CN106896212B - Monitor the device of deepwater drilling liquid invasion procedure hydrate reservoir physical property variation - Google Patents
Monitor the device of deepwater drilling liquid invasion procedure hydrate reservoir physical property variation Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention relates to a kind of devices of monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property variation, comprising: pit shaft-hydrate reservoir coupled heat and mass transfer unit and circulation of drilling fluid unit；Pit shaft-hydrate reservoir coupled heat and mass transfer unit simulates reservoir structure by the method that back-up sand is compacted, reacting environment is provided for the generation, decomposition and regeneration of Hydrate in Porous Medium, and using the various monitoring measures including temperature and pressure sensing, electrical impedance sensing, monitoring ultrasonic, TDR monitoring and nuclear magnetic resonance tracking isotope, the physical parameter variation of different location in reservoir is recorded in real time；Circulation of drilling fluid unit is used to simulate the circulation of drilling fluid of different drilling parameters；The device can simulate the hydrate reservoir under the conditions of different water depth, during mud filtrate invasion, reservoir internal temperature when monitoring pit shaft-reservoir heat and mass, pressure, electrical impedance variation and decompose the Transports of the substances such as fluid, original solid phase hydration object.
Description
Technical field
The invention belongs to natural petroleum gas field fields, and in particular, to a kind of monitoring deepwater drilling liquid invasion procedure water
The device for closing object reservoir change, for observing and analyzing the internal act of mud filtrate invasion hydrate reservoir under different condition
Dynamic change, so that summary and induction goes out corresponding rule.
Background technique
Hydrate is a kind of cagelike structure complex compound, usually by small molecule hydrocarbon (such as methane, ethane, propane, normal butane)
It is formed with hydrone.It has many advantages, such as that rich reserves, widely distributed, energy density is high and post-combustion pollution is small, is considered as
Future can replace the clean energy resource of conventional fossil fuel, receive pursuing and paying close attention to for countries in the world.Many countries are all first
After carried out gas hydrates pilot production project, but the only former Soviet Union in the pilot production of Messoyakha field has considerable quotient at present
Industry benefit.
The main preservation of gas hydrates in nature is in deep water stratum and continental shelf frozen soil layer.Exceedingly odious
Environment brings various difficulties to exploitation engineering, and to technical staff and corollary equipment, more stringent requirements are proposed.In addition to storm,
The influence of the factors such as shake and stormy waves stream, hydrate itself is also the weight for needing to overcome in engineering to temperature, the sensibility of pressure
Hang-up.The decomposition of hydrate and regeneration frequently can lead to the things such as formation collapse, borehole well instability, well kick blowout, line clogging
Therefore influence normally to produce, endanger the safety of personnel and equipment.
Drilling well is the necessary means of the recovery of subterranean energy.When drilling fluid invades reservoir in cyclic process, meeting and reservoir
Heat and mass occurs.Different from conventional reservoir, after absorbing certain energy, temperature can be gradually increasing until being more than hydrate reservoir
Hydrate phase balance curve decomposes heat absorption and generates a large amount of gas and water.And the fluid generated can be spread under partial pressure differential effect,
It hinders drilling fluid to flow to reservoir depths, if there is suitable temperature, pressure, can also regenerate hydrate solids particle, change
Reservoir properties.The process contains the interaction between drilling fluid and reservoir, has been related to multiple variable parameters, relatively multiple
It is miscellaneous.Once control is improper, a series of geology disaster can be caused, cause the loss for being difficult to retrieve.
Currently, experimental study of the domestic and foreign scholars in hydrate field is concentrated mainly on the generation of simulating hydrate and divides
Solution, probes into the phase balance condition under hydrate varying environment.And the research of heat and mass is still immature in hydrate reservoir, to brill
The understanding that well liquid invades the behavior dynamic law after hydrate reservoir is even more near barren.
For above situation, it is necessary to design a set of can monitor indoors and analyze mud filtrate invasion process under deepwater environment
The device of middle hydrate reservoir physical property variation is saturated by changing drilling fluid temperature, wellbore pressure, reservoir porosity, hydrate
The corresponding data of gain of parameter such as degree go out corresponding rule with summary and induction, to provide optimization side for deep water drilling hydrate
The theoretical foundation of case and forecasting risk ensures the safety of field operation.
Summary of the invention
To fill up current technological gap, the present invention provides a kind of for simulating mud filtrate invasion hydrate storage under deepwater environment
Layer, and by changing drilling fluid temperature, wellbore pressure, reservoir porosity, hydrate concentration, reservoir initial temperature and pressure etc.
