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    山東天元信息技術股份有限公司
    地址:東營市東營區南一路228號

    微地震壓裂評價

    天元微地震監測系統是天元公司自主開發的具有自主知識產權的微地震監測系統,監測系統由幾十個至上百個高性能三分量監測站點組成監測陣列,采集站點具有ZigBee和WiFi雙無線網絡通訊功能,現場監控車輛通過無線網絡實現現場監控和實時數據傳輸和處理。

    天元微地震監測系統可以廣泛應用于油氣井壓裂裂縫微地震監測、油藏長期動態監測、礦山微地震監測、山體滑坡地質災害監測等微地震監測應用場合。

    天元微地震監測系統的組成和特點:

    一、硬件系統

    1. 監測站點采集器設備

    一個微地震監測系統由多個監測站點組成,每個監測站點有一個三分量采集器和一個三分量檢波器。采集器性能指標如下:

    三通道32位同步采集,采樣時間0.25,0.5,1,2,4ms可選,1-64倍可選放大;

    具有GPS模塊,采集器自動進行GPS定位和時間同步,時間精度10ns,位置精度1米;

    內置U盤存儲數據文件,保證數據不丟失;

    具有ZigBee自組網功能,兩點直視通訊距離2400米,用于設備遠程監控;

    具有WiFi模塊,各采集器組成WiFi Mesh網絡,可以中繼和互聯;

    通過WiFi網絡上傳數據到現場服務器,能邊采集邊上傳,實現實時處理;

    外接7-9V電池供電,功耗4.8W,配套電池箱供電可連續采集至少24小時,電池可更換;

    監測站點個數多達200個;

    為微地震監測專門設計定制的高靈敏度三分量檢波器,性能指標如下:

    主頻4.5Hz,更利于接收地面微地震的低頻信號,畸變小于0.1%;

    靈敏度高達1000V/m/s;

    采用全不銹鋼外殼設計,密封性好,可埋深100米;

    • 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司圖1 單個采集器和檢波器
    • 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司圖2 公司的微地震監測設備

    2. 監測陣列組網

    一個微地震監測系統由幾十個至上百個監測站點組成一個監測陣列,每個采集器具有ZigBee和WiFi兩種無線通訊模塊,可以組成無線監控網絡。現場有一個監控車輛,監控電腦通過無線網絡監控各站點工作狀態,實時獲取采集的數據。

    微地震監測陣列組網的功能和特點是:

    站點采集器具有ZigBee通訊模塊,無需任何配置自組建無線傳感器網絡,站點之間自動互聯中繼通訊,兩點之間直視通訊距離可達2400米;

    每個采集器具有WiFi通訊模塊,可以與WiFi-Mesh路由器組成現場的WiFi-Mesh網絡;

    現場監控車輛上的監控電腦通過ZigBee網絡監測和控制站點的狀態,例如控制采集開始/停止采集、打開/關閉WiFi功能、開始/停止上傳文件等;

    各站點在將數據保存到本機的優盤上的同時,可以通過WiFi網絡向監控服務器實時上傳采集的數據文件;

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司
    圖3 天元微地震監測陣列無線組網示意圖

    現場監控車采用依維柯A39改裝,內部空間大,可放置50套設備。車內自帶發電機、UPS穩壓器,為施工時提供恒定不間斷的電源。車內包含一臺氣動升降桿,用于綁定無線通訊天線,最高可升至9米。

    • 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司圖4 現場監控車輛內景
    • 二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司圖5 現場監控車輛外觀

    二、軟件系統

    與微地震監測硬件系統配套的軟件系統主要分為三個軟件,與硬件系統組成一個完整的微地震采集----處理----解釋系統。

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司
    圖6 微地震監測軟硬件系統組成圖

    1. 現場監控軟件

    現場監控軟件主要負責在現場通過ZigBee和WiFi無線通訊網絡對各監測站點的工作狀態進行監控和實時接收采集的數據

    2. 數據預處理軟件

    數據預處理軟件負責對接收到的各采集器的數據文件進行預處理,主要是文件分割和格式轉換,多站點文件時間同步合并。

    3. 數據處理軟件

    數據處理軟件對預處理后的多道同步文件進行處理,主要功能包括:

    信號分析與濾波;

    微地震信號自動檢測;

    地層分層地震波速度模型建立;

    正演走時計算件;

    根據射孔信號進行速度模型反演;

    基于SET的震源計算;

    微地震定位結果與井軌跡結合的三維和思維顯示;

    微地震監測結果的裂縫參數計算,包括裂縫長度、高度、方位、SRV等;

    二三維地理信息系統建設、管道探測測繪、管道腐蝕檢測、影像數據處理、油田技術服務、山東天元信息技術股份有限公司
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