CN106555586B - Continuous natural gamma logging instrument while drilling and logging method thereof - Google Patents
Continuous natural gamma logging instrument while drilling and logging method thereof Download PDFInfo
- Publication number
- CN106555586B CN106555586B CN201510617179.XA CN201510617179A CN106555586B CN 106555586 B CN106555586 B CN 106555586B CN 201510617179 A CN201510617179 A CN 201510617179A CN 106555586 B CN106555586 B CN 106555586B
- Authority
- CN
- China
- Prior art keywords
- rock debris
- natural gamma
- area
- sensor
- gamma
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a continuous natural gamma logging instrument while drilling and a logging method thereof. The natural gamma sensor is used for real-time detection, detection signals are input into the comprehensive logging instrument, correction of late arrival depth and data acquisition processing are carried out, real-time curves and real-time data can be output, reference basis is provided for lithology recognition, stratum comparison and position acquisition work of geological technicians, and exploration timeliness is improved.
Description
Technical Field
The invention relates to a logging instrument and a logging method thereof, in particular to a continuous natural gamma logging instrument while drilling and a logging method thereof.
Background
The existing measurement mode is that logging workers adopt a manual method to measure the natural gamma of the rock debris, the rock debris is manually placed in special measurement equipment to carry out natural gamma radioactive detection, detected data are input into a computer to be processed, and a real-time natural gamma curve reflecting the lithology is formed. The measuring method needs to be carried out packet by packet, the workload is large, the steps are complicated, the measured data have contrast, but due to manual reasons, data lag exists or depth correction is not accurate enough.
A measurement mode is wireless logging while drilling, a sensor is placed at a position close to a drill bit to detect a natural gamma signal of a stratum, the natural gamma signal is transmitted to the ground surface to be processed through a mud pulse signal acquisition and transmission mode, the main function is geological guidance and lithology quick identification, the logging method adopts mud pulse data acquisition and transmission, the influence of working conditions is large, the error rate of transmission signals is high, the cost of equipment while drilling is high, and only key exploratory wells and horizontal wells are adopted, so that the logging method cannot be widely applied.
The other method is that a sensor is placed in a mud trough for measurement, broken rock debris is brought to the ground in the circulation process of mud, the mud enters a vibrating screen through a mud trough channel, the sensor measures natural gamma signals of the rock debris in the mud trough, the content of the rock debris in the mud trough is small, the influence of drilling is large, the numerical value shifting range is small, and the measured data reference is poor;
in another logging method, rock debris is collected through a vibrating screen, the rock debris adopts a compression mode, then natural gamma signals of the rock debris are collected, output and transmission are carried out through network 3G signals, and the process is slightly complicated; the data is output by adopting 3G signals, although the requirements of most wells can be met, the data transmission can not be realized under the condition of poor offshore signals; the data special equipment receives the data, the perfect connection with the comprehensive logging instrument cannot be realized, and certain workload is needed for data depth correction.
Disclosure of Invention
Aiming at the problems that continuous and quantitative acquisition of rock debris can not be realized, connection with a comprehensive logging instrument is not realized, and real-time online detection is carried out in the prior art, the invention provides a continuous natural gamma logging instrument while drilling and a logging method of the continuous natural gamma logging instrument while drilling, which can realize connection with the comprehensive logging instrument to carry out real-time data processing, provide a real and accurate stratum rock debris gamma detection curve for logging technicians, provide reference basis for lithology identification, stratum comparison and horizon acquisition work, and improve exploration timeliness.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a continuous natural gamma logging while drilling tool, comprising:
the rock debris collector is used for continuously collecting rock debris from the vibrating screen in a measuring area inside the vibrating screen, simultaneously keeping the quantity of the rock debris in the measuring area constant, discharging redundant rock debris on the premise of meeting the continuous detection requirement and maintaining the cyclic updating of the rock debris in the measuring area;
the natural gamma sensor penetrates into a measuring area of the rock debris collector and continuously measures natural gamma rays of rock debris in the measuring area, and simultaneously, the measured signal is directly transmitted into the comprehensive logging instrument, the comprehensive logging instrument processes a real-time signal directly transmitted from the natural gamma sensor and outputs a real-time natural gamma logging curve and real-time data by combining with a late depth parameter;
the natural gamma signal acquisition system completes the parameter setting of the comprehensive logging instrument, ensures the automatic acquisition and analysis of the logging instrument, outputs customizable interval depth data, and provides reference basis for lithology identification, stratum comparison and horizon acquisition.
Further, the rock debris collector is divided into an acquisition area, a measurement area and a sand discharge area;
the upper part of the collecting area, which is positioned on the rock debris collector, is arranged to be in a wide mouth shape, and the collecting area is also provided with a sensor supporting device;
the middle part of the measuring area, which is positioned on the rock debris collector, is provided with a through box body, and the lower part of the box body is provided with a fixed seat with a hole;
the sand discharge area is positioned at the lower part of the rock debris collector, and a quadrangular pyramid-shaped cone hopper is arranged below the inner part of the box body;
the outer diameter of the bottom of the cone bucket is larger than the outer diameter of the box body, so that the bottom of the cone bucket is exposed out of the box body, rock debris can be prevented from adhering to the inner wall of the box body, and the cone bucket is prevented from moving up and down.
