摘要
边底水作用是影响注蒸汽热采效果的一个重要因素。本文通过对单家寺油田单2断块地质特点的分析,及对试验区吞吐试验动态的研究,揭示了该油田活跃的边底水对稠油油藏蒸汽吞吐开采效果起着决定作用,得出蒸汽吞吐具有水驱特征,产量变化表现为水驱衰减递减规律的结论。在上述研究的基础上,对单2断块试验区蒸汽吞吐加边底水驱效果进行了预测,其采收率可达20%～26%。需要指出的是:由于活跃边底水的作用,将给蒸汽吞吐转蒸汽驱带来困难。
The effect of edge-bottom drive is one of the factors affacting the resul- ts of thermal drive by steam injection.Based on the geological characteris- tic of the Shah 2 fault block in Shanjiasi oil field and a study of the reser- voir behavior under steam huff and puff process,this paper demonstrates the critical effects of active edge-bottom water on the heavy oil reservoir behavior exhibets the feature of water while the production declines according to the regularity of declining characterized by water drive.Based on the results,it is predicted that the recovery factor of this pilot area operated by steam huff and puff prosess with the action of edge-bottom water drive will be 20%～26%.It should point out that with active edge-bottom water drive,difficulties will occur when steam huff and puff process is transferred to steam drive.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1991年第5期66-71,共6页
Petroleum Exploration and Development
