大庆水驱砂岩油田含水上升的基本规律

应用单层水驱油资料和多层油田注水开发资料，结合不同原油性质油田含水率与可采储量采出程度关系曲线，分析了砂岩油田注水开发过程中含水上升的基本规律。指明了高粘油田含水率８０％以后是油田开发的一个重要阶段。对油田含水上升规律的三种基本公式进行了比较，其中双对数型水驱特征曲线在低含水阶段就出现了直线，并一直延续到高含水期，是描述油田含水上升规律的一种较好公式。

BASIC PRINCIPLES OF WATER CUT RAISE IN WATERDRIVE SANDSTONE RESERVOIR, DAQING OILFIELD.

On the basis of monolayer water displacement data and mutilayers water injection development data, analysis of basic principles of water cut raise during water injection development in sandstone oilfield was made by combining with the relation curve of water cut vs. recovery percent of recoverable reserves in different oil viscosity oilfields, pointing out that high viscosity oilfield with more than 80% of water cut is an important stage for oilfield development. Moreover, three basic formulae for regularity of water cut raise were compared, among which dual logarithm water displacement type curve assumed straight line segment from low water cut till high water cut stages, and can be as a better formula for describing regularity of water cut raise in oilfield.