塔里木盆地东河油田机械防砂物理实验研究

对于各种防砂工艺下的产能,国内外都进行了不同程度的研究,但由于物理模拟实验比较复杂,目前的研究大多局限于理论和数学模型.首先利用三维物理模拟实验装置对塔里木盆地东河油田拟采用的筛管砾石充填、正对产层直接下筛管、压裂充填3种防砂工艺进行了模拟，并比较了这3种不同防砂工艺下的产能,然后将物理模拟实验测量的产能值与所建立的理论模型计算结果进行了对比,结果表明:三维物理模拟实验能较真实地模拟3种不同的防砂工艺和定量地反映其间的产能差异;在相同的实验条件下,产能大小依次为压裂充填防砂工艺、砾石充填防砂工艺、面对产层直接下筛管防砂工艺;三维物理模拟实验模型把防砂和产能有机结合,可用此模型对不同防砂工艺下的防砂效果及油井产能做出正确的评价。

Reseach and Application of Dynamic Sanding Prediction in Donghe Oilfield

Donghe Oilfield of the Tarim Basin is an ultra deep sandstone reservoir. The compaction of formation rock is good. According to prediction study and pilot tests, it would not produce sand. However, after it was put into production, sand production gradually occured, and became more and more serious year by year, owing to the significant reservoir pressure drawdown and water-cut increase. How to dynamically predict the sand production according to the changing reservoir conditions during the reservoir devel opment is a key issue both in theory and in practice. This paper proposes two modification factors and which reflect the influence of pressure drawdown and water cut increase respectively. Using the revised formula, the calculation results and prediction conclusions match the reservoir situations very well. The proposed new idea and method provide a valuable reference to sand control Of other sandstone reservoirs.