【摘要】 依据水驱油藏流体变化的基本规律及中国东部两大油田大量的水驱实验和测井数据统计结果,详细讨论了正、反韵律储层水驱过程中油水运动特征,总结了长期注水开采油田储层孔隙率、压力、流体性质等物性参数的变化以及这些变化对声学参数的影响,阐明了不同沉积韵律储层水驱前沿地震监测的可行性。在此基础上给出了水驱前沿的定义,提出了时移地震监测水驱前沿的方法。通过二维和三维水驱模型合成地震数据的研究,验证了方法的可行性和有效性,同时也说明结合水驱前沿监测和初期油藏描述的结果,利用地震法可以很好地预测剩余油分布。更多还原

【Abstract】 Based on the basic rule of fluid change in water drive reservoirs,a great number of water drive experiments and statistic results of logging data in two giant oilfields of eastern China, the paper discussed in detail the oil and water migrating feature in a process of water drive for forward and inverse rhythmic reservoirs, summarized the changes of reservoirs in physical parameters (such as porosity, pressure, fluid property) and their influence on acoustic parameters for long-period water-injection recovery oilfield, expounded the feasibility using seismic techniques for monitoring the water drive front in different sedimentary rhythmic reservoirs. The definition of water drive front was given on that bases and the method of time-lapse seismic monitoring water drive front was presented. The feasibility and effectiveness of the method was proved by study of synthetic seismic data of 2-D and 3-D water drive models, at the same time, the distribution of by-passed pocket of oil can better be predicted by seismology if combining the water drive front monitoring with the results of initial reservoir description.更多还原