CN110412064B - Drilling fluid nuclear magnetic resonance on-line measuring system - Google Patents
Drilling fluid nuclear magnetic resonance on-line measuring system Download PDFInfo
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- CN110412064B CN110412064B CN201810391607.5A CN201810391607A CN110412064B CN 110412064 B CN110412064 B CN 110412064B CN 201810391607 A CN201810391607 A CN 201810391607A CN 110412064 B CN110412064 B CN 110412064B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
A drilling fluid nuclear magnetic resonance on-line measuring system includes: the drilling fluid pretreatment device is used for pretreating the drilling fluid; the quantitative sampling device is used for quantitatively extracting the pretreated drilling fluid to obtain a drilling fluid sample; the automatic relaxant adding device is used for providing a corresponding amount of relaxants according to a preset mixing ratio of the relaxants to the drilling fluid; the mixing device is used for uniformly mixing the obtained drilling fluid sample and the relaxation agent to obtain a mixed sample; and the nuclear magnetic resonance analyzer is used for performing nuclear magnetic resonance analysis on the mixed sample. The system can detect the oil content of the drilling fluid through nuclear magnetic resonance, thereby providing oil-containing information for evaluation and explanation of oil-gas reservoirs and providing a detection system and means for finding the oil-containing reservoirs under the condition of low oil-gas ratio reservoirs or fluorescent drilling fluid. The system can also be applied to continuous analysis of oil-water solution in the process of oil exploitation to obtain the oil content or the water content in the mixed solution.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration, in particular to a drilling fluid nuclear magnetic resonance online detection system.
Background
During drilling, the hydrocarbons in the reservoir may enter the drilling fluid, which may carry the hydrocarbons to the surface through circulation. Therefore, the oil and gas detection while drilling on the ground can find the oil and gas reservoir in real time and rapidly, position the oil and gas reservoir, explain the oil and gas properties and the like. The detection method has low cost and good effect, reduces the multi-solution property of oil gas interpretation and development operation, and is one of the commonly adopted oil gas detection methods. Currently, the widely applied ground-based oil and gas detection while drilling is gas detection, namely, the oil and gas reservoir is determined and explained by detecting the content of gaseous light hydrocarbon.
Disclosure of Invention
In order to solve the above problems, the present invention provides an online drilling fluid nuclear magnetic resonance detection system, which comprises:
the drilling fluid pretreatment device is used for pretreating the drilling fluid;
the quantitative sampling device is connected with the drilling fluid pretreatment device and is used for quantitatively extracting the pretreated drilling fluid to obtain a drilling fluid sample;
the automatic relaxant adding device is used for providing a corresponding amount of relaxants according to the sampling amount of a drilling fluid sample based on the preset mixing ratio of the relaxants to the drilling fluid;
the mixing device is connected with the quantitative sampling device and the relaxation agent automatic adding device and is used for uniformly mixing the obtained drilling fluid sample and the relaxation agent to obtain a mixed sample for nuclear magnetic resonance analysis;
and the nuclear magnetic resonance analyzer is connected with the mixing device and is used for performing nuclear magnetic resonance analysis on the mixed sample.
According to one embodiment of the invention, the drilling fluid pretreatment device is arranged at the front end of the sampling pipe and is used for filtering solid-phase impurities in the drilling fluid.
According to one embodiment of the invention, the quantitative sampling device comprises a quantitative pump configured to pump a quantitative amount of drilling fluid per unit time.
According to one embodiment of the invention, the nmr analyzer is connected to the quantitative sampling device and/or the relaxation agent automatic addition device, and is configured to control an operation state of the quantitative sampling device and a sample amount of the provided drilling fluid sample and/or control an operation state of the relaxation agent automatic addition device and an addition amount of the provided relaxation agent.
According to one embodiment of the invention, the nuclear magnetic resonance analyzer comprises:
the nuclear magnetic resonance detection module is connected with the mixing device and used for performing nuclear magnetic resonance detection on the drilling fluid sample of the mixed relaxant provided by the mixing device and analyzing and sampling the obtained nuclear magnetic resonance detection signal to obtain a nuclear magnetic resonance detection result;
the data acquisition and transmission module is connected with the nuclear magnetic resonance detection module and is used for acquiring data of the nuclear magnetic resonance detection result and transmitting the acquired data to a corresponding device in communication connection with the nuclear magnetic resonance detection module;
and the result analysis module is in communication connection with the data acquisition and transmission module and is used for analyzing and calculating the data transmitted by the data acquisition and transmission module to obtain a nuclear magnetic resonance analysis result.
According to an embodiment of the invention, the nuclear magnetic resonance analyzer further comprises:
and the instrument control module is connected with the nuclear magnetic resonance detection module and is used for controlling the running state of the nuclear magnetic resonance detection module.
According to an embodiment of the present invention, the instrument control module is further connected to the quantitative sampling device and/or the relaxation agent automatic adding device, and is configured to control an operation state of the quantitative sampling device and/or the relaxation agent automatic adding device.
According to one embodiment of the invention, the nuclear magnetic resonance detection module comprises:
the nuclear magnetic resonance unit is connected with the mixing device and is used for performing nuclear magnetic resonance treatment on the mixed sample to obtain a nuclear magnetic resonance echo signal;
and the nuclear magnetic resonance spectrum analysis unit is connected with the nuclear magnetic resonance unit and is used for performing spectrum analysis on the nuclear magnetic resonance echo signals to obtain the nuclear magnetic resonance detection result.
