提高蒸汽吞吐阶段采出程度的数值模拟研究

Numerical modelling for improving recovery percent of reserves during huff and puff

针对辽河油区不同稠油油藏类型，选取典型蒸汽吞吐井进行数值模拟研究。分析了影响蒸汽吞吐开发效果的主要因素是渗透率、地层系数、油层在射孔井段位置。并以此为基础提出了提高该阶段采出程度的三种措施是选注合采、交互式注汽合采及加深注汽管柱注汽。从而不同程度地提高了开发效果。

According to different types of heavy oil reservoirs in Liaohe oil province, numerical modelling was carried out by choosing typical huff and puff wells. Through analysis, this paper points out that permeability, formation capacity, position of oil bearing layer with perforation interval are the main factors affecting development result of huff and puff. Thus, this paper presents that the three measures for improving recovery percent of reserves in this stage are injecting into chosen layers while producing from all layers, injecting and producing alternatively, and injecting with deepened steam injection string. Thereby, the development result has more or less improved.