CO2在原油及高矿化度地层水体系中的溶解试验
Solubility of CO2 in Crude Oil and High Salinity Formation Water System
摘要:
在开展深层高矿化度下强边底水油藏CO2驱油评价时,CO2原油溶解分配是一个关键参数。利用自行研制的高温、高压CO2溶解度测定装置,在115℃、49.5 Pa条件下测试CO2在高矿化度地层水、原油以及非饱和油水共存状态下的溶解度。试验结果表明:地层水溶解CO2气体量为28.6 m3/m3,复配原油溶CO2能力为150 m3/m3,在油水体积比1:1条件下,注入的CO2在油水中的分配系数为10.1。
Abstract:
The dissolution and distribution of CO2-crude oil was a key parameter in the evaluation of CO2 flooding in a strong and bottom water reservoir with deep and high salinity. The solubility of CO2 in the presence of high salinity formation water, crude oil and unsaturated oil-water system was tested at 115˚C and 49.5 MPa by using a self-developed high temperature and high pressure CO2 solubility measurement device. The experimental results show that the formation water dissolved CO2 gas amount is 28.6 m3/m3, and the ability of CO2 to dissolve the compound crude oil is about 150 m3/m3. Under the condition of the oil/water volume ratio of 1:1, the partition coefficient of the injected CO2 in the oil and water is about 10.1.
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