高温高压下泡沫稳定性和PV性能的研究

FOAM STABILITY AND PV PERFORMANCE UNDER HIGH-TEMPERATURE AND HIGH-PRESSURE CONDITIONS

对泡沫排水剂的评价主要是泡沫的静态性能和动态性能的常规评价。针对泡沫在排水采气施工过程中处于高温高压的实际情况,故对泡沫排水剂进行高温高压下的泡沫性能研究具有重大的实用意义。国内外对泡沫性能测试主要采用RossMile法和泡沫动态实验进行泡沫性能测试,由于仪器的限制,这些实验主要在常压下进行泡沫性能测试,而且在高温下(小于100℃)也仅是测其简单的起泡性能。为此,利用精密的高温高压地层流体分析仪,采用油田的地层水和起泡剂LH混合产生泡沫,进行了泡沫PV关系以及温度压力对泡沫稳定性的实验研究,更准确地得出泡沫排水剂的实用温度及其压力,这在一定程度上弥补了泡沫高温高压性能研究的空白,对泡沫排水剂的优选具有指导意义。

Routine analysis on foam static and dynamic performance is main analysis for discharging agents. Because foam is always under high-temperature and high-pressure conditions during the operations in oilfields, it is significant to study foam performances under similar conditions. At present, the primary test on foam performances is through RossMile method and foam dynamic experiment, which are restricted under normal pressure by the apparatus. Therefore, for high-temperature and high-pressure formation fluid, accurate applicable temperatures and correspondent pressures can be measured by experimental studies on foam PV and stability performance using precise analyzing apparatus and foam formed from formation water and discharging agent LH. This was a significant breakthrough in study on foam performances under high-temperature and high-pressure conditions, and gave a guide to the selection of foam discharging agents.