摘要
大斜度井采用多靶点定向钻井时,靶点评价常采用圆形靶区判断井眼轨迹是否中靶。利用测井软件评价钻井是否中靶时,方位数据经软件解编后数据插值不正确;缺少靶点评价所需的设计靶点方位和靶点位移;当井斜超过85°时,现有的算法不能准确评价是否中靶。针对以上问题,提出圆柱螺线插值方法,推导出设计靶方位和靶位移计算方法,研究适合井斜大于85°井的多靶点评价方法,并编写相应解释软件。实际应用表明该方法准确可靠,提高了大斜度定向井靶点评价的精度和工作效率。
Multi-target directional drilling is often used in highly deviated wells,and circular target area is often used in target evaluation to judge whether the well trajectory is hitting the target.When using the logging software to evaluate whether the drilling is hit the target,we will encounter:the interpolati-on of the azimuth data is not correct after being solved by the software;the design target azimuth and target displacement required for the target evaluation are missing;when the well deviation exceeds 85°,the existing algorithm cannot accurately evaluate whether the drilling is hit the target.In view of the above problems,the cylindrical spiral interpolation method is proposed,the calculation method of design target orientation and target displacement is derived,and the multi-target evaluation method suitable for wells with a deviation greater than 85°is established,and the corresponding software is developed.The practical application shows that the method is accurate and reliable,and improves the accuracy and efficiency of target evaluation in highly deviated directional wells.
作者
曹孟鑫
白茹宝
吴思薇
李鹏龙
张伟杰
张荣莉
CAO Mengxin;BAI Rubao;WU Siwei;LI Penglong;ZHANG Weijie;ZHANG Rongli(Changqing Branch,China Petroleum Logging CO.LTD.,Xi’an,Shaanxi 710201,China;Jilin Branch,China Petroleum Logging CO.LTD.,Songyuan,Jilin 138000,China)
出处
《测井技术》
CAS
2020年第3期273-277,共5页
Well Logging Technology
关键词
大斜度井
方位
位移
圆柱螺线插值
井眼轨迹
立体靶点评价
highly-deviated well
azimuth
displacement
cylindrical spiral interpolation
well trajectory
three-dimensional target evaluation
