胜坨油田老区加密井钻井技术及其应用

Application of Drilling Technology on Infill Wells in Matured Areas of Shengtuo Oilfield

摘要:

胜坨油田属于胜利采油厂老油区,油田开发进入中后期,由于经过长时间的注水开采,地层压力紊乱,且部署井网密集。为保持产量稳定,在原有老井场进行加密钻井。加密井存在着防碰绕障、井眼轨迹控制和钻井井控等技术难点,因此,根据实际钻井情况制定有针对性的技术方案和应急预案,防碰段采用“牙轮钻头 单弯螺杆”,注水井提前关井停注泄压。以胜坨油田三区1个井组(5口井)和1口单井为例,从钻井工程设计、井眼轨迹控制、底部钻具组合优化和井控技术等方面进行了分析,进而提出了解决施工难点的对策。实践证明所采取措施科学可行,为油田老区相同类井钻井提供了技术经验。

Abstract:

Shengtuo oilfield is the matured oil areas of Shengli oilfield. Oilfield development entered the later period, formation pressure disturbance is very common due to long period of waterflooding development, and the deployment of dense well pattern. To maintain the stable production, drilling infill wells in the existing well field. There is anti-collision and barrier-bypassing, wellbore trajectory control and drilling well control and other technical difficulties on infill wells, therefore, according to the actual drilling situation to develop technical plan and emergency plan, anti-collision wells use the "cone bit PDM BHA, pressure relief by stopping early water injection in injectors. Take one group (five wells) and one well as examples, engineering plans, wellbore trajectory control, BHA optimization and well control technology are analyzed, and corresponding measures are proposed, which solve the construction difficulties. The applications prove the scientific and feasible of the measures, and provide reference function for same kind of drilling in matured oilfield.