四川盆地中二叠统沉积相模式及有利储集体分布

doi:10.11743/ogg20190215

石油与天然气地质 ›› 2019, Vol. 40 ›› Issue (2): 369-379.doi: 10.11743/ogg20190215

四川盆地中二叠统沉积相模式及有利储集体分布

黎荣^1,2,3, 胡明毅^1,2,3, 杨威⁴, 刘满仓⁴

1. 长江大学沉积盆地研究中心, 湖北武汉 430100;
2. 长江大学油气资源与勘探技术教育部重点实验室, 湖北武汉 430100;
3. 非常规油气湖北省协同创新中心, 湖北武汉 430100;
4. 中国石油勘探开发研究院, 北京 100083

收稿日期:2018-06-25 修回日期:2018-11-29 出版日期:2019-04-28 发布日期:2019-01-23
通讯作者: 胡明毅(1965-),男,教授,博士生导师,沉积学和层序地层学。E-mail:humingyi65@163.com。 E-mail:humingyi65@163.com
作者简介:黎荣(1989-),女,博士研究生,沉积学和层序地层学。E-mail:526357227@qq.com。
基金资助:
国家自然科学基金项目（41772103）；国家科技重大专项（2016ZX05007-002）；湖北省创新群体基金项目（2015CFA024）；湖北省教育厅科学技术研究计划重点项目（D20171302）。

Sedimentary facies model and favorable reservoir distribution of the Middle Permian in Sichuan Basin

Li Rong^1,2,3, Hu Mingyi^1,2,3, Yang Wei⁴, Liu Mancang⁴

1. Research Center of Sedimentary Basins, Yangtze University, Wuhan, Hubei 430100, China;
2. Key Laboratory of Oil and Gas Resources and Exploration Technology(Yangtze University), Ministry of Education, Wuhan, Hubei 430100, China;
3. Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, Hubei 430100, China;
4. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China

Received:2018-06-25 Revised:2018-11-29 Online:2019-04-28 Published:2019-01-23

摘要/Abstract

摘要： 近年来四川盆地中二叠统栖霞组和茅口组勘探取得一些突破，显示该区中二叠统巨大的天然气勘探前景。前人对该区中二叠统沉积相和储层等做了大量研究，但对中二叠统栖霞组和茅口组沉积相类型和沉积相模式存在较大分歧，进而制约了有利储集体分布预测研究。文章结合近期一些新钻井和地震资料综合分析基础上，通过岩石学特征、沉积构造和生物化石等相标志分析，认为四川盆地中二叠统栖霞组和茅口组主要发育台地边缘相、开阔台地相和台洼相，其中中二叠统栖霞组早期以碳酸盐岩台地模式为主，栖霞组中晚期和茅口组演变为镶边台地和孤立台凹模式。该区主要发育有台缘滩和台内滩两类主要的储集体，且主要集中在层序高位体系域，台缘滩储集体主要分布在Sq1-HST期雅安-绵竹和剑阁-广元等区带，以及Sq2-HST时期雅安-绵竹-广元区带；台内滩储集体主要分布在Sq1-HST和Sq2-HST期川中高石梯-磨溪区块，以及Sq2-HST时期的威远-自贡区带，Sq2-HST时期高石梯-磨溪区块台内滩储集体受古岩溶和构造热液叠加影响呈条带状展布。四川盆地中二叠统台缘滩和台内滩分布范围较广，具有良好的勘探前景。

关键词: 高位体系域, 台缘滩, 台内滩, 沉积相模式, 中二叠统, 四川盆地

Abstract: Some breakthroughs have been made in the exploration of the Middle Permian Qixia and Maokou Formations in the Sichuan Basin in recent years,indicating great prospects for gas explorationin the Middle Permian of this area.Previous studies focused on sedimentary facies and reservoirs of the Middle Permian in this area,but there are many differences in terms of the types and model of sedimentary facies of the Middle Permian Qixia and Maokou Formations.This has restricted the prediction of favorable reservoir distribution.Therefore,we carried out facies marker analysis including petrologic feature,sedimentary structure and biological fossil,based on the comprehensive study of some latest drilling and seismic data.The results show that the major sedimentary facies of the Middle Permian Qixia and Maokou Formations include platform margin,open-platform and intra-platform sag,among which the carbonate platform is dominant in the lower Qixia Formation of the Middle Permian,while rimmed platform and isolated intra-platform sag dominate the middle and upper Qixia Formation as well as in the Maokou Formation.The reservoirs of the study area are mainly marginal-platform and intra-platform shoals,concentrating in highstand system tracts.The marginal-platform shoal reservoirs mainly occur in areas including Ya'an-Mianzhu and Jiange-Guangyuan during the Sq1-HST period,and Ya'an-Mianzhu-Guangyuan area during the Sq2-HST period;the intra-platform shoal reservoirs are mainly distributed in the Gaoshiti-Moxi block in the central Sichuan Basin during the Sq1-HST and Sq2-HST periods,and Weiyuan-Zigong area during the Sq2-HST period.The intra-platform shoal reservoirs in Gaishiti-Moxi block during the Sq2-HST period are distributed in the form of strips due to the joint influences of paleokarst and tectonic hydrothermal fluids.The marginal-platform and intra-platform shoals are widely distributed in the Middle Permian of Sichuan Basin,and have bright prospects for hydrocarbon exploration.

Key words: highstand system tract, marginal-platform shoal, intra-platform shoal, sedimentary facies model, Middle Permian, Sichuan Basin

中图分类号:

TE121.3

黎荣,胡明毅,杨威,等. 四川盆地中二叠统沉积相模式及有利储集体分布[J]. 石油与天然气地质, 2019, 40(2): 369-379. doi: 10.11743/ogg20190215 Li Rong,Hu Mingyi,Yang Wei,et al. Sedimentary facies model and favorable reservoir distribution of the Middle Permian in Sichuan Basin[J]. Oil & Gas Geology, 2019, 40(2): 369-379. doi: 10.11743/ogg20190215

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四川盆地中二叠统沉积相模式及有利储集体分布

Sedimentary facies model and favorable reservoir distribution of the Middle Permian in Sichuan Basin

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