According to one embodiment of the invention, the nuclear magnetic resonance unit comprises:
a nuclear magnetic resonance magnet for forming a detection region of uniform magnetic field intensity;
the drilling fluid quantitative detection tube is connected with the mixing device and is used for placing a quantitative mixed sample in a detection area formed by the nuclear magnetic resonance magnet;
and the excitation receiving antenna is used for exciting an electromagnetic signal during nuclear magnetic resonance detection and receiving a nuclear magnetic resonance echo signal of the mixed sample.
According to one embodiment of the invention, the drilling fluid quantitative detection tube is a U-shaped tube, and the height of the fluid inlet and the fluid outlet of the drilling fluid quantitative detection tube is higher than that of the tube body at the position of the detection area.
According to one embodiment of the invention, the nuclear magnetic resonance magnet, the drilling fluid quantitative detection tube and the excitation receiving antenna are arranged in a nuclear magnetic resonance sensing chassis, and the nuclear magnetic resonance magnet is fixedly connected with the nuclear magnetic resonance sensing chassis through a magnet mounting bracket.
According to one embodiment of the invention, a thermostat is further disposed in the nuclear magnetic resonance sensor case, and the thermostat is used for stabilizing the temperature in the nuclear magnetic resonance sensor case, so as to ensure the stability of the resonance frequency of the detection magnet.
According to one embodiment of the invention, the nmr spectrum analysis unit and the nmr unit are arranged in different housings, and are communicatively connected by a radio frequency antenna.
The drilling fluid nuclear magnetic resonance online detection system provided by the invention can realize the quantitative detection of the nuclear magnetic resonance of the drilling fluid, and can realize the detection of the oil content of the drilling fluid through the nuclear magnetic resonance, thereby providing oil content information for the evaluation and the explanation of an oil and gas reservoir.
Meanwhile, the system can realize the oil quantity detection of the drilling fluid, so that an instrument capable of accurately finding an oil-containing reservoir and detecting the oil content is provided for the reservoir with the low oil-gas ratio. The system can also detect the oil content or the water retention rate in the oil-water mixed liquid, so that the system is also suitable for continuously detecting the oil content or the water retention rate of the produced liquid in the oil extraction process.
According to experimental research, because the signal which interferes with the detection of the oil content of the drilling fluid does not appear in the nuclear magnetic resonance detection of the common fluorescent additive for processing the drilling fluid, or the signal which influences the detection of the oil content of the drilling fluid in the nuclear magnetic resonance detection can be eliminated by adding the relaxant, the system is also suitable for the oil content detection under the condition of the fluorescent drilling fluid, and the fluorescent drilling fluid can be processed or not processed by applying the system, so that the drilling time efficiency is greatly improved, and the drilling cost is effectively reduced.
The drilling fluid nuclear magnetic resonance online detection system can adopt a split type structure according to actual needs, and the split type structure can effectively reduce the weight and the volume of a single instrument, so that the drilling fluid nuclear magnetic resonance online detection system can better adapt to a field installation environment, and the flexibility, the maintainability and the safety of the instrument are improved. Meanwhile, the split structure is adopted to be installed on the site, and differential detection can be provided, so that the obtained information such as oil-containing information of the reservoir is more real and accurate.
In addition, the online nuclear magnetic resonance detection system for the drilling fluid can more accurately realize the nuclear magnetic resonance detection of the drilling fluid by utilizing the automatic relaxant adding device, and can be widely applied to various complex drilling fluid systems such as oil-based, water-based and fluorescence adding systems.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic structural diagram of a drilling fluid NMR online detection system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a nuclear magnetic resonance analyzer according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a nuclear magnetic resonance analyzer according to an embodiment of the present invention;
fig. 4 is a schematic work flow diagram of a drilling fluid nuclear magnetic resonance online detection system according to an embodiment of the invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
Along with the deep exploration and development, unconventional oil and gas, compact oil reservoirs, heavy oil reservoirs and the like become drilling targets at present, and the drilling environment also relates to offshore, alpine and onshore drilling. In order to improve the exploration time, the current oil and gas detection method has a plurality of limitations.
Hydrocarbon reservoirs contain oil and gas. Practice proves that reservoir characteristics can be accurately evaluated only by comprehensively detecting oil and gas, and oil and gas characteristics, migration modes, reservoir modes and the like can be explained. However, currently applied hydrocarbon detection methods are generally gas detection, and therefore important oil-containing information is lost when describing and evaluating hydrocarbon reservoirs.
Meanwhile, quantitative oil-gas detection can accurately evaluate the oil-gas productivity of a reservoir, so that the oil-gas detection method also needs to carry out quantitative detection on the oil content, which cannot be realized by the currently common qualitative oil-gas detection method. In addition, in oil-bearing reservoirs with low gas-oil ratio, the content of gaseous hydrocarbons is low, so that the oil-bearing reservoirs are often difficult to find only by gas measurement.
Oil and gas drilling has higher requirements on cost control and single well yield improvement, so that horizontal wells and extended reach wells are common technical means, and the drilling difficulty and risk are increased. In order to ensure safety, crude oil, fluorescent additives and other substances are usually mixed in the drilling fluid, and the substances generate high fluorescence intensity in the drilling fluid and cover the real crude oil fluorescence intensity of rock debris, so that the real oil content of a reservoir stratum is difficult to find through rock debris fluorescence.
And because the fluorescent drilling fluid influences the discovery of the oil and gas reservoir, the drilling fluid needs to be stopped in the drilling process, so that the fluorescence intensity is reduced to the standard of normal rock debris fluorescence identification. This process significantly increases drilling costs and reduces drilling time efficiency, and thus a technology and method that can accurately perform oil-bearing tests under fluorescent drilling fluid conditions is urgently needed.
