石油勘探与开发 >

2020 , Vol. 47 >Issue 4: 750 - 755

DOI: https://doi.org/10.11698/PED.2020.04.11

油气田开发

盐间页岩油储集层盐溶作用岩心实验评价

  • 杨正明 ,
  • 李睿姗 ,
  • 李海波 ,
  • 骆雨田 ,
  • 陈挺 ,
  • 高铁宁 ,
  • 张亚蒲
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  • 1.中国石油勘探开发研究院渗流流体力学研究所,北京 100083;
    2.中国科学院大学,北京 100493;
    3.江汉油田勘探开发研究院,武汉 430223
杨正明（1969-）,男,博士,江苏盐城人,中国石油勘探开发研究院教授级高级工程师,主要从事低渗透油气藏/致密油气的物理模拟、渗流理论和三次采油方面的研究工作。地址：北京市海淀区学院路20号,中国石油勘探开发研究院渗流流体力学研究所,邮政编码：100083。E-mail: yzhm69@petrochina.com.cn

收稿日期: 2019-08-27

  修回日期: 2020-04-09

  网络出版日期: 2020-07-20

基金资助

国家油气重大专项（2017ZX05013-001,2017ZX05049-005）; 中国石油天然气集团有限公司重大基础科技攻关课题（2018B-4907）

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Experimental evaluation of the salt dissolution in inter-salt shale oil reservoirs

  • YANG Zhengming ,
  • LI Ruishan ,
  • LI Haibo ,
  • LUO Yutian ,
  • CHEN Ting ,
  • GAO Tiening ,
  • ZHANG Yapu
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  • 1. Institute of Porous Flow & Fluid Mechanics, PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. University of Chinese Academy of Sciences, Beijing 100493, China;
    3. Research Institute of Exploration and Development, Jianghan Oilfield Company, Wuhan 430223, China

Received date: 2019-08-27

  Revised date: 2020-04-09

  Online published: 2020-07-20

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摘要

利用盐溶实验、渗吸实验和高温高压核磁共振在线测试等方法,建立了盐间页岩含油岩心盐溶作用评价方法,并分析了盐溶作用对自发渗吸和渗透率的影响。通过对比不同时刻测试的核磁共振T2（横向弛豫时间）图谱信号量和分布特征,定量评价盐溶作用强度：在盐溶实验中,随着注入水不断浸入岩心,岩心中的盐逐渐溶解;盐间页岩含油岩心自发渗吸实验可分为强渗吸弱盐溶、强盐溶促渗吸和弱盐溶弱渗吸3个阶段,自发渗吸中的盐溶作用非常明显,盐溶采出程度贡献率在60%以上;盐间页岩含油岩心内部不同横截面或不同部位的微观孔隙结构分布不均匀,盐溶后孔隙体积增大,孔隙度增加,渗透率也增加。图7表5参24

关键词： 页岩油; 盐溶作用; 渗吸作用; 物理模拟; 核磁共振

本文引用格式

杨正明 , 李睿姗 , 李海波 , 骆雨田 , 陈挺 , 高铁宁 , 张亚蒲 . 盐间页岩油储集层盐溶作用岩心实验评价[J]. 石油勘探与开发, 2020 , 47(4) : 750 -755 . DOI: 10.11698/PED.2020.04.11

Abstract

By using salt dissolution experiment, imbibition experiment and high temperature and high pressure nuclear magnetic resonance (NMR) on-line test, the evaluation methods for salt dissolution of inter salt shale oil-bearing cores were established, and the effects of salt dissolution on spontaneous imbibition and permeability were analyzed. The intensity of salt dissolution is quantitatively evaluated by comparing the signal quantity and distribution characteristics of T2 spectrum (transverse relaxation time) measured at different times. In salt dissolution experiment, salt in the core is gradually dissolved as the injected water is continuously immersed in the core. The spontaneous imbibition experiment of inter-salt shale oil-bearing core can be divided into three stages: strong imbibition and weak salt dissolution, strong salt dissolution promoting imbibition, and weak salt dissolution and weak imbibition. The salt dissolution in spontaneous imbibition is very obvious, and the salt dissolution contributes more than 60% of recovery. The micro-pore structure in different cross sections or different parts of inter-salt shale oil-bearing core isn’t uniform, and the pore volume, porosity and permeability increase after salt dissolution.

Key words： shale oil; salt dissolution; imbibition; physical simulation; nuclear magnetic resonance

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