渤海稠油不同吞吐方式效果对比及优选

Comparison and Selection of Different Steam Stimulation Modes for Bohai Heavy Oil

针对海上稠油热采方式优选问题,参考渤海A油田南区实际油藏数据建立典型模型,利用数值模拟技术,对比不同油藏的渗透率、Kv/Kh值、韵律性、有效厚度、原油黏度和控制储量等油藏、流体参数条件下,蒸汽吞吐及多元热流体吞吐的开发效果。结果表明,原油黏度小于1 000 mPa·s时,对于有效厚度大于10 m,Kv/Kh小于0.1,渗透率较高的正韵律储层更有利于多元热流体吞吐。首次总结出不同热采方式适宜的油藏流体参数技术界限,达到了快速筛选目标油藏吞吐方式的目的,为渤海稠油油田的开发提供借鉴,也为热采吞吐技术的推广应用提供指导。

In order to select offshore heavy oil thermal recovery mode,the typical model of south part of Bohai A Oilfield was established with real reservoir data,on this model,numerical simulation was adopted to compare developing effects of steam stimulation and complex thermal fluid stimulation under different reservoir permeability,Kv /Kh value,rhythm,effective thickness,crude viscosity,and controlled reserves. The results show that when crude viscosity is less than 1 000 mPa·s,complex thermal fluid stimulation is more suitable for reservoirs with positive rhythm,effective thickness of more than 10 m,Kv /Kh of less than 0. 1,and higher permeability. This is the first time the technical limits of reservoir fluid parameters suitable for different thermal recovery methods are summed up,which is helpful for quick selection of steam stimulation methods for targeted reservoirs. This can not only provide a reference for the development of Bohai heavy oilfield,but also guidance for the promotion of thermal and steam stimulation.