Transverse wave speed obtaining method and device
A technology of shear wave velocity and acquisition method, applied in the field of geophysical exploration, can solve the problems of difficult seismic wave forward modeling and seismic inversion research, difficulty in directly obtaining shear wave velocity data, low accuracy of calculation results, etc. Achieving and obtaining low-cost effects
Pending Publication Date: 2021-02-12
BC P INC CHINA NAT PETROLEUM CORP +1
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[0003] Formation shear wave velocity can be obtained from seismic shear wave data or shear wave logging data, but these two types of data are usually collected less, and in rock physics research using geophysical data, each modulus is generally obtained through laboratory experiments or from the earth. However, conventional geophysical logging often lacks shear wave data, so it is difficult to directly obtain shear wave velocity data, which brings great difficulties to seismic wave forward modeling and seismic inversion research.
At present, there are many inversion calculation methods of P-wave and S-wave velocities. For example, Jiang Xiudi and other scholars use P-wave data in different angle domains to invert P- and S-wave velocities; Wang Yumei and other scholars use rock physics S-wave velocity curve calculation technology; Well-constrained inversion and pre-stack waveform inversion are used to calculate shear wave velocity, forming a calculation method for shear wave velocity, etc., which have achieved certain research results. not tall
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[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0034] figure 1 It is a schematic diagram of a method for obtaining shear wave velocity in an embodiment of the present invention, as figure 1 As shown, the method may include:
[0035] Step 101, obtaining seismic data and acoustic time difference data in the well;
[0036] Step 102. Picking the first arrival data of the longitudinal and shear waves of the borehole seismic data to obtain the borehole seismic first arrival data of the longitudinal and shear waves;
[0037] Step 103, according to the first arrival data of the seismic longitudinal and shear waves in t...
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The invention discloses a transverse wave speed obtaining method and device. The method comprises the following steps: acquiring seismic data and interval transit time data in a well; performing longitudinal and transverse wave first arrival pickup on the seismic data in the well to obtain seismic longitudinal and transverse wave first arrival data in the well; obtaining the speed of the seismic longitudinal and transverse waves in the well according to the seismic longitudinal and transverse wave first arrival data in the well; obtaining a first longitudinal and transverse wave speed ratio according to the seismic longitudinal and transverse wave speed in the well; interpolating the first longitudinal and transverse wave speed ratio to obtain a second longitudinal and transverse wave speed ratio; according to the interval transit time data, acquiring sound wave longitudinal wave speed; and obtaining a transverse wave speed according to the sound wave longitudinal wave speed and the second longitudinal and transverse wave speed ratio. The method is high in precision, complete in data, easy to implement and low in obtaining cost.
Description
technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a method and a device for acquiring shear wave velocity. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Formation shear wave velocity can be obtained from seismic shear wave data or shear wave logging data, but these two types of data are usually collected less, and in rock physics research using geophysical data, each modulus is generally obtained through laboratory experiments or from the earth. Physical logging data is obtained, but conventional geophysical logging often lacks shear wave data, so it is difficult to directly obtain shear wave velocity data, which brings great difficulties to seismic wave forward modeling and seismic inversion research. At prese...
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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169
Inventor 蔡志东施海峰李彦鹏冉建斌刘伟王勇
Owner BC P INC CHINA NAT PETROLEUM CORP