文章摘要
CO2-水-岩石相互作用对岩石孔渗参数及孔隙结构的影响
The Effect of CO2-Water-Rock Interactions on Porosity,Permeability and Pore Structure Characters of Reservoir Rock
投稿时间: 2017-06-14  最后修改时间: 2017-07-25
DOI:
中文关键词: CO2  CO2-水-岩石  相互作用  孔隙度  渗透率  孔隙结构
英文关键词: CO2 flooding  CO2-water-rock interactions  porosity  permeability  pore structure
基金项目:中国石油科技创新(2015D-5006-0206)
作者单位E-mail
肖 娜 长江大学石油工程学院油气钻采工程湖北省重点实验室 4459521@qq.com 
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中文摘要:
      二氧化碳注入油藏后会与储层中的地层水和岩石发生反应。CO2-水-岩石之间的相互作用会导致储层的孔隙度、渗透率和孔隙结构等物性参数发生改变。论文考察了不同反应时间和不同反应压力下CO2-水-岩石相互反应后,岩石孔隙度、渗透率和孔隙结构分布的变化。结果表明,在不同的时间下反应后,岩石水测渗透率均降低;反应时间较长时,反应后岩石孔隙度增加;随反应时间的增加,渗透率恢复值逐渐增加。在不同的反应压力下反应后,岩石的水测渗透率均降低;反应压力较大时,反应后岩石孔隙度降低;反应后;随着反应压力的增加,岩石渗透率恢复值逐渐降低;当反应时间和反应压力改变时,岩石内小孔隙的分布发生了较大的改变,大孔隙分布变化不明显。
英文摘要:
      CO2 can react with formation water and reservoir rock when injected into the reservoir.The CO2-water-rock interactions can change the porosity,permeability and pore structure characters of the reservoir.In this paper,CO2,water and rock react in different times and under different pressures.Then, the change of porosity,permeability and pore structure of the rock were measured.Results show that,the water permeability of the rocks all decrease after the different reaction time,the porosity of the rocks increase after longer reaction time,and the permeability recovery of the rocks increase gradually with the increase of reaction time;the water permeability of the rocks all decrease under the different reaction pressure,the porosity of the rocks decrease under larger reaction pressure,and the permeability recovery of rocks decrease gradually with the increase of reaction pressure.With the variation of reaction time and pressure,the pore distribution of small pore changes a lot ,others change a little.
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