SZ36-1 油田水源水混注对储层损害的实验研究

根据正交实验的结果、结垢趋势及结垢类型分析,对八种阻垢剂进行了筛选及最佳用量评价。用激光粒度仪对用最佳与最差配比配制的的混合水样在常温(20 ℃) 和地层温度(60 ℃) 下分别进行了测定,结果两种配比的混合水样的固相浓度、固相粒径等均发生了变化。对两种配比的混合水样在常温和地层温度下及在投加阻垢剂与未投加阻垢剂条件下对储层岩芯的损害进行对比评价。结果表明:最佳配比的混合水样对岩心的损害较最差配比混合水样小;同一种配比的混合水样在常温下对岩心的损害较地层温度下小;投加阻垢剂后两种配比的混合水样对岩心的损害均比未投加阻垢剂的小。

EXPERIMENTAL STUDY OF FORMATION DAMAGE CAUSED BY THREE KINDS OF SOURCE WATER MIXED INJECTION IN SZ36-1

Eight kinds of scale inhibitors have been screened out and the optimal dosage has been decided on the base of perpendicular experimental results. The mixed samples with the optimal and the worst mixture ratio have been measured by the laser particle device under the formation temperature (60 ℃) and the normal temperature (20 ℃) . Results show that solid concentration and particles diameters have changed. The damage of the cores caused by the two kinds of mixed samples has been evaluated contrastively under normal and formation temperature when inhibitors existing or without inhibitor. The damaged degree of cores caused by the optimal mixture ratio of the mixed sample is slighter than by the worst mixture ratio. As to the mixed samples with the same mixture ratio , the damage to cores under theformation temperature is less serious than the normal temperature when adding inhibitor ; the damage to cores brought by the two kinds of mixed samples after adding inhibitors is less than ones without inhibitors.