A P-wave Velocity Prediction Method for Rock Systems in Heterogeneous Reservoirs

A technology for heterogeneous oil reservoirs and longitudinal wave velocity, which is applied in the seismology and seismic signal processing for logging records, and can solve the problem that the seismic detection engineering of heterogeneous oil reservoirs cannot be applied, the physical process cannot be completed, and the Non-uniform and complex formation engineering application and other issues
CN103412336BActive Publication Date: 2015-12-09PETROCHINA CO LTD
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2015-12-09

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a method for predicting the velocity of a longitudinal wave of a rock system in a heterogeneous reservoir. The method for predicting the velocity of the longitudinal wave of the rock system in the heterogeneous reservoir comprises the steps of (1) obtaining the permeability, the porosity, the shale content, mineral constituents, mineral volume rates and pore fluid data, (2) building a rock bare-skeleton model and an embedded body fluid model, (3) calculating the velocity of fluid inside an embedded body according to the embedded body fluid model, (4) calculating the kinetic energy function and the dissipative energy function of a double-pore medium according to the velocity of the fluid inside the embedded body, (5) using the kinetic energy function and the dissipative energy function of the double-pore medium to export an improved Biot-Rayleigh equation set according to the Hamilton principle and the Lagrange equation, and (6) predicting the velocity of the longitudinal wave of rock in the heterogeneous reservoir through plane wave analysis and the improved Biot-Rayleigh equation set. The method for predicting the velocity of the longitudinal wave of the rock system in the heterogeneous reservoir takes full consideration of anisotropism of the rock system and fluid kinetic energy caused by a fluid velocity field inside the embedded body and dissipative energy caused by the fluid velocity field inside the embedded body, can predict the velocity of the longitudinal wave of the oil-in-water double-pore rock system, overcome the defects of an original Biot-Rayleigh equation set, and retain the advantage, of the original Biot-Rayleigh equation set, of being simple in format.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of rock compressional wave prediction, in particular to a compressional wave velocity prediction method for rock systems in heterogeneous oil reservoirs. Background technique

[0002] Facing the severe situation of increasing international energy demand, the exploration of oil and gas resources is still the main work goal of various oil companies. Although with decades of exploitation, most oilfields in China have entered the late period of high water cut or even the period of extremely high water cut, the remaining oil production is still very considerable, and the remaining underground oil is in a state of "highly dispersed overall and relatively enriched locally", so In the excavation process of remaining oil in high water-cut period, it is very necessary to carry out prediction research of reservoir physical parameters. As the basis of oil and gas exploration, rock physics can provide various sensitive ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More