Patent ID: 11940590
Assignee: CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Field: Measurement (Instruments)
Classification: CPC G  E  Y | IPC E  G

Claim 9:
10. A fast forward system for gamma-ray logging of highly-deviated and horizontal wells, wherein fast forward for gamma-ray logging of highly-deviated and horizontal wells is performed by using the fast forward method for gamma-ray logging of highly-deviated and horizontal wells according to claim 1, and the system comprises the following modules:
a logging condition determination module, configured to determine intersection situations of a logging record point and a formation boundary, and determine whether a logged well is a straight well or a deviated well;
a gamma-ray equivalent longitudinal coefficient determination module under the condition of the straight well, configured to, based on an effective detection space of a gamma detector, in the effective detection space, obtain one-dimensional longitudinal equivalent contribution coefficients (varying with distances between formations and the detector) of the formations at different distance from the detector to a gamma-ray flux received by detector under the condition of the straight well;
a conversion module for integrals of gamma-ray fluxes, configured to convert an integral of the gamma-ray flux received by the detector under the condition of the deviated well into an equivalent integral of a gamma-ray under the condition of the straight well; and
a forward module, configured to calculate a forward value of each measurement point.