基于高压压汞和核磁共振的致密砂岩渗透率预测

doi:10.12108/yxyqc.20200312

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (3): 122–132.doi: 10.12108/yxyqc.20200312

基于高压压汞和核磁共振的致密砂岩渗透率预测

程辉¹, 王付勇¹, 宰芸¹, 周树勋²

1. 中国石油大学(北京)非常规油气科学技术研究院, 北京 102249;
2. 中国石油长庆油田分公司油田开发事业部, 西安 710021

收稿日期:2019-10-08 修回日期:2019-12-20 出版日期:2020-05-21 发布日期:2020-04-30
第一作者:程辉(1996-),男,中国石油大学(北京)在读硕士研究生,研究方向为非常规油气藏开发与提高采收率。地址:(102249)北京市昌平区中国石油大学(北京)非常规油气科学技术研究院。Email:1650865147@qq.com
通信作者: 王付勇(1985-),男,博士,副研究员,主要从事非常规油气藏开发与提高采收率、油气藏动态监测等方面的研究工作。Email:wangfuyong@cup
基金资助:
国家自然科学基金项目“表面活性剂在致密油藏裂缝-微纳米孔隙中的多尺度渗吸驱油机理研究”（编号：51874320）和中国石油大学（北京）青年拔尖人才科研启动基金项目“致密油藏渗吸提高采收率机理研究”（编号：2462017BJB11）联合资助

Prediction of tight sandstone permeability based on high-pressure mercury intrusion（HPMI）and nuclear magnetic resonance（NMR）

CHENG Hui¹, WANG Fuyong¹, ZAI Yun¹, ZHOU Shuxun²

1. The Unconventional Oil and Gas Institute, China University of Petroleum(Beijing), Beijing 102249, China;
2. Oilfield Development Division, PetroChina Changqing Oilfield Company, Xi'an 710021, China

Received:2019-10-08 Revised:2019-12-20 Online:2020-05-21 Published:2020-04-30

摘要/Abstract

摘要： 分析影响致密砂岩渗透率的主控因素并准确预测致密砂岩渗透率对致密油气藏的开发具有重要意义。以鄂尔多斯盆地延长组致密砂岩为研究对象，基于高压压汞和核磁共振对致密砂岩渗透率主控因素进行了研究，分别评价并优选了更适用于致密砂岩的基于高压压汞和核磁共振的渗透率预测模型。结果表明：影响致密砂岩渗透率的主要因素是孔喉半径，其中中值孔喉半径与致密砂岩渗透率相关性最强；与核磁共振T₂加权平均值相比，T₂几何均值与致密砂岩渗透率的相关性更强；在3种不同的核磁共振渗透率预测模型中，SDR-REV模型的预测效果要优于SDR模型和KCT_2w模型；在3种不同的高压压汞渗透率预测模型中，基于r₄₀和r₄₅的Winland模型渗透率预测精度较高。研究成果对鄂尔多斯盆地延长组致密砂岩的进一步有效开发具有指导意义。

关键词: 致密砂岩, 渗透率, 高压压汞, 核磁共振, 延长组, 鄂尔多斯盆地

Abstract: It is of great significance for the development of tight oil and gas reservoir to analyze the main factors affecting the permeability of tight sandstone and accurately predict the permeability of tight sandstone. Taking the tight sandstone from Yanchang Formation in Ordos Basin as the research subject,the main controlling factors of tight sandstone permeability were studied based on high-pressure mercury intrusion(HPMI) and nuclear magnetic resonance(NMR). The permeability prediction models based on NMR and HPMI were evaluated and optimized respectively. The results show that pore-throat size is the main factor affecting tight sandstone permeability,and the median pore-throat radius size has strongest correlation with tight sandstone permeability. Compared with NMR weighted average T₂,geometric mean T₂ has stronger correlation with tight sandstone permeability. Among the three different NMR permeability prediction models,SDR-REV model has better permeability prediction results compared with SDR model and KCT_2w model. Among the three different HPMI permeability prediction models,the Winland model based on r₄₀ and r₄₅ has the highest permeability prediction results. The research results have guiding significance for the further effective development of tight sandstones of Yanchang Formation in Ordos Basin.

Key words: tight sandstone, permeability, high-pressure mercury intrusion, nuclear magnetic resonance, Yanchang Formation, Ordos Basin

中图分类号:

TE122.2

程辉, 王付勇, 宰芸, 周树勋. 基于高压压汞和核磁共振的致密砂岩渗透率预测[J]. 岩性油气藏, 2020, 32(3): 122–132.

CHENG Hui, WANG Fuyong, ZAI Yun, ZHOU Shuxun. Prediction of tight sandstone permeability based on high-pressure mercury intrusion（HPMI）and nuclear magnetic resonance（NMR）[J]. Lithologic Reservoirs, 2020, 32(3): 122–132.

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基于高压压汞和核磁共振的致密砂岩渗透率预测

Prediction of tight sandstone permeability based on high-pressure mercury intrusion（HPMI）and nuclear magnetic resonance（NMR）

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