低渗透油藏纳米微球强化CO2泡沫体系控制气窜实验

doi:10.7657/XJPG20210413

摘要/Abstract

摘要：

吉林油田黑46区块小井距注气试验区已进入开发中—后期,水窜气窜严重。为此,在CO₂泡沫中加入纳米微球颗粒,形成气液固三相组成的纳米微球强化CO₂泡沫体系,开展纳米微球强化CO₂泡沫体系控制气窜实验。实验结果表明：最优纳米微球强化CO₂泡沫体系组成是质量分数0.10%FA-1+0.50%FA-2+0.10%M-1;在不同温度和矿化度条件下,纳米微球强化CO₂泡沫体系较常规CO₂泡沫体系综合性能更好,其阻力因子增加20.03%;并联岩心渗透率级差为5.80时,剖面改善率较常规CO₂泡沫体系提高了14.29%;并联岩心渗透率级差为4.34时,最终采收率为79.97%,纳米微球强化CO₂泡沫驱较气驱提高采收率15.53%。

关键词: 吉林油田, 低渗透油藏, 高温油藏, 气窜, 纳米微球, CO₂泡沫体系

Abstract:

The development of the gas-injection pilot area with small well spacing in Block Hei-46 in Jilin oilfield has entered its middle to late stage characterized by serious water channeling and gas channeling. An enhanced CO₂ foam system with nanosphere particles which is composed of three phases, namely gas, liquid and solid has been tested on controlling gas channeling. The experiment results show that the optimal composition of the enhanced CO₂ foam system with nano-microsphere particles includes 0.10% FA-1, 0.50% FA-2 and 0.10% M-1 (mass fraction); at different temperature and salinity the performance of the enhanced CO₂ foam system is much better than a conventional CO₂ foam, and the resistance factor of the former is increased by 20.03%; when the permeability difference of parallel cores is 5.80, the profile improvement rate of the enhanced foam system is 14.29% higher than that of the conventional CO₂ foam; when the permeability difference of parallel cores is 4.34, the final recovery factor is 79.97%, and the enhanced CO₂ foam system can increase the recovery by 15.53% based on conventional gas flooding.

Key words: Jilin oilfield, low-permeability reservoir, high-temperature oil reservoir, gas channeling, nanosphere particle, CO₂ foam system

中图分类号:

TE357.435

赵云海, 王健, 黄伟豪, 张莉伟, 彭琦林, 杜红. 低渗透油藏纳米微球强化CO₂泡沫体系控制气窜实验[J]. 新疆石油地质, 2021, 42(4): 480-486.

ZHAO Yunhai, WANG Jian, HUANG Weihao, ZHANG Liwei, PENG Qilin, DU Hong. Experiments on Controlling Gas Channeling in Low-Permeability Reservoirs by Enhanced CO₂ Foam System With Nano-Microspheres[J]. Xinjiang Petroleum Geology, 2021, 42(4): 480-486.

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低渗透油藏纳米微球强化CO₂泡沫体系控制气窜实验

Experiments on Controlling Gas Channeling in Low-Permeability Reservoirs by Enhanced CO₂ Foam System With Nano-Microspheres

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