Furthermore, a bottom plate is arranged below the cone hopper in the sand discharge area;
the bottom plate is provided with a main spring loop bar and an auxiliary spring contact pin, the main spring loop bar and the auxiliary spring contact pin are respectively provided with a main spring and an auxiliary spring, the main spring controls the cone hopper to move up and down, and the auxiliary spring ensures that the cone hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, a main spring sleeve and an auxiliary spring jack which are matched with the main spring sleeve rod and the auxiliary spring contact pin are arranged in the cone hopper, and the main spring sleeve and the auxiliary spring jack ensure that the square cone hopper only vertically moves up and down when the square cone hopper is settled under the action of the gravity of rock debris;
the bottom plate is further provided with a screw rod, the screw rod is arranged in a hole of the box body fixing seat in the measuring area, the screw rod is further provided with an adjusting nut and a fixing nut on the upper side and the lower side of the fixing seat, and the adjusting nut and the fixing nut adjust the elastic force of the spring.
Further, sensor strutting arrangement is including fixed plate, backup pad and hollow ring, the fixed plate sets up in the collection region top, backup pad and hollow ring constitute cylindric structure, and this cylindric structure is connected with the fixed plate, and the one end tip of this cylindric structure stretches into 3/5 position departments in the measurement area to there is as much detritus as possible in guaranteeing nature gamma sensor measuring range.
Further, the upper portion of detritus collector sets up to the wide-mouth inclined plane, and the inclined plane inclination is 60-70, and the adhesion that reduces the surface detritus is helped to big inclination, is close to or stretches into shale shaker sifting surface and goes out the sand position, connects tiny detritus, and the increase connects the sand area.
Further, nature gamma sensor includes sodium iodide crystal, photomultiplier, handles output circuit, supply circuit and alloy shell, inside sodium iodide crystal, photomultiplier and the processing output circuit of having connected gradually of alloy shell, supply circuit sets up inside the alloy shell, receives external power source and for the power supply of each inside components and parts of nature gamma sensor, the sodium iodide crystal is provided with the shock pad, photomultiplier tube socket department is provided with damping spring to strengthen sodium iodide crystal, photomultiplier's anti-seismic performance.
Further, the processing output circuit includes:
the processing module is used for finishing gamma counting and sending the gamma counting to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
and the current signal conversion circuit is used for sending the converted gamma signals to the comprehensive logging instrument.
Furthermore, the processing output circuit is also provided with an anti-interference protective tube, and the power supply circuit is also provided with a high-voltage module for generating high voltage required by the processing output circuit.
Furthermore, the alloy shell is made of a shielding material which effectively avoids external interference.
Furthermore, the comprehensive logging instrument provides an external power supply for the natural gamma sensor, and the natural gamma sensor selects a hydrogen sulfide channel of the comprehensive logging instrument to be connected.
The invention also provides a logging method of the continuous natural gamma logging while drilling instrument, which comprises the following steps:
1) the rock debris collector is arranged below the vibrating screen and is divided into an acquisition area, a measurement area and a sand discharge area, wherein the acquisition area is positioned at the upper part of the rock debris collector and is arranged in a wide-mouth shape, the measurement area is positioned at the middle part of the rock debris collector and is arranged in a vertically through box body, the lower part of the box body is provided with a fixed seat with holes, the sand discharge area is positioned at the lower part of the rock debris collector, and a quadrangular pyramid-shaped cone hopper is arranged below the inner part of the box body;
the outer diameter of the bottom of the cone hopper is larger than that of the box body, so that the bottom of the cone hopper is exposed out of the box body, and rock debris can be prevented from adhering to the inner wall of the box body and blocking the up-and-down movement of the cone hopper;
the upper part of the rock debris collector is specifically provided with a wide-mouth inclined plane, the inclination of the inclined plane is 60-70 degrees, the large inclination is beneficial to reducing the adhesion of rock debris on the surface, and the rock debris collector is close to or extends into a sand outlet position of the screen surface of the vibrating screen, so that fine rock debris is received, and the rock debris receiving area is increased;
a bottom plate is arranged below the cone hopper in the sand discharge area;
the bottom plate is provided with a main spring loop bar and an auxiliary spring contact pin, the main spring loop bar and the auxiliary spring contact pin are respectively provided with a main spring and an auxiliary spring, the main spring controls the cone hopper to move up and down, and the auxiliary spring ensures that the cone hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, a main spring sleeve and an auxiliary spring jack which are matched with the main spring sleeve rod and the auxiliary spring contact pin are arranged in the cone hopper, and the main spring sleeve and the auxiliary spring jack ensure that the square cone hopper only vertically moves up and down when the square cone hopper is settled under the action of the gravity of rock debris;
the bottom plate is also provided with a screw rod, the screw rod is arranged in a hole of a box body fixing seat in the measuring area, the screw rod is also provided with an adjusting nut and a fixing nut on the upper side and the lower side of the fixing seat, and the adjusting nut and the fixing nut adjust the elastic force of the spring;
2) arranging a sensor supporting device in the acquisition area to place a natural gamma sensor;
the sensor supporting device comprises a fixing plate, a supporting plate and a hollow ring, wherein the fixing plate is arranged above the acquisition area, the supporting plate and the hollow ring form a cylindrical structure, the cylindrical structure is connected with the fixing plate, and one end part of the cylindrical structure extends into the 3/5 position of the measurement area so as to ensure that the natural gamma sensor has rock debris as much as possible within the measurement range;
3) the natural gamma sensor is detachably arranged in the sensor supporting device, so that the continuous measurement of natural gamma signals of the rock debris is ensured;
the natural gamma sensor comprises a sodium iodide crystal, a photomultiplier, a processing output circuit, a power supply circuit and an alloy shell, wherein the sodium iodide crystal, the photomultiplier and the processing output circuit are sequentially connected inside the alloy shell, the power supply circuit is arranged inside the alloy shell, receives an external power supply and supplies power to all components inside the natural gamma sensor, the sodium iodide crystal is provided with a shock pad, and a shock absorption spring is arranged at the tube seat of the photomultiplier to enhance the anti-seismic performance of the sodium iodide crystal and the photomultiplier;
the processing output circuit includes:
the processing module is used for finishing gamma counting and sending the gamma counting to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
the current signal conversion circuit is used for sending the converted gamma signals to the comprehensive logging instrument;
the processing output circuit is also provided with an anti-interference protective tube;
the power supply circuit is also provided with a high-voltage module for generating high voltage required by the processing output circuit;
the alloy shell is made of a shielding material which can effectively avoid external interference, and the alloy shell meets the requirements of field use through sealing and high-temperature tests;
4) gamma rays in the environment enter a sodium iodide crystal to generate photons, the photons are coupled to a photomultiplier to generate electrons, the electrons are accelerated and amplified by the photomultiplier to form a negative pulse voltage signal, the signal is sent to a processing output circuit in a natural gamma sensor, the processing output circuit directly sends the processed gamma signal to a comprehensive logging instrument, and the natural gamma sensor selects a hydrogen sulfide channel of the comprehensive logging instrument to be accessed;
5) the comprehensive logging instrument receives real-time gamma signals directly transmitted by the natural gamma sensor and outputs real-time natural gamma logging curves and real-time data by combining with the late depth parameters; the comprehensive logging instrument provides an external power supply for the natural gamma sensor;
6) the method comprises the steps of designing special natural gamma signal acquisition software, installing the software in a comprehensive logging instrument acquisition machine to complete parameter setting of the comprehensive logging instrument, ensuring automatic acquisition and analysis of the logging instrument, outputting customizable interval depth data, and providing reference basis for lithology identification, stratum comparison and horizon acquisition.
