鲁克沁油田原油流变性研究

STUDY ON RHEOLOGICAL PROPERTY OF THE LUKEQIN CRUDE

重质高粘原油一般表现为非线性渗流特点,其流变性物理实验研究对于指导油藏的开发具有重要意义。对鲁克沁油田重质高粘原油流变性实验研究结果表明,该区脱气原油粘滞性较强,温度由低逐渐升高时,流体性质由塑性体向假塑性体和牛顿流体型过渡,当温度接近油层温度(67℃)以上时,非线性渗流性不显著,基本为牛顿流体;油层温度高于粘温曲线拐点(58℃),具有一定的流动能力,只要控制合适的注水速度,就可充分的利用地层热能,进行常温注水开发油藏。

The physical experimental study of heavy crude rheological property, which usually exhibits non - linear percolation characteristics, is very important in directing reservoir development. The experiment result of the Lukeqin heavy crude showed that the degassed crude, with high viscidity, turned from plastic fluid to pseudoplastic and Newtonian fluid gradually as the temperature raised, and when temperature was over reservoir temperature (67℃), the crude did not show prominent percolation, but was premarily Newtonian fluid. Since the reservoir temperature is higher than the inflection point (58℃) of the visicosity-temperature curve, the in-situ crude has some certain mobility, as long as the water injection speed can be controlled properly, the reservoir can be developed through normal waterflooding by use of the geotherm.