致密油藏不同开发方式原油动用规律实验研究

潘伟义; 郎东江; 伦增珉; 吕成远; 赵淑霞; 王海涛; 赵清民

doi:10.15953/j.1004-4140.2016.25.06.04

致密油藏不同开发方式原油动用规律实验研究

1. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
2. 中国石化石油勘探开发研究院, 北京 100083

基金项目:

国家重大科技专项（2016ZX05048）；国家自然科学基金项目（51504283）。

详细信息

作者简介:
潘伟义^*(1980-),男,硕士,中国石化石油勘探开发研究院实验研究中心高级工程师,主要从事油气田开发实验和提高采收率技术研究工作,Tel:010-82311615,E-mail:panwy.syky@sinopec.com。

中图分类号: P631
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出版历程
- 收稿日期: 2016-05-17
- 网络出版日期: 2022-12-04
- 发布日期: 2016-12-24

Experimental Study of Effective Displacement Characteristics of Different Displacing Methods in Tight Oil Reservoir

1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China,;
2. Exploration & Production Research Institute of SINOPEC, Beijing 100083, China

摘要

摘要: 致密油是重要的非常规石油资源,但由于其一次采收率低,需要开展提高采收率研究。由于致密油储层孔隙结构复杂,不同孔隙对产量的贡献差异很大,需要深入研究不同孔隙中原油的动用情况进而优化开发方式。本文采用核磁共振测试与驱替实验相结合的方法开展研究,直观反映不同注入条件下注入介质与原油的驱替过程,明确了注水和注CO₂两种开发方式不同孔隙中原油的动用规律。结果表明:水驱和CO₂驱不同孔隙区间原油动用程度随着驱替压差逐渐增大而增大;水驱和CO₂驱大孔隙中的原油绝大部分被动用,随着孔隙半径逐渐减小,原油动用的比例逐渐降低;小于0.01μm微小孔隙中CO₂驱动用效果明显好于水驱,致密油藏中CO₂更易进入小孔隙提高致密油采收率。
- 致密油 /
- 核磁共振测试 /
- 水驱 /
- CO₂驱 /
- 动用规律
Abstract: Tight oil is an important unconventional hydrocarbon resource. Its low recovery of primary production induces the necessities of enhanced oil recovery researches. Due to the complex pore structure of tight oil reservoir, the contribution of different pores is different. So it is necessary to study effective displacement in different pores and optimize development mode. In this study, nuclear magnetic resonance(NMR) and core flood tests were conducted to experimentally simulate different displacing methods(CO₂ flooding and waterflooding), and to evaluate effective displacement of different pores. The tests results indicated that effective displacement of different pores of CO₂ flooding and waterflooding increases with an increasing pressure drawdown. Most of the oil in large pores was displaced. As the pore radius turned small, displaced oil gradually decreased. In the pores with radius less than 0.01 μm, effective displacement of CO₂ flooding was better than that of waterflooding. In tight oil reservoir CO₂ was easier to enter the small pores to enhance oil recovery.
- tight oil /
- nuclear magnetic resonance /
- waterflooding /
- CO₂ flooding /
- effective displacement characteristics

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