Has the advantages that:
the logging instrument is provided with a rock debris collector, which can realize continuous and quantitative acquisition of rock debris, a natural gamma sensor is detachably arranged in the rock debris collector to facilitate position adjustment, and the natural gamma sensor is directly connected with the comprehensive logging instrument to realize real-time online data processing;
the continuous measurement while drilling of the invention realizes the continuous measurement of the underground rock debris, can know the geological logging condition in time during drilling, provides real and accurate stratum rock debris gamma real-time data and curves for logging technicians, provides reference basis for lithology identification, stratum comparison and horizon acquisition work, improves exploration timeliness, more accurately predicts coring horizon, buried hill interface and drilling completion depth, and avoids the occurrence of underground accidents.
Compared with common logging-while-drilling equipment, the device has the characteristics of simple structure, low cost, direct online use of the conventional mainstream comprehensive logging instrument and strong field practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an exploded view of the rock debris collector of the present invention.
Fig. 3 is an assembly schematic diagram of the rock debris collector of the present invention.
Fig. 4 is a perspective view of the rock debris collector of the present invention.
Fig. 5 is a bottom view of the cone of the rock debris collector of the invention.
FIG. 6 is a schematic structural view of a sensor support device of the rock debris collector of the present invention.
FIG. 7 is a schematic structural diagram of a natural gamma sensor according to the present invention.
In the figure: 1. the rock debris collector comprises a rock debris collector collecting area, 2 a rock debris collector measuring area, 3 a regulating nut, 4 a fixed seat, 5 a fixed nut, 6 a cone bucket, 7 a main spring sleeve, 8 a secondary spring jack, 9 a main spring, 10 a secondary spring, 11 a main spring loop bar, 12 a secondary spring contact pin, 13 a screw rod, 14 a bottom plate, 15 a sensor supporting device, 16 a hollow ring, 17 a supporting plate, 18 a fixed plate, 19 a sodium iodide crystal and a photomultiplier, 20 a metal alloy shell, 21 a processing output circuit, 22 a power supply and a signal interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1-7, the continuous natural gamma logging while drilling apparatus mainly comprises a rock debris collector, a natural gamma sensor, an access comprehensive logging apparatus and natural gamma signal acquisition software, wherein the rock debris collector is designed according to the field well logging condition and the project design requirements, so that the functions of quantitative continuous collection and automatic updating of rock debris are realized, and the purpose of continuously measuring the underground rock debris by the natural gamma sensor is achieved.
The rock debris collector mainly structurally comprises a box body, a cone bucket, a bottom plate, a main spring/auxiliary spring and the like, and is used for continuously and uninterruptedly collecting rock debris from a vibrating screen in a measuring area inside the vibrating screen, keeping the quantity of the rock debris in the measuring area constant, discharging redundant rock debris on the premise of meeting the continuous detection requirement, and maintaining the circular updating of the rock debris in the measuring area.
The rock debris collector is divided into 3 areas including a collecting area, a measuring area and a sand discharging area,
wherein, the upper portion that the collection area is located the detritus collector sets up to the wide-mouthed form, specifically is the design of wide-mouthed inclined plane, and firstly the increase connects the sand area, and secondly the detritus collector is placed in double-deck shale shaker below, designs to be that the wide-mouthed inclined plane can be close to or stretch into two layers of sifter sand positions, connects tiny detritus. The slope of the slope is about 60-70 degrees, and the large slope helps the slope not to adhere rock debris;
still install sensor strutting arrangement in collection area top edge, natural gamma sensor places in this strutting arrangement, dismouting at will, this sensor strutting arrangement is with a fixed plate, two backup pads and three cavity ring welding form, the fixed plate is fixed at collection area wide-mouth edge, backup pad and cavity ring constitution cylindric structure, this cylindric structure and fixed plate welded fastening, and hollow ring makes the detritus be difficult for staying in the backup pad, the fixed plate leans on screw and box to be connected, sensor strutting arrangement directly stretches into the box and measures regional part down, 3/5 positions from top to bottom at measurement area, have as much detritus as possible in order to guarantee gamma probe measuring range.
