关键词: 高含水, 剩余油, 不稳定试井, 试井解释, 双河油田

Abstract: The research on residual oil distribution of high water-cut stage is an important aspect of development strategy for a mature oilfield.According to the fluid flow properties of high water-cut stage reservoir, using the radial flowing parameters derived from welltest interpreation and integrating some principles of reservoir engineering,a new method of researching residual oil distrbution is presented in the article.An elaborate welltest project had been designed and carried into execution at 437 block of Shuanghe Oilfield for the study;the transient welltest data of producing well and water injection well had been interpreted.The result shows that the residual oil allocates at a certain area between producing wells and injection wells.The new cognition about the law of residual oil distribution of maturely developed reservoir has been obtained by the research,and it is very important to the adjustment and rooting potential work,and tertiary recovery for high water-cut reservoir.

Key words: high water-cut, residual oil distribution, transient welltest, welltest interpretation, mature oilfield, Shuanghe Oilfield