Baker Hughes Corporation

Stephen Riley

Darryl E Trcka

David M Chace

Benoit J Guivarch

David M Chase

An apparatus for detecting gamma ray (GR) radiation having a plurality of detector cells arranged in an array is disclosed. Each cell includes a housing having an aperture, the housing comprising a GR absorbing material, and a GR detector disposed within the housing such that external gamma rays are received at the GR detector via the aperture. The apertures of each cell are aligned.

Apparatus and method for detecting gamma ray radiation

A method, apparatus, and machine-readable medium for evaluating an earth formation having a fluid mixture including oil and water therein. The earth formation is irradiated with a source and radiation resulting from interaction of the radiation with nuclei is measured at at least two detectors. A fluid zone parameter (FZP) indicative of oil saturation is determined and values of the FZP are established for at least two different values of oil saturation. A value of the oil saturation is estimated using the determined value of the FZP and established values of the FZP. The process may be repeated at a plurality of depths and the determined value of the FZP is displayed at the plurality of depths.

Measurement of water-oil saturation using pulsed neutron instrumentation

Measurements made with a pulsed neutron source and three or more gamma ray detectors are used to estimate the silicon and oxygen content of earth formations.

Method and apparatus for determining silicon content of the earth formations in cased well bores

A pulsed neutron source irradiates an earth formation. The irradiation produces Nfrom Oin a fluid in the borehole, and the gamma rays produced by the subsequent decay of Nare detected by a plurality of spaced apart detectors. The count rates of the detectors are accumulated over a time sampling interval to produce temporal signals. Processing of the temporal signals using correlation, differentiation and/or semblance techniques is used for determination of the flow velocity of one or more fluids in the borehole.

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Spring, TX, United States of America

Stephen Riley