Abstract: Influenced by gradual global economic resumption and oil price hike, international oil majors saw a series of characteristics in their business operation in the first half of 2017, such as stable growth in oil and gas production, fall of crude processing amount, dramatic growth in business performance, remarkable enhancement of upstream profit-making ability with downstream business performance becoming divided, continual slide in capital expenditure, “downstream rising while upstream declining” in investment structure on a short-term basis, more importance attached to short-term highreturns projects, business cash flow rising substantially, and free cash flow turning into positive from negative. This article analyzes the strategic orientations adjusted by five international petroleum majors in recent years. They have focused on their advantageous areas for centralization of the assets, converting into “specialized type” from “multi-element type”. They are also in the transition from “oil and gas companies” to “gas and oil companies” to increase investment into natural gas business and from “fuel type” to “fuel type + raw material type” oil refining and chemical companies to optimize refinery assets and accelerate chemical business development. They held different opinions on the future of new energy business. International petroleum majors have adopted a series of strategic measures, such as actively adjusting their strategies, making efforts for conversion of assets and business and focusing on the advantageous areas. Those measures have played an active role in maintaining business stability and competitive position, seeking sustainable development and making response to energy revolution at the time of low oil prices.

摘要： 英西地区是近几年青海油田增储上产的重点区域，但由于地层含盐且出盐量大，盐结晶速度快，很多油 井投产后因生产通道堵塞致使产量急剧下降，给勘探开发工作带来很大阻力。针对这一难题，以“下得去、出得来、 伤害小”为原则，制定了以旋流喷射工具冲盐+ 旋转喷射工具扩眼+ 热水溶盐为主，螺杆钻具钻磨、扶正喷射等为辅 的多种连续管冲盐解堵方案，同时设计加工了旋流喷射工具、旋转喷射工具、尖状工具等多种冲盐工具，并在施工中 不断优化工艺参数，形成连续管冲盐解堵工艺系列技术，成功应用近50 井次，为高压高产油井的正常生产提供了有力 保障。

关键词: 连续管, 盐结晶, 冲盐解堵, 喷射洗井, 英西地区