CN202090912U - Azimuth gamma well measurer - Google Patents

Azimuth gamma well measurer Download PDF

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Publication number
CN202090912U
CN202090912U CN2011201911437U CN201120191143U CN202090912U CN 202090912 U CN202090912 U CN 202090912U CN 2011201911437 U CN2011201911437 U CN 2011201911437U CN 201120191143 U CN201120191143 U CN 201120191143U CN 202090912 U CN202090912 U CN 202090912U
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CN
China
Prior art keywords
gamma
processing unit
orientation
detector
gamma detector
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Expired - Lifetime
Application number
CN2011201911437U
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Chinese (zh)
Inventor
刘海
冯泽东
孙连奎
潘光玮
卜纲
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GOALTECH CO Ltd
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GOALTECH CO Ltd
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Publication date
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Priority to CN2011201911437U priority Critical patent/CN202090912U/en
Application granted granted Critical
Publication of CN202090912U publication Critical patent/CN202090912U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

Embodiments of the utility model disclose an azimuth gamma well measurer, comprising a gravity accelerometer and a gamma detector, wherein the periphery of the gamma detector comprises a shielding layer, and the shielding layer shields a part of the gamma detector, so that only incident gamma rays in partial directions are detected; and the setting direction of the gravity accelerometer is accordant with the detecting direction of the gamma detector. The measurer can be used for measuring the gamma value of each azimuth, so that the specific position of an apparatus during drilling departed from the boundary of the upper stratum and the lower stratum can be timely judged, therefore, the apparatus during drilling always drills in a reservoir stratum, and the drilling rate is greatly improved.

Description

Orientation gamma logging device
Technical field
The utility model relates to well logging during systems technology field, relates in particular to a kind of orientation gamma logging device.
Background technology
At present, in the well logging during system, measuring gamma orientation and parameter in real time is very important, gamma value by the last gamma of continuous measurement down-hole equipment, following gamma and all directions, for example 360 degree are divided into 8 districts, measure the gamma value in each district, help judge with boring instrument stratum of living in, and monitor the situation of change on stratum at any time according to orientation gamma real time data, to whether getting target zone and can make rapidly and accurately and judging with boring instrument.
But in the prior art scheme, though natural gamma measuring apparatus energy measurement gamma, but can not accurately judge the direction of gamma, by the gamma ray log curve, Substance Properties and data in the stratum that can determine to exist, but can't be accurate to the formation variation situation of which direction, just can't judge and discern for the character of bad ground like this.
Summary of the invention
The purpose of this utility model provides a kind of orientation gamma logging device, can measure the gamma value in each orientation, thereby in time judge with boring the instrument distance particular location of stratigraphic boundary up and down, make with boring instrument to keep creeping in the reservoir always, increase substantially the brill encountering rate.
The purpose of this utility model is achieved through the following technical solutions:
A kind of orientation gamma logging device, described device comprises acceleration of gravity meter and gamma detector, wherein:
Comprise barrier bed around the described gamma detector, this barrier bed blocks the part of gamma detector, makes to have only the incident gamma rays of part direction to be detected;
The placement direction of described acceleration of gravity meter and the detection direction of gamma detector are consistent.
Described device also comprises first amplifier, second amplifier, counter, D/A, signal processing unit and CPU processing unit, wherein:
Described first amplifier is connected with described gamma detector, and is connected with described counter;
Described counter is connected with described CPU processing unit;
Described second amplifier is connected with described acceleration of gravity meter, and is connected with described D/A;
Described D/A is connected with described signal processing unit, and this signal processing unit is connected with described CPU processing unit.
The technical scheme that is provided by above-mentioned the utility model as can be seen, described device comprises acceleration of gravity meter and gamma detector, comprise barrier bed around the described gamma detector, this barrier bed blocks the part of gamma detector, makes to have only the incident gamma rays of part direction to be detected; The placement direction of described acceleration of gravity meter and the detection direction of gamma detector are consistent.This device can be measured the gamma value in each orientation, thereby in time judges with boring the instrument distance particular location of stratigraphic boundary up and down, makes with boring instrument to keep creeping in the reservoir always, increases substantially the brill encountering rate.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The electrical block diagram of the orientation gamma logging device that Fig. 1 is provided for the utility model embodiment.
The frame for movement schematic diagram of the orientation gamma logging device that Fig. 2 is provided for the utility model embodiment.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills belong to protection domain of the present utility model not making the every other embodiment that is obtained under the creative work prerequisite.
The orientation gamma is meant drilling tool in drilling process, and the measurement by the gamma detector directionality keeps drilling tool to creep in the well track of regulation, and the direction that control is crept into makes it not pass target coal seam or oil and gas reservoir border in drilling process.The utility model embodiment measures the gamma value of different directions by blocking described gamma detector, and utilizes described acceleration of gravity meter to determine the detection direction of described gamma detector, realizes surveying the natural gamma value in each orientation in the stratum.
Below in conjunction with accompanying drawing the utility model embodiment is described in further detail; be illustrated in figure 1 as the electronic structure schematic diagram of the orientation gamma logging device that the utility model embodiment provided; be illustrated in figure 2 as the frame for movement schematic diagram of this use new embodiment; among Fig. 2: 1 is last end interface; 2 is outer protection tube, and 3 is circuit board, and 4 is the gravity accelerometer; 5 is gamma detector, and 6 is barrier bed.Wherein:
Comprise barrier bed around the described gamma detector, this barrier bed blocks the part of gamma detector, making has only the incident gamma rays of part direction to be detected, specifically: because barrier bed is partly eliminated the gamma rays of incident, only the incident gamma rays of part direction can be detected, and just can realize that therefore the gamma of directionality is surveyed.
The placement direction of described acceleration of gravity meter and the detection direction of gamma detector are consistent, specifically: determine the position of this acceleration of gravity meter by the output that detects the acceleration of gravity meter, thereby determine the detection direction of described gamma detector.
In addition, as shown in Figure 1, described device also comprises first amplifier (amplifier 1 among Fig. 1), second amplifier (amplifier 2 among Fig. 1), counter, D/A (A/D) converter, signal processing unit and CPU processing unit, wherein:
Described first amplifier is connected with described gamma detector, and is connected with described counter; Described counter is connected with described CPU processing unit; Described second amplifier is connected with described acceleration of gravity meter, and is connected with described D/A; Described D/A is connected with described signal processing unit, and this signal processing unit is connected with described CPU processing unit.
The course of work of each several part is among above-mentioned Fig. 1:
Described first amplifier receives the output signal of described gamma detector and signal is amplified, and outputs to described counter then;
Described counter is by realizing the measurement of gamma value to the counting of described first amplifier output signal;
Described second amplifier receives the output signal of described acceleration of gravity meter and signal is amplified, and outputs to described D/A then;
Described D/A is realized the conversion of described acceleration of gravity meter signal imitation amount to digital quantity;
Described signal processing unit reads the digital quantity after the conversion, and calculates the positional information of described acceleration of gravity meter;
Described CPU processing unit reads the gamma value data of described counter and the acceleration of gravity meter positional information of signal processing unit in real time, judge the orientation of current gamma value data, thereby determine the detection direction of described gamma detector, and upload storage gamma data.
In addition, when rotated, this orientation gamma logging device can real time record gamma detection direction and gamma detection data, can realize the detection of each orientation gamma by continuing gyrobearing gamma logging device.
In the specific implementation process, gamma detector has two kinds of models to wait to select, and first kind is 1 inch diameter gamma detector; Second kind is the gamma detector of 0.75 inch diameter.Select which kind of model to decide according to the actual requirements.
In addition, the calibration process of orientation gamma logging device is:
Orientation gamma logging device is put in the non magnetic drill collar, under noiseless environment, the count value of test orientation gamma; Then the gamma graduator is placed into the position that is positioned at this orientation gamma logging device on the non magnetic drill collar, the count value of test orientation gamma.The count value that obtains for twice is carried out computing, draw the K value that gamma is demarcated, the calculating of direction gamma API (American Petro Institute, American Petroleum Institute) when this K value is used for measurement while drilling.
After obtaining demarcating the K value, the gamma value of orientation gamma-spectrometry can correctly be converted to the API value, and the numerical value of orientation gamma-spectrometry can be measured numerical value with other logging tools and do contrast verification like this, convenient further comparatively validate.
In sum, the described orientation of the utility model embodiment gamma logging device is applicable to oil gas well and coal bed gas well, particularly the coal bed gas for complicated structure is very effective, particularly suitable in high-inclination directional well and horizontal well drilling, orientation gamma logging device is used for the horizontal well of orientation or geosteering, can in time judge the instrument distance particular location of stratigraphic boundary up and down, make drilling tool keep creeping in the reservoir always, utilize this instrument can improve the brill encountering rate significantly.
The above; it only is the preferable specific embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.

