低渗透砂砾岩油藏油水运动规律研究

STUDIES ON THE OIL-AND-WATER MOVEMENT LAWS OF LOW-PERMEABILITY GLUTENITE RESERVOIRS

胜利盐家油田的盐22块属于深层低渗透砂砾岩油藏。油田在注水开发过程中，油水运动规律将变得越来越复杂。而油藏的油水运动制约着油田的开发效果。因此，必须准确掌握油藏的油水运动规律，才能有效地控制地下油水的运动。为此，将生产层位的油水相对渗透率曲线转化为含水饱和度与油水相对渗透率比值之间的关系曲线。然后结合产水率的含义分析了油井的产水规律。在此基础上，结合该生产层位的毛管压力曲线研究了油水在垂向和径向上的分布及其在径向上的运动规律。为油田开发后期调整挖潜决策提供了一定的依据。

Yan No. 22 Block of Yanjia Oilfield （ Shengli Oilfield） belongs to deep low-permeability glutenite oil reservoirs. In the course of the oilfield development by water flooding, the movement laws of both oil and water are becoming more and more complex. On the contrary, the movement restricts the development effects. Therefore, the laws must be mastered soundly to effectively control the underground movement of both oil and water. Considering the above, the oil and water relative permeability curves in the production horizons are changed into the relation curves between water saturation and the ratio of the above two permeabilities. Then integrating the implication of watercut, the laws of water production is analyzed. On the basis of the above, the vertical and horizontal distributions of both oil and water and the vertical movement laws are studied with the help of capillary pressure study of the production horizon. All the achievements studied above have provided a certain evidence for the adjusting and tapping decisions at the late period of oilfield development.