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High resolution prospecting method of large-ventage clastic rock deposition stratum based on horizontal wave velocity

A technology of shear wave velocity and high resolution, applied in the field of geophysical exploration, can solve the problems that the Castanga formula cannot satisfy soft formations, fluid-bearing formations and carbonate rock formations

Active Publication Date: 2008-12-03
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0007] Therefore, the Castanga formula cannot satisfy soft formations, fluid-bearing formations and carbonate formations, and it is inaccurate to describe the relationship between P-wave velocity and S-wave velocity only with a linear relationship

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  • High resolution prospecting method of large-ventage clastic rock deposition stratum based on horizontal wave velocity
  • High resolution prospecting method of large-ventage clastic rock deposition stratum based on horizontal wave velocity
  • High resolution prospecting method of large-ventage clastic rock deposition stratum based on horizontal wave velocity

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Embodiment Construction

[0034] The well logging technology of the present invention is also called geophysical well logging technology, which is an important means of downhole oil and gas exploration. Various physical information; through data processing and interpretation of these information according to their respective physical principles and their interrelationships, the porosity, permeability, fluid properties and distribution of underground rocks can be identified, used to discover oil and gas reservoirs, evaluate Oil and gas reserves and their production.

[0035] The full-wave train logging data (comprising VSP logging) of the present invention refers to the information closely related to formation properties such as the velocity, amplitude, frequency, and waveform envelope of the first wave and subsequent fluid waves in the well recorded by a long-source-distance acoustic wave device, Information such as longitudinal waves, shear waves, and Stoneley waves extracted from them.

[0036] Cast...

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Abstract

The invention relates to a high-resolution exploration method for high-porosity clastic rock sedimentary pile based on transverse wave velocity in geophysical exploration. The method adopts the following steps: the longitudinal wave velocity and the transverse wave velocity of a logged well are intersected with the natural gamma-logging curve of the logged well; the high natural gamma value section and the low natural gamma value section are determined; straight lines are distributed at the intersection point of the high natural gamma value section and the low natural gamma value section, and according to the intercept and the gradient of the straight lines and the intersection points and the inclination angles between the straight lines and the coordinate axis, the relational expression between the longitudinal wave velocity and the transverse wave velocity of the sandstone section and the relational expression between the longitudinal wave velocity and the transverse wave velocity of the mudstone section are obtained; the transverse wave velocity of the high and the low natural gamma value sections is calculated, and the initial model of the longitudinal wave velocity and the initial model of the transverse wave velocity of the seismic working area are built; and wave impedance inversion is performed to the seismic working area by using the initial model of the longitudinal wave velocity and the initial model of the transverse wave velocity and by adopting a conventional method, so as to obtain the ratio of the longitudinal wave velocity to the transverse wave velocity of the seismic working area and to divide the lithologic characters.

Description

technical field [0001] The invention relates to geophysical exploration technology, and is a high-resolution exploration method for high-porosity clastic rock sedimentary formations based on shear wave velocity in the absence of full wave train logging and vertical seismic profile logging (VSP) data. Background technique [0002] Three-dimensional three-component seismic exploration involves types of seismic waves such as longitudinal waves, shear waves, and converted waves. Three-dimensional three-component seismic exploration is not only related to seismic data, but also requires the cooperation of full wave train logging or VSP logging data to obtain higher stratum identification capabilities in the vertical direction and to calibrate the main target strata. Since the seismic data obtained by three-dimensional three-component seismic exploration has three or more components, the processing and interpretation of three-dimensional three-component seismic data not only requi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
Inventor 陈茂山詹世凡万忠宏曹永忠
Owner BC P INC CHINA NAT PETROLEUM CORP
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