曲流河点坝精细刻画研究

FINE DESCRIPTION AND STUDY ON POINT BAR OF MEANDERING RIVER

大庆油田曲流河沉积厚油层聚驱后开发面临着含水高、剩余油高度分散等困难，需要精细刻画点坝内部构型，重构地下认识体系。以北一区断东“二三结合”试验区葡I2沉积单元为例，按照沉积微相、单砂体、点坝内部构型3个层次循序渐进地进行了储层层次分析，提出研究过程应遵循的“三个结合”：当前模型与原型模型相结合；单井、剖面、平面、立体信息相结合；静态成果与动态资料相结合。实践证明，总结出的曲流河点坝精细刻画方法及流程有效实用。

Facing the difficulties of high watercut, highly scattered residual oil and so on in the development of thick meandering depositional oil layers after polymer flooding in Daqing Oilfield, the internal structures of the point bars are needed to be finely described so as to establish underground understanding system. Taking P I 2 sedimentary unit in ＂second and tertiary combined development＂ experimental pilot in East Fault of North No. 1 Block as example, according to the gradually hierarchy analyses of the reservoirs on sedimentary microfacies, single sand body and internal structure of point bar, ＂Three Combinations＂ are pointed out in the course of the study： combination of the previous model and the original model; combination of single well, cross section, horizontal and 3D information; combination of static results and dynamic data. The practice shows that the summarized meandering point-bar fine description method and its work flow are effective and practical.