依据高分辨率层序地层学进行剩余油分布预测

地层基准面旋回变化形成的沉积物体积分配和相分异 ,不仅决定了沉积地层格架 ,而且也决定了沉积体的非均质性特征 ,进而影响了开发方案的设计和开发效果 ,最终决定了油田开发后期的剩余油分布。通过对双河油田核桃园组Ⅳ油组 1 4小层形成过程中基准面旋回的变化与沉积响应分析 ,认为若把砂体纳入基准面旋回的过程———响应体系中去考虑 ,研究砂体在基准面旋回的位置、砂体形成的基准面旋回类型 ,可直接指导砂体非均质预测和剩余油分布确定。图 3参 7

Remaining oil distribution prediction based on high-resolution sequence stratigraphy.

The sedimentary architectural framework is controlled by the sedimentary volumetric partitioning and facies differentiation during the courses of base level cycles, which are also key factors for the reservoir heterogeneities that affect making development projects and their efficiency. As a result, the remaining oil distribution is also affected by these matters. In the inter medium and long term base level rise cycles, with the base level's rising, the properties of the sand bodies become better and the upper zones are always developed as key layers, and there are little remaining oil which area is smaller. In the medium and long term base level fall cycles, the conditions are opposite. Short term base level cycles affect heterogeneities in the sand bodies. The rising of short base level will make the properties of the sand body upper better, while the falling make an opposite effect. And these will be sure to make different developing responses. When sand bodies are put into the course and sediment response system, it should be easy to make decision where should be rich in remaining oil.