The Research On Strategies Of Parallel Accessing Seismic Data

In recent years, with the oil exploration technology’ innovation, the data quantity isbigger and bigger. In order to improve the efficiency of seismic data processing,manysesismic data accsess methods have been proposed. Actually,in the seismic data processing,different jobs and operating environment factors affect the efficiency of data accessing.Sometimes,the sesismic data access methods are very effective,but in some cases, they are notapplicable.In order to solve the non-adaptability problem of the seismic data access methods, thispaper aproposed the seismic data parallel access model by analysising seismic data accessfeatures and access environment, research the seismic data parallel access methods, the modelcan select the best access method to adapt the job and environment. The main contents of thispaper are as follows:1. Research the seismic data featuresAnalysis of seismic data access features and access environment, get the influencefactors of seismic data access efficiency,study the relationship between them and thesituations caused by the factors change.2. Research the parallel accessing seismic data index database cluster strategyCreate the database clusters based on seismic data factors, study the current databasecluster parallel access methods and propose seismic index database cluster dynamic loadbalancing scheduling method which can dynamically assign the access requests according tothe load status of each database node. Compare and analysis the performance of accessmethods in different ways to create seismic index data parallel access model which canchoose the best method.3. Research the parallel accessing seismic data file strategyResearch the parallel accessing seismic data file methods of the domestic andinternational seismic data processing software, combined with seismic data processingenvironment, we propose a parallel seismic data file access control method which accordingto accesses the database to get data offset range,this method can both improve the efficiencyof seismic data accessing in parallel and prevent data write dirty.Seismic ata file index access method is proposed in this paper to run the data file mergejob,this method combines the indexs of seismic data files to generate a virtual seismic datafile and improves seismic data merge operation efficiency.Compare and analysis the heapplicability of each access method in different accsesing circumstances to create the seismic data file parallel access model which can choose the best seismic data file parallel accessmethod.Finally, synthesize the research contents of this paper, we expounds the realization of themodel which this paper has proposed to verifiy the feasibility and effectiveness of theories.