CAJ | 학술논문

渤海油田目前低效井越来越多.新钻调整井或治理低效井面临着成本高、手段单一等难题.针对此问题,通过分析渤海油田稳产现状、剩余油分布规律,提出了低效井侧钻的必要性.根据渤海油田钻完井技术水平,提出了利用平台现有修井机进行低效井侧钻中短半径井眼的低成本侧钻思路,分析了钻完井方案可行性,评估了修井机作业能力.研究结果显示,渤海常规的φ152.4mm钻头+动力钻具+随钻测井工具(LWD+MWD)+非磁钻铤+震击器+钻杆的钻具组合可实现10°/30m以下的造斜率要求.优化的侧钻小井眼的井身结构和完井防砂技术方案适用于渤海油田的侧钻井作业.目前海洋修井机从提升能力、最大扭矩、水力清洁等方面均能满足侧钻井要求,海上平台现有修井机进行低效井中短半径井眼的侧钻作业在渤海油田具有可行性.结合具体实例进行了低效井侧钻技术应用经济效益评估,侧钻中短半径井眼技术及优化管理措施可大幅度降低钻井成本,提高经济效益.
발해유전목전저효정월래월다.신찬조정정혹치리저효정면림착성본고、수단단일등난제.침대차문제,통과분석발해유전은산현상、잉여유분포규률,제출료저효정측찬적필요성.근거발해유전찬완정기술수평,제출료이용평태현유수정궤진행저효정측찬중단반경정안적저성본측찬사로,분석료찬완정방안가행성,평고료수정궤작업능력.연구결과현시,발해상규적φ152.4mm찬두+동력찬구+수찬측정공구(LWD+MWD)+비자찬정+진격기+찬간적찬구조합가실현10°/30m이하적조사솔요구.우화적측찬소정안적정신결구화완정방사기술방안괄용우발해유전적측찬정작업.목전해양수정궤종제승능력、최대뉴구、수력청길등방면균능만족측찬정요구,해상평태현유수정궤진행저효정중단반경정안적측찬작업재발해유전구유가행성.결합구체실례진행료저효정측찬기술응용경제효익평고,측찬중단반경정안기술급우화관리조시가대폭도강저찬정성본,제고경제효익.
There are more and more low-production wells in Bohai Oilfield. At present, drilling adjustment wells or admin-istering inefficient wells are faced with such problems as high cost and less means. For this, we analyzed production status and residual oil distribution of the Oilfield, and found it necessary to use sidetrack drilling technology for inefficient well drilling. According to the drilling and completion technology, we proposed to use workover rig for sidetracking of middle-short radius wells, analyzed the feasibility of drilling and completion programs, and evaluated the marine workover rig ca-pacity. It was shown that the conventional drilling assembly of φ152.4mm drill bit+motor+logging while drilling tool ( LWD+MWD) +non-magnetic drill collar+jar+drill pipe could achieve the build-up rate below 10°/30m. The optimized well-bore configuration of sidetracking slim hole and technical program for completion and sand control are applicable for side-tracking drilling in Bohai Oilfield. Present offshore workover rigs could satisfy sidetrack drilling needs in terms of enhancing capacity, maximum torque, hydraulic cleaning, and etc. It is feasible to carry out sidetrack drilling for short-radium bore-hole in inefficient wells with present offshore workover rigs. Combined with case study, we assessed the economic results of applying sidetrack drilling technology to inefficient wells and found that short-radium borehole technology and optimized management measures during sidetrack drilling could greatly reduce drilling cost and enhance economic results.