Numerical Simulation And Analysis Of Reef Beach Reservoir Seismic Response Character

Carbonate rock organic reef beach are especial carbonate rock tectosome which are made up of organisms, and they are a kind of oil and gas-bearing sedimentation type in the carbonate sediment, so they have extensive hydrocarbon potential. Because organic reef beach reservoirs have strong aeolotropism, physical property differences are small between reef and non-reef, seismic data quality is relatively poor, complex structure, the difficulty to identify and forecast organic reef beach is very large, strong ambiguity and people are lack of an opinion on carbonate rock organic reef beach distributing pattern, organic reef beach become important study contents in the petroleum exploration. Earthquake numerical simulation is important bases of seismic exploration and seismology, and it is extensive applied to the seismic exploration and natural earthquake field. The development of earthquake numerical simulation has been very fast, people have developed all kinds of earthquake numerical simulation methods, and these methods are extensive and efficient applied to seismic exploration and seismology.The paper introduces the elementary theory of seismic sequence analysis, comprehensive analyzes carbonate rock organic reef beach seismic respond character, researches convolution model seismic wave field numerical simulation methods. Through applying for convolution seismic wave forward imaging principle, we simulate theoretically every type of organic reef beach, also by studying the real seismic and logging data in the South China Sea, we identify and describe particular seismic respond character and geological phenomenon of carbonate rock organic reef beach, summarize carbonate rock reef beach seismic recognition mode, discuss and analyze some traps on the seismic profile. To a certain degree, these help interpretation work of the petroleum exploration and seismic data. In this thesis, I have carried out the following work:(1)Analysis and study the sequence, seismic sequence, earthquake sequence division signs, systems tract and carbonate systems tract,and understanding the purpose of seismic sequence analysis and application of sequence stratigraphy analysis in the reef oil reservoir exploration. (2)Serious analysis the carbonate rock reef beach definition, classification, organic reef facies model, and other related concepts. And describe characteristics of organic reef beach seismic reflection characteristics. Numerical simulation theoretical reef beach on the different resolution conditions and analysis the seismic response characteristics, On the basis of geology, logging and seismic, numerical simulation and analysis real organic reef beach seismic data. Summarization the general characteristics of the seismic response of reef flat reservoir in the actual area, in addition, discuss and identify some traps on the seismic profile.(3)Careful analysis the basic principles of convolution model, forward modeling purposes, methods, wavelet type and reflection coefficient and so on. Master the convolution model algorithm, test wave field forward numerical, and compare the effect of the test. By designing geological model of the main carbonate rock reef beach types, given reasonable the seismic wave velocity, density parameter, and using convolution method simulating reef beach reservoir geological modeling, achieved fairly good results, Through the use of different wavelet types and the change of parameters p and q of Yu's wavelet, Identify and discuss the seismic response characteristics of special phenomenon on the real seismic profiles. This has a guiding role to interpretation of the seismic exploration.