非对称式水下钻井基盘在渤海边际油田勘探开发中的应用

Application of Asymmetric Underwater Drilling Baseplate in Exploration and Development of Marginal Oilfield in Bohai

渤海有大量储量规模小、地质条件复杂、经济开采年限短的边际油田,在常规的开发模式和技术下难以得到有效开发。边际油田开发的关键在于其经济性,为了规避油田整体开发风险,降低投资,提高收益率,采用了延长测试的评价模式和"蜜蜂式"开采模式。为了满足油田整体开发需要,设计并制作了三孔非对称水下井口基盘,与泥线悬挂器结合作业,实现测试结束后临时弃井,在油田整体开发阶段将套管回接恢复生产。为渤海后续的边际油田开发提供了降本增效的新模式,将盘活大量尚待开发的边际油田,带来巨大的经济效益与社会效益。

There are lots of marginal oilfields with small reserves,complex geological conditions and short economic exploitation periods in Bohai.It is difficult to develop effectively under conventional development mode and technology.The key to the development of marginal oilfields is economy.In order to avoid the risk in the overall development of oilfield,we need reduce investment,increase the rate of return and use the“bee”mining mode.In order to satisfy the needs of the overall development of the oilfield,an asymmetric three-hole underwater baseplate is designed and made.Combined with the mud line hanger,temporary abandonment of the well after the extension of the test well test is achieved,and the production will be put back in the whole development stage of the oilfield.It provides a new mode of reducing cost and increasing efficiency for Bohai's subsequent marginal oilfield development,which will bring huge economic and social benefits,revitalizing a large number of marginal oilfields yet to be developed.