岩性油气藏 ›› 2025, Vol. 37 ›› Issue (1): 115–125.doi: 10.12108/yxyqc.20250110

• 地质勘探 • 上一篇    下一篇

玛湖凹陷二叠系风城组页岩油储层特征及高产主控因素

钱永新1, 赵毅1, 刘新龙1, 刘鸿2, 刘国梁1, 朱涛1, 邹阳1, 陈方文3   

  1. 1. 中国石油新疆油田公司 勘探开发研究院, 新疆 克拉玛依 834000;
    2. 中国石油新疆油田公司 数据公司, 新疆 克拉玛依 834000;
    3. 中国石油大学(华东)深层油气全国重点实验室, 山东 青岛, 266580
  • 收稿日期:2023-08-18 修回日期:2024-10-11 出版日期:2025-01-01 发布日期:2025-01-04
  • 第一作者:钱永新（1972—），男，硕士，工程师，主要从事页岩油地质方面的研究工作。地址：（83400）新疆维吾尔自治区克拉玛依市克拉玛依区新疆油田公司勘探开发研究院。Email：Qyx@petrochina.com.cn。
  • 通信作者: 陈方文（1984—），男，博士，副教授，主要从事页岩油气勘探方面的教学与研究工作。Email:chenfw@upc.edu.cn。
  • 基金资助:
    中国石油天然气股份有限公司重大科技专项“陆相页岩油规模增储上产与勘探开发技术研究”（编号：2023ZZ15YJ01）与山东省自然科学基金项目“页岩油原位改质开采”（编号：ZR2022YQ30）联合资助。

Reservoir characteristics and high yield control factors of Permian Fengcheng Formation shale oil reservoir in Mahu Sag

QIAN Yongxin1, ZHAO Yi1, LIU Xinlong1, LIU Hong2, LIU Guoliang1, ZHU Tao1, ZOU Yang1, CHEN Fangwen3   

  1. 1. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay 83400, Xinjiang, China;
    2. Data Company, PetroChina Xinjiang Oilfield Company, Karamay 83400, Xinjiang, China;
    3. State Key Laboratory of Deep Oil and Gas, China University of Petroleum(East China), Qingdao 266580, Shandong, China
  • Received:2023-08-18 Revised:2024-10-11 Online:2025-01-01 Published:2025-01-04

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摘要： 通过岩石薄片、扫描电镜、低温氮气吸附、高压压汞、岩心荧光、激光共聚焦显微镜和产液剖面等实验分析测试资料，对玛湖凹陷二叠系风城组储层特征及页岩油高产主控因素进行了详细研究。研究结果表明：①玛湖凹陷二叠系风城组页岩油储层类型可划分为砂岩类、白云岩类和泥岩类等，粉砂岩类储层以陆源碎屑沉积物为主，泥岩类储层以陆源-内源混积物为主，白云（灰）岩类储层以内源化学沉积为主；玛湖凹陷风城组粉砂岩类、白云岩类和泥岩类储层孔隙喉道尺寸依次减小，孔隙连通性依次变差。②玛湖凹陷风城组粉砂岩类储层含油性最好，其次是泥岩类储层，白云岩类储层含油性最差，孔径较大的孔隙和微裂缝中的游离油含量较高，孔径较小的孔隙中的吸附油含量较高。③玛湖凹陷风城组优质烃源岩和优质储层分别控制着页岩油的高产区域和高产层段，长英质矿物含量、有效孔隙度值、游离油孔隙度值、裂缝密度和脆性指数等均较高的储层是页岩油高产的有利层段。

关键词: 页岩油储层, 低温氮气吸附, 孔径分布, 游离油, 吸附油, 裂缝密度, 脆性指数, 风城组, 二叠系, 玛湖凹陷

Abstract: Based on the experimental results of rock slices，scanning electron microscopy，low temperature nitrogen adsorption，high pressure mercury injection，core fluorescence，laser confocal microscopy and liquid production profile，the characteristics and high yield control factors of Permian Fengcheng Formation shale oil reservoir in Mahu Sag were detailed studied. The results show that：（1）The shale oil reservoirs of Permian Fengcheng Formation in Mahu Sag can be divided into sandstone，dolomite and mudstone. Siltstone reservoirs are dominated by terrigenous clastic sediments，mudstone reservoirs are dominated by terrigenous and endogenous mixed deposits，and dolomite（calcite）reservoirs are dominated by endogenous chemical deposits. The throat size distribution ranges of sandstone，dolomite and mudstone reservoir of Fengcheng Formation in Mahu Sag decrease successively，and the pore connectivity of the three lithologic reservoirs deteriorates successively. （2）Siltstone reservoirs have the best oil content，followed by mudstone reservoirs，dolomite reservoirs are the worst of shale oil reservoirs of Permian Fengcheng Formation in Mahu Sag. The proportion of free oil is higher in the larger pores and micro-fractures，and the proportion of adsorbed oil is higher in the smaller pores.（3）High quality source rock and high quality reservoir control the high production area and high production interval of Fengcheng Formation in Mahu Sag，respectively. The shale oil reservoirs with high felsic content，effective porosity，free oil porosity，fracture density and brittleness index are the favorable interval for high production.

Key words: shale oil reservoir, low temperature nitrogen adsorption, pore size distribution, free oil, adsorbed oil, fracture density, brittleness index, Fengcheng Formation, Permian, Mahu Sag

中图分类号: 

  • TE122
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