摘要
具有活跃边底水的稠油油藏——单2断块沙三段4砂体,经6年蒸汽吞吐开采后,边底水侵入日益加剧,其转蒸汽驱可行性和时机就成为极其重要的问题。本文在对地质特征再认识的基础上,通过对先导试验区剩余油饱和度状况、油层热连通状况、油层压力水平及变化趋势、蒸汽驱提高采收率等技术界限的深入分析,提出了试验区蒸汽吞吐转驱的合理时机。据此确定了注采井网和注采参数。1992年4月蒸汽驱试验实施后,获得了较好的汽驱效果,到1992年底已累计增油4765t。这在胜利油田尚属首次,对相同类型油藏进行蒸汽驱开采具有参考意义。
After six years of development by steam huff-puff process, the invasion of edge-bottom water into the heavy oil reservoir with active edge-bottom water drive-sandbody No. 4 in Sha_3 in Shan-2 fault block, is more intense, the feasibility of and the time for a conversion of steam huff-puff to steam drive is a key technical problem. Based upon a re-recognition of its geological characteristics, by an analysis of the technical data from the pilot area, such as the remaining oil saturation, thermal communication of the reservoir formation, level of the current reservoir pressure and its trend of variation, increase in the recovery efficiency under a system drive process, etc., the proper time for such a conversion is suggested. Well patterns for steam drive and relative technical parameters are determined in turn. The steam drive pilot has been started since April 1992 and relative satisfactory results are obtained. 4756t incremental oil has been obtained at the end of 1992. This is the first time in Shengli oil region and such a result will be taken as a reference to the steam drive process in the same reservoirtype.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1993年第6期61-68,共8页
Petroleum Exploration and Development
