关键词: 渤海钻探, 垂直钻井系统, 高陡构造, 防斜打直

Abstract: In order to satisfy the technology needs of deviation control and fast drilling in precipitous and overthrust push nappe formation of the domestic oil and gas fields and fill the blank of the vertical drilling technology in China, BHDC Engineering Technology Research Institute has developed vertical drilling system tools with the German Smart Drilling Company since 2004. Through field experiment, the performance and reliability of the VDT5000 vertical drilling tools have been verified, achieving desired results. Through test and application in 10 wells, including Well Keshen3, Well Keshen203 and Well Keshen207, the highest single trip drilling depth was 1527.8m, the highest daily drilling depth was 410m, the system worked properly, the deviation angle was less than 0.5° and the ROP rose by more than 70%. Through 10 wells on-site construction and the maintenance and detection of tools, on-site construction experience has been accumulated, on-site technical service team, and testing and maintenance teams were exercised, and technical service capabilities were improved. Field application proved that the BH-VDT5000 vertical drilling system in fast drilling of precipitous and overthrust push nappe formation has significant effectiveness in deviation control, increasing ROP and shortening drilling cycle, which could be further widely applied.

Key words: BHDC, vertical drilling system, precipitous formation, deviation control and vertical drilling