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礦區生產輸氣管線之整合更新及改善

Improvement of Transmission System in Oil & Gas Field

摘要


礦區輸送管線將各井生產之油氣送至適中地點匯合後,轉接較大管徑分區送入汽油廠處理後銷售。因此,在礦區開發之始,即視生產情況、進廠壓力及地理途徑等因素,採以單相(天然氣或原油)單獨輸送或油氣水(氣-液)混合的兩相輸送,以求最經濟的輸送方式。永和山與錦水礦區之油氣輸送管線距離不一,受當時設計規劃之限制,不易改變操作方式,尤其是經過20餘年的生產,加上各生產井開發時間長短不一,井口生產流壓高低有別,如全部均以同一壓力進廠處理,往往失之東隅,無法周全。有鑑於此,錦水礦區的使用管線,多年來,配合礦區管線的增設、青草湖礦區的流程改善、白沙屯區新管線的鋪設以及管線汰舊換新計畫等等的施工,進行管線局部增設或改裝,已完成錦水礦區之輸送管線高低壓分別輸送的流程,可配合汽油廠增設之昇壓機的運轉,分別以高壓(450Psi)與低壓(250Psi),或全部高、低壓之輸送方式進廠處理,有效的提高油氣採收效益,並延長管線的使用年限。

並列摘要


This article describes the improvement of oil & gas transmission system in the YHS field and CS field. At the early stage of production, the formation pressure is high enough for liquids & gas two-phase flow inside pipeline. But when the formation pressure decline too low to support two-phase flow, the system was modified to a gas single phase flow only, liquids was kept in stock tank in well site and transported by tank car to the CS gasoline plant. In order to recover more reserves, the pipeline system was separated into higher pressure system and lower pressure system from manifold. After modification, the well head abandon pressure drop from 500psi to 250psi, and the total recovery be improved efficiently.

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