The nuclear magnetic resonance instrument of the drilling fluid in the laboratory has large volume and heavy weight, and is not suitable for field application. In the process of detecting a drilling fluid sample in a laboratory, the data has no continuity and comparability, and the obtained data is insufficient for accurately evaluating the oil-containing characteristics of an oil-gas reservoir. On the other hand, the performance of the drilling fluid is changed after the drilling fluid is stood for a long time after the drilling fluid is sampled from the field to be detected in a laboratory, so that the data obtained by laboratory detection cannot reflect the real oil-bearing characteristics of a reservoir.
Meanwhile, in a laboratory, the effect of improving the drilling fluid nuclear magnetic resonance detection by using the relaxation agent is proved, but the relaxation agent cannot be added during on-site real-time continuous detection, so that the continuous drilling fluid nuclear magnetic resonance detection is greatly limited.
Research shows that the low-field nuclear magnetic resonance technology of the drilling fluid can detect the oil content in the drilling fluid, but a drilling fluid nuclear magnetic resonance detection instrument which can be installed on site, can perform real-time online detection, and has stable performance, high mobility and strong adaptability needs to be developed.
Aiming at the problems in the prior art, the invention provides a novel drilling fluid nuclear magnetic resonance online detection system. The drilling fluid nuclear magnetic resonance online detection system can be used for detecting the oil-containing property and content in the drilling fluid while drilling, can also be applied to the exploitation of an oil well, and continuously analyzes the content of oil or water in a mixed solution, so that the real-time property and the automation level of detection are improved.
Fig. 1 shows a schematic structural diagram of the drilling fluid nuclear magnetic resonance online detection system provided in this embodiment.
As shown in fig. 1, the drilling fluid nuclear magnetic resonance online detection system provided in this embodiment includes: the device comprises a drilling fluid pretreatment device 101, a quantitative sampling device 102, an automatic relaxant adding device 103, a mixing device 104 and a nuclear magnetic resonance analyzer 105.
The drilling fluid pretreatment device 101 is used for obtaining drilling fluid and pretreating the drilling fluid. In this embodiment, a drilling fluid pre-treatment device 101 is preferably provided at the front end of the sampling tube (e.g., the outlet region where drilling fluid returns out of the wellhead or the inlet tank region where drilling fluid is circulated into the well) for filtering solid phase impurities in the drilling fluid.
Specifically, the drilling fluid pretreatment device 101 is in the drilling fluid during the drilling process, so that the drilling fluid pretreatment device 101 can obtain the drilling fluid while drilling. Meanwhile, the drilling fluid pretreatment device 101 can also filter silt and other solid impurities in the drilling fluid, so that a drilling fluid sample similar to a full liquid state is obtained, and the quality of the drilling fluid sample suitable for nuclear magnetic resonance detection is ensured. In addition, the drilling fluid pretreatment device 101 preferably can also clean the surface from deposits of impurities when treating the drilling fluid, which helps to ensure the continuity and stability of the injection.
For example, in one embodiment of the present invention, the drilling fluid preparation device 101 may be implemented using a sampling probe with a surface scraper. The probe can drive the scraper to clean the probe through the flexible shaft, so that the surface scraper rotates, and self-cleaning is further realized. The continuity of sampling can be effectively guaranteed to the application pivot drive scraper cleaning probe. The sampling probe with the surface scraper is used in drilling fluid with high density and viscosity, especially drilling of deep wells and ultra-deep wells.
In another embodiment of the present invention, the drilling fluid pretreatment device 101 may be implemented by a cylindrical filter cartridge with a filter device. The speed of the drilling fluid passing through the flow channel can be calculated through the area of the flow channel of the filter hole and the extraction flow of the drilling fluid, the filter cylindrical device can be arranged in an installation area where the flow speed of the drilling fluid is larger than the speed of the drilling fluid passing through the filter flow channel, in addition, in an actual drilling site, the filter device can also adjust or customize the size of the filter device by calculating the speed of the drilling fluid of the filter flow channel according to the flow speed condition of the drilling fluid on the site, the flow speed of the drilling fluid on the site is ensured to be larger than the speed of the drilling fluid of the flow channel, and therefore the surface of the probe can be cleaned by utilizing the scouring speed of the drilling fluid. The probe does not need external power, is convenient to install and use, and is mainly used for drilling fluid with low density and viscosity.
The quantitative sampling device 102 is connected with the drilling fluid pretreatment device 101, and can quantitatively extract the drilling fluid according to actual needs, so that a drilling fluid sample is obtained. In this embodiment, the quantitative sample feeding device 102 preferably includes a quantitative pump, and the quantitative pump can pump a fixed amount of drilling fluid in a unit time, so that the sample amount of the drilling fluid analyzed each time later can be ensured.
The automatic relaxant adding device 103 can provide a corresponding amount of relaxants according to the sampling amount of a drilling fluid sample based on the preset mixing ratio of the relaxants to the drilling fluid. Specifically, in this embodiment, the relaxation agent automatic adding device 103 can determine the currently required dosage of the relaxation agent according to the mixing ratio of the relaxation agent and the drilling fluid (which may be transmitted by the nmr analyzer 105) corresponding to the current detection process. The automatic relaxant adding device 103 may extract the corresponding dose of relaxant based on the required dose of relaxant, so as to achieve the optimal mixing ratio or the required mixing ratio of the added relaxant in the drilling fluid. In this embodiment, the relaxation agent automatic adding device 103 preferably includes a quantitative pump and a liquid precision flow sensor, so that the quantitative and accurate addition of the relaxation agent can be effectively ensured.
