基于核磁与压汞资料的储层孔隙结构特征研究

doi:10.11885/j.issn.1674-5086.2020.11.13.11

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (1): 33-42.DOI: 10.11885/j.issn.1674-5086.2020.11.13.11

基于核磁与压汞资料的储层孔隙结构特征研究

张虔¹, 唐海忠², 牟明洋², 魏军², 曾利刚²

1. 中国石油集团测井有限公司测井应用研究院, 陕西西安 710077;
2. 中国石油玉门油田分公司勘探开发研究院, 甘肃酒泉 735000

收稿日期:2020-11-13 发布日期:2023-02-24
通讯作者: 张虔,E-mail:zhangq_cpl@cnpc.com.cn
作者简介:张虔,1984年生,男,汉族,甘肃会宁人,工程师,硕士,主要从事测井资料评价及应用等方面的研究。E-mail:zhangq_cpl@cnpc.com.cn
唐海忠,1968年生,男,汉族,甘肃武威人,高级工程师,硕士,主要从事油气勘探方面的研究。E-mail:ymtanghz@petrochina.com.cn
牟明洋,1984年生,男,汉族,山东寿光人,工程师,主要从事测井资料精细解释、油气藏综合研究评价研究。E-mail:403486553@qq.com
魏军,1968年生,男,汉族,甘肃会宁人,高级工程师,硕士,主要从事油气勘探方面的研究工作。E-mail:ymweij@petrochina.com.cn
曾利刚,1977年生,男,汉族,四川眉山人,高级工程师,主要从事测井解释方面的研究工作。E-mail:ymzenglg@petrochina.com.cn
基金资助:
中国石油天然气股份有限公司科学研究与技术开发项目（2018D-0704）

A Study on the Characteristics of Reservoir Pore Structure Based on Nand Mercury Injection Data

ZHANG Qian¹, TANG Haizhong², MU Mingyang², WEI Jun², ZENG Ligang²

1. Institute of Well Logging Application, CNPC Logging Co. Ltd., Xi'an, Shaanxi 710077, China;
2. Research Institute of Exploration and Development, Yumen Oilfield Company, PetroChina, Jiuquan, Gansu 735000, China

Received:2020-11-13 Published:2023-02-24

摘要/Abstract

摘要： X1井区位于酒泉盆地营尔凹陷长沙岭构造带，下白垩统下沟组一段（K₁g¹）储层岩石类型主要为岩屑砂岩和长石岩屑砂岩，发育砂泥岩薄互层，储层非均质性强，给储层评价带来较大困难。而流体识别、储层评价及后期开发措施在很大程度上依赖于对储层的孔隙结构的认识。以X1井区为例，对研究区的矿物成分进行统计分析、对电镜薄片观测的孔隙类型进行分类研究，重点根据该井区的压汞及核磁共振T₂谱等测试数据，建立了T₂谱与岩芯孔喉半径的定量计算方法，并结合核磁共振测井资料，形成了连续定量刻画储层孔喉半径变化特征的方法；对孔喉半径的定量刻画，可以为了解储层孔渗的变化提供思路，为研究区储层孔隙结构和储层非均质性研究提供更丰富的信息。

关键词: 核磁共振, 压汞曲线, 孔隙半径, 孔隙结构, T₂谱

Abstract: X1 Wellblock is located in the Changshaling structural belt of Ying'er Sag, Jiuquan Basin. The rock types of this reservoir of the first member in Xiagou Formation of Lower Crataceous are mainly lithic sandstone and feldspar lithic sandstone. Reservoir heterogeneity is strong, and thin interbedded sand and mudstone are especially developed, which brings great difficulties to reservoir comprehensive evaluation. However, fluid identification, reservoir evaluation and later development measures depend on the overall understanding of pore structure of reservoir to a large extent. Taking X1 Wellblock in Changshaling as an example, the statistical analysis was carried out on the mineral composition in the study area, the pore types are classified study of electron microscopic thin section(SEM) observation, and then the key works, under the wellblock of mercury injection and nuclear magnetic resonance T₂ spectrum of test data, established the quantitative calculation methods of core pore throat radius and the T₂ relaxation time spectrum, and connecting with the nuclear magnetic resonance (NMR) logging data. A method for continuously and quantitatively characterizing the variation characteristics of reservoir pore-throat radius is developed. The quantitative characterization of pore-throat radius can provide ideas for us to understand the change of reservoir porosity and permeability, and provide more abundant information for the study of reservoir pore structure and reservoir heterogeneity.

Key words: nuclear magnetic resonance, mercury injection curve, pore radius, pore structure, T₂ spectrum

中图分类号:

TE122

张虔, 唐海忠, 牟明洋, 魏军, 曾利刚. 基于核磁与压汞资料的储层孔隙结构特征研究[J]. 西南石油大学学报(自然科学版), 2023, 45(1): 33-42.

ZHANG Qian, TANG Haizhong, MU Mingyang, WEI Jun, ZENG Ligang. A Study on the Characteristics of Reservoir Pore Structure Based on Nand Mercury Injection Data[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(1): 33-42.

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基于核磁与压汞资料的储层孔隙结构特征研究

A Study on the Characteristics of Reservoir Pore Structure Based on Nand Mercury Injection Data

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