姬塬油田黄3区长8超低渗油层CO2驱埋实验

doi:10.7657/XJPG20230511

摘要/Abstract

摘要：

为明确姬塬油田超低渗油藏CO₂驱替及碳埋存机制，通过开展长岩心实验，对比分析气水不同组合驱替方式对提高采收率和CO₂埋存效果的影响。实验结果表明：水驱后CO₂与水交替驱采收率最高，其次为CO₂与水交替驱，而连续CO₂驱采收率最低，CO₂突破是影响采收率的关键因素，交替注入可以抑制气窜；油藏中CO₂埋存位置以大孔隙为主，气水交替驱比纯气驱更有利于小孔隙中CO₂埋存，埋存率从高到低依次为连续CO₂驱、CO₂与水交替驱、水驱后CO₂与水交替驱及水驱后CO₂驱。

关键词: 姬塬油田, 超低渗油藏, CO₂驱, 气水交替驱, 采收率, CO₂埋存, 岩心实验, 核磁共振

Abstract:

In order to determine CO₂ flooding and storage mechanisms in the ultra-low permeability reservoir in Jiyuan oilfield, long core experiments were performed to understand the performance of enhanced oil recovery (EOR) and CO₂ storage under different flooding techniques. The results show that the CO₂-water alternating injection after water flooding yields the highest recovery factor, followed by CO₂-water alternating flooding, while continuous CO₂ injection exhibits the lowest recovery factor. CO₂ breakthrough is a crucial factor influencing recovery factor, and alternating injection can suppress gas channeling. CO₂ is dominantly stored in the large pores of the reservoir, and the CO₂-water alternating flooding is more conducive to CO₂ storage in the small pores than pure CO₂ flooding. Continuous CO₂ injection, CO₂-water alternating flooding, CO₂-water alternating injection after water flooding, and CO₂ injection after water flooding exhibit a descending order in CO₂ storage efficiency.

Key words: Jiyuan oilfield, ultra-low permeability reservoir, CO₂ flooding, CO₂-water alternating flooding, recovery factor, CO₂ storage, core experiment, NMR

中图分类号:

TE348

陈小东, 王进, 宋鹏, 刘建, 杨卫国, 张宝娟. 姬塬油田黄3区长8超低渗油层CO₂驱埋实验[J]. 新疆石油地质, 2023, 44(5): 592-597.

CHEN Xiaodong, WANG Jin, SONG Peng, LIU Jian, YANG Weiguo, ZHANG Baojuan. Experimental Study on CO₂ Flooding and Storage in Chang 8 Ultra-Low Permeability Reservoir in District Huang 3，Jiyuan Oilfield[J]. Xinjiang Petroleum Geology, 2023, 44(5): 592-597.

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姬塬油田黄3区长8超低渗油层CO₂驱埋实验

Experimental Study on CO₂ Flooding and Storage in Chang 8 Ultra-Low Permeability Reservoir in District Huang 3，Jiyuan Oilfield

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