公开(公告)号：US20180347280A1

公开(公告)日：2018-12-06

申请号：US15764832

申请日：2016-09-26

Applicant: Schlumberger Technology Corporation

Inventor： Helen Xiaoyan Zhong ,  Steve F. Crary ,  Mark T. Frey

IPC: E21B7/04 ,  G01V3/38

CPC classification number: E21B7/04 ,  G01V3/28 ,  G01V11/005

Abstract: A drill string can include an electromagnetic transmitter oriented at an actual effective tilt angle with respect to the drill string and an electromagnetic receiver oriented at an actual effective tilt angle with respect to the drill string. The transmitter and received can be used to investigate geologic formations surrounding the drill string, and measurements of the geologic formations can be based on the actual effective tilt angles of the transmitter and the receiver. Forward modelling software can use the actual effective tilt angles of the transmitter and the receiver to predict measurements of the geologic formations