Three-dimensional Coherent Approach Along The Seismic Data Layer Fault Detection Based On Applied Research

The correct interpretation of the fault is a great significance for finding oil and gas resources. The3-D coherent method is an important method of fault detection of3-D seismic data, it not only makes the fault interpretation more intuitive, but also accelerates the speed and increase the accuracy of the interpretation, It has become one of the main efficient technical of3D seismic data interpretation. So the3-D coherent method research has important significance.This paper briefly describes the experimental tools-3-D interactive display program. From three parts which are processing of the raw data, display3-D seismic data and the interaction to introduce the design and implementation of this program.Followed in full study based on three generations of coherence algorithm, selected C1coherent algorithm have combination of coherent channel mode selection test, the coherence window selection test, coherent delay selection test. Get the different coherent parameters of coherent algorithm, and select the appropriate coherence parameter for Daqing seismic data. Second C3coherent algorithm test, the experimental results show that the dip scanning technology can effectively improve the C3coherent anti-noise ability of the algorithm. Compared the results of experiment, summarized the advantage of C3than C1, and found the problem of C3coherence in folding deformation that it interpreted fault too wide. Further experiments on the artificial surface to find where the problem is when C3coherence algorithm selects coherent channels, it default think it was flat, and conceived along the same layer select coherent data can be an effective solution to this problem. The last chapter of this thesis conducted an experiment of alone the same layer coherency to verify the accuracy of this assumption. Fist, traced the layer of the data to be processed, and record the result. Then conducted the C3coherence experiment selecting the same layer data. Compared the result of new method with the traditional method, proved that along layer coherent is able to solve this problem effectively.