Seismic waveform analysis and reservoir prediction method and device

Abstract

The embodiment of the invention provides a seismic waveform analysis and reservoir prediction method and device; the method comprises the following steps that: a target reservoir is selected; the size of a window when in seismic waveform classification is selected; a plurality of model traces are created according to the number of categories of seismic facies; different waveforms are classified according to a self-organizing neural network; seismic facies classification parameters are processed to generate a seismic facies classification diagram; sedimentary facies identification signs are established to classify the sedimentary facies of a single well, the sedimentary facies of the single well are compared to generate the sedimentary facies of a well tie, so that the sedimentary facies between the wells are determined; the seismic facies at a well point are converted into sedimentary facies by integrating the sedimentary facies of the single well and the seismic facies; external pushing is carried out towards an area which is not drilled according to the seismic waveform type of the calibrated well point; geological interpretation is carried out to the whole seismic facies diagram by integrating the sedimentary facies of the well tie, and a sedimentary facies diagram is formed from point to surface; and reservoir prediction is carried out according to the sedimentary facies diagram. According to the method, research and reservoir prediction for a sedimentary facies belt can be facilitated, so that the working efficiency of exploration is improved.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a seismic waveform analysis and reservoir prediction method and device. Background technique [0002] Due to the strong heterogeneity of carbonate reservoirs and the deep burial of carbonate reservoirs, on the one hand, this limits the use of multi-wave and large exit angle seismic data and related advanced methods; on the other hand, due to The shielding effect of the thick Permian salt dome in the Pre-Caspian Basin reduces the resolution of seismic data, and many factors make the prediction of carbonate reservoirs in the study area very difficult. At present, reservoir prediction methods such as wave impedance inversion are mostly used for reservoir prediction of carbonate rocks. Most of these methods are aimed at clastic rock reservoirs, and two basic information are often lost: ① It is not clear about the overall change of seismic signals; ② It is unclear the distributio...

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Problems solved by technology

In the process of realizing the present invention, the inventors found that the direct application of these methods to carbonate rocks is not ideal, and in the early stage of exploration, especially in the case of less well data, only using the wave impedance inversion method, The results are often ambiguous, and it is difficult to predict them accurately

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