A Method of Reservoir Prediction Using Seismic Phase Volume

Abstract

The invention discloses a method for predicting reservoir stratums through seismic phase bodies. The method comprises the following steps that (1), a sampling area is analyzed, and by combination with a well-logging curve of the sampling area, classification and interpretation according to the types of seismic phases are conducted on rock stratums of the sampling area; (2), according to well-logging data of longitudinal waves and transverse waves above a well, a four-dimensional rock physics analysis template is built; (3), transverse coordinates and longitudinal coordinates in the four-dimensional rock physics analysis template in the step (2) are replaced, a new elastic impedance parameter analysis template is obtained, and according to the elastic impedance parameter analysis template, a judgment relation F2 between the types of the seismic phases and elastic impedance parameters is identified; (4), far angle and near angle offset radial elastic impedance parameters of a target area are inverted, and the types of seismic phases in the target area are identified through the F2. By means of the method for predicting the reservoir stratums through the seismic phase bodies, data of porosity need not to be inverted, and the purpose of predicting the high-quality reservoir stratums can be achieved.

Description

technical field [0001] The invention belongs to the field of petroleum exploration and relates to a method for predicting reservoirs by using seismic phase volumes. Background technique [0002] With the continuous deepening of exploration, low-porosity and low-permeability reservoirs have gradually become the hot spot of current exploration. Therefore, in low-porosity and low-permeability areas, finding sweet spots (high-quality reservoirs) is a very urgent production problem. However, in seismic reservoir prediction, the prediction of physical properties (porosity and permeability) is a difficult point. For reservoir porosity prediction, it is generally necessary to establish a velocity-porosity relationship. Whether this relationship is linear or nonlinear, it varies with time and space with changes in longitudinal compaction and lateral deposition. [0003] Therefore, it is difficult to establish an accurate petrophysical model, resulting in low prediction accuracy whe...

AI Technical Summary

Problems solved by technology

Although the main factors controlling the development of reservoir pores are different in different regions, the evolution of reservoir pores is invariably controlled by two factors: deposition (grain size, sorting) and diagenesis (compaction, cementation, dissolution).

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