The Study Of Optimal Design Of 3D Seismic Observation System

How to aim at the actual seismic data,scientific and reasonable in design and optimization of high-density seismic acquisition parameters,and reduce the economic costs.There are few researches at present.The main research area in this thesis,which has complex igneous rock development zone.In this area,it is difficult to get the structure imaging and exploration.And conventional technology is hard to obtain the ideal effect.With the gradually improved exploration level and the more exploration of volcanic rock reservoirs,there are still many geological problems about the volcanic rock reservoirs need to be researched and solved.So the inquiry of exploration technology and ideas,which is suitable for igneous rock basin reservoirs in our country,is profound and meaningful.We use high-density bunch of 3D technology to solve the imaging problems in D basin.But the technology application in reservoir exploration is limited by economic cost.There are such disadvantages: occupy abundant resources,high exploration cost,a wide range of hard promotion,resulting from the enhanced acquisition parameters.Therefore,optimization of system parameters,for scientific and reasonable design is necessary.While guarantee the quality of seismic data,we obtain the higher ratio of observation system parameters,which Provided sufficient and reliable information for exploration and deployment.In this thesis,we have been analyzed and summarized the seismic data carefully for complex underground geological structure and changeable geological conditions in D basin.Demonstrated the parameters.Combined the demand of oil and gas exploration in recent years with the main technical problems to get the comprehensive analysis and summary.Through the study of the parameters,the method is optimized to improve.We have test and analysis the actual seismic data(Through changing bin,folds,receiver spacings of crossline,observation ways,explosive quantity),obtained stacked section of the different ways.Through comparing,take exploration cost into consider,to get the optimal ratio of observation system.On the premise of to ensure the quality of seismic data imaging,around the actual cost,we can improve the signal-to-noise ratio and resolution of the field data.Based on the actual data analysis,successfully completed the 3D observation system optimization design research in D basin.Results won the recognition and application after return to the company.To further promote the seismic exploration of igneous in D basin,we found more economic and feasible observation method,and got more optimized parameters for rolling exploration to guide the blocks.This thesis builds a set of observation system optimization design method for volcanic rock reservoirs,lay a foundation for solving the problem of similar work area and in-depth exploration.It has certain reference significance and practical value for volcanic reservoir exploration.