Parameter analyzes the device of related law, decomposes to avoid drilling fluid to cause hydrate mass during deep water drilling hydrate
The theoretical foundation of accident offer prioritization scheme and forecasting risk.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
Monitor the device of deepwater drilling liquid invasion procedure hydrate reservoir physical property variation, comprising: pit shaft-hydrate reservoir coupling
Close heat and mass unit and circulation of drilling fluid unit；Pit shaft-hydrate reservoir coupled heat and mass transfer unit is compacted by back-up sand
Method simulate reservoir structure, be Hydrate in Porous Medium generation and hydrate under the conditions of mud filtrate invasion decomposition with again
It generates and reacting environment is provided, and using including temperature pressure sensing, electrical impedance sensing, monitoring ultrasonic, TDR monitoring and nuclear-magnetism
Various monitoring measures including resonance tracking isotope record the physical parameter variation of different location in reservoir in real time；Drilling fluid
Cycling element is used to simulate the circulation of drilling fluid of different drilling parameters, and utilizes the difference metering intrusion drilling well of circulation front and back flowmeter
Liquid measure；The device can simulate the hydrate reservoir under the conditions of different water depth, by the feelings of different work parameter mud filtrate invasion
Condition monitors in pit shaft-reservoir heat and mass transfer process, reservoir internal temperature, pressure, electrical impedance variation and decompose fluid, original
The Transport of the predetermined substances such as solid phase hydration object.
Compared with the existing technology, beneficial effects of the present invention are as follows:
1, different location in reservoir can be monitored by temperature, pressure, sound wave, electromagnetic wave, electrical impedance multiple means
Physical parameter is mutually authenticated with the variation of mud filtrate invasion, data accuracy and reliability is improved, to analyze corresponding behavior
Dynamic law；
2, the hole of simulation reservoir can be changed by changing the partial size of filling sandstone and injecting the gas-liquid ratio of sandstone
The saturation degree of degree and hydrate, analyzes its influence to mud filtrate invasion reservoir behavior dynamic law；
3, it can be invaded by changing the salinity of drilling fluid, temperature, recycling discharge capacity and wellbore pressure to analyze it to drilling fluid
Enter the influence of reservoir behavior dynamic law；
4, can be by changing the labelled element in injection gas and liquid, the hydrocarbon oxygen including H3, C14, O20 is put
Injectivity isotope, during tracking mud filtrate invasion reservoir, the decomposition situation of different hydrates and the diffusion feelings for decomposing fluid
Condition；
5, can be by the environment temperature and environmental pressure of change experimental system, drilling fluid is invaded under the conditions of simulating different water depth
The case where entering hydrate reservoir；
6, pit shaft part and reservoir portion can be dielectrically separated from before circulation of drilling fluid, avoids influencing each other,
It is more close with on-site actual situations.
Detailed description of the invention
Fig. 1 is the schematic diagram for monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property changeable device；
Fig. 2 is distribution schematic diagram of the same group of comprehensive sensor on vertical section；
Fig. 3 is connection schematic diagram between insulation insulation flashboard and horizontal straight tube tubing string；
In figure: 101, vertical straight tube tubing string, 102, horizontal straight tube tubing string, 103, horizontal straight tube tubing string lid plug, 201, synthesis
Sensor, 202, NMR system, 203, ultrasonic atomization probe, 204, coaxial type TDR probe, 301, first flowmeter,
302, second flowmeter, 303, first pressure gauge, 304, second pressure gauge, 305, third pressure gauge, the 306, first thermometer,
307, second temperature table, 308, third thermometer, 401, mud pit, 402, controllable heater, 403, high pressure reciprocation cycle pump,
404, back-pressure valve, 501, controllable telescopic pipe, 502, insulation insulation flashboard, 503, gas-liquid mixed supplying module.
Specific embodiment
As shown in Figure 1, the device of monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property variation, comprising: pit shaft-water
Close object reservoir coupled heat and mass transfer unit and circulation of drilling fluid unit；Pit shaft-hydrate reservoir coupled heat and mass transfer unit is logical
The method simulation reservoir structure of back-up sand compacting is crossed, for hydrate under the conditions of the generation of Hydrate in Porous Medium and mud filtrate invasion
Decomposition and regeneration provide reacting environment, and using include temperature pressure sensing, electrical impedance sensing, monitoring ultrasonic, TDR prison
Various monitoring measures including survey and nuclear magnetic resonance tracking isotope, the physical parameter for recording different location in reservoir in real time become
Change；Circulation of drilling fluid unit is used to simulate the circulation of drilling fluid of different drilling parameters, and utilizes the difference meter of circulation front and back flowmeter
Amount intrusion drilling well liquid measure；The device can simulate the hydrate reservoir under the conditions of different water depth, by different work parameter drilling well
The case where liquid invades monitors in pit shaft-reservoir heat and mass transfer process, the variation and decomposition of reservoir internal temperature, pressure, electrical impedance
The Transport of the predetermined substances such as fluid, original solid phase hydration object.
