Research And Application Of Seismic Prediction And Evaluation In High Quality Reservoir

The core of this thesis is researching some methods for the seismic prediction of the high-quality oil and gas reservoir. This is paper based on the actual seismic data of Well DA10 in MD area of Jung Gar basin, and combined with regional geological and logging data to carry out the high-quality reservoir prediction.Firstly, combining with all kind of data to analysis the formation mechanism of the high-quality reservior of Baikouquan and summaring the main controlling factors of high-quality reservoir in this area: 1) profitable sedimentary facies belt; 2) the development of the fracture; 3) profitable area of lithologic and physical properties Combining the seismic sections, seismic waveform classification technique andseismic attribute analysis technique to distinguish the profitable fan delta frontal subfacies in MD area. The study area had been formed through the geological tectonic movement, The conclusion is that fractures in the study area is mainly caused by structural movement. Based on the actual situation to select seismic frequency coherent technology, weighted directional coherence analysis and curvature attribute analysising. The fracture zones of the study area have been identified. Using post stack seismic data to do amplitude attribute analysis by various frequency, to do post stack sparse spike inversion, inversion of logging parameters based on neural network,and combining with a preliminary analysis of the prestack AVO, it is predicted that high quality reservoir lithology and physical properties of DA10 wells Area 3D seismic data range in Baikouquan formation.This study explains faults and fracture system of the DA10 well area, and has implemented for two fault-block traps of the DA13 and DA14. The study indicated that the fractures in the study area mainly is the fault which associated with fractures,4 pieces of high quality areas in DA10 well area in total of have been implemented.The favorable reservoirs are: DA13-DA14-YAN001-XY2-YAN002 wells region,DA11 well and the South West region, YB2 wells region, DA10 well and south region.The above research results provide a favorable support for the exploration anddeployment of the study area. This study establishes seismic prediction methods and the working process fro high-quality of oil and gas reservoir, which can be applied to and the similar regions in the future.