八面河周缘水油藏高含水井热采机理及工艺优化

On the Thermal Recovery Mechanism and Technique Optimization of High Water Cut Wells of Periphery Water Reservoirs

八面河油田面120区沙三中1砂组产出水性质为近井地带周缘水,对热采增产机理进行分析后的结果表明,温度升高带来的热力降粘和相渗变化是该类型高含水井热采取得较好效果的主要原因,同时注汽量优化和高温起泡剂辅助吞吐可以进一步改善热采效果。此类油藏热采工艺的成功运用,对类似出水稠油油藏的开发具有一定的借鉴意义。

The water produced from Shasanzhong NO.1 sand group of Mian 120 district in Bamianhe Oil Field is around the periphery of immediate vicinity of wellbore.According to the analysis of thermal recovery's impact on output increase,the viscosity reduction and relative permeability changes brought about by heat are the primary reasons that the type of high water cut well mentioned above can pull off better thermal recovery while the recovery effects can be further improved by steam injection optimization and the use of high temperature foaming agent as an aid of throughput.The successful application of thermal recovery in this type of reservoir can lend some lessons to the exploration of heavy oil reservoirs with similar produced fluid.