An apparatus for measuring characteristics of earth formations surrounding a borehole, comprises a resistivity measurement device having a multiplicity of antennae spaced between each other in a longitudinal direction of the apparatus. A neutron measurement device of the apparatus comprises at least a neutron source and at least a neutron detector, each of the neutron detectors being at a distance from the neutron source in the longitudinal direction of the apparatus. The multiplicity of antennae are interleaved with the neutron measurement device in order to reduce a total length of the apparatus and in order to allow a determined area of the earth formation to be measured simultaneously using the neutron measurement device and the resistivity measurement device.
申请公布号
CA2534304(C)
申请公布日期
2013.02.19
申请号
CA20042534304
申请日期
2004.08.02
申请人
SCHLUMBERGER CANADA LIMITED
发明人
SMITS, JAN WOUTER;STOLLER, CHRISTIAN;EVANS, MICHAEL;FISSELER, PATRICK;ADOLPH, ROBERT