摘要
川东地区地质情况复杂、地层变化大,高陡构造普遍倾角比较大,上部地层易斜一直以来是该地区提速的难点,常规塔式钻具、钟摆钻具、满眼钻具等被动防斜工具常常以牺牲钻压为代价来控制井斜,其防斜、纠斜能力远远不能满足复杂井、定向井及高倾角井的提速需要。针对这一难点,应用了气体钻井防斜技术、钟摆钻具带液力推进器组合钻井技术、偏轴钻具组合防斜钻井技术、VTK垂直钻井技术、三棱钻铤带滚轮划眼器防斜技术、弯螺杆带MWD防斜打直技术等特色防斜技术,提速效果明显。
In eastern Sichuan Basin, the geologic conditions are very complicated, including big variation in strata and also large stratigraphic dip for high-steep structures. So, during drilling the upper strata, deviation often occurs easily, which bring about a difficulty in ROP improvement. Furthermore, some passive anti-deviation tools such as tower drilling assembly, pendulum drilling assembly, and packed hole assembly are used to control borehole deviation by means of reduction of drilling pressure. However, their anti-deviation and straightening capacity cannot meet the demand the ROP improvement for complex, directional, and high dip wells yet. In order to solve these problems, some key technologies have been developed, including air hammer anti- deviation one, VTK vertical drilling one, triangular drilling collar with roller reaming anti- deviation one, and bended screw with MWD anti- deviation vertical drilling one. After their application, the ROP improvement was evident. These tools provide useful search for anti- deviation while fast drilling in high-steep structures.
出处
《天然气技术与经济》
2016年第6期24-26,34,共4页
Natural Gas Technology and Economy
关键词
川东
高倾角
防斜
钻具组合
eastern Sichuan Basin
high dip angle
anti deviation
drilling assembly
