石油勘探与开发 >

2020 , Vol. 47 >Issue 1: 202 - 212

DOI: https://doi.org/10.11698/PED.2020.01.20

新能源新领域

致密砂岩岩电响应规律与饱和度评价方法

  • 李霞 ,
  • 李潮流 ,
  • 李波 ,
  • 刘学锋 ,
  • 袁超
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  • 1. 中国石油勘探开发研究院,北京 100083;
    2. 中石化胜利石油工程有限公司渤海钻井总公司,山东东营 257200;
    3. 中国石油大学（华东）理学院,山东青岛 266580
李霞（1982-）,女,河南光山人,博士,中国石油勘探开发研究院高级工程师,主要从事碎屑岩与非常规油气储集层岩石物理与测井处理解释方法研究。地址：北京市海淀区学院路20号,中国石油勘探开发研究院测井与遥感技术研究所,邮政编码：100083。E-mail：leexia@petrochina.com.cn

收稿日期: 2019-05-20

  网络出版日期: 2020-01-17

基金资助

中国石油天然气集团有限公司测井基础研究项目（2019A-3608）; 国家自然科学基金资助项目（41874152）

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Response laws of rock electrical property and saturation evaluation method of tight sandstone

  • LI Xia ,
  • LI Chaoliu ,
  • LI Bo ,
  • LIU Xuefeng ,
  • YUAN Chao
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  • 1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. Sinopec Shengli Petroleum Engineering Co., Ltd, Bohai Drilling Corporation, Dongying 257200, China;
    3. College of Science, China University of Petroleum (East China), Qingdao 266580, China

Received date: 2019-05-20

  Online published: 2020-01-17

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摘要

针对致密砂岩储集层在中低含水饱和度下岩石电性响应规律不明确的问题,提出高速离心驱替岩电和不同含水饱和度下核磁共振T2谱联测的实验方法,可驱替渗透率小于0.1×10-3 μm2的致密砂岩岩心,为致密砂岩电性研究提供可靠实验手段。通过开展高分辨率CT扫描、MAPS和Qemscan等配套实验,构建基于多源信息融合的多矿物组分精细三维数字岩心,采用有限元数值模拟方法,得到实验室条件下无法获得的低含水饱和度下致密砂岩电性响应。通过实验与数值模拟相结合,明确了复杂孔隙结构致密砂岩电性响应规律,建立了基于孔隙结构的变岩电参数饱和度评价方法。对鄂尔多斯盆地延长组7段致密砂岩储集层多口井测井资料处理分析表明,该方法能够获得更准确的含油饱和度,为致密砂岩油气测井精细评价提供了新思路和新方法。图13参23

关键词： 致密砂岩; 岩电响应; 核磁共振测井; 饱和度; 岩石物理; 数值模拟

本文引用格式

李霞 , 李潮流 , 李波 , 刘学锋 , 袁超 . 致密砂岩岩电响应规律与饱和度评价方法[J]. 石油勘探与开发, 2020 , 47(1) : 202 -212 . DOI: 10.11698/PED.2020.01.20

Abstract

To solve the problem that the law of rock electrical response under low and medium water saturation in tight sandstone reservoirs is not clear, an experimental method of high-speed centrifugal displacement rock electricity and nuclear magnetic resonance T2 spectrometry under different water saturation was proposed, which can drive the tight sandstone cores with the permeability less than 0.1×10-3 μm2, and provide a reliable experimental means for the study of tight sandstone electrical property. By carrying out supporting experiments such as high-resolution CT scan, MAPS and Qemscan, a multi-mineral component fine three-dimensional digital core based on multi-source information fusion was constructed. The finite element numerical simulation method was used to obtain the electrical response of tight sandstone core with low water saturation which cannot be obtained in laboratory conditions. By combining experiment and numerical simulation, the electrical response laws have been clear of tight sandstone with complex pore structure, and the saturation evaluation method of variable rock electrical parameters based on pore structure has been developed. The processing of logging data of multiple wells in tight sandstone reservoir of Chang 7 Member in the Ordos Basin shows that this method can obtain more accurate oil saturation, and provides a new idea and method for fine logging evaluation of tight sandstone reservoir.

Key words： tight sandstone; rock electrical response; nuclear magnetic resonance logging; saturation; petrophysics; numerical simulation

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