齐40块蒸汽驱技术指标探讨

Discussion on technical indicators of steam stimulation of Qi 40 block

为探索稠油后续接替开发方式,1998年在齐40块莲花油层开展4个井组的蒸汽驱先导试验,十年来先导试验经历了热连通、蒸汽驱替、蒸汽突破三个阶段,汽驱采收率26.2%,最终采收率62.8%,取得了较好的开发效果。根据先导试验不同阶段的注入与产出的关系及地下"三场"的变化特点,对蒸汽驱试验效果进行了评价,并对温度、压力、汽腔等技术指标进行分析总结,为齐40块蒸汽驱工业化实施的动态调整提供参考依据。

In order to explore follow-up heavy oil development methods,steam stimulation pilot testing of oil-layers in Qi 40 block was carried out in 1998. During the past 10 years,the pilot testing has undergone three stages: hot inter-well communication,steam stimulation and steam breakthrough. The recovery from steam stimulation is 26. 2% and the ulti-mate recovery is 62.8%,achieving better development effect. According to production-injection ratio and the vari-ance characteristics of temperature,pressure and residue oil saturation,the steam stimulation evaluation has been carried out. Besides that,the technical indicators such as tempera-ture,pressure and steam chamber has been analyzed,which provides reference for dynamic adjustment of steam stimula-tion in Qi 40 block.