岩心核磁共振实验对低孔低渗碳酸盐岩储层的适应性研究

朱学娟; 张向明; 单沙沙

doi:10.11938/cjmr20192741

波谱学杂志 >

2020 , Vol. 37 >Issue 3: 349 - 359

DOI: https://doi.org/10.11938/cjmr20192741

低场磁共振技术与应用专栏

岩心核磁共振实验对低孔低渗碳酸盐岩储层的适应性研究

朱学娟 ,
张向明 ,
单沙沙

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1. 中国石油大学胜利学院油气工程学院, 山东东营 257061;
2. 中海油田服务股份有限公司物探事业部, 天津 300451;
3. 中国石油集团测井有限公司油气评价中心, 陕西西安 710077

收稿日期: 2019-04-22

网络出版日期: 2019-06-24

基金资助

国家科技重大专项（2017ZX05039002）.

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Evaluation of Core Samples from Low-Porosity and Low-Permeability Carbonate Reservoir with NMR Experiments

ZHU Xue-juan ,
ZHANG Xiang-ming ,
SHAN Sha-sha

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1. Department of Oil&Gas Engineering, Shengli College China University of Petroleum, Dongying 257061, China;
2. Geophysical Prospecting Department, China Oilfield Services Limited, Tianjin 300451, China;
3. Oil and Gas Evaluation Center, China National Petroleum Corporation(CNPC) Logging Co. Ltd., Xi'an 710077, China

Received date: 2019-04-22

Online published: 2019-06-24

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摘要

低孔低渗碳酸盐岩储层矿物成分复杂、岩石骨架参数难以确定、储集空间类型多样、孔隙结构及孔渗关系复杂、常规测井曲线响应特征不明显，使其测井评价极其困难．本文利用核磁共振测井定量评价低孔低渗碳酸盐岩储层岩心的孔隙结构、计算储层参数．利用T₂谱分布曲线分析孔隙结构、计算T₂截止值；在此基础上计算岩心总孔隙度、有效孔隙度、束缚水孔隙度、渗透率等储层参数，并与常规岩心实验结果进行对比分析；最后，总结出核磁共振测井在低孔低渗储层中的应用优势与局限，为核磁共振测井评价模型的建立提供基础数据．

关键词： 低孔低渗储层; 碳酸盐岩; 岩心核磁共振实验; 孔隙结构

本文引用格式

朱学娟 , 张向明 , 单沙沙 . 岩心核磁共振实验对低孔低渗碳酸盐岩储层的适应性研究[J]. 波谱学杂志, 2020 , 37(3) : 349 -359 . DOI: 10.11938/cjmr20192741

Abstract

Well logging evaluation of the low-porosity and low-permeability carbonate reservoir is difficult because of its complex mineral composition, difficult to determine rock skeleton parameters, diverse types of reservoir space, complex pore structure and pore-permeability relationship, and unobvious response characteristics of conventional logging curves. In order to quantitatively evaluate the pore structure and calculate the reservoir parameters by nuclear magnetic resonance (NMR) logging, NMR experiments on the core samples from low-porosity and low-permeability reservoir were performed. The pore structure was analyzed from the NMR data, and a T₂ cutoff value was calculated using the T₂ spectrum distribution curve. With the NMR method, the total porosity, effective porosity, bound water porosity, permeability and other reservoir parameters of the core samples were determined and compared with the results obtained with the conventional core experiments. The advantages and limitations of NMR methods in evaluating the low-porosity and low-permeability reservoirs were summarized.

Key words： low-porosity and low-permeability reservoir; carbonate; core NMR experiment; pore structure

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