Research On The Construction Of Three-dimensional Geological Data Model Based On Logging Data

As a kind of non-renewable resources,oil has become the major issue which affecting national strategic security and social stability.With the growing demand for oil and the increasing shortage of oil resources,accurate and efficient exploitation of oil has become the main motivation of logging technology.Three dimensional geological model has become an inevitable trend in the development of well logging software,with its advantages such as visualization,integrity,and so on.Because of the large amount of spatial data in 3D geological modeling,the relationship between spatial object types and spatial objects is especially complex,so the spatial data model is significant.Preferable spatial data model can ensure the reasonable storage of spatial data,and it is helpful to improve the efficiency of 3D modeling.This thesis mainly researches on 3D geological data model based on logging data,including the two aspects of 3D spatial data model and spatial database.The main research contents and results are as following:(1)The spatial data models commonly used in 3D geological modeling are studied,different spatial data models are analyzed and compared.To lay the foundation for the research of this thesis,the advantages and disadvantages of each data model are summarized.(2)The classification of logging data and the characteristics of logging data spatial distribution are analyzed.The object-oriented spatial data model is studied.According to the characteristics of the spatial entity,the object-oriented 3D data model based on logging data is established,and the topological relations between objects are discussed.Finally,the data structure of 3D spatial objects is designed.(3)The spatial database of object-oriented data model is studied,the structure of spatial database is designed.Aiming at the problem of data access efficiency,the commonly used dynamic buffer management algorithm is analyzed and discussed.The Least Recently Used algorithm is improved according to the characteristics of visualization.(4)The object-oriented spatial data model which is proposed in this thesis is applied in the system of the laboratory.The performance of the improved algorithm is analyzed in cases.In this thesis,proposed object-oriented 3D data model based on logging data and improved dynamic buffer management algorithm can improve the efficiency of 3D visualization of logging data.Some functions are improved in the system of laboratory.The research of this thesis has important practical significance to promote the development of logging software industry.