Well-to-seismic collaborative sedimentary microfacies division method based on high-precision sequence framework model

Abstract

The invention discloses a well-to-seismic collaborative sedimentary microfacies division method based on a high-precision sequence framework model, and the method comprises the steps: building a matching relation of well-to-seismic sedimentary facies features based on the lithologic combination of a stratum under a high-precision sequence stratum shelf and the seismic response features of sedimentary body cycle features, and optimizing the seismic attributes sensitive to the types of stratum sedimentary facies; and establishing a three-dimensional data volume for researching sedimentary subfacies and microfacies of a target layer through well-to-seismic collaborative simulation. And verifying the reliability and accuracy of the sedimentary facies three-dimensional data volume through a phase sequence rule, and finally obtaining a sedimentary facies division result suitable for industrial standards. According to the three-dimensional data volume of the sedimentary microfacies, the working efficiency of sedimentary facies division can be greatly improved, the transverse resolution and the longitudinal resolution are high, and the determinacy and the reliability of sedimentary microfacies fine division results are higher.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for well-seismic cooperative division of sedimentary microfacies based on a high-precision sequence framework model. Background technique [0002] Drilling and logging data and seismic data are important basis for sedimentary facies division. Drilling and logging data can better reflect the characteristics of lithology combination, porosity and permeability, and oil and gas properties of formations on the well point trajectory through well logging, mud logging and core sampling. This kind of data has extremely high precision, and can reflect the characteristics of centimeter-level rock formations and oil and gas layers at the highest level, and can characterize the combination of stratigraphic sedimentary facies sequences and the vertical changes of sedimentary subfacies and microfacies. However, such vertical and high-precision sedimentary facies change...

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Problems solved by technology

Therefore, the traditional method of well-seismic collaborative division of sedimentary facies has shortcomings such as strong human factors and insufficient data information mining, especially at the level of sedimentary microfacies, which is often a collection feature of dominant sedimentary facies within a certain range, and the uncertainty of the boundary is relatively large. Large, which greatly limits the industrial application of this type of research results

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