Compensated Neutron (GCN) Price in Bangladesh

Compensated Neutron (GCN)

The Compensated Neutron module provides an environmentally compensated porosity log in mud-filled open holes. An alternative epithermal detector configuration is available for air/gas filled holes. The tool design has been optimised to provide good performance at acceptable logging speeds while still using a relatively small 92GBq 241Am-Be source. It is combinable with the Litho-Density and Dual Induction log in a single run. Principle of Measurement: The Compensated Neutron measurement uses two 3 He proportional detectors and a side-door entry sealed neutron source. Fast neutrons emitted by the source are scattered and slowed down by light elements (principally hydrogen) in the formation. The ratio of the neutron flux reaching the detectors depends on the formation hydrogen index/formation porosity. Neutron porosity measurements are affected by the borehole environment. These effects are compensated in software by algorithms calculated by Monte Carlo modelling and benchmarked to standards at the Callisto facility in Leicestershire, UK.

SPECIFICATION: The Compensated Neutron module provides an environmentally compensated porosity log in mud-filled open holes. An alternative epithermal detector configuration is available for air/gas filled holes. The tool design has been optimised to provide good performance at acceptable logging speeds while still using a relatively small 92GBq 241Am-Be source. It is combinable with the Litho-Density and Dual Induction log in a single run. Principle of Measurement: The Compensated Neutron measurement uses two 3 He proportional detectors and a side-door entry sealed neutron source. Fast neutrons emitted by the source are scattered and slowed down by light elements (principally hydrogen) in the formation. The ratio of the neutron flux reaching the detectors depends on the formation hydrogen index/formation porosity. Neutron porosity measurements are affected by the borehole environment. These effects are compensated in software by algorithms calculated by Monte Carlo modelling and benchmarked to standards at the Callisto facility in Leicestershire, UK. Example of logging data Compensated Neutron Module Source 2.27m (89.4”) SSN LSN Features Well characterised tool response based on computer calculations for limestone, sandstone and dolomite Fully digital telemetry combines with density, induction and other logging probes Low-activity source requirements for safe handling and cost reduction High-resolution measurement Maximum data sampling rate is 1cm (0.4”) Measurements Porosity ɸ Ratio long/short and raw counts Applications Porosity Lithology (in conjunction with other logs) Gas/light hydrocarbon detection Correlation between wells Operating Conditions Borehole type: fluid filled Ø:102mm (4") to 305mm (12") Specifications Diameter: 63mm (2.5”) Length: 2.27m (89.4”) Weight: 28kg (62lb) Max. temperature: 125°C Max. pressure: 86MPa (12,500psi) 3 He detectors offsets: 203 mm (8”) and 406 mm (16”) Porosity Range: -15% to 60% (limestone scale) Resolution: 0.6 PU in 152 mm (6”) borehole at 15% porosity Radius of investigation: 152 mm (6”) – 406 mm (16”) Part Numbers I003942 Compensated Neutron module Accessories: I013962 92 GBq 241Am-Be source I004124 Source holder I004122 Source transport pig I004123 Source handling tool set I004137 Field check jig I017411 Dual-band eccentraliser for neutron/telemetry.

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Steven Rich – Sep 17, 2016:

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William Cobus – Aug 21, 2016:

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