Prior Information Constraint Correction Technological Research And An Example To Be Explored

In the continental oil and gas seismic exploration, the methods of static correction problem in seismic reflection data have always been one of the hot theoretical and applied research areas of concern. With the expansion of exploration in the field and the increase of accuracy required, more and more complex surface structure are being exploring, the proportion of gradual or rock exploration are increasing, the importance of static correction problem has become increasingly prominent. Static correction methods previously considered very effective, such as refraction statics, chromatography statics results were re-understanding, a prerequisite for application and application efficiency will be restricted. Seismic workers have begun to re-understanding the model static correction method which once thought to be difficult to solve surface static correction problem. To be accurately and reasonably eliminate the length, short wavelength statics problem in field data brought in the near-surface factors, the main technical problems to be resolved is how to establish a correct and reasonable near-surface model. While on the basis of stressing the quality of surface survey data collection and gathering density, using the surface model static correction technique restricted by a priori information establishes such a near surface model according to geologic deposition law, further calculates and applies the statics to solve the problem will be a important direction. Accurately estimating the statics in these areas will not only help solve the reflection wave imaging, may also avoid incorrect geological interpretation. Therefore, it is greatly significant to study and solve the static correction problem.This article relies on the seismic engineering database platform, based on the existing static correction method, develops a novel correction technique - prior information constraint correction technique. By use of the technology has matured, or nearly mature technology, we integrate a variety of geological and geophysical data, through the point, line, surface integration interactive analysis and interpretation of the surface modes, adjust to establish local regional geology of the surface structure model, calculate each shot and receiver point static correction static correction with model static correction formula ,get the final statics from the model bound of refraction or chromatography statics. This realizes high-precision imaging of a properly construct context, but also provides an alternative surface static correction technical means to solve the static correction problem. Targeting the problem of static correction and closure in the current urgent need to address in D areas for oil and gas exploration, through in-depth analysis of several static correction commonly used by current production, near-surface characteristics and treatment results in the original data, we study prior information constrained static correction technology and its application in the area, and obtained the following results:(1) We provide a new means of Static Correction to address the problem of static correction surface.(2) For the first time the technology used in DCZ area of seismic data processing, and produce a significant effect of the application to address the area of the original data processing results of static correction and closure issues.(3) In addition, through a lot of static calibration data collection and in-depth analysis, this article summarized some basic assumptions of the statics problem studied several kinds of static correction method of application conditions and the advantages and disadvantages.The application shows that the static correction methods and techniques in a large number of seismic data in the region is applicable and effective, this method of seismic exploration in the DCZ area addressed certain issues and achieved a certain effect.