The middle part of the measurement area, which is positioned on the rock debris collector, is provided with a box body which is through from top to bottom, rock debris is mainly gathered at the middle part, and the lower part of the outer side of the box body is symmetrically welded with 4-6 fixed seats with holes, and the fixed seats are used for inserting and adjusting screws fixed with the bottom plate;
the region of arranging sand is located the lower part of detritus collector, and the inside below of box is equipped with the awl fill of quadrangular pyramid shape in this region, and awl fill bottom external diameter is greater than the box external diameter to make the awl fill bottom expose the box, can prevent box inner wall adhesion detritus, produce the hindrance to the upper and lower activity that the awl was fought, also can be used as the drainage.
A bottom plate is arranged below the cone hopper in the sand discharge area; a main spring loop bar is welded at the center of the bottom plate, 4 auxiliary spring contact pins are also welded at four corners of the conical hopper corresponding to the periphery of the bottom plate, a main spring and an auxiliary spring are respectively arranged on the main spring loop bar and the auxiliary spring contact pins, the main spring controls the conical hopper to move up and down, and the auxiliary spring ensures that the conical hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, be provided with main spring sleeve and the auxiliary spring jack that matches with main spring loop bar and auxiliary spring contact pin in the awl fill inside, the auxiliary spring jack is the hole that bores the suitable auxiliary spring contact pin size of getting on the inside horizontal baffle of awl fill, the main spring is settled on main spring loop bar and is located main spring sleeve, the auxiliary spring is settled on the auxiliary spring contact pin and is pushed up at auxiliary spring jack downside, main spring sleeve and auxiliary spring jack guarantee that the cubic awl fill is when subsiding under the detritus action of gravity, only do vertical motion from top to bottom.
4-6 screw rods are fixed on the bottom plate corresponding to the positions of the fixing seats with the holes, the screw rods are inserted into the holes of the fixing seats of the box body in the measuring area, adjusting nuts and fixing nuts are screwed on the upper side and the lower side of the fixing seats on the screw rods, and the elastic force of the springs is adjusted through the adjusting nuts and the fixing nuts.
The rock debris collector is placed at the position where sand is discharged most below the vibrating screen, along with the increase of rock debris, the weight overcomes the elastic force of the spring, the cone sinks, the space between the cone and the box body is opened, and under the condition that the rock debris in the box body is kept quantitative, redundant rock debris is discharged.
The natural gamma sensor mainly comprises a sodium iodide crystal, a photomultiplier, a processing output circuit, a power supply circuit and an alloy shell, wherein the sodium iodide crystal, the photomultiplier and the processing output circuit are sequentially connected inside the alloy shell;
the external power supply is provided by the comprehensive logging instrument, the power supply voltage is 24V constant voltage, the power supply circuit realizes the generation of +15V, +5V, 2.5V and high voltage for the power supply of the natural gamma sensor according to the circuit design requirement, the power supply circuit is also provided with a high-voltage module, the high-voltage module provides high voltage, gamma rays in the environment enter the sodium iodide crystal to generate photons, the photons are coupled to the photomultiplier to generate electrons, the electrons are accelerated and amplified by the photomultiplier to form a negative pulse voltage signal, and the signal is sent to the processing output circuit. The processing output circuit includes:
the processing module is used for finishing gamma counting processing by the singlechip and sending the gamma counting processing to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
and the current signal conversion circuit is coupled with the current signal and sends the converted gamma signal to the comprehensive logging instrument.
The logging instrument of the invention is led out three lines, a ground wire, a power supply line and a signal line, wherein the power supply line is provided with 24V voltage by the comprehensive logging instrument, the signal line is connected with the logging instrument, and the comprehensive logging instrument collects current and voltage standard signals. The invention relates to a rock debris natural gamma sensor which is used for ground instruments to perform anti-seismic performance treatment, sodium iodide crystals and a photomultiplier tube are correspondingly protected, the tail part of the crystal is provided with a shock absorption pad, the front end of a tube seat of the photomultiplier tube is provided with a shock absorption spring, an anti-interference protective tube is arranged at a treatment output circuit part, and the rock debris natural gamma sensor is manufactured.
At present, the mainstream instruments of the comprehensive logging instrument in the market are S L-A L S2.2, SK-A L S2.2, SK-CMS, S L-ADVANTAGE, SRP2000, S L-EXP L ORER and the like, input signals of sensor parameters are 4-20mA current signals and 2-10V voltage signals, the parameter types include late arrival parameters and real-time parameters, rock debris belongs to the late arrival depth type, therefore, the late arrival parameters need to be accessed, except for hydrogen sulfide, an isolation grid is additionally arranged for protecting a rear stage circuit, the maximum allowable current of the isolation grid is 80mA, a natural gamma sensor is improved and designed according to the comprehensive logging instrument, the working current and the signal current are superposed, the current exceeds 80mA, the hydrogen sulfide sensor of the comprehensive logging instrument needs to be heated, the isolation grid is skipped, a three-wire system mode is met, the interface requirements of the natural gamma sensor are met, although the models of the comprehensive logging instrument are various at present, the sensor types and the interface mode are basically consistent, so that the natural gamma sensor selects a hydrogen sulfide channel to be accessed, and performs corresponding gamma curve processing, and real-time correction is performed, and the data are obtained through warehousing corresponding delay correction.
By designing special natural gamma signal acquisition software and installing the software in a comprehensive logging instrument acquisition machine, the parameter setting of the comprehensive logging instrument is completed, the automatic acquisition and analysis of the logging instrument are ensured, customizable interval depth data are output, and the geological use data requirement is met. And a reference basis is provided for lithology identification, stratum comparison and horizon acquisition.
