油田热采数值模拟参数计算与选择

COMPUTING AND SELECTING PARAMETERS OF NUMERICAL MODELLING OF OIL FIELD THERMAL RECOVERY

热采数位模拟需要输入很多参数，而且要用昂贵的实验来测定，同时用热采模型来历史拟合油田生产动态，需要长时间的模拟工作。通常在热采前，油田已有一定的开采历史，故用黑油模型（非热采模型）来拟合．就要容易得多，而且不必做昂贵的实验，即可进行热采数值模拟研究．又可从历史拟合过程中认识油藏动态。通过讨论了如何选择热参数，计算不同温度的原油粘度，气液平衡常数K值及论述如何把黑油模型历史拟合结果转换成热采模型所需的输入数据的基础上认为：气液平衡常数、原油组分和粘度等是关键参数；将CMG的黑油模型IMEX和热采模型STARS用来作为算例，而提供了一种既便宜又实用的油田热采模拟方法。

Lots of parameters need to be inputed to numerical modelling of thermal recovery, and they need to be tested by expensive experiments. It needs long term of modellingto match the history of production performance of the oil field with thermal simulator. An oilfield usually has a certain production history before thermal recovery, so that it will be easierto match with black-oil simulator(non-thermal simulator). By doing so,no expensive experiment is needed,and numerical modelling of thermal recovery can be carried out,as well asone can understand reservoir performance from the process of history match.After discussing how to select thermal parameters, computing crude oil viscosities ofdifferent temperatures and gas liquid equilibrium constant K and discussing how to convertthe history rnatching result of black-oil simulator into the input data needed by thermal simulator，this paper offers that gas liquid equilibrium constant，crude oil composition and viscosity are key parameters :to take LMG's IMEX black－oil simulator and STARS thermal simulator as calculation example, provides a ready and practical thermal recovery modelling methodof oil field．