Status and challenges of Chinese deepwater oil and gas development

There have been nearly 33 oil and gas fields with billions bbl resources found in deepwater areas all over the world since 1970,so deepwater areas are of prime importance for petroleum exploration and development.With the achievements of a series of deepwater petroleum exploration technology projects in the USA,Europe and Brazil,the GOM,Brazil and West Africa are becoming the focus of deepwater oil and gas exploration.The oil productivity derived from deepwater areas exceeds that of shallow water areas in GOM and Brazil since 2001.Deepwater is becoming very important for petroleum industries and the top area of technology innovations.On the basis of analyses of world deepwater technological innovations,this paper briefly introduces the history of the China National Offshore Oil Corporation （CNOOC）,and then presents the status and challenges of Chinese deepwater oil and gas development.

半潜驳出运沉箱应用研究

沉箱出运采用气囊搬运重件工法出运,其本质是在沉箱的下面放置特制橡胶气囊,通过充气加压顶升沉箱,再在需移动的方向上使用卷扬机及滑轮组给沉箱施加足够的牵引力,在牵引力作用下沉箱对气囊产生摩擦力从而使气囊产生滚动,使之与沉箱共同向前移动。在沉箱前进的方向上,操作人员要及时跟进气囊的铺设与充气。基于#匕,在总结气囊出运沉箱施工工艺的基础上,进一步规范气囊出运沉箱的施工工艺,保证工程质量,同时指导施工和监控管理。