The logging method comprises the following steps:
1) the rock debris collector is arranged below the vibrating screen and is divided into an acquisition area, a measurement area and a sand discharge area, wherein the acquisition area is positioned at the upper part of the rock debris collector and is arranged in a wide-mouth shape, the measurement area is positioned at the middle part of the rock debris collector and is arranged in a vertically through box body, the lower part of the box body is provided with a fixed seat with holes, the sand discharge area is positioned at the lower part of the rock debris collector, and a quadrangular pyramid-shaped cone hopper is arranged below the inner part of the box body;
the outer diameter of the bottom of the cone hopper is larger than that of the box body, so that the bottom of the cone hopper is exposed out of the box body, and rock debris can be prevented from adhering to the inner wall of the box body and blocking the up-and-down movement of the cone hopper;
the upper part of the rock debris collector is specifically provided with a wide-mouth inclined plane, the inclination of the inclined plane is 60-70 degrees, the large inclination is beneficial to reducing the adhesion of rock debris on the surface, and the rock debris collector is close to or extends into a sand outlet position of the screen surface of the vibrating screen, so that fine rock debris is received, and the rock debris receiving area is increased;
a bottom plate is arranged below the cone hopper in the sand discharge area;
the bottom plate is provided with a main spring loop bar and an auxiliary spring contact pin, the main spring loop bar and the auxiliary spring contact pin are respectively provided with a main spring and an auxiliary spring, the main spring controls the cone hopper to move up and down, and the auxiliary spring ensures that the cone hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, a main spring sleeve and an auxiliary spring jack which are matched with the main spring sleeve rod and the auxiliary spring contact pin are arranged in the cone bucket, and the main spring sleeve and the auxiliary spring jack ensure that the square cone bucket only vertically moves when the square cone bucket is settled under the action of the gravity of rock debris;
the bottom plate is also provided with a screw rod, the screw rod is arranged in a hole of a box body fixing seat in the measuring area, the screw rod is also provided with an adjusting nut and a fixing nut on the upper side and the lower side of the fixing seat, and the adjusting nut and the fixing nut adjust the elastic force of the spring;
2) arranging a sensor supporting device in the acquisition area to place a natural gamma sensor;
the sensor supporting device comprises a fixing plate, a supporting plate and a hollow ring, wherein the fixing plate is arranged above the acquisition area, the supporting plate and the hollow ring form a cylindrical structure, the cylindrical structure is connected with the fixing plate, and one end part of the cylindrical structure extends into the 3/5 position of the measurement area so as to ensure that the natural gamma sensor has rock debris as much as possible within the measurement range;
3) the natural gamma sensor is detachably arranged in the sensor supporting device, so that the continuous measurement of natural gamma signals of the rock debris is ensured;
the natural gamma sensor comprises a sodium iodide crystal, a photomultiplier, a processing output circuit, a power supply circuit and an alloy shell, wherein the sodium iodide crystal, the photomultiplier and the processing output circuit are sequentially connected inside the alloy shell, the power supply circuit is arranged inside the alloy shell, receives an external power supply and supplies power to all components inside the natural gamma sensor, the sodium iodide crystal is provided with a shock pad, and a shock absorption spring is arranged at the tube seat of the photomultiplier to enhance the anti-seismic performance of the sodium iodide crystal and the photomultiplier;
the processing output circuit includes:
the processing module is used for finishing gamma counting and sending the gamma counting to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
the current signal conversion circuit is used for sending the converted gamma signals to the comprehensive logging instrument;
the processing output circuit is also provided with an anti-interference protective tube;
the power supply circuit is also provided with a high-voltage module for generating high voltage required by the processing output circuit;
the alloy shell is made of a shielding material which can effectively avoid external interference, and the alloy shell meets the requirements of field use through sealing and high-temperature tests;
4) gamma rays in the environment enter a sodium iodide crystal to generate photons, the photons are coupled to a photomultiplier to generate electrons, the electrons are accelerated and amplified by the photomultiplier to form a negative pulse voltage signal, the signal is sent to a processing output circuit in a natural gamma sensor, the processing output circuit directly sends the processed gamma signal to a comprehensive logging instrument, and the natural gamma sensor selects a hydrogen sulfide channel of the comprehensive logging instrument to be accessed;
5) the comprehensive logging instrument receives real-time gamma signals directly transmitted by the natural gamma sensor and outputs real-time natural gamma logging curves and real-time data by combining with the late depth parameters; the comprehensive logging instrument provides an external power supply for the natural gamma sensor;
6) the method comprises the steps of designing special natural gamma signal acquisition software, installing the software in a comprehensive logging instrument acquisition machine to complete parameter setting of the comprehensive logging instrument, ensuring automatic acquisition and analysis of the logging instrument, outputting customizable interval depth data and meeting geological use data requirements. And a reference basis is provided for lithology identification, stratum comparison and horizon acquisition.
The logging instrument is provided with a rock debris collector, which can realize continuous and quantitative acquisition of rock debris, a natural gamma sensor is detachably arranged in the rock debris collector to facilitate position adjustment, and the natural gamma sensor is directly connected with the comprehensive logging instrument to realize real-time online data processing;
the continuity while drilling of the invention realizes continuous measurement of underground rock debris, can know the geological logging condition in time during drilling, provides a real and accurate stratum rock debris gamma detection curve for logging technicians, provides reference basis for lithology identification, stratum comparison and horizon acquisition work, improves exploration timeliness, more accurately predicts coring horizon, buried hill interface and drilling completion depth, and avoids the occurrence of underground accidents.
Compared with common logging-while-drilling equipment, the device has the characteristics of simple structure, low cost, direct online use of the conventional mainstream comprehensive logging instrument and strong field practicability.
