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江漢采油廠:三劑“降脂藥”管壓“穩暢通”

    1月11日,江漢油區易結蠟井王東16斜-1井回壓升高,通過低壓小排量熱洗技術清蠟后,恢復正常生產。 
    進入冬季生產以來,江漢油區氣溫持續下降,井筒結蠟現象嚴重,單井、管線回壓易升高,既增加了維修成本又影響原油生產。為此,江漢采油廠開出嚴格執行摻水加藥制度、優化集輸工藝配套、加強油井串接改造“三劑降脂藥”,為易結蠟、結鹽的井筒和管線,精配冬季生產降壓“良方”,確保油井正常生產。

    該廠嚴格執行油井摻水加藥制度,利用示功圖對結蠟油井定期查蠟,制訂合理的熱洗周期,重新修訂了47口油井的加藥制度,優化了53口油井的摻水量。針對氣溫低油井回壓易升高的實際,嚴格制訂掃線運行計劃,降低油的粘稠度,減少掃線次數,降低油井回壓。對部分易結蠟油井,在油井套管上安裝定壓放氣閥,控制油井套壓,降低原油脫氣,防止原油析蠟,確保油井高效運行。同時,科學合理分配利用熱能,根據油井含水、產液量的高低,確定伴熱量大小,確保低產、低液井伴熱性能良好,降低單井回壓,保障油井正常生產。從2018年進入冬季生產以來,該廠油井掃線次數同比下降12井次。

    江漢油區原油含蠟、含膠、凝固點高,給冬季原油集輸帶來較大困難。對此,該廠做好集輸工藝配套建設,加強生產運行管理,依托集輸系統現有條件,完善集輸系統配套建設方案,確保冬季輸油管網安全暢通。該廠通過對習二站地面管網實施調整,有效降低管損,提高單井處理能力。改造后,管線供水壓力下降2.8MPa,平均日節電1334度,年節電費40余萬元。

    此外,該廠還依托信息化建設,對油井實施串接改造,減少地面系統伴熱損失,降低油井回壓,滿足生產需要。進入冬季生產以來,該廠優化廣四站地面串線,將廣平4、廣8斜-15、廣斜6、廣7-18等4口高含水井串接進廣四站,達到了取消伴熱的目的;對廣2平15、廣2斜-18、廣2平12、廣7斜-17等低產低液低含水井,采取串接進廣四站、安裝井口加熱爐、改造舊油管線等,保障了冬季外輸溫度。

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