非均质薄储层强化开采时延地震监督分析

TIME-LAPSE SEISMIC MONITORING STUDY ON HETEROGENEOUS THIN RESERVOIRS FOR ENHANCED EXPLOITATION

通过对非均质砂泥岩薄储层中含油和含气时地震数据进行偏移叠加处理和互均衡化处理,总结不同流体所表现的频率、振幅等地震响应特征及时延地震监督差异属性。研究结果表明,薄储层中含气和含油两种不同流体时,薄储层中地震反应具有明显不同的特征,时延地震差异属性明显,为揭示气驱前缘波及范围、剩余油气的分布,确定不同流体(如油、气等)之间弹性差异的大小和管理监督油气藏提供了依据。

In the course of petroleum exploitation,it is often necessary to do the study of gas-drived enhanced exploitation to improve the development efficiency in thin sand-mudstone reservoir.The seismic data acquired from the heterogeneous thin sand-mudstone reservoirs containing oil or gas are migrated and stacked and are processed by using cross-equalization method.The different characteristics,such as frequency,amplitude,etc.,of different liquids are concluded,more over,the features of time-lapse seismic difference are analyzed.The result of the study can present the gas-injection advancing-frontier sweep zone and the distribution of residual oil,and can be used to define the amplitude of elastic difference between different liquids(e.g.gas,and oil,etc.)The results show that the seismic responses of the heterogeneous thin reservoir is obviously different when the different fluids,such as gas or oil,are stored in the thin reservoir,and the time-lapse seismic difference-attributes are different.The result can provide the evidence to recognize the fluid features of thin reservoir and to guide the exploration and development of petroleum.