郭天娇,佟斯琴,孙文静,刘勇,宫泽斌
GUO Tianjiao,TONG Siqin,SUN Wenjing,LIU Yong,GONG Zebin

• 1:多资源协同陆相页岩油绿色开采全国重点实验室
• 2:中国石油大庆油田有限责任公司勘探开发研究院
• 3:黑龙江省油层物理与渗流力学重点实验室

摘要(Abstract)：

在“双碳”背景下，CO_2捕集、利用与封存（CCUS-EOR）是石油企业在碳减排方面的主要技术手段。古龙页岩油资源丰厚，为注CO_2提高采收率及CO_2埋存提供了巨大的空间。针对目前页岩油一次开发采出程度低、吞吐开发动用范围有限、水平井间注气驱替易气窜等问题，结合古龙页岩储层特性，从地质特征、压裂改造及经济成本3个方面进行分析，最终明确了直井造平面缝、井间注CO_2线性驱替的方案设计思路。为验证该方案的可行性，结合古龙页岩油注CO_2驱替室内实验结果，建立1注2采的数值模拟模型，利用数值模拟方法对直井注CO_2驱替古龙页岩油的参数进行设计优化。结果表明：直井注CO_2驱替的最优注采井距为80、120 m；最优注入速度为90 t/d，该方案可实现对古龙页岩基质原油的有效动用。研究成果可为古龙页岩油注CO_2开发及CO_2埋存提供参考依据。
In “dual carbon” context, Carbon Capture, Utilization and Storage-Enhanced Oil Recovery(CCUS-EOR)is a major technology for carbon emission reduction of petroleum enterprises. Rich resources of Gulong shale oil provides a huge space for CO_2-EOR and CO_2 storage. Faced by challenge of low primary recovery of OOIP of shale oil, limited producing range of CO_2 huff and puff and liable to inter-horizontal wells gas channeling with CO_2 injection displacement, geological characteristics, fracturing stimulation and economic cost are analyzed combining with characteristics of Gulong shale reservoirs, and scheme design is determined with idea of vertical wells initiating plane fractures and interwells linear CO_2 injection displacement. In order to verify the feasibility of the scheme, numerical simulation model of 1 injector and 2 producers is established combining with laboratory experiment results of CO_2 injection displacement for Gulong shale oil. Parameters of CO_2 injection displacement in vertical wells for Gulong shale oil is designed and optimized by numerical simulation method. The results show optimal injector-producer spacing of 80,120 m and optimal injection rate of 90 t/d for CO_2 injection displacement in vertical wells. This scheme can realize effective producing of matrix oil of Gulong shale. The research provides reference basis for CO_2 injection development of Gulong shale oil and CO_2 storage.

关键词(KeyWords)： 古龙页岩油;CCUS-EOR;CO_2驱替;方案设计;参数优化
Gulong shale oil;CCUS-EOR;CO_2 displacement;scheme design;parameters optimization

Abstract:

Keywords:

基金项目(Foundation): 中国石油天然气股份有限公司重大科技专项“陆相页岩油规模增储上产与勘探开发技术研究”（2023ZZ15）

作者(Author): 郭天娇,佟斯琴,孙文静,刘勇,宫泽斌
GUO Tianjiao,TONG Siqin,SUN Wenjing,LIU Yong,GONG Zebin

DOI: 10.19597/J.ISSN.1000-3754.202312019

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