短语词组短语oil bearing horizon 含油地层oil l horizon 含油层group of oil bearing horizon 可采油层组Deepwater Horizon oil rig 深海地平石油钻井平台Deepwater Horizon oil spill 年墨西哥湾漏油事故Deepwater r Horizon oil rig 深海地平线钻井平台 返回 oil horizon