The mixing device 104 is connected with the quantitative sampling device 102 and the relaxation agent automatic adding device 103, and can uniformly mix the obtained drilling fluid sample and the relaxation agent, so that a mixed sample is obtained. In this embodiment, the quantitative sampling device 102, the relaxant automatic adding device 103, and the mixing device 104 are preferably disposed on the drilling fluid sampling support and connected by using a hose.
Of course, in other embodiments of the present invention, the setting positions and the connection manners of the quantitative sample injection device 102, the relaxation agent automatic adding device 103 and the mixing device 104 may also adopt other reasonable manners, and the present invention is not limited thereto.
After obtaining the mixed sample, in this embodiment, the mixing device 104 transfers the obtained mixed sample to the nmr analyzer 105 connected thereto, so that the nmr analyzer 105 performs nmr analysis on the mixed sample.
In this embodiment, the nmr analyzer 105 is preferably connected to the quantitative sampling device 102 and the relaxant automatic adding device 103, and is capable of controlling the operation state of the quantitative sampling device 102 and the sample amount of the drilling fluid sample provided by the quantitative sampling device 102. Meanwhile, the nmr analyzer 105 can also control the operation state of the relaxor automatic addition device 103 and the addition amount of the relaxor supplied from the relaxor automatic addition device 103.
It should be noted that, in other embodiments of the present invention, the nmr analyzer 105 may also be connected to the quantitative sample injector 102 or the relaxant automatic adding device 103, so as to control the operation state of the quantitative sample injector 102 or the relaxant automatic adding device 103 according to actual needs.
Fig. 2 shows a schematic configuration diagram of the earth-magnetic resonance analyzer 105 provided in the present embodiment.
As shown in fig. 2, in the present embodiment, the nuclear magnetic resonance analyzer 105 preferably includes: a nuclear magnetic resonance detection module 201, a data acquisition and transmission module 202 and a result analysis module 203. The nmr detection module 201 is connected to the mixing device 104, and is capable of performing nmr detection on the mixed sample provided by the mixing device 104 and analyzing and sampling the obtained nmr detection signal to obtain an nmr detection result.
The data acquisition and transmission module 202 is connected to the nmr detection module 201, and is capable of acquiring data of the nmr detection result transmitted by the nmr detection module 201 and transmitting the acquired data to a corresponding device in communication connection therewith.
The result analysis module 203 is in communication connection with the data acquisition and transmission module 202, and is capable of analyzing and calculating the data transmitted by the data acquisition and transmission module, so as to obtain a nuclear magnetic resonance analysis result.
For example, in this embodiment, the analog and digital acquisition card of the data acquisition and transmission module 202 may be implemented by a plurality of analog and digital acquisition cards having 16 analog data channels, 8 digital acquisition channels, 8 data output channels, and a network output terminal. Meanwhile, the data acquisition and transmission module 202 may further include a separate data interface card and a wired and/or wireless router. The data interface card can enable the data acquisition and transmission module to have a remote control USB interface-to-network interface, and the wired and/or wireless router can enable the data acquisition and transmission module and the structural analysis module to perform data interaction based on a wired mode and/or a wireless mode.
In this embodiment, the nmr analyzer preferably further includes an instrument control module. The instrument control module is connected with the nuclear magnetic resonance detection module 201 and can control the running state of the nuclear magnetic resonance detection module, so that the nuclear magnetic resonance detection of the mixed sample is realized.
Preferably, in this embodiment, the nmr analyzer may be further connected to the quantitative sample injector 102 and the relaxant automatic adding device 103, and the nmr analyzer can control the operation states of the quantitative sample injector 102 and the relaxant automatic adding device 103, so as to control the dosage of the drilling fluid sample provided by the quantitative sample injector 102 and the addition amount of the relaxant provided by the relaxant automatic adding device 103.
Of course, the nuclear magnetic resonance detection module 201, the data acquisition and transmission module 202, and the result analysis module 203 of the present invention may be configured reasonably according to actual working requirements, and are not limited to the selection of the above-mentioned devices for acquisition, transmission, and the like.
Fig. 3 shows a schematic structural diagram of the nuclear magnetic resonance analyzer in this embodiment.
As shown in fig. 3, in the present embodiment, the nmr analyzer preferably mainly includes a pressurization explosion-proof main control cabinet 7 and an nmr sensor cabinet 13. Wherein, a gas pressurizing module 6 is arranged in the pressurizing explosion-proof main control case body 7. The gas pressurization module 6 can provide pressurized gas for the pressurization explosion-proof main control cabinet body 7, so that an explosion-proof instrument under the working condition of a drilling site is formed.
In this embodiment, the nmr analyzer preferably includes an instrument shock mount 18. Among other things, instrument shock mount 18 can form a mounting base for a nuclear magnetic resonance analyzer, which helps reduce vibration of drilling equipment to instruments installed at a drilling site, thereby improving instrument reliability.
In this embodiment, the nmr detection module preferably includes an nmr unit and an nmr spectrum analysis unit 24. The nmr unit is preferably disposed in the nmr sensor housing 13, connected to the mixing device, and is capable of performing nmr processing on the mixed sample delivered by the mixing device to obtain an nmr echo signal.
