公开(公告)号：US09932819B2

公开(公告)日：2018-04-03

申请号：US14428557

申请日：2013-09-16

Applicant: SHELL OIL COMPANY

Inventor： Jan-Jette Blangé ,  Koen Antoine Noy

IPC: E21B47/022 ,  E21B7/04

CPC classification number: E21B47/02216 ,  E21B7/04

Abstract: A method for creating a second borehole in an earth formation at a selected orientation relative to a first borehole, wherein a position parameter represents a position of the first borehole. The method comprises: a) providing a borehole element that generates a magnetic field; b) measuring the magnetic field; c) installing the borehole element in the first borehole; d) measuring the magnetic field in the second borehole; e) providing a finite element model of the magnetic field; f) calculating the magnetic field in the second borehole using the finite element model, and determining a difference between the calculated magnetic field in the second borehole and the measured magnetic field in the second borehole; g) adjusting the position parameter so as to minimize said difference; and h) determining a selected direction dependent on the adjusted position parameter and further drilling the second borehole in the selected direction.

公开(公告)号：US20150240623A1

公开(公告)日：2015-08-27

申请号：US14428557

申请日：2013-09-16

Applicant: SHELL OIL COMPANY

Inventor： Jan-Jette Blangé ,  Koen Antoine Noy

IPC: E21B47/022 ,  E21B7/04

CPC classification number: E21B47/02216 ,  E21B7/04

Abstract: A method for creating a second borehole in an earth formation at a selected orientation relative to a first borehole, wherein a position parameter represents a position of the first borehole. The method comprises: a) providing a borehole element that generates a magnetic field; b) measuring the magnetic field; c) installing the borehole element in the first borehole; d) measuring the magnetic field in the second borehole; e) providing a finite element model of the magnetic field; f) calculating the magnetic field in the second borehole using the finite element model, and determining a difference between the calculated magnetic field in the second borehole and the measured magnetic field in the second borehole; g) adjusting the position parameter so as to minimise said difference; and h) determining a selected direction dependent on the adjusted position parameter and further drilling the second borehole in the selected direction.

Abstract translation: 一种用于在相对于第一钻孔选择的方向上在地层中产生第二钻孔的方法，其中位置参数表示第一钻孔的位置。 该方法包括：a）提供产生磁场的钻孔元件; b）测量磁场; c）将钻孔元件安装在第一钻孔中; d）测量第二钻孔中的磁场; e）提供磁场的有限元模型; f）使用有限元模型计算第二钻孔中的磁场，并且确定第二钻孔中计算的磁场与第二钻孔中测量的磁场之间的差; g）调整所述位置参数以使所述差异最小化; 以及h）根据所调整的位置参数来确定所选择的方向，并且进一步在所选择的方向上钻取所述第二钻孔。