Research And Application Of Forward Response Characteristics Of Carbonate Gas Reservoir

With a large number of domestic and foreign research of carbonate reservoir geophysical response characteristics,using selective geophysical exploration methods and experience to complete the research of Seismic forward response characteristics of carbonate reservoir in Anyue gas field Gaoshiti-Moxi area Sinian system Dengying formation in Sichuan province.The carbonate reservoir in Gaoshiti-Moxi area Sinian system Dengying formation is the typical karst reservoir,located in the platform margin with 2900 square kilometers,where the natural gas reserves are amazing,and has great potential of exploration and development.But the karst reservoir heterogeneity is strong,the geological structure is very complicated,and the lack of basic research theory suitable for carbonate reservoir exploration and development,resulting in difficulty in quantitative description of carbonate reservoir seismic,serious impact on the development of the gas field effect.In order to effectively improve the description accuracy of carbonate reservoir seismic quantitative strong heterogeneity,strengthen the petrophysical analysis and seismic Gaoshiti-Moxi area Sinian Dengying carbonate reservoir forward response characteristics,this paper focuses on the rock physics research field in Anyue Gaoshiti Moxi block key wells the Sinian Dengying Formation of carbonate reservoir,to find a suitable Gaoshiti Moxi block analysis method of rock physics Dengying Formation reservoir,optimal reservoir seismic sensitive parameters to guide the reservoir prediction of natural gas;at the same time for Gaoshiti Moxi key wells in the Sinian Dengying reservoir pre stack and post stack forward modeling study,and summarized the seismic response characteristics of play,improve the response characteristics of carbonate reservoir earthquake in the research area of natural gas,natural gas in the carbonate rocks of the study area There is a clear understanding of the geophysical response characteristics.The main achievements of this thesis are as follows:(1)investigation,collection and collation of domestic and foreign related carbonate gas reservoir seismic rock physics analysis and seismic prestack and poststack forward theories and application examples,the main characteristics of natural gas in carbonate rock consolidation seismic reservoir of the forward response in china;(2)to carry out the research and analysis of seismic rock physics of key wells in Anyue gas field Gaoshiti Moxi block Dengying Formation of cashmere reservoir,including karst reservoir research,rock physics modeling method for reservoir prediction and reservoir velocity sensitive parameter optimization research,to provide help for the seismic response characteristics of the;(3)research and analysis of the forward key wells of Anyue gas field Gaoshiti Moxi block Dengying Formation of carbonate reservoir development after stack,including the production of synthetic seismic record and seismic response characteristics analysis of establishment and calibration,2D geological model,summarizes the seismic pattern recognition;(4)the forward analysis of AVO on key wells in Anyue gas field Gaoshiti Moxi block Dengying Formation of carbonate reservoir,and discusses the factors which affecting the response characteristics of AVO forward;(5)summary Gaoshiti Moxi area Sinian Dengying carbonate reservoir seismic prestack and poststack forward response characteristics.