4月13日，我國首口自主設計實施的海上超深大位移井 — 恩平21-4油田A1H井在距離深圳200公里的珠江口盆地海域投產，測試日產原油超700噸。請看本報16日報道： China’s first independently designed ultra-deep large-displacement well, the Enping 21-4 oilfield A1H well, has commenced operations. The well is located about 200 kilometers southwest of Shenzhen in the South China Sea and has a tested daily production capacity of over 700 tons of crude oil. The Enping 21-4 oilfield, where the ultra-deep well is located, has an average water depth of about 86 meters and is classified as a small sandstone marginal oilfield. 文中的marginal oilfield指的是一些中、小型油田或地層構造復雜及地處邊遠的油田。由于儲量有限、該地區缺乏基礎設施以及開發成本過高，這些油田通常仍未開發。 | 