朝阳沟油田注采系统调整效果

Adjustment effects of injection production system in Chaoyanggou oil field.

搞好油藏的注采系统调整，是高效开发低特低渗透油田的重要措施。朝阳沟油田是大庆长垣外围油田中开发规模最大的低特低渗透油田，根据油藏数值模拟、数理统计的预测，结合现场试验资料和生产成果，对朝阳沟油田不同类型储集层注水方式的调整方法、效果、时机和水驱控制程度界限值等问题进行研究。研究结果表明，天然裂缝较发育的储集层适于进行线性注水调整，储集层裂缝不发育及砂体零散分布、断层较多的区块适于进行不规则点状注水调整。进行注采系统调整，能够有效提高低特低渗透储集层的水驱控制程度，通过调整压力场变化，改变注水驱油的液流方向，提高了注入水波及体积和驱油效率。朝阳沟油田注采系统调整所取得的成果对其它低特低渗透油田的合理开发有参考价值。图６参２（陈志宏摘）

Successful adjustment of injection and production system is an important approach to exploit the low super low permeability reservoir efficiently. Based on the prediction from numerical reservoir simulation and mathematical statistics, together with field test data and production results, the adjustment process, effects, start up time and control extent of water flooding etc. of the different injection modes in various reservoirs in Chaoyanggou oil field are studied. The results show that linear water injection adjustment is preferred in those reservoirs with developed natural fractures. In others with less developed natural fractures, sporadic sands and developed faults, sporadic water injection is more suitable. Adjustment of injection production system can improve the control extent of water flooding in low super low permeability reservoirs. By adjusting the change of pressure field, hence changing the flow direction of the fluid in water drive reservoir, swept volume and oil displacement efficiency of water injection are increased. The study results are useful for the successful development of other low super low permeability reservoirs.