高分辨率层序地层学在河流相油田开发中的应用

河流相是我国陆相盆地重要的油气储集层系类型之一，开发阶段应用高分辨率层序地层学进行河流相高精度小层划分，对于指导河道砂体的精细划分对比有重要意义。由于受到河流相地层自旋回沉积、沉积间歇面的作用、河型和砂体叠置样式的变化以及基准面旋回的级次的划分等复杂因素的影响，在开发阶段进行高精度层序对比时，难度更大。运用高分辨率层序地层学原理和方法，综合分析河流相模式的特点，充分利用河流相岩相、相序的组合特征随空容纳空间规律性变化，结合各种关键面的约束控制、油水界面在小层内部空间的分布位置以及河道的切割充填作用，进行精细河流相小层划分对比。旨在摸索一套油田开发中后期河流相高精度层序划分的思路和方法，以指导油田的生产开发。并以渤海Q油田明化镇组为例，在实际应用中取得了较好的效果。

Application of High-resolution Sequence Stratigraphy of Fluvial Facies in Development of Oilfield

Fluvial sandbody is one of the most important hydrocarbon reservoirs in China. Using of high-resolution sequence stratigraphy in fluvial facies in development of oilfield is very important to the Guidance of fluvail sandbod Subdivision and Correlation. There are complex factors, including fluvial facies autocyclicity sediment, the effect of sedimentary surface, channel pattern and sandbody architecture, and the orders of base-level cycles, which resulted in the difficulty to define subdivision and correlation. According to the theory and approach of high-resolution sequence stratigraphy, combining with fluvial facies model, lithofacies and facies sequence and association, and key surface correlation, reservoir fluid correlation and channel erosion and fill, fluvial reservoir subdivision and comparison have been carried out. Provided a clue and methods on the fluvial facies subdivision and correlation in development of oilfield of intermediary and later stage, in order to be helpful to product and develop of oilfield. In Minghuazhen Formation Bohai Q Oilfield, It has achieved good results in the practical application.