微量物质示踪剂在高温高盐油田的适应性研究

Research on the adaptability of trace substance tracer in high-temperature and high-salinity oilfield

针对伊拉克H油田油藏地层水温度高、矿化度高,示踪剂使用种类受限的问题,开展了微量物质示踪剂适应性评价研究。利用高效液相色谱-质谱联用仪,通过室内实验,考察了一类微量物质示踪剂在该油田油藏条件下的背景浓度、配伍性、热稳定性、吸附性及其受破乳剂、pH和硫化氢的影响,系统评价了其在高温高盐油藏中的适应性。实验结果表明,微量物质示踪剂无背景浓度,配伍性良好,在油藏温度下不受破坏,不被地层岩石吸附,且不受破乳剂、pH和硫化氢的影响,在该高温高盐条件下具有较好的适应性。微量物质示踪剂技术能够作为高温高盐油田注水效果评价的有效监测手段,可为现场应用提供实验依据。

Aiming at the fact that the commonly used chemical substance tracer can’t be applied in the high-temperature and high-salinity formation water in H oil field,Iraq,a study on trace substance tracers was carried out.Using HPLC-MS,by means of laboratory experiments,the background concentration,compatibility,thermal stability and adsorption as well as the influence by demulsifier,pH and hydrogen sulfide of certain type of trace substance tracer under the reservoir conditions of this oilfield were investigated,so the adaptability of trace substance tracer in high-temperature and high-salinity reservoir was systematically evaluated.The experimental results showed that the trace substance tracer has no background concentration,with good compatibility,was not damaged under reservoir temperature,was not adsorbed by formation rock,and was not affected by demulsifier,pH and hydrogen sulfide,and has high adaptability under this circumstance.Trace substance tracer technology can be used as an effective monitoring method for the evaluation of water flooding effect in high-temperature and high-salinity oil fields.The research provided experimental basis for further field application.