摘要
致密油在世界范围分布广,储量丰富,但开发难度大,开发过程产量递减非常快。即使水平井压裂技术取得了良好的效果,但采收率依旧不高,故需对地层能量进行补充[1]。国内外大量研究表明,注气开发致密油是一种有效提高采收率的方法。随着社会的快速发展,在了解到能源消耗逐年增加,二氧化碳气体日益增多的背景,且通过实验表明二氧化碳具有较低的最小混相压力(MMP)的情况下。人们提出了注二氧化碳来提高原油采收率,并通过实现地质封存来减小环境压力,实现经济效益的方案。本文综述了二氧化碳强化致密油藏开发与地质封存的国内外研究现状,总结了注二氧化碳提高采收率以及地质封存机理,并进行了二氧化碳吞吐的数值模拟,解析了影响吞吐效果的因素;为进一步研究二氧化碳提高致密油采收率与地质封存一体化,缓解环境压力,实现可持续发展,提供了理论依据与基础。
Tight oil is widely distributed in the world and rich in reserves,but its development is difficult and the production decline is very fast during the development process.Even after horizontal well fracturing operation,the recovery factor is still very low,and the formation energy must be supplemented.A large number of research results at home and abroad show that gas injection to develop tight oil is an effective method to improve oil recovery.In addition,with the rapid development of society,under the background of understanding that the consumption of energy is increasing year by year and the CO_(2) gas is increasing day by day,and the experiment shows that CO_(2) has a low MMP.People put forward the plan of injecting CO_(2) to improve crude oil recovery,and reducing environmental pressure through geological storage to achieve economic benefits.This article surveys a large number of documents,summarizes the research status of CO_(2) enhanced tight oil reservoir development and geological storage at home and abroad,summarizes the mechanism of CO_(2) injection for enhanced oil recovery and geological storage,and conducts numerical simulation of CO_(2) huff-n-puff,analyzes the factors affecting the huff and puff effect,providing a theoretical basis and foundation for further research on the integration of CO_(2) enhanced tight oil recovery and geological storage,alleviating environmental pressure,and achieving sustainable development.
作者
马含含
侯梦瑶
潘晓甜
张春晓
MA Hanhan;HOU Mengyao;PAN Xiaotian;ZHANG Chunxiao(School of Petroleum Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China)
出处
《石油化工应用》
CAS
2023年第9期8-12,共5页
Petrochemical Industry Application
关键词
致密油藏
提高采收率
数值模拟
tight oil reservoir
enhanced oil recovery
mumerical simulation
