Neutron density integrated instrument

A density and neutron technology, applied in the field of neutron density integrated instruments, can solve the problems of inability to guarantee the continuity and accuracy of data acquisition, increase program complexity, increase power consumption, etc., to reduce complexity, reduce settings, The effect of reducing the operating load

Active Publication Date: 2019-02-19
CNPC GREATWALL DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Conventional neutron and density meters are equipped with three measurement tool surfaces, which will increase power consumption and cost during the working process of the instrument, and the sampling data will be interrupted during the data transmission process, which cannot guarantee the continuity of data collection performance and accuracy, correspondingly increasing program complexity

Method used

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Embodiment 1

[0031] according to figure 1 , figure 2 As shown, the present invention discloses a neutron density integrated instrument, including a pressure-resistant tube 1, a neutron sub-section 2, an ultrasonic ranging sub-section 3, a density sub-section 4 and a synchronous pulse device 5, the neutron short Section 2, ultrasonic distance measuring short joint 3 and density short joint 4 are connected in sequence, and are set inside the pressure-resistant pipe 1; the synchronous pulse device 5 is set inside the density short joint; the neutron short joint 2 Including a neutron processor 21 for measuring formation porosity data; the ultrasonic distance measuring sub 3 includes an ultrasonic processor 31 for measuring the distance from the measuring instrument to the well wall; the density sub 4 includes a density processor 41. Acceleration sensor 42, the density processor 41 is used to measure formation density and photoelectric coefficient, and the acceleration sensor 42 is used to de...

Embodiment 2

[0035] according to figure 1 , figure 2 As shown, the present invention discloses a neutron density integrated instrument, including a pressure-resistant tube 1, a neutron sub-section 2, an ultrasonic ranging sub-section 3, a density sub-section 4 and a synchronous pulse device 5, the neutron short Section 2, ultrasonic distance measuring short joint 3 and density short joint 4 are connected in sequence, and are set inside the pressure-resistant pipe 1; the synchronous pulse device 5 is set inside the density short joint; the neutron short joint 2 Including a neutron processor 21 for measuring formation porosity data; the ultrasonic distance measuring sub 3 includes an ultrasonic processor 31 for measuring the distance from the measuring instrument to the well wall; the density sub 4 includes a density processor 41. Acceleration sensor 42, the density processor 41 is used to measure formation density and photoelectric coefficient, and the acceleration sensor 42 is used to dete...

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Abstract

The invention discloses a neutron density integrated instrument, which comprises a pressure-resisting tube, a neutron pup joint, an ultrasonic ranging pup joint, a density pup joint and a synchronouspulse device. The neutron pup joint, ultrasonic ranging pup joint and the density pup joint are arranged inside the pressure-resisting tube; the neutron pup joint comprises a neutron processor, and used for measuring formation porosity data; the ultrasonic ranging pup joint includes an ultrasonic processor, and used for measuring the distance from a measuring instrument to a borehole wall; the density pup joint includes a density processor and an acceleration sensor, the density processor is used for measuring the formation density and a photoelectric coefficient, and the acceleration sensor is used for sectioning on the tool face and determining the position pointed by a measuring probe; and the synchronous pulse device comprises a synchronous pulse transmitter and a synchronous pulse line, and the synchronous pulse transmitter is used for transmittinga synchronous clock signal with fixed frequency f. According to the neutron density integrated instrument, the processor load can be reduced, quick responseto interrupt is not required, implementation is ensured, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a neutron density integrated instrument. Background technique [0002] The new logging-while-drilling technology embodies the purpose of producing oil and gas at the lowest cost. In order to evaluate the formation more accurately, the directional technology in the drilling process is produced. Today's petroleum industry's requirements for measurement accuracy and reliability make the application field of LWD technology continuously expand, and LWD technology pushes drilling to a higher level. In view of the fact that most oilfields in my country are in the middle and late stages of development and are developing thin beds and small fault block oil and gas reservoirs, LWD technology can provide the main technical means for real-time geosteering and formation evaluation. [0003] Complex lithologic strata are an important exploration field of oil and gas in my country, and the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/14E21B47/00
CPCE21B47/00E21B47/14
Inventor 刘乃震卢毓周朱忠伟沙峰杨超登郭永恒李勇孔建敏
Owner CNPC GREATWALL DRILLING ENG
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