Compensated neutron logging instrument with controllable neutron source and control circuit of same

A technology for neutron compensation and control circuits. It is used in surveying, wellbore/well components, and earth-moving drilling. It can solve problems such as environmental damage, slow data acquisition and processing, and high temperature resistance. The acquisition and processing speed are improved, and the effect of large volume is solved

Pending Publication Date: 2016-05-25
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the radioactive material is uncontrollable, produces radiation regardless of whether the logging tool is required to work, and therefore poses a safety hazard to logging personnel and damages the environment
In addition, the traditional neutron source logging tool also has the following problems, that is, high cost, slow data acquisition and processing speed, and also has defects in high temperature resistance

Method used

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  • Compensated neutron logging instrument with controllable neutron source and control circuit of same
  • Compensated neutron logging instrument with controllable neutron source and control circuit of same
  • Compensated neutron logging instrument with controllable neutron source and control circuit of same

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Experimental program
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Embodiment Construction

[0044] Hereinafter, the present invention will be described in detail with reference to the drawings.

[0045] image 3 It is a structural schematic diagram of the controllable neutron source compensation neutron logging tool of the present invention. Such as image 3 As shown, the controllable neutron source compensated neutron logging tool of the present invention has: a controllable neutron source (ie, a neutron generator) for emitting neutrons; a neutron detector for detecting thermal The number of neutrons; the total power supply board, used to provide the power required by the controllable neutron source to compensate the neutron logging tool; the communication board, used to upload the data to the PC (external computer), that is, to communicate with the PC Communication; pre-amplification circuit board (that is, a pre-amplification circuit is formed on it), used to process the charge signal sent by the neutron detector, and convert it into a measurable voltage signal;...

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PUM

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Abstract

The invention relates to a compensated neutron logging instrument with a controllable neutron source and a control circuit of the same. The control circuit provided by the invention comprises a control unit, a collection unit, a communication unit, a reset circuit and a crystal oscillator, wherein the control unit is used to process communications of a communication plate in the compensated neutron logging instrument with the controllable neutron source and a neutron generator; the collection unit is used to process pulse signals output by a pre-set amplifying circuit of the compensated neutron logging instrument with the controllable neutron source and is used to count and measure quantity of pulses; the communication unit is controlled by the control unit, and communicates with an external computer and a control circuit of the neutron generator so as to adjust various parameters of the neutron generator; the reset circuit is used to reset the collection unit; and the crystal oscillator is used to provide clock signals for the collection circuit.

Description

technical field [0001] The invention relates to a controllable neutron source compensation neutron logging tool used in petroleum logging and a control circuit in the controllable neutron source compensation neutron logging tool. Background technique [0002] Well logging, also known as geophysical well logging or petroleum well logging, referred to as well logging, is a method of measuring geophysical parameters using the electrochemical properties, electrical conductivity, acoustic properties, radioactivity and other geophysical properties of rock formations, which belongs to applied geophysical methods one. In oil drilling, well logging must be carried out after drilling to the design depth, also known as completion electrical logging, to obtain various petroleum geology and engineering technical data, that is, oil layer depth, thickness and other information, as well completion and development of oil fields of the original data. [0003] In addition, nuclear logging ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/12
Inventor 闫俊杰王威裴宇阳
Owner CNPC GREATWALL DRILLING ENG
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