SYSTEM AND METHOD FOR DETERMINING DOWNHOLE POSITIONS

摘要

Described herein are a method and system for tracking a position of a borehole for oil and gas drilling. The method includes locating an acoustic transmitter or an acoustic receiver downhole in the borehole; locating the other of the transmitter or the receiver in a known position relative to the surface; transmitting an acoustic signal from the transmitter to the receiver; recording when the signal arrives at the receiver; and determining the position of the transmitter or the receiver located downhole based on when the signal arrives at the receiver and the known position of the transmitter or the receiver. The system includes either an acoustic transmitter or an acoustic receiver located downhole in the borehole, the other of the transmitter or the receiver located in a known position relative to the surface; and a controller configured to determine the position of the transmitter or receiver located downhole based on when a signal transmitted from the transmitter to the receiver arrives at the receiver and based on the known position of the other of the transmitter or the receiver located in the known position.