The continuous quantitative rock debris collector and the natural gamma sensor are designed and manufactured to form a continuous natural gamma logging instrument, the natural gamma sensor is connected with the comprehensive logging instrument to carry out data storage and depth correction, and data and a real-time curve are output, so that the following purposes are achieved.
1. The natural gamma logging while drilling can solve the problems that the rock debris is fine and the lithology of the rock debris cannot be identified;
2. the method can realize the division of strata, quickly identify lithology and provide decision basis for decision making of the first party;
3. the method can accurately divide the reservoir stratum and the non-reservoir stratum, identify the stratum of the ancient and ancient districts according to the natural gamma curve characteristics of carbonate rocks and metamorphic rocks, and accurately determine the depth of the buried hill interface.
4. According to the curve characteristics, stratum comparison can be carried out, the accuracy of predicting the coring position, the buried hill interface and the drilling completion depth is improved, reference is provided for accurately clamping the coring position and the buried hill interface, the geological cycle time is reduced, the well construction period is shortened, the occurrence of a vicious drilling underground accident is avoided, and the time efficiency of the whole exploration operation is greatly improved;
5. through comprehensive analysis of the natural gamma curve while drilling, the hydrocarbon reservoir can be analyzed and evaluated on site, and powerful basis is provided for comprehensive interpretation. Therefore, along with the development of new drilling technology, the popularization and application of the natural gamma ray logging technology of rock debris have become a necessary trend of the logging development.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A continuous natural gamma logging while drilling tool, comprising:
the rock debris collector is used for continuously collecting rock debris from the vibrating screen in a measuring area inside the vibrating screen, simultaneously keeping the quantity of the rock debris in the measuring area constant, discharging redundant rock debris on the premise of meeting the continuous detection requirement and maintaining the cyclic updating of the rock debris in the measuring area;
the natural gamma sensor penetrates into a measuring area of the rock debris collector and continuously measures natural gamma rays of rock debris in the measuring area, and simultaneously, the measured signal is directly transmitted into the comprehensive logging instrument, the comprehensive logging instrument processes a real-time signal directly transmitted from the natural gamma sensor and outputs a real-time natural gamma logging curve and real-time data by combining with a late depth parameter;
the natural gamma signal acquisition system is used for completing parameter setting of the comprehensive logging instrument, ensuring automatic acquisition and analysis of the logging instrument, outputting customizable interval depth data and providing reference basis for lithology identification, stratum comparison and horizon acquisition;
the rock debris collector is divided into an acquisition area, a measurement area and a sand discharge area;
wherein the sand discharge area is positioned at the lower part of the rock debris collector; the middle part of the measuring area, which is positioned on the rock debris collector, is provided with a vertically through box body, and a quadrangular pyramid-shaped cone hopper is arranged below the inner part of the box body; the outer diameter of the bottom of the conical hopper is larger than that of the box body, so that the bottom of the conical hopper is exposed out of the box body;
a bottom plate is also arranged below the cone hopper of the sand discharge area; the bottom plate is provided with a main spring loop bar and an auxiliary spring contact pin, the main spring loop bar and the auxiliary spring contact pin are respectively provided with a main spring and an auxiliary spring, the main spring controls the cone hopper to move up and down, and the auxiliary spring ensures that the cone hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, a main spring sleeve and an auxiliary spring jack which are matched with the main spring sleeve rod and the auxiliary spring contact pin are arranged in the cone hopper, and the main spring sleeve and the auxiliary spring jack ensure that the square cone hopper only vertically moves when the square cone hopper is settled under the action of the gravity of rock debris.
2. The continuous-while-drilling natural gamma logging tool as recited in claim 1, wherein the collection area is disposed at the upper part of the debris collector and is arranged in a wide mouth shape, and the collection area is further provided with a sensor support device;
the lower part of the box body is provided with a fixed seat with a hole.
3. The continuous-while-drilling natural gamma logging instrument as recited in claim 1, wherein the bottom plate is further provided with a screw rod, the screw rod is arranged in a hole of a fixed seat of the box body in the measurement area, the screw rod is further provided with an adjusting nut and a fixing nut on the upper side and the lower side of the fixed seat, and the adjusting nut and the fixing nut adjust the elastic force of the spring.
4. The continuous natural gamma logging while drilling tool of claim 2, wherein the sensor support comprises a fixed plate, a support plate and a hollow ring, the fixed plate is disposed above the collection area, the support plate and the hollow ring form a cylindrical structure, the cylindrical structure is connected to the fixed plate, and one end of the cylindrical structure extends into 3/5 of the measurement area, so as to ensure that there are as many cuttings as possible in the measurement area of the natural gamma sensor.
5. The continuous natural gamma logging while drilling instrument as recited in claim 2, wherein the upper portion of the debris collector is a wide-mouth inclined surface, the inclination of the inclined surface is 60-70 °, the large inclination helps to reduce the adhesion of surface debris, and the large inclination is close to or extends into a sand outlet position of the screen surface of the vibrating screen to receive fine debris and increase the sand receiving area.
6. The continuous natural gamma logging while drilling instrument as recited in claim 1, wherein the natural gamma sensor comprises a sodium iodide crystal, a photomultiplier, a processing output circuit, a power supply circuit and an alloy housing, the sodium iodide crystal, the photomultiplier and the processing output circuit are sequentially connected inside the alloy housing, the power supply circuit is arranged inside the alloy housing, receives an external power supply and supplies power to components inside the natural gamma sensor, the sodium iodide crystal is provided with a shock pad, and a shock absorbing spring is arranged at the base of the photomultiplier to enhance the shock resistance of the sodium iodide crystal and the photomultiplier.
7. The continuous-while-drilling natural gamma logging tool of claim 6, wherein the processing output circuit comprises:
the processing module is used for finishing gamma counting and sending the gamma counting to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
and the current signal conversion circuit is used for sending the converted gamma signals to the comprehensive logging instrument.