Pit shaft-hydrate reservoir coupled heat and mass transfer unit, comprising: vertical straight tube tubing string 101, horizontal straight tube tubing string 102,
Horizontal straight tube tubing string lid plug 103；Wherein, vertical straight tube tubing string 101 is using round tubing string, vertical placement, horizontal straight tube tubing string 102
It using round tubing string, is horizontally arranged, vertical straight tube tubing string 101, horizontal straight tube tubing string 102 are fixedly connected, vertical straight tube tubing string 101
It is in 90 ° of angles between horizontal straight tube tubing string 102, vertical straight tube tubing string 101 is divided by horizontal straight tube tubing string 102 for upper and lower two-section；
Horizontal straight tube tubing string 102 uses compacting back-up sand, changes reservoir porosity by adjusting gravel size, for simulating and pit shaft
It is connected in the middle part of the one-dimensional hydrate reservoir of the radial direction of contact, one end and vertical straight tube tubing string 101, the other end is by horizontal straight tube tubing string
Lid plug 103 blocks, and a length of L of horizontal straight tube tubing string 102, internal diameter D, vertical straight tube tubing string 101 is for simulating circulation of drilling fluid mistake
The pit shaft of Cheng Zhongyu reservoir contact.
Horizontal straight tube tubing string 102 equidistantly uniformly installs totally 20 groups of comprehensive sensors 201 along horizontal axis direction, and every group comprehensive
Closing sensor 201 includes 4 probes positioned at same perpendicular, and every probe is disposed radially, and every group of 4 probes are mutual
Be distributed in horizontal 102 vertical section of straight tube tubing string in 90 °, two be vertically arranged, two it is horizontally disposed；It is carried on every probe
2 groups of probes, 2 groups of probes are respectively apart from horizontal straight tube tubing string 102 inner tubal wall D/5,2D/5, the temperature of every group of probe monitors present position
Degree, pressure, electrical impedance；201 outer end of comprehensive sensor is equipped with NMR system 202, is centered around horizontal 102 whole body of straight tube tubing string
Outside, for tracking Diffusion Law of the specific isotope in reservoir.
It is equipped with and is longer than in horizontal straight tube tubing string 102 vertically close to vertical 101 position of straight tube tubing string on horizontal straight tube tubing string 102
The slideway of diameter, the interior setting controllable telescopic pipe 501 of slideway and insulation insulation flashboard 502；Wherein controllable telescopic pipe 501 and insulation are insulated
Flashboard 502 is rigidly connected, the driving insulation insulation complete pair of vertical straight tube tubing string 101 of flashboard 502 of controllable telescopic pipe 501 and level
Envelope between straight tube tubing string 102 is cut；Insulation insulation flashboard 502 is located inside slideway, and controllable using being insulated insulating rigid material
501 connecting portion of telescoping tube is in T shape, forms dynamic sealing with slideway.
Horizontal straight tube tubing string lid plug 103 uses high pressure resistant cylindrical body, same to be diametrically equipped at two at the D/6 of the center of circle
Flowing ports, for providing fluid Vomitory for horizontal straight tube tubing string 102；Third pressure is separately installed at two in flowing ports
Power table 305 and third thermometer 308, measurement enters and leaves the temperature and pressure of horizontal 102 fluid of straight tube tubing string respectively；End is flowed at two
Mouth is connected by the first insulation pipeline with gas-liquid mixed feed unit 503, for providing sufficient gas for horizontal straight tube tubing string 102
Liquid fluid-mixing is to generate hydrate.
Horizontal 103 inner end the center point of straight tube tubing string lid plug is equipped with coaxial TDR sensing seat, be equipped on sensing seat five groups it is coaxial
TDR probe 204, five groups of coaxial TDR probes 204 long L/6,2L/6,3L/6,4L/6,5L/6 respectively, five groups of coaxial TDR probes 204
It is horizontally fixed on middle line, horizontal straight tube tubing string 102 is equidistantly divided into six parts, it is full for testing hydrate in different zones
With the variation of degree and moisture content, mud filtrate invasion state is analyzed；Horizontal straight tube tubing string lid plug 103 is equipped with ultrasound close to the center point
Wave atomization probe 203, the variation for hydrate concentration and moisture content in testing level straight tube tubing string 102.
Circulation of drilling fluid unit, comprising: mud pit 401, high pressure reciprocation cycle pump 402, controllable heater 403 and back-pressure valve
404；Mud pit 401 is connected by the first insulation feed-line with vertical 101 upper port of straight tube tubing string, the first insulation feed-line
On from mud pit 401 to vertical 101 upper port of straight tube tubing string be sequentially arranged with first flowmeter 302, high pressure reciprocation cycle pump 402,
Controllable heater 403, first pressure gauge 303, the first thermometer 306；Vertical 101 lower port of straight tube tubing string is defeated by the second insulation
Send pipeline to be connected with mud pit 401, second insulation feed-line on from vertical 101 lower port of straight tube tubing string to mud pit 401 according to
It is secondary that back-pressure valve 404, second pressure gauge 304, second temperature table 307, second flowmeter 302 are housed；Mud pit 401 fills enough
The drilling fluid of specified ionic species and concentration；High pressure reciprocation cycle pump 402 regulates and controls simultaneously for providing power for circulation of drilling fluid
Recycle discharge