Directional gamma logging-while-drilling tool

A logging-while-drilling tool and directional technology, applied in construction and other directions, can solve problems such as inability to effectively guide drilling, inability to determine the true orientation of the drilling trajectory, and inability to determine horizons in a timely and effective manner

Inactive Publication Date: 2012-06-27
SCHLUMBERGER JHP OILFIELD TECH SHANDONGCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the gamma measurement sub-joint equipped for the measurement while drilling is not directional, so it cannot determine the horizon in time and effectively. In real-time measurement, especially for horizontal wells, it is impossible to judge that the drilling trajectory is in the real position of the oil layer, resulting in the inability to Effectively guide drilling

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  • Directional gamma logging-while-drilling tool

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Embodiment Construction

[0015] Describe the implementation process of the patent of the present invention in detail below in conjunction with accompanying drawing.

[0016] The directional gamma logging while drilling tool includes surface information processing system, MWD downhole inclination measuring system, and directional gamma measurement system; the surface information processing system includes signal demodulation surface processing box, well depth tracking measuring instrument, surface information processing software, Special graphics drawing software; MWD downhole inclinometer system includes mud signal pulser 1, driver device 2, inclinometer nipple 4, inclinometer battery cylinder 3; directional gamma measurement system includes gamma special battery cylinder 5, directional Gamma measurement subsection 6. The directional gamma measurement system is installed at the bottom of the MWD downhole inclinometer system, the inclinometer sub 4 is connected to the gamma special battery cylinder 5, ...

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Abstract

The invention provides a directional gamma logging-while-drilling tool. A surface information processing system comprises a signal demodulation surface processing box, a well depth tracking measurer, surface information processing software and special graphics drawing software. A MWD (measurement while drilling) system comprises a mud signal pulser, a drive device, an inclinometry sub and an inclinometry battery tube. A directional gamma measurement system mainly comprises a special gamma battery tube and a directional gamma measurement sub. The directional gamma logging-while-drilling tool has the advantages that conventional wired measurement-while-drilling technical services can be performed; the tool with a gamma imaging function is capable of recognizing stratum information change, especially interfaces of stratums; the unit measurement sub can be hooked randomly according to function requirements; the directional gamma measurement function in high-speed rotation can be implemented; and the tool has a unique mechanical damping design.

Description

technical field [0001] The patent of the invention relates to a geosteering tool for real-time analysis of wellbore trajectory of oil and gas wells, which belongs to the technical service field of drilling engineering in oil and gas exploration and development. Background technique [0002] Oil measurement while drilling technology has been promoted in China. With the needs of mining, engineers and technicians are required to understand the changes of wellbore trajectory and formation information in a timely manner, and adjust their posture in a timely manner, especially for identifying thin oil layers and improving drilling efficiency, which is of great significance. How to effectively identify formation changes in the thin oil layer production process becomes particularly important. [0003] At present, the gamma parameters measured by the wireless inclinometer while drilling used in the directional well drilling process of the petroleum industry use a gamma ray scintillat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/0224E21B47/20E21B47/002
Inventor 顾鹏柏险峰付翠玲
Owner SCHLUMBERGER JHP OILFIELD TECH SHANDONGCO
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