摘要
从研究底水突入油井的机理出发 ,讨论了底水上窜绕过夹层的过程。根据CoatsKH的底水流模型 ,计算了底水绕过夹层时的累计水侵量 ,详细讨论了夹层所在位置、大小和厚度对底水锥进的影响。研究表明 ,处于油水界面之上的夹层对底水锥进能有效抑制 ,提高了开采效果 ;夹层半径越大 ,对水侵量的减小越大 ,其有效作用时间越长 ;夹层的作用还同油层的非均质性和开采速度密切相关 ;有夹层的油藏 。
A study is made on the mechanism of bottom water coning in well and the shape of bottom water coning through barrier. Based on Coats' bottom water flow model, bottom water influx during its coning through the barrier is calculated, and the roles of location, barrier size and height in bottom water coning are studied. The results indicate that the barrier on the oil/water contact has a considerable effect on the elimination of bottom water coning, and can increase exploitation effect; the bigger the barrier is, the more the bottom water influx decreases, and the longer its valid time is. Furthermore, strata heterogeneity and exploration speed also play roles on the barrier working on bottom water coning. Extraction speed and penetration degree of the reservoir with barrier may thus increase to some extent. The role of barrier in bottom water reservoir is illustrated by examples.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2002年第5期459-462,共4页
Acta Geoscientica Sinica
关键词
开发
底水油藏
夹层
底水锥进
水侵量
极限产量
bottom water reservoir barrier bottom water coning water influx critical production
