A Thin Layer Prediction Method Based on Slice Superposition

Abstract

The invention discloses a thin layer prediction method based on slice superposition, comprising the following steps: S1, determining the time positions of the target layer and the interference layer; S2, extracting the amplitude slices of the target layer and the interference layer; The coordinate position of the interference point, and extract the amplitude of the non-interference point of the interference layer; S4, calculate the stacked slice. Based on conventional formation slices, the present invention weakens the adjacent layer interference by superimposing slices of the interference layer and the target thin layer, clearly depicts the distribution range of the target thin reservoir, and solves the problem of inaccurate slice range prediction results caused by thin layer interference. Therefore, it can effectively improve the prediction accuracy of thin reservoirs.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration, in particular relates to the prediction technology of thin interbedded reservoirs in the exploration of lithologic stratum oil and gas reservoirs, and specifically designs a thin layer prediction method based on slice superposition. Background technique [0002] Thin reservoirs are the main storage space for lithologic-stratigraphic reservoirs in continental basins in my country. The thickness of reservoirs is generally less than a quarter of the wavelength. The interference of adjacent layers is the fundamental reason why conventional seismic data cannot identify thin reservoirs. At present, there are mainly two types of technologies for thin reservoir prediction. Among them, using inversion technology to vertically distinguish thin reservoirs and adjacent layers is the main technical idea of ​​thin layer prediction at present. Since inversion technology cannot directly improve the ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of difficult prediction of thin layers caused by adjacent layer interference in the prior art, and provide a method based on conventional stratum slices, which can weaken adjacent layer interference by superimposing slices of interference layers and target thin layers, and clearly describe The thin-bed prediction method based on slice superposition can effectively improve the prediction accuracy of thin reservoirs by knowing the distribution range of the target thin reservoirs.

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