西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (2): 18-31.DOI: 10.11885/j.issn.1674-5086.2024.04.27.01

• 地质勘探 • 上一篇    下一篇

泸州古隆起嘉陵江组一段滩相薄储层分布规律

唐浩1, 廖子超1, 孙豪飞2, 徐唱2, 陈骁2   

  1. 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;
    2. 中国石油西南油气田公司勘探开发研究院, 四川 成都 610041
  • 收稿日期:2024-04-27 发布日期:2025-05-15
  • 通讯作者: 唐浩,E-mail:thufocom@163.com
  • 作者简介:唐浩,1989年生,男,汉族,四川成都人,副教授,博士,主要从事油气地质综合研究。E-mail:thufocom@163.com
    廖子超,1999年生,男,汉族,广东汕尾人,硕士研究生,主要从事油气地质综合研究。E-mail:swhenzhuang926230@qq.com
    孙豪飞,1989年生,男,汉族,四川成都人,高级工程师,硕士,主要从事油气地质研究与勘探部署工作。E-mail:sunhaofei@petrochina.com.cn
    徐唱,1996年生,男,汉族,湖北黄冈人,工程师,硕士,主要从事油气地质研究与勘探部署工作。E-mail:xc405@petrochina.com.cn
    陈骁,1983年生,男,汉族,四川成都人,高级工程师,硕士,主要从事地震地质综合研究与油气勘探部署等方面的研究工作。E-mail:cxjeff@petrochina.com.cn
  • 基金资助:
    中国石油西南油气田公司项目(XNSJS2023-078);国家自然科学基金(42102190);中国石油天然气集团有限公司上游领域基础性前瞻性项目(2021DJ0501)

Distribution of the Thin Reservoir of Shoal Facies at the Top of Member 1 of the Jialingjiang Formation in Luzhou Palaeohigh

TANG Hao1, LIAO Zichao1, SUN Haofei2, XU Chang2, CHEN Xiao2   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Exploration and Development Research Institute, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610041, China
  • Received:2024-04-27 Published:2025-05-15

摘要: 泸州古隆起下三叠统嘉陵江组一段—嘉陵江组二段古油藏是四川盆地重要的原油资源,其中,嘉陵江组一段顶部滩相薄储层分布规律长期认识不清。基于岩芯、岩屑和测井资料,通过开展储层表征、储层成因分析和古地貌重建,明确了其平面展布规律。研究表明:1) 储层以薄—中层鲕粒、生屑灰岩为主,粒内溶孔、铸模孔为主要储集空间,物性总体较差,但发育局部高孔渗层。2) 准同生期大气淡水溶蚀是储层形成的主要动力,易发育颗粒滩沉积和遭受准同生岩溶的沉积古地貌高地是控制储层发育的关键。3) 录井统计表明,嘉陵江组一段顶部颗粒岩厚度与地层厚度正相关,说明地层厚薄反映沉积古地貌高低,据此认为泸州古隆起核部、康滇古陆东缘和川中古隆南部这3个主要的地层增厚区是储层发育的有利区带。研究可供嘉陵江组古油藏勘探开发参考,也为国内外滩相薄储层展布研究提供实例。

关键词: 碳酸盐岩, 滩相储层, 嘉陵江组, 泸州古隆起, 四川盆地

Abstract: The first Member and second Member of the Lower Triassic Jialingjiang Formation in Luzhou Paleouplift are the main oil resources in Sichuan Basin, however, the reservoir especially the thin shoal reservoir distribution is not clear yet, which restricts oil exploration process. Based on core, cuttings and well logging data, this paper researches reservoir characteristics, reservoir genesis mechanism and paleogeomorphology, and get the following results. The reservoir lithology is mainly composed of thin-middle oolitic and bioclastic limestone, and the main reservoir space is the dissolved intragranular pores and moldic pores. The physical properties are generally poor, but high porosity and permeability layers are developed locally. The leaching of meteoric water is the main reservoir genesis mechanism, while paleouplift is the key to form reservoir by depositing grain shoals and syngenetic karstification. The well logging statistics show that the thickness of granulated rock in the first Member of Jialingjiang Formation is positively correlated with the thickness of strata, which indicates that the thickness of strata reflects the level of sedimentary palaeotopography. Therefore, it is considered that the central of Luzhou palaeouplift, the eastern margin of Kangdian palaeocontinental and the southern area of the central Sichuan palaeouplift are three main favorable areas for reservoir development. This research can be used as reference for the exploration and development of Jialingjiang Formation in Sichuan Basin, and more important it can also provide a case study for the distribution of thin shoal reservoir in the world.

Key words: carbonates, shoal facies reservoir, Jialingjiang Formation, Luzhou Paleouplift, Sichuan Basin

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