本文選題：隨鉆密度測井 + 實時譜存儲　； 參考：《電子科技大學》2017年碩士論文

【摘要】：隨鉆密度測井儀通過伽馬射線與地層相互作用所產生的康普頓效應來測得地層密度。儀器通常使用Cs137作為放射源,該放射源的能量為0.662Me V。在能量閾值很高水平的情況下,康普頓散射為主要現(xiàn)象。儀器的探測器所檢測到的計數(shù)率由地層中的平均中子密度決定。由于儀器需要跟隨鉆頭深入地下進行探測工作,且數(shù)據無法實時大量上傳,所以需要對數(shù)據進行實時存儲。本文以隨鉆密度測井作為測量基礎,對隨鉆密度測井儀井下控制模塊設計進行了詳細的研究,包括電路的設計、軟件的編寫以及對功能調試的分析。隨鉆密度測井儀控制模塊的工作任務可以分為兩大類,一類是在地面調試時需要完成的任務,另一類是在井下開始測井后需要完成的任務。在地面調試時需要完成的任務有對存儲模塊的控制,包括存儲模塊的壞區(qū)查詢、擦除以及讀寫等操作;協(xié)助控制井徑電路板,包括對其進行擦除、發(fā)送參數(shù)等操作;接收上位機發(fā)送的各類參數(shù),包括算法參數(shù)、扇區(qū)數(shù)目、同步時間等。在測井開始后需要完成的任務有對采集電路板進行控制以及接收、處理并存儲由采集電路板獲得的譜數(shù)據;對上位機的命令進行響應,包括實時計算結果的上傳。通過對隨鉆密度測井儀井下控制模塊所需要實現(xiàn)的功能進行歸納分類,明確了電路的設計思路,同時也簡化了編程的復雜度。最后,驗證了控制模塊的所有單板功能,實現(xiàn)了設計要求。
[Abstract]:The density while drilling tool is used to measure the formation density by the Compton effect caused by the interaction between gamma rays and the formation. The instrument usually uses CS137 as a radioactive source, the energy of which is 0.662Me V. Compton scattering is the main phenomenon at high energy threshold. The rate of counting detected by the detector of the instrument is determined by the average neutron density in the stratum. It is necessary to store the data in real time because the instrument needs to follow the bit to probe underground and the data can not be uploaded in real time. Based on the density logging while drilling, the design of the downhole control module of the density logging tool is studied in detail, including the design of the circuit, the compilation of the software and the analysis of the function debugging. The task of the control module of density logging tool can be divided into two categories: one is the task that needs to be completed when debugging on the ground, and the other is the task that needs to be completed after the logging is started downhole. The tasks to be completed in ground debugging are to control the storage module, including the bad area query, erasure, reading and writing of the storage module, and assist in controlling the well diameter circuit board, including erasing and transmitting parameters, etc. Receive all kinds of parameters, including algorithm parameters, sector number, synchronization time and so on. The tasks to be completed after logging are to control and receive the acquisition circuit board, process and store the spectral data obtained by the acquisition circuit board, and respond to the commands of the upper computer, including the uploading of real-time calculation results. Through the classification of the functions needed for the downhole control module of the density logging tool while drilling, the design idea of the circuit is clarified and the complexity of the programming is simplified. Finally, all the single board functions of the control module are verified and the design requirements are realized.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P631.83

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本文編號：2099000