Specifically, as shown in fig. 3, in the present embodiment, the nuclear magnetic resonance unit preferably includes: a nuclear magnetic resonance magnet (i.e. a nuclear magnetic resonance sensor magnet) 20, a drilling fluid quantitative detection tube 21 and an excitation receiving antenna. Wherein a nuclear magnetic resonance magnet (i.e. a nuclear magnetic resonance sensor) 20 is used to provide a detection area of uniform magnetic field strength. Specifically, in the present embodiment, the nmr magnet 20 is preferably formed of a permanent magnet, which is a ring-shaped columnar structure, and a detection region having a uniform magnetic field intensity is formed at the center position inside the ring formed of the magnet, and the detection region is a columnar structure, which is a detection region of the mixed sample.
In this embodiment, the nmr magnet (i.e., nmr sensor magnet) 20 is preferably secured to the nmr sensor housing 13 by an nmr mounting bracket 19. The nmr mounting bracket 19 is preferably composed of three pairs of dampers, and can adjust the mounting height of the nmr magnet 20 and provide a damping function for the nmr magnet 20.
Of course, in other embodiments of the present invention, the connection between the nmr magnet 20 and the nmr sensor housing 13 may be in other reasonable manners, and the present invention is not limited thereto.
The drilling fluid quantitative detection tube 21 is connected to a mixing device, which is capable of placing a quantitative mixed sample in a detection area formed by the nmr magnet 20. Specifically, in the present embodiment, the mixed sample flows into or out of the drilling fluid quantitative detection tube 21 through a fluid flow path formed by the fluid inlet 14 and the fluid outlet 23 of the drilling fluid quantitative detection tube 21. Of course, in other embodiments of the present invention, the positions of the liquid inlet 14 and the liquid outlet 23 of the drilling fluid quantitative detection tube 21 can be interchanged according to practical situations. That is, the mixed sample can enter the drilling fluid quantitative detection tube 21 from the fluid inlet 14, and can also flow into the drilling fluid quantitative detection tube 21 from the fluid outlet 23, and the two effects are the same.
In this embodiment, the drilling fluid quantitative detection tube 21 is preferably made of polytetrafluoroethylene, so that the drilling fluid quantitative detection tube 21 does not generate a nuclear magnetic resonance signal, and detection noise can be effectively reduced.
In order to facilitate the field connection, the drilling fluid quantity detection pipe 21 is preferably a U-shaped structure in the present embodiment. Specifically, the liquid inlet 14 and the liquid outlet 23 of the drilling fluid quantitative detection tube 21 are higher than the tube body at the detection area. The structure of the drilling fluid quantitative detection tube 21 can ensure that the drilling fluid quantitative detection tube 21 is full of drilling fluid, so that the detection quality is improved, and the analysis of ineffective samples is reduced. In addition, because the volume of the detection pipeline of the drilling fluid quantitative detection pipe 21 is fixed, the sample detected by nuclear magnetic resonance is also quantitative.
The excitation receiving antenna is used for exciting electromagnetic signals during detection and receiving nuclear magnetic resonance detection signals of the drilling fluid. The excitation receiving antenna is connected with the radio frequency line and connected with the nuclear magnetic resonance spectrum analysis unit.
In this embodiment, the sensor rf antenna external explosion-proof plug 22 is connected to the excitation receiving antenna of the drilling fluid quantitative detection tube 21 inside the nuclear magnetic resonance sensor case 13, and is connected to the nuclear magnetic resonance spectrometer rf antenna access plug 25 outside the nuclear magnetic resonance sensor case for transmitting rf signals and nuclear magnetic resonance signals.
Specifically, the nmr spectrum analysis unit 24 can control the excitation receiving antenna of the drilling fluid quantitative detection tube 21, so as to excite the radio frequency signal and collect the micro nmr signal (i.e., the nmr echo signal) received by the excitation receiving antenna. After receiving the nmr echo signal, the nmr spectrum analyzing unit 24 amplifies, processes, and calculates the signal, thereby forming an effective nmr detection signal.
In this embodiment, the radio frequency antenna access plug-in 25 of the nmr spectrum analysis unit is connected to the nmr spectrum analysis unit 24 in the chassis, and is externally connected to the external explosion-proof plug-in 22 of the sensor radio frequency antenna, so as to control the excitation receiving antenna in the drilling fluid quantitative detection tube 21 to transmit and receive corresponding radio frequency signals.
As shown in fig. 3, in this embodiment, a thermostat 17 is further disposed in the nmr sensor case 13, and the thermostat 17 can stabilize the temperature in the nmr sensor case 13. In particular, in the present embodiment, the thermostatic device 17 preferably comprises an explosion-proof heating device, a heat preservation system and a temperature sensor, which can provide a thermostatic system for the whole drilling fluid magnetic resonance unit.
The thermal insulation device is preferably made of a series of thermal insulation materials and reflective thermal mass materials, and can form a thermal insulation layer and a reflective layer in the nuclear magnetic resonance sensor case 13, so that an effective thermal insulation function can be formed. The explosion-proof heating device can be controlled by the temperature controller to heat, and the temperature sensor can detect the temperature in real time, so that a constant temperature system is formed in the case.
In particular, in the present embodiment, the explosion-proof heating device of the thermostatic device 17 preferably includes an explosion-proof self-temperature-control heating belt, which can perform thermostatic heating under the cooperative work of the temperature sensor and the temperature controller. The heat preservation system is preferably composed of 5-10mm flame-retardant moisture-preserving cotton, and a heat reflecting layer is covered on the moisture-preserving cotton to keep constant temperature and save energy to the maximum extent. And the temperature sensor is preferably a metal platinum resistor for detecting the present temperature.
