注烃气开发油藏流体相态时变特征及开发技术对策

陈利新; 江同文; 黎开奋; 林清金; 刘昕哲; 潘毅; 姚杰; 吴克柳

doi:10.3969/j.issn.1006-6535.2025.05.010

特种油气藏 >

2025 , Vol. 32 >Issue 5: 85 - 92

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.05.010

油藏工程

注烃气开发油藏流体相态时变特征及开发技术对策

陈利新 ,
江同文 ,
黎开奋 ,
林清金 ,
刘昕哲 ,
潘毅 ,
姚杰 ,
吴克柳

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1.中国石油塔里木油田分公司,新疆库尔勒 841000;
2.中国石油天然气集团公司,北京 100724;
3.中国石油大学(北京)油气资源与工程全国重点实验室,北京 102249;
4.西南石油大学油气藏地质及开发工程全国重点实验室,四川成都 610500

陈利新(1978—),男,高级工程师,2001年毕业于兰州大学地质学专业,2024年毕业于中国石油大学(北京)能源与环保专业,获博士学位,现从事碳酸盐岩油气藏地质研究及管理工作。

收稿日期: 2024-05-13

修回日期: 2025-07-14

网络出版日期: 2025-10-30

基金资助

国家自然科学基金“非常规储层纳米孔中水驱气动态润湿机理与传输特性”(52174041);北京市自然科学基金“非常规储层纳米孔水传输研究”(3232029)

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Time-varying phase behavior characteristics of reservoir fluids and development technical strategies for hydrocarbon gas injection development

CHEN Lixin ,
JIANG Tongwen ,
LI Kaifen ,
LIN Qingjin ,
LIU Xinzhe ,
PAN Yi ,
YAO Jie ,
WU Keliu

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1. PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000, China;
2. China National Petroleum Corporation,Beijing 100724, China;
3. State Key Laboratory of Oil and Gas Resources and Engineering, China University of Petroleum (Beijing),Beijing 102249, China;
4. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500, China

Received date: 2024-05-13

Revised date: 2025-07-14

Online published: 2025-10-30

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摘要

针对油藏注烃气开发过程中对地层流体相态时变特征影响驱油效果机理认识不足,难以开展精细调控、提高采收率的问题,通过典型井流体高压物性实验,明确了注烃气开发过程中地层流体相态时变特征;基于时变的流体相态,开展流体相态变化对驱油效果影响的油藏数值模拟研究,制订并优化了考虑油藏相态时变特征的典型井组注烃气开发的技术对策。研究表明:注烃气开发后,储层中的气驱前缘原油变轻,气驱后缘剩余油变重;注烃气开发过程中,生产井附近储层中的轻质油流体特征转变为挥发油流体特征;与注贫烃气相比,注富烃气可以降低气驱后缘的油气界面张力,提高油气混相程度,从而提高原油采收率。该研究可为油藏注烃气开发技术对策制订提供依据,对油藏注CO₂驱开发和凝析气藏注气开发同样具有重要的借鉴意义。

关键词： 油藏; 注烃气; 相态时变; 提高采收率; 油藏数值模拟

本文引用格式

陈利新 , 江同文 , 黎开奋 , 林清金 , 刘昕哲 , 潘毅 , 姚杰 , 吴克柳 . 注烃气开发油藏流体相态时变特征及开发技术对策[J]. 特种油气藏, 2025 , 32(5) : 85 -92 . DOI: 10.3969/j.issn.1006-6535.2025.05.010

Abstract

Aiming at the insufficient understanding of the mechanism by which the time-varying phase behavior characteristics of formation fluids during hydrocarbon gas injection development affect oil displacement efficiency,making it difficult to conduct fine control and improve oil recovery,high-pressure PVT experiments on typical well fluids were conducted to clarify the time-varying phase behavior characteristics of formation fluids during hydrocarbon gas injection development.Based on the time-varying fluid phase behavior,reservoir numerical simulation studies on the impact of fluid phase behavior changes on oil displacement efficiency were carried out,and technical strategies for hydrocarbon gas injection development in typical well groups considering the time-varying phase behavior characteristics of the reservoir were formulated and optimized.The study shows that after hydrocarbon gas injection development,the crude oil at the gas displacement front in the reservoir becomes lighter,while the residual oil at the gas displacement rear becomes heavier.During hydrocarbon gas injection development,the fluid characteristics of light oil in the reservoir near production wells shift to volatile oil fluid characteristics.Compared with injecting lean hydrocarbon gas,injecting rich hydrocarbon gas can reduce the oil-gas interfacial tension at the gas displacement rear and enhance the degree of oil-gas miscibility,thereby improving oil recovery.This research can provide a basis for formulating technical strategies for hydrocarbon gas injection development in reservoirs and offers important reference significance for CO₂ flooding development in reservoirs and gas injection development in condensate gas reservoirs.

Key words： reservoir; hydrocarbon gas injection; time-varying phase behavior; enhanced oil recovery; reservoir numerical simulation

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