CAJ | 학술논문

为解决小靶前距水平井一次造斜造斜率高所造成的技术难题，采用小靶前距水平井反位移井眼轨道设计方法。使用该方法，在不移动井口位置的情况下，通过第一次反方向造斜，增大水平井的靶前距，再采用常规造斜率设计小靶前距水平井轨道，降低施工难度。主要方法是先按常规造斜率设计计算水平井所需的靶前距，此靶前距与原小靶前距的差值即为所需的反位移量，再根据反位移段的造斜率、降斜率及造斜点深度，计算出反位移井段的最大井斜角和稳斜段长度，在此基础上设计出井眼轨道的其他参数。
위해결소파전거수평정일차조사조사솔고소조성적기술난제，채용소파전거수평정반위이정안궤도설계방법。사용해방법，재불이동정구위치적정황하，통과제일차반방향조사，증대수평정적파전거，재채용상규조사솔설계소파전거수평정궤도，강저시공난도。주요방법시선안상규조사솔설계계산수평정소수적파전거，차파전거여원소파전거적차치즉위소수적반위이량，재근거반위이단적조사솔、강사솔급조사점심도，계산출반위이정단적최대정사각화은사단장도，재차기출상설계출정안궤도적기타삼수。
The reversal displacement orbital design method can solve the technical problems of high once build-up rate in pre-target distance horizontal well.In the case of unmoving the well head,through the first time reversal building angle,the pre-target distance of horizontal well was increased by this method.Then,the trajectory of short pre-target dis-tance horizontal well was designed by the general build-up rate to reduce the drilling difficulty.The main method should be divided into three parts.Firstly,the pre-target distance should be designed by the general build-up rate,and the difference between one and original short pre-target distance is the required reversal displacement.Secondly,according to the build-up rate,drop-off rate,kick off point of reversal displacement well section,the maximum deviation angle and the maintain angle section can be calculated.Finally,based on the above calculation,other parameters of well trajectory could be designed.