In this embodiment, the constant temperature power supply and sensor connection explosion-proof connector 8 connects the controllable heating power supply and sensor with the temperature control and heating explosion-proof connector 16 to provide the heating power supply for the constant temperature device 17 and transmit the temperature signal in the nuclear magnetic resonance sensor case 13 to the pressurization explosion-proof main control case 7.
In this embodiment, the data acquisition and transmission module (i.e., module 9) includes a data acquisition unit and a data exchange and transmission unit. The data acquisition unit can acquire the nmr detection result transmitted by the nmr spectrum analysis unit 24, the relevant data transmitted by the result analysis module (i.e., the module 30), and the relevant temperature data. The data exchange and transmission unit can correspondingly send the data acquired by the data acquisition unit to each control and analysis unit. In this embodiment, the data exchange transmission unit is preferably connected to the results analysis module (i.e., module 30) via a remote data transmission line 28 for data interaction with the results analysis module (i.e., module 30).
It should be noted that, in other embodiments of the present invention, the data transmission mode between the data exchange transmission unit and the result analysis module may also be other reasonable modes (for example, wireless transmission, etc.) according to actual needs, and the present invention is not limited thereto.
In this embodiment, optionally, the pressurization explosion-proof main control cabinet 7 and the nmr sensor cabinet 13 may be further provided with a control cabinet carrying handle 10 and an nmr sensor cabinet handle 15, respectively, so as to facilitate manual carrying of the cabinets.
Meanwhile, preferably, the booster explosion-proof main control cabinet 7 is further provided with a ground wire column connection ground wire 11. The ground post to ground wire 11 is used to connect to ground, thereby providing ground safety for the instrument.
In this embodiment, the instrument control module 26 can receive the command and the control data transmitted by the result analysis module 30 through the data acquisition and transmission module 9, so as to coordinate the main power of the control system. According to the above commands and control data, the instrument control module 26 can also control the working timing and working state of the quantitative sample introduction device 102, the relaxation agent automatic adding device 103, and the mixing device 104, so as to ensure that the nuclear magnetic resonance analyzer 105 can obtain the mixed sample quantitatively and continuously.
Based on the commands and control data, the instrument control module 26 can also control the operation of the data transmission acquisition module (i.e., module 9) and the nmr spectrum analysis unit 24. According to actual needs, the instrument control module 26 can also control the thermostat 17 to heat the temperature, so that the temperature in the nuclear magnetic resonance sensor case is kept constant.
In this embodiment, the explosion-proof connector 27 of the output power supply can be connected to the output power supply for controlling the quantitative sampling device 102, the relaxation agent automatic adding device 103, and the mixing device 104. While the primary explosion-proof connector 20 is preferably connected to a corresponding external power source (e.g., 220VAC power source) that is capable of providing a power supply for the entire system.
In this embodiment, structural analysis module installs corresponding measurement and control model, and it can provide multiple functions such as control, real-time data acquisition, operation, demonstration and storage of system.
As shown in fig. 3, in this embodiment, the nuclear magnetic resonance analyzer may be combined by the pressurizing explosion-proof main control cabinet 7 and the nuclear magnetic resonance sensor cabinet 13 through the connector 12 into an integrated structure. It should be noted that, in other embodiments of the present invention, the pressurized explosion-proof main control cabinet 7 and the nuclear magnetic resonance sensor cabinet 13 may also be installed separately according to field requirements, so that the adaptability and flexibility of the nuclear magnetic resonance analyzer can be effectively improved. Simultaneously, split type structure can come out nuclear magnetic resonance magnet great ground with weight independently, has further reduced the weight of monomer instrument like this, can provide solitary constant temperature system for nuclear magnetic resonance magnet simultaneously to nuclear magnetic resonance frequency has helped having stabilized. In addition, the mixed sample passes through the nuclear magnetic resonance sensing cabinet 13 independently, so that the liquid and the control circuit can be separated, and the safety performance of the instrument can be improved.
In order to more clearly illustrate the principle, the working process and the advantages of the drilling fluid nuclear magnetic resonance online detection system provided by the embodiment, the following description is further made with reference to the working process schematic diagram of the drilling fluid nuclear magnetic resonance online detection system shown in fig. 4.
As shown in fig. 4, in this embodiment, the result analysis module first sends a corresponding analysis control command to the data collection and transmission module in time sequence in step S401, and performs data exchange and command transmission with the instrument control module.
In step S402, the instrument control module controls the quantitative sampling device to extract the drilling fluid sample from the drilling fluid pretreatment device according to the received timing sequence of the control command. Meanwhile, the instrument control module controls the relaxation agent automatic adding device to proportionally extract the relaxation agent in step S403.
Subsequently, the instrument control module controls the mixing device to uniformly mix the drilling fluid sample extracted by the quantitative sampling device and the relaxant provided by the relaxant automatic adding device in step S404, so as to obtain a mixed sample.
In step S405, the mixing device transmits the obtained mixed sample to the drilling fluid quantitative detection tube, and stands for a preset time. In this embodiment, the sum of the total time for uniformly mixing the drilling fluid sample and the relaxation agent and the time for transmitting the mixed sample to the drilling fluid quantitative detection tube by the mixing device is the sample injection duration. In different embodiments of the present invention, the sample injection duration is preferably determined according to the sample flow rate, sample inertial navigation volume, and is different for different instruments and instrument applications. In this embodiment, the sample injection duration may be set freely on line by the result analysis module 203, so as to meet the specific use condition of each instrument.
The mixed sample in the drilling fluid quantitative detection tube can be completely polarized in a magnetic field formed by the nuclear magnetic resonance magnet by standing for a preset time (the specific value of the time can be configured into different reasonable values according to actual needs), so that the mixed sample can be better detected, and the maximum detection signal can be obtained.