Claims (2)

1. an orientation gamma logging device is characterized in that described device comprises acceleration of gravity meter and gamma detector, wherein:
Comprise barrier bed around the described gamma detector, this barrier bed blocks the part of gamma detector, makes to have only the incident gamma rays of part direction to be detected;
The placement direction of described acceleration of gravity meter and the detection direction of gamma detector are consistent.
2. orientation as claimed in claim 1 gamma logging device is characterized in that described device also comprises first amplifier, second amplifier, counter, D/A, signal processing unit and CPU processing unit, wherein:
Described first amplifier is connected with described gamma detector, and is connected with described counter;
Described counter is connected with described CPU processing unit;
Described second amplifier is connected with described acceleration of gravity meter, and is connected with described D/A;
Described D/A is connected with described signal processing unit, and this signal processing unit is connected with described CPU processing unit.
CN2011201911437U 2011-06-08 2011-06-08 Azimuth gamma well measurer Expired - Lifetime CN202090912U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201911437U CN202090912U (en) 2011-06-08 2011-06-08 Azimuth gamma well measurer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201911437U CN202090912U (en) 2011-06-08 2011-06-08 Azimuth gamma well measurer

Publications (1)

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CN202090912U true CN202090912U (en) 2011-12-28

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CN2011201911437U Expired - Lifetime CN202090912U (en) 2011-06-08 2011-06-08 Azimuth gamma well measurer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108625845A (en) * 2017-03-17 2018-10-09 中石化石油工程技术服务有限公司 One kind decoupling scale method and graduation apparatus with orientation gamma is bored

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108625845A (en) * 2017-03-17 2018-10-09 中石化石油工程技术服务有限公司 One kind decoupling scale method and graduation apparatus with orientation gamma is bored
CN108625845B (en) * 2017-03-17 2021-08-24 中石化石油工程技术服务有限公司 While-drilling orientation gamma decoupling calibration method and calibration device

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Granted publication date: 20111228