认识创新推动渤海海域油气勘探取得新突破——渤海海域近年主要勘探进展回顾

New breakthroughs in hydrocarbon exploration in the Bohai sea area driven by understanding innovation:a review of major exploration progresses of Bohai sea area in recent years

近年来,渤海油田在天然气和边缘凹陷新区勘探取得了重要进展。创新提出了天然气"被子"成藏模式,认为巨厚的超压泥岩形成的"被子"控制了天然气的保存条件,指导环渤中西南环天然气勘探取得了重大突破。重新认识边缘凹陷生排烃能力,完善"咸化湖盆"烃源岩发育模式,创新提出了"湖盆咸化-地壳减薄-走滑改造"三因素联控的"浅盆成烃"新认识,大大推动了渤海边缘凹陷勘探新进展。这些新认识的提出和完善推动渤海油田新区、新领域勘探取得重大突破,保障了该地区储量稳步增长,也为其他类似地区油气勘探提供了指导意义。

In recent years,great progresses have been obtained in the natural gas exploration and exploration of new areas of surrounding sags in the Bohai oilfield.A ＂quilt-like＂accumulation model for natural gas was put forward innovatively,the extensive large set of overpressure mudstones as a quilt which dominates the conservation of natural gas,such a model pointing the way forward for the natural gas exploration in southwestern Bozhong sag.Through renewal of understandings on the hydrocarbon generation and expulsion capability of surrounding sags and improvement of the pattern of source rocks development in＂saline lacustrine basins＂,new recognition for＂hydrocarbon generation in shallow basins＂has been put forward innovatively,which indicates that three factors including lacustrine basin salinization,earthy crust thinning,and strike-slip transformation jointly control hydrocarbon generation,greatly pushing forward with the exploration of surrounding sags of Bohai oilfield.As a whole,these new understandings promote major breakthroughs in the exploration of new areas and resource in the Bohai oilfield,guarantee stable reserve discovery,and provide guidance for hydrocarbon exploration of other similar areas.