In this embodiment, after the mixed sample is completely polarized, the instrument control module may control the nmr detection module to perform nmr detection on the mixed sample in step S406, so as to obtain an nmr detection result. Specifically, in this embodiment, the nmr unit obtains the nmr echo signal by performing nmr detection on the mixed sample in step S406, and the nmr spectrum analyzing unit performs spectrum analysis (for example, shaping, amplifying, processing, and calculating the nmr echo signal) on the nmr echo signal to form an nmr detection result.
After the nuclear magnetic resonance detection result is obtained, the nuclear magnetic resonance spectrum analysis unit transmits the nuclear magnetic resonance detection result to the data acquisition and transmission module. The data acquisition and transmission module performs data acquisition on the received nmr detection result in step S407, and transmits the acquired related data to the result analysis module.
In this embodiment, the result analysis module may analyze and calculate the data transmitted by the data acquisition and transmission module in step S408, so as to obtain the nuclear magnetic resonance analysis result. In this embodiment, according to actual needs, the result analysis module can also perform operations such as display, storage, application interpretation and the like on the obtained nuclear magnetic resonance analysis result.
Therefore, the drilling fluid nuclear magnetic resonance online detection system completes a detection process of a detection period.
After one detection period is finished, the drilling fluid nuclear magnetic resonance online detection system can enter the next detection period and continue to perform related detection on the drilling fluid.
In this embodiment, the above steps S406 to S408 of the current detection cycle may be performed during the preparation of the mixed sample in the next detection cycle, which helps to maximally shorten the detection cycle, thereby improving the real-time performance of the detection.
For the tested mixed sample, the drilling fluid nmr online detection system in this embodiment preferably discharges the mixed sample to the mud pit through a pipeline for recycling.
The drilling fluid nuclear magnetic resonance online detection system can realize the quantitative detection of the nuclear magnetic resonance of the drilling fluid, and can detect the oil content of the drilling fluid through the nuclear magnetic resonance, so that the oil content information is provided for the evaluation and the explanation of the oil and gas reservoir. Meanwhile, the system can realize the oil mass detection of the drilling fluid, so that an instrument capable of accurately finding an oil-containing reservoir and detecting the oil content is provided for a reservoir with a low oil-gas ratio. The system can also detect the oil content or the water retention rate in the oil-water mixed liquid, so that the system is also suitable for continuously detecting the oil content or the water retention rate of the produced liquid in the oil extraction process.
Meanwhile, the signal for interfering the detection of the oil content of the drilling fluid cannot appear in the nuclear magnetic resonance detection of the common fluorescent additive for treating the drilling fluid, or the signal for influencing the detection of the oil content of the drilling fluid in the nuclear magnetic resonance detection can be eliminated by adding the relaxant, so that the system is also suitable for the oil content detection under the condition of the fluorescent drilling fluid, and the fluorescent drilling fluid can be treated or not treated by applying the system, so that the drilling time is greatly improved, and the drilling cost is effectively reduced.
The drilling fluid nuclear magnetic resonance online detection system can adopt a split type structure according to actual needs, and the split type structure can effectively reduce the weight and the volume of a single instrument, so that the drilling fluid nuclear magnetic resonance online detection system can better adapt to a field installation environment, and the flexibility, the maintainability and the safety of the instrument are improved. Meanwhile, the split structure is adopted to be installed on the site, and differential detection can be provided, so that the obtained information such as oil-containing information of the reservoir is more real and accurate.
In addition, the online nuclear magnetic resonance detection system for the drilling fluid can more accurately realize the nuclear magnetic resonance detection of the drilling fluid by utilizing the automatic relaxant adding device, and can be widely applied to various complex drilling fluid systems such as oil-based, water-based and fluorescence adding systems.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the foregoing examples have been provided to illustrate the principles of the invention in one or more applications, it will be apparent to those skilled in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (8)
1. An online drilling fluid nuclear magnetic resonance detection system, characterized in that the detection system includes:
the device comprises a drilling fluid pretreatment device, a sampling probe and a cylindrical filtering barrel-shaped device, wherein the drilling fluid pretreatment device is used for filtering solid-phase impurities in the drilling fluid, is arranged in an outlet area where the drilling fluid returns out of a wellhead or an inlet tank area where the drilling fluid circulates into a well on a drilling site, and is realized by adopting the sampling probe with a surface scraper or the cylindrical filtering barrel-shaped device with the filtering device;
the quantitative sample introduction device is connected with the drilling fluid pretreatment device and is used for quantitatively extracting the pretreated drilling fluid to obtain a drilling fluid sample;
the relaxation agent automatic adding device is used for providing a corresponding amount of relaxation agent according to the sampling amount of a drilling fluid sample based on the preset mixing ratio of the relaxation agent and the drilling fluid, and comprises a quantitative pump and a liquid precise flow sensor so as to effectively ensure the quantitative and accurate addition of the relaxation agent;
the mixing device is connected with the quantitative sampling device and the relaxation agent automatic adding device and is used for uniformly mixing the obtained drilling fluid sample and the relaxation agent to obtain a mixed sample for nuclear magnetic resonance analysis;
