Cloud Data Management And Analysis Of Geological Exploration While Drilling With Array Electrode Method

Drilling is a common exploration method,which has the advantages of high precision,strong intuition and wide adaptability.Electrical exploration is a widely used physical exploration method.Therefore,how to effectively combine drilling with electrical exploration to get more two-dimensional and three-dimensional geological information around the borehole,is a geophysical exploration subject with wide application prospect.For the above purpose,the novel array electrode while drilling instrument was developed in the laboratory.To solve the related data acquisition,storage,processing and inversion analysis,a cloud data management and analysis system has been developed for array electrode while drilling geological exploration.Based on the analysis of the current situation of geophysical exploration and drilling technology,combined with the principles of drilling and direct current exploration,this paper puts forward the detection while drilling model of array electrode method.According to the model,the electromagnetic finite element simulation software Maxwell is used to study the influence of different geological resistivity in the model on the electrical parameters between the drill pipe as A electrode and the B reference electrode with a certain distance from the drill pipe,to analyze two-dimensional structure.The system includes control software module and cloud data management module.The control software is designed with Qt application development framework based on QML language and C++.It runs on the mobile tablet computer and communicates with hardware instruments through Wi Fi.The software is mainly divided into three parts: project management,parameter setting and data management.In order to ensure the reliability of data communication,the wireless communication protocol with hardware equipment is designed.The protocol includes acquisition command package,stop command package,data transmission package,response command package and so on.The control software can control the related parameter setting and acquisition of the hardware instrument,and save the collected data in the local standard format.The main purpose of cloud data management system is to solve the problems of cloud storage,detection results and analysis report sharing of geological exploration while drilling data of array electrode method.The system consists of two parts: user and administrator.The user includes login module,file management module and user information module.The administrator side includes user background information management module,file classification and archiving module,file authority management module and system configuration module.For the above functional modules,the database models of File Record class,Group class,User class,Authority class and File class are designed.The system uses FTP protocol to upload and download data and exploration report.In the design of the administrator side,for the security of users and file data,the administrator side joins the rights management module for users and files,which implements the hierarchical management of data.In the processing of the collected data,the data are filtered and preprocessed,and the apparent resistivity of the formation around the borehole is calculated by using the apparent resistivity formula of Direct current method.In the geological plane mapping of apparent resistivity,this paper compares three interpolation algorithms:multiple regression method,local polynomial method and Kriging interpolation.Through the comparison of apparent resistivity imaging results,it is concluded that the Kriging interpolation algorithm has better effect and conforms to the geological structure of the formation.After the completion of the system,the function test is divided into two parts,including the parameter setting of the control software,the waveform display test,and the file upload and download,data retrieval and user permission test of the cloud data management system.The test results show that the functions of each module are stable and meet the system design requirements.In the field test,the system is used for field application,the apparent resistivity of the collected data is calculated,the two-dimensional resistivity imaging map is obtained,and the exploration report is uploaded to the cloud data management system.During the test,the whole system runs normally and stably to meet the needs of data management and analysis of geological advanced exploration.