Method and device for constructing dynamic Poisson impedance attributes

Abstract

The invention provides a method and device for constructing dynamic Poisson impedance attributes. The method comprises the steps of: obtaining an original logging curve and a logging interpretation conclusion curve of the whole well section of a research work area; averagely dividing the two curves into a deep logging curve, a middle logging curve and a shallow logging curve; respectively calculating a static Poisson impedance attribute curve, a hydrocarbon-containing pore curve and a fluid parameter curve with undetermined coefficients of corresponding depth sections according to the three logging curves and logging interpretation conclusion data; respectively carrying out correlation analysis on the three static Poisson impedance attribute curves with the undetermined coefficients and the hydrocarbon-containing pore curve of the corresponding depth sections to obtain the undetermined coefficient corresponding to the maximum correlation coefficient; obtaining fluid parameter average values corresponding to a deep layer, a middle layer and a shallow layer; performing linear fitting on the undetermined parameter values of the static Poisson impedance attribute curves of the deep layer, the middle layer and the shallow layer and the fluid parameter average values of the corresponding depth sections to obtain a linear relational expression; and obtaining a dynamic Poisson impedance attribute curve.

Description

technical field [0001] The invention relates to a method and device for constructing dynamic Poisson impedance attributes, belonging to the technical field of petroleum geophysical exploration. Background technique [0002] With the increasing degree of petroleum exploration and development, the difficulty of exploration targets is becoming more and more difficult, and the requirements for exploration accuracy are getting higher and higher. The conventional reservoir prediction technology based on seismic information can no longer meet the requirements of high-precision reservoir identification. Requirements, especially in continental basins, such as river channels and beach bars, which are commonly developed in continental basins, have rapid changes in lateral physical properties and development of vertical multi-stage cycles, which makes it more difficult to detect reservoir physical properties and fluids, and the exploration risk is getting higher and higher. In recent ye...

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Problems solved by technology

The above methods have been widely used in oilfield development and have achieved certain beneficial effects, but there are also limitations, especially for geological problems with rapid changes in lateral physical properties and development of vertical multi-stage cycles. It is necessary to make full use of seismic information while , strengthen comprehensive analysis of seismic logging information, and continuously improve reservoir prediction methods

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