The Study Of Seismic Response Characteristics Of Dolomite Reservoirs

The dolomite reservoir in the central Sichuan region has enormous potential for development.However,due to the complex development of dolomite reservoirs in this area,the seismic response characteristics of dolomite reservoirs are not clear that it is difficult to carry out fine reservoir characterization.Because of the physical simulation forward modeling method was proved to be practical in solving practical problems in oil and gas production,in this paper,the physical simulation forward modeling method was used to conduct research.Combining seismic logging data,this paper studies the geological features and reservoir characteristics of the Longnusi area in central Sichuan.First,the characteristics of the study area were classified and simplified.The delineated strata are Maokou Formation to Dengying Formation,with a thickness of about 2000 m.According to the interface of wave impedance,14 layers are actually divided into layers,of which the reservoir development segments are Mao 2 Member,Qixia Bottom,Longwangmiao Group and Deng 4 Member;the type of reservoir is divided into three types according to the magnitude of wave impedance,with the siliceous layer and the water layer,the overall structure can be simplified as a north-north-east inheritance paleo-up lift with deep structural dip greater than shallow.Based on the simplified information above,a set of three-dimensional physical models of complex dolomite reservoirs are designed.Secondly,a three-dimensional model of 1200×900×210(mm)was produced according to the scale of 1:10000.Finally,the model was collected for 2D and 3D data to be processed and further analyzed.The result shows that in the buried section of the seismic section,the amplitude of the incident phase increases,and the phase of the adjacent strata will also be correspondingly enhanced.The thickness will affect the events of the reservoir and the thickness of the reservoir will increase and energy is strong.