气富集主要受优质烃源岩、台缘和台内高能滩相、古构造和成藏组合等因素的控制,具有大气田近源分布、相带控储、古侵蚀面改善储渗条件、继承性古隆起控制油气富集和运移、优越的成藏组合有利于形成大中型气藏等特点;③基于盆地常规天然气地质条件,立足于“层”,运用成因法、统计法及特尔菲综合法,预测四川盆地常规天然气地质资源量为12.5×1012m3。结合剩余资源空间分布特征,指出了四川盆地未来的总体勘探方向是:层系上主攻灯影组、龙王庙组及中二叠统勘探领域;区块上发展川中、川东地区,挖潜川南地区,开拓川西、川北地区。

关键词: 四川盆地, 常规天然气, 地质条件, 富集规律, 资源潜力, 剩余资源分布, 勘探方向

Abstract: After half a century’s exploration,four types of commercial hydrocarbon flow-the conventional gas,tight gas,shale gas and tight oil are found from Sinian to Jurassic vertically in the Sichuan Basin.The conventional gas was found in Leikoupo Formation of Middle Triassic and the marine carbonate rock stratigraphy which is below Leikoupo Formation.To predict the future exploration direction of conventional gas,we summarize the geological conditions and concentration basically,then evaluate the conventional gas resource potential and analyze the residual resource distribution.The results indicate that:(1)Conventionalgas geological conditions have obvious tectonic division,and there are four sets of extensive hydrocarbon source beds and many sets of pore reservoirs in Sichuan Basin.(2)Conventional gas enrichment is mainly controlled by high quality source rocks,sedimentary facies of platform edge and high energy shoal inside the platform,paleo-tectonics and reservoir combination,etc.,and is characterized by that near source distribution of large gas fields.Sedimentary facies zone controlled reservoirs,ancient erosion surfaces improved reservoir and permeability conditions,and inherited ancient uplift controlled oil and gas accumulation.Migration ascendant reservoir combination is favorable for the formation of large and middle scale gas fields.(3)The basic conventional gas geological conditions based on the “layer”,using the genetic method,statistical method,Delphi synthesis,reveal that conventional gas resources are 12.5×1012m in Sichuan Basin.Combined with the distribution characteristics of the residual resources,this paper points out the general exploration direction of Sichuan Basin in the future.The main exploration strata are Dengying Formation,Longwangmiao Formation and Middle Permian;the central and eastern areas of Sichuan Basin will be developed,the southern areas of Sichuan will be excavated,and the western and northern areas of Sichuan Basin will be explored.

Key words: Sichuan Basin, Conventional gas, Geological conditions, Accumulation rule, Resources potential, Residual resource distribution, Exploration direction

中图分类号: 

  • TE132.1
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