Method and device for accurate reflection coefficient analysis of seismic waves
A technology of reflection coefficient and seismic wave, applied in seismology, measuring equipment, seismic signal processing, etc., can solve the problems of limiting the application range of AVO three-parameter inversion and the limited accuracy of approximate formulas
Active Publication Date: 2018-09-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0003] Conventional AVO three-parameter inversion usually uses the approximate formula of the Zoeppritz equation (Aki-Richards approximation and Fatti approximation, etc.) to establish the process of AVO forward modeling simulation. The accuracy of the approximate formula is limited, which limits the application range of conventional AVO three-parameter inversion
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[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0062] see figure 1 , which shows a flow chart of a seismic wave accurate reflection coefficient analysis method provided by an embodiment of the present invention, which may include:
[0063] S11: Obtain the longitudinal wave incident angle θ p1 , longitudinal wave transmission angle θ p2 , S-wave reflection angle θ s1 , shear wave transmission angle θ s2 , P-wave velocity v p , shear wave velocity v s , longitudinal wave reflection coefficient rp, shea...
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The invention discloses a seismic wave precise reflecting coefficient analysis method and device. The method comprises the following steps that a longitudinal wave incidence angle theta p1, a longitudinal wave transmission angle theta p2, a transverse wave reflecting angle theta s1, a transverse wave transmission angle theta s2, longitudinal wave speed vp, transverse wave speed vs, a longitudinal wave reflecting coefficient rp, a transverse wave reflecting coefficient rs and a density reflecting coefficient rd are acquired; the seismic wave reflecting coefficients are analyzed according to the following formula (the formula is shown in the specification). According to the technical scheme, the seismic wave precise reflecting coefficient analysis method has the advantage of being high in precision, furthermore, the process of setting up AVO forward modeling is utilized, the limit on the application range of conventional AVO three-parameter inversion can be avoided, and therefore the problem existing in the prior art is solved.
Description
technical field [0001] The invention relates to the technical field of post-stack inversion, and more specifically relates to a seismic wave accurate reflection coefficient analysis method and device. Background technique [0002] Post-stack inversion uses post-stack seismic data to mainly invert formation compressional wave information. Pre-stack seismic data contain a lot of information that post-stack data do not have. In addition to the inversion of P-wave information, information such as formation shear wave, density, rock modulus, and fluid sensitivity parameters can also be estimated. Therefore, pre-stack seismic inversion is widely used. for reservoir prediction and fluid identification. [0003] Conventional AVO three-parameter inversion usually uses the approximate formula of the Zoeppritz equation (Aki-Richards approximation and Fatti approximation, etc.) to establish the process of AVO forward modeling simulation. The accuracy of the approximate formula is limi...
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IPC IPC(8): G01V1/30
CPCG01V1/306G01V1/307G01V2210/62G01V2210/67
Inventor 宗兆云印兴耀程广森
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)