Prediction method and device of oil deposit seismic reservoir

Abstract

The invention provides a prediction method and device of an oil deposit seismic reservoir. The method comprises steps of extracting seismic attributes from an oil deposit seismic data; according to sensitivity analysis of the seismic attributes to the reservoir, similarity analysis between the seismic attributes and correlation analysis of the seismic attributes to the reservoir, optimizing the seismic attributes so as to obtain optimized seismic attributes; according to the optimized seismic attributes, establishing a prediction model of the reservoir thickness; and according to the prediction model of the reservoir thickness, predicting the oil deposit seismic reservoir. According to the invention, efficiency and precision of the reservoir prediction are improved.

Description

technical field [0001] The invention relates to the technical field of seismic reservoir prediction of oil reservoirs, in particular to a method and device for seismic reservoir prediction of oil reservoirs. Background technique [0002] Seismic attributes are extracted from seismic data according to a certain method and can reflect reservoir characteristic parameters, such as amplitude, frequency, phase, energy, waveform and ratio, etc. There are many types of seismic attributes. Usually, the correlation between seismic attributes and actual interpretation of reservoirs is used to convert seismic attributes into reservoir attributes, and then predict interwell lithology and physical property changes, but it is limited to the qualitative judgment of a single attribute, which has limitations. [0003] At present, the method of reservoir prediction using seismic attributes has gradually developed from a single-attribute, qualitative evaluation stage to a multi-attribute, quant...

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Problems solved by technology

Usually, the correlation between seismic attributes and actual interpretation of reservoirs is used to convert seismic attributes into reservoir attributes, and then predict interwell lithology and physical property changes, but it is limited to the qualitative judgment of a single attribute, which has limitations

[0003] At present, the method of reservoir prediction using seismic attributes has gradually developed from a single-attribute, qualitative evaluation stage to a multi-attribute, quantitative evaluation stage. In addition, the complexity of underground geological conditions makes the geological laws summarized in a certain block not The general rules cannot adapt to the geological characteristics of all blocks, and specific analysis is required for specific situations. Therefore, in the actual analysis process, the workload is very large, resulting in low efficiency and low accuracy of reservoir prediction

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