a nuclear magnetic resonance analyzer connected to the mixing device for performing a nuclear magnetic resonance analysis on the mixed sample, wherein the nuclear magnetic resonance analyzer comprises:
the nuclear magnetic resonance detection module is connected with the mixing device and used for performing nuclear magnetic resonance detection on the drilling fluid sample of the mixed relaxant provided by the mixing device and analyzing and sampling the obtained nuclear magnetic resonance detection signal to obtain a nuclear magnetic resonance detection result;
the data acquisition and transmission module is connected with the nuclear magnetic resonance detection module and is used for acquiring data of the nuclear magnetic resonance detection result and transmitting the acquired data to a corresponding device in communication connection with the nuclear magnetic resonance detection result;
and the result analysis module is in communication connection with the data acquisition and transmission module and is used for analyzing and calculating the data transmitted by the data acquisition and transmission module to obtain a nuclear magnetic resonance analysis result, wherein the nuclear magnetic resonance detection module comprises:
a nuclear magnetic resonance unit connected to the mixing device, the nuclear magnetic resonance unit configured to perform a nuclear magnetic resonance process on the mixed sample to obtain a nuclear magnetic resonance echo signal, the nuclear magnetic resonance unit including:
a nuclear magnetic resonance magnet for forming a detection region of uniform magnetic field intensity at an inner center of an annular columnar structure constituted by the magnet;
the quantitative drilling fluid detection tube is connected with the mixing device and used for placing a quantitative mixed sample in a detection area formed by the nuclear magnetic resonance magnet, the quantitative drilling fluid detection tube is a U-shaped tube, the height of a liquid inlet and a liquid outlet of the quantitative drilling fluid detection tube is higher than that of a tube body at the position of the detection area, and the mixed sample flows into the quantitative drilling fluid detection tube from the liquid inlet or the liquid outlet;
the excitation receiving antenna is used for exciting an electromagnetic signal during nuclear magnetic resonance detection and receiving a nuclear magnetic resonance echo signal of the mixed sample, wherein the nuclear magnetic resonance magnet, the drilling fluid quantitative detection tube and the excitation receiving antenna are arranged in a nuclear magnetic resonance sensor cabinet of the nuclear magnetic resonance detection module;
a nuclear magnetic resonance spectrum analysis unit connected with the nuclear magnetic resonance unit and used for performing spectrum analysis on the nuclear magnetic resonance echo signal to obtain the nuclear magnetic resonance detection result, wherein the nuclear magnetic resonance spectrum analysis unit is arranged in a pressurization explosion-proof main control cabinet of the nuclear magnetic resonance detection module,
the excitation receiving antenna of the drilling fluid quantitative detection tube in the nuclear magnetic resonance sensing machine case is connected with the sensor radio-frequency antenna, the sensor radio-frequency antenna is connected with the nuclear magnetic resonance spectrometer radio-frequency antenna outside the nuclear magnetic resonance sensing machine case, the nuclear magnetic resonance spectrum analysis unit in the pressurization explosion-proof main control machine case is connected with the nuclear magnetic resonance spectrometer radio-frequency antenna, and therefore the nuclear magnetic resonance unit is in communication connection with the nuclear magnetic resonance spectrum analysis unit through the radio-frequency antenna.
2. The detection system of claim 1, wherein the drilling fluid pretreatment device is disposed at the front end of the sampling tube for filtering solid phase impurities in the drilling fluid.
3. The detection system of claim 1, wherein the fixed-volume sample introduction device comprises a fixed-volume pump configured to draw a fixed volume of drilling fluid per unit time.
4. The detection system according to any one of claims 1 to 3, wherein the NMR analyzer is connected to the quantitative sample injection device and/or the relaxant automatic addition device, and is configured to control an operation state of the quantitative sample injection device and a sample amount of the provided drilling fluid sample and/or control an operation state of the relaxant automatic addition device and an addition amount of the provided relaxant.
5. The detection system of claim 1, wherein the nuclear magnetic resonance analyzer further comprises:
and the instrument control module is connected with the nuclear magnetic resonance detection module and is used for controlling the running state of the nuclear magnetic resonance detection module.
6. The detection system according to claim 5, wherein the instrument control module is further connected to the quantitative sampling device and/or the relaxation agent automatic adding device, and is configured to control an operation state of the quantitative sampling device and/or the relaxation agent automatic adding device.
7. The detection system of claim 1, wherein the nmr magnet is secured to the nmr sensor housing by a magnet mounting bracket.
8. The detection system according to claim 7, wherein a thermostat is further disposed in the nmr sensor housing, and the thermostat is configured to stabilize a temperature in the nmr sensor housing, so as to ensure a stable resonant frequency of the detection magnet.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017111935A1 (en) * | 2015-12-22 | 2017-06-29 | Halliburton Energy Services, Inc. | Selective nmr pulse for downhole measurements |
| CN107916928A (en) * | 2016-10-08 | 2018-04-17 | 中国石油化工股份有限公司 | With brill fluid analyser |
Family Cites Families (3)
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| CN101793147B (en) * | 2010-03-24 | 2012-10-10 | 苏州纽迈电子科技有限公司 | Online nuclear magnetic resonance type analysis and detection device of oil content of drilling fluid |
| CN105223221B (en) * | 2015-10-22 | 2017-08-15 | 苏州纽迈分析仪器股份有限公司 | A kind of method of low-field nuclear magnetic resonance measurement oil content of drilling fluid rate and moisture content |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107916928A (en) * | 2016-10-08 | 2018-04-17 | 中国石油化工股份有限公司 | With brill fluid analyser |
Non-Patent Citations (2)
| Title |
|---|
| 新型钻井液气测录井系统的设计开发;张卫等;《石油机械》(第11期);全文 * |
| 核磁共振录井技术现场实践与应用;白明明等;《石化技术》(第06期);全文 * |
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