泡沫调剖改善多元热流体开采效果技术研究与应用

Research and application of improving multiple thermal fluid recovery effect by profile control with foam

许建军

XU Jianjun

中海石油中国有限公司天津分公司，天津　300452

Tianjin Branch of CNOOC China Ltd., Tianjin 300452, China

在海上高孔高渗油藏中实施热采，汽窜是必须面临和解决的问题，结合海上高速高效开发的要求，开展了高温调剂泡沫体系的研究。通过对高温起泡剂的静态性能和动态性能进行实验评价，优化最佳的起泡剂浓度，结合数值模拟方法进行参数优化。研究结果表明：优选后的高温起泡剂在190 ℃温度下起泡体积≥ 180 mL，半衰期≥ 420 s，阻力因子≥ 20；300 ℃ 恒温12 h 后发泡体积、半衰期、阻力因子等指标均保持在原来的90% 以上；优选后的起泡剂浓度为0.3%，可提高驱替效率14.49%；段塞注入方式可提高驱油效率18.25%。在现场使用该项工艺后，现场注入压力升高1.5 MPa 左右，生产未受注热井影响。

During thermal recovery from marine oil reservoirs with high porosity and high permeability, steam channeling is a problem which must be confronted and addressed. In view of the reservoir development with high speed and high efficiency, it is objectively required that the technology should be stable and reliable. Through experiment and evaluation on static performance and dynamic performance of high temperature foaming agent, the concentration of forming agent was optimized, and the parameters were optimized by way of numerical simulation method. The research on optimized high-temperature foaming agent shows that the foaming volume at 190℃ was ≥180 mL, half-life period was ≥420 s, and resistance factor was ≥20. After 12 hours under constant 300 ℃, its forming volume, half-life period and resistance factor were all over 90% of its original values. The optimized forming agent concentration was 0.3%, which can improve the displacement efficiency by 14.49%. The slug injection method can improve the oil displacement efficiency by 18.25%. After this technology was used on site, the injection pressure increased by about 1.5 MPa, and the oil production was not affected by thermal injector.

10.13639/j.odpt.2015.02.030