8. The while-drilling continuous natural gamma logging tool of claim 6, wherein the processing output circuit is further provided with an anti-interference protective tube, and the power supply circuit is further provided with a high voltage module for generating the high voltage required by the processing output circuit.
9. The continuous-while-drilling natural gamma logging tool of claim 6, wherein the alloy casing is made of a shielding material effective to avoid external interference.
10. The continuous-while-drilling natural gamma logging tool of claim 1, wherein the integral logging tool provides an external power source for a natural gamma sensor that selects access to a hydrogen sulfide channel of the integral logging tool.
11. A logging method of a continuous natural gamma logging instrument while drilling is characterized in that:
1) the rock debris collector is arranged below the vibrating screen and is divided into an acquisition area, a measurement area and a sand discharge area, wherein the acquisition area is positioned at the upper part of the rock debris collector and is arranged in a wide-mouth shape, the measurement area is positioned at the middle part of the rock debris collector and is arranged in a vertically through box body, the lower part of the box body is provided with a fixed seat with holes, the sand discharge area is positioned at the lower part of the rock debris collector, and a quadrangular pyramid-shaped cone hopper is arranged below the inner part of the box body;
the outer diameter of the bottom of the cone hopper is larger than that of the box body, so that the bottom of the cone hopper is exposed out of the box body, and rock debris can be prevented from adhering to the inner wall of the box body and blocking the up-and-down movement of the cone hopper;
the upper part of the rock debris collector is specifically provided with a wide-mouth inclined plane, the inclination of the inclined plane is 60-70 degrees, the large inclination is beneficial to reducing the adhesion of rock debris on the surface, and the rock debris collector is close to or extends into a sand outlet position of the screen surface of the vibrating screen, so that fine rock debris is received, and the rock debris receiving area is increased;
a bottom plate is arranged below the cone hopper in the sand discharge area;
the bottom plate is provided with a main spring loop bar and an auxiliary spring contact pin, the main spring loop bar and the auxiliary spring contact pin are respectively provided with a main spring and an auxiliary spring, the main spring controls the cone hopper to move up and down, and the auxiliary spring ensures that the cone hopper is not damaged and balanced by collected rock debris at the initial moment of collecting the rock debris;
correspondingly, a main spring sleeve and an auxiliary spring jack which are matched with the main spring sleeve rod and the auxiliary spring contact pin are arranged in the cone hopper, and the main spring sleeve and the auxiliary spring jack ensure that the square cone hopper only vertically moves up and down when the square cone hopper is settled under the action of the gravity of rock debris;
the bottom plate is also provided with a screw rod, the screw rod is arranged in a hole of a box body fixing seat in the measuring area, the screw rod is also provided with an adjusting nut and a fixing nut on the upper side and the lower side of the fixing seat, and the adjusting nut and the fixing nut adjust the elastic force of the spring;
2) arranging a sensor supporting device in the acquisition area to place a natural gamma sensor;
the sensor supporting device comprises a fixing plate, a supporting plate and a hollow ring, wherein the fixing plate is arranged above the acquisition area, the supporting plate and the hollow ring form a cylindrical structure, the cylindrical structure is connected with the fixing plate, and one end part of the cylindrical structure extends into the 3/5 position of the measurement area so as to ensure that the natural gamma sensor has rock debris as much as possible within the measurement range;
3) the natural gamma sensor is detachably arranged in the sensor supporting device, so that the continuous measurement of natural gamma signals of the rock debris is ensured;
the natural gamma sensor comprises a sodium iodide crystal, a photomultiplier, a processing output circuit, a power supply circuit and an alloy shell, wherein the sodium iodide crystal, the photomultiplier and the processing output circuit are sequentially connected inside the alloy shell, the power supply circuit is arranged inside the alloy shell, receives an external power supply and supplies power to all components inside the natural gamma sensor, the sodium iodide crystal is provided with a shock pad, and a shock absorption spring is arranged at the tube seat of the photomultiplier to enhance the anti-seismic performance of the sodium iodide crystal and the photomultiplier;
the processing output circuit includes:
the processing module is used for finishing gamma counting and sending the gamma counting to the digital-to-analog conversion module;
the digital-to-analog conversion module is used for completing the analog quantity conversion of gamma counting and sending the converted analog quantity to the current signal conversion circuit;
the current signal conversion circuit is used for sending the converted gamma signals to the comprehensive logging instrument;
the processing output circuit is also provided with an anti-interference protective tube;
the power supply circuit is also provided with a high-voltage module for generating high voltage required by the processing output circuit;
the alloy shell is made of a shielding material which can effectively avoid external interference, and the alloy shell meets the requirements of field use through sealing and high-temperature tests;
4) gamma rays in the environment enter a sodium iodide crystal to generate photons, the photons are coupled to a photomultiplier to generate electrons, the electrons are accelerated and amplified by the photomultiplier to form a negative pulse voltage signal, the signal is sent to a processing output circuit in a natural gamma sensor, the processing output circuit directly sends the processed gamma signal to a comprehensive logging instrument, and the natural gamma sensor selects a hydrogen sulfide channel of the comprehensive logging instrument to be accessed;
