Air gun wavelet simulation method
A simulation method, gunlet wavelet technology, applied in the field of airgun wavelet simulation, can solve the problems of different van der Waals gas correction values, inaccurate wavelet models, and affecting wavelet processing effects, etc., to achieve high precision and model precise effect
Inactive Publication Date: 2018-05-22
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But in the van der Waals gas wavelet model established, the van der Waals correction is used as a constant, but in practice, due to the interaction between gas molecules, at different temperatures, the van der Waals The values of the gas correction amount are different. If they are still used as constants, the wavelet model will be inaccurate and affect the effect of subsequent wavelet processing
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0045] The present invention will be further described below in conjunction with embodiment.
[0046] When the shock source of the air gun is working, the high-pressure gas in the gas storage cylinder enters the gun chamber. Since the air entering the closed air chamber cannot do work outside, all the work done is converted into heat, so the temperature of the air in the gun chamber will increase. The high-pressure gas in the gas chamber is sprayed into the water to form bubbles, and the surrounding seawater and the gas at the bubble wall will exchange heat, resulting in energy loss.
[0047] This process of forming bubbles is a completely quasi-static open thermodynamic system. According to the law of conservation of energy, for a quasi-static open thermodynamic system, due to changes in gas transfer and heat exchange between gas and seawater, the energy obtained by the bubble must be in balance with the change in the internal energy of the bubble, so the complete quasi-stati...
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 PUM
Login to View More Abstract
The invention belongs to the seismic ocean data processing field and relates to an air gun wavelet simulation method. According to the method, van der Waals correction is no longer adopted as a constant, instead, a first quasi-static open thermodynamic system equation is adopted, wherein the equation is a function of temperature; and when the equation is adopted to simulate an air gun wavelet model, the influence of temperature change on a simulation effect is fully taken into account. Compared with a simulation method which does not consider temperature influence and adopts the van der Waalscorrection as a constant, the air gun wavelet simulation method of the invention can obtain a model which is closer to an actually measured air gun wavelet model, and the method of the invention has higher simulation accuracy.
Description
technical field [0001] The invention relates to the field of seismic ocean data processing, in particular to an airgun wavelet simulation method, which is based on a high-precision van der Waals gas model and is used to solve the problem of wavelet simulation in the middle and far fields of wavelet processing. Background technique [0002] In marine seismic exploration, airgun wavelet signals and instrument recording signals are non-minimum phase wavelets. When performing wavelet processing, the far-field wavelet signal of the source must be measured or estimated, and the actual measurement process on site is time-consuming and laborious. Therefore, in practical applications, numerical simulation is mainly used in combination with the actual working conditions of the air gun. Realize airsoft wavelet simulation. The specific simulation method is mainly to regard the gas in the air gun as a non-ideal gas, and use the van der Waals gas theory to establish the van der Waals gas...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 刘晨徐颖张印堂马方正白帆高厚强邵文潮
Owner CHINA PETROLEUM & CHEM CORP