﻿ 高含水水平井注CO<sub>2</sub>酸岩反应数学模型

# 高含水水平井注CO2酸岩反应数学模型Mathematical Model of Acid Rock Reaction in the Process of CO2 Huff and Puff Stimulation of Horizontal Wells in High Water Cut

Abstract: Mathematical model of corrosion of CO2 on the wellbore radial in the process of CO2 huff and puff of horizontal wells in high water cut is established to study the effect CO2stimulation to the reservoir and the effect of injection rate, injection, soaking time, time of huff and puff, pressure of reservoir and temperature of reservoir to corrosion. Simulation results show that the effective distance of acid is short, which is less than 0.2 m; with the increase of injection rate, acid range increases, the degree of reservoir reconstruction decreases; as the injection, formation temperature and formation pressure increase, modification extent increase; soak time will have little impact on the reservoir reconstruction; with the increase of throughput times, the degree of reservoir re-construction become greater, but the degree of each stage and reformation decreases.

[1] da Motta, E.P., Plavnlk, B., Schechter, R.S., et al. (1993) Accounting for Silica Precipitation in the Design of Sandstone Acidizing. SPE-23802-PA, Society of Petroleum Engineers.

[2] 李松岩, 李兆敏, 李宾飞. 砂岩基质酸化中酸岩反应数学模型[J]. 中国矿业大学学报, 2012, 41(2): 236-241.

[3] 李松岩, 李兆敏, 林日亿, 等. 泡沫分流酸化数学模型的建立及应用[J]. 中国石油大学学报(自然科学版), 2008, 32(5): 77-82.

[4] 范泓澈, 黄志龙, 袁剑, 等. 高温高压条件下甲烷和二氧化碳溶解度试验[J]. 中国石油大学学报(自然科学版), 2011, 35(2): 6-11.

[5] 周琳淞. CO2驱水–气–岩反应对疏松砂岩储层物性影响的研究[D]: [硕士学位论文]. 成都: 西南石油大学, 2014.

[6] 张超, 李兆敏, 张东. 超临界CO2驱对储层物性影响的实验研究[J]. 西南石油大学学报(自然科学版), 2013, 35(5): 94-98.

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