Method of seismic surveying
First Claim
Patent Images
1. A method of seismic survey comprising:
- actuating a first vibrator group to start a first sweep at time T0; and
actuating a second vibrator group to start a second sweep at time T1, wherein T0<
T1<
T0+S1+L, where S1 is a sweep time of the first vibrator group and L is a listening time;
wherein the time between the first sweep and the second sweep is TI−
T0≧
((n−
1)*f1*S1)/(n*(f1-f0)) where n is a natural number, f0 is the lower frequency limit of the vibrator sweep and f1 is the upper frequency limit of the vibrator sweep.
1 Assignment
0 Petitions
Accused Products
Abstract
A method enables the time required to complete a seismic survey and the noises recorded in the seismic data to be reduced. One aspect of the method includes actuating a first vibrator group to start a first sweep at time T0; and a second vibrator group to start a second sweep at time T1, wherein T0<T1<T0+S1+L, where S1 is a sweep time of the first vibrator group and L is a listening time; wherein the time between the first sweep and the second sweep is T1−T0≧((n−1)*f1*S1)/(n*(f1−f0)) where n is a natural number, f0 is the lower frequency limit of the vibrator sweep and f1 is the upper frequency limit of the vibrator sweep.
82 Citations
23 Claims
-
1. A method of seismic survey comprising:
-
actuating a first vibrator group to start a first sweep at time T0; and actuating a second vibrator group to start a second sweep at time T1, wherein T0<
T1<
T0+S1+L, where S1 is a sweep time of the first vibrator group and L is a listening time;wherein the time between the first sweep and the second sweep is TI−
T0≧
((n−
1)*f1*S1)/(n*(f1-f0)) where n is a natural number, f0 is the lower frequency limit of the vibrator sweep and f1 is the upper frequency limit of the vibrator sweep. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A seismic surveying arrangement comprising:
-
a plurality of vibrators; and a control means adapted to initiate a first sweep of a first vibrator group at time TO and to initiate a second sweep of a second vibrator group at time T1, where T0<
T1<
T0+Si+L where S1 is the sweep time of the first vibrator group and L is the listening time;the control means is further adapted to initiate the first sweep and the second sweep such that TI−
T0≧
((n−
1)*S1*f1)/(n*(f1-f0)), where n is a natural number, f0 is the lower frequency limit of the vibrator sweep and f1 is the upper frequency limit of the vibrator sweep; andat least one of the first vibrator group and the second vibrator group has more than one vibrator. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
Specification