5) the comprehensive logging instrument receives real-time gamma signals directly transmitted by the natural gamma sensor and outputs real-time natural gamma logging curves and real-time data by combining with the late depth parameters; the comprehensive logging instrument provides an external power supply for the natural gamma sensor;
6) the method comprises the steps of designing special natural gamma signal acquisition software, installing the software in a comprehensive logging instrument acquisition machine to complete parameter setting of the comprehensive logging instrument, ensuring automatic acquisition and analysis of the logging instrument, outputting customizable interval depth data, and providing reference basis for lithology identification, stratum comparison and horizon acquisition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617179.XA CN106555586B (en) | 2015-09-24 | 2015-09-24 | Continuous natural gamma logging instrument while drilling and logging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510617179.XA CN106555586B (en) | 2015-09-24 | 2015-09-24 | Continuous natural gamma logging instrument while drilling and logging method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106555586A CN106555586A (en) | 2017-04-05 |
| CN106555586B true CN106555586B (en) | 2020-08-04 |
Family
ID=58415483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510617179.XA Active CN106555586B (en) | 2015-09-24 | 2015-09-24 | Continuous natural gamma logging instrument while drilling and logging method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106555586B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807411A (en) * | 2017-10-25 | 2018-03-16 | 中国石油化工股份有限公司 | A kind of high-quality shale core card layer prediction method |
| CN109798100A (en) * | 2018-12-25 | 2019-05-24 | 中国石油集团长城钻探工程有限公司 | Stratum based on nearly drill bit engineering parameter measurement-while-drilling judges recognition methods |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2413202A (en) * | 2003-01-17 | 2005-10-19 | Halliburton Energy Serv Inc | Integrated drilling dynamics system and method of operating same |
| CN101936929A (en) * | 2010-07-27 | 2011-01-05 | 中国石化集团华北石油局 | X-ray fluorescent element analysis device and mud logging unit thereof |
| CN203499679U (en) * | 2013-06-04 | 2014-03-26 | 中国石油化工股份有限公司 | Online detection device for natural gamma information of rock debris |
| CN103912269A (en) * | 2014-03-28 | 2014-07-09 | 中石化江汉石油工程有限公司测录井公司 | Method for determining formation fracture pressure gradient logging of shale gas reservoir |
| CN104329079A (en) * | 2014-09-09 | 2015-02-04 | 中国石油大学(北京) | Method and system for recognizing gas logging oil and gas reservoir |
| CN204238930U (en) * | 2014-11-19 | 2015-04-01 | 单衍涛 | A kind of geological logging coring apparatus |
| US9022140B2 (en) * | 2012-10-31 | 2015-05-05 | Resource Energy Solutions Inc. | Methods and systems for improved drilling operations using real-time and historical drilling data |
-
2015
- 2015-09-24 CN CN201510617179.XA patent/CN106555586B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2413202A (en) * | 2003-01-17 | 2005-10-19 | Halliburton Energy Serv Inc | Integrated drilling dynamics system and method of operating same |
| CN101936929A (en) * | 2010-07-27 | 2011-01-05 | 中国石化集团华北石油局 | X-ray fluorescent element analysis device and mud logging unit thereof |
| US9022140B2 (en) * | 2012-10-31 | 2015-05-05 | Resource Energy Solutions Inc. | Methods and systems for improved drilling operations using real-time and historical drilling data |
| CN203499679U (en) * | 2013-06-04 | 2014-03-26 | 中国石油化工股份有限公司 | Online detection device for natural gamma information of rock debris |
| CN103912269A (en) * | 2014-03-28 | 2014-07-09 | 中石化江汉石油工程有限公司测录井公司 | Method for determining formation fracture pressure gradient logging of shale gas reservoir |
| CN104329079A (en) * | 2014-09-09 | 2015-02-04 | 中国石油大学(北京) | Method and system for recognizing gas logging oil and gas reservoir |
| CN204238930U (en) * | 2014-11-19 | 2015-04-01 | 单衍涛 | A kind of geological logging coring apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106555586A (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102759751B (en) | High-resolution three-dimensional resistivity CT imaging advanced prediction system and method for underground engineering | |
| Qin et al. | Analysis of signal characteristics from rock drilling based on vibration and acoustic sensor approaches | |
| CN1177402A (en) | Accelerator-based method and apparatus for measurement -while -drilling | |
| CN106555586B (en) | Continuous natural gamma logging instrument while drilling and logging method thereof | |
| CN104536056A (en) | Small-bore gamma-ray spectra well logging device as well as data acquisition transmission and self-stabilization method | |
| CN202946149U (en) | Logging while drilling natural gamma logging instrument | |
| CN202441370U (en) | Logging while drilling azimuth gamma detection instrument | |
| CN103032100A (en) | Intelligent dynamic disaster risk detection method for mine | |
| CN208984386U (en) | A kind of hydrogeology sample acquisitions device | |
| CN209264613U (en) | A kind of refuse landfill pollutant diffusion monitoring device based on resistivity CT imaging | |
| CN208089228U (en) | A kind of real-time intelligent drill bit for obtaining underground parameter | |
| CN103628869B (en) | The online GR logging of landwaste towards lithology and logging method thereof | |
| CN203499679U (en) | Online detection device for natural gamma information of rock debris | |
| CN213175500U (en) | Drilling device for rock geological exploration | |
| CN201730614U (en) | Wired MWD gamma energy spectrum log tool | |
| CN212665846U (en) | Clamping device and instrument clamping device of radioactive logging wellhead | |
| CN202451138U (en) | Ultra-deep hole measuring device for geological exploration | |
| CN206319881U (en) | A kind of new litho-density log system | |
| CN205297570U (en) | Logging instrument gamma detector | |
| CN211927347U (en) | Geotechnical sampling device for geotechnical engineering | |
| CN201254987Y (en) | Horizontal long drilling on-drilling clinometer | |
| CN211348640U (en) | Seismic prospecting instrument | |
| CN105626061B (en) | Underground borehole structure detector and detection method | |
| CN202486330U (en) | Well logging exploring pipe | |
| CN105629318A (en) | Measurement system for natural gamma radioactivity of ground rock debris |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |