弱凝胶调驱体系的选择与性能评价

Selecting and estimating performance about weak gel profile control system

草舍油田是一个高温高矿化度的油田,经过CO2驱后需要调剖。根据目前高温高矿化度油藏已经取得的深度调剖经验,选用耐温抗盐有机交联弱凝胶调驱体系。根据草舍油田地质情况,并模拟回注污水,对选定的调驱体系进行室内实验。结果表明,弱凝胶在岩心内部候凝成胶后,对高渗岩芯产生了明显的封堵效果,起到了调剖的作用,能够满足草舍油田要求。

Caoshe oilfield is high temperature and high salinity, and profile control is required after CO2drive. According to acquiring experience of deep profile control, it is selected that weak gel profile control system of temperature resistance, salt resistance and organic crosslinking. Based on reservoir geology characteristic and simulating recycling waste water, laboratory experiments are made about selecting profile control system. It is indicated that selecting weak gel can suit to Caoshe oilfield because it plugs the high permeability core obviously after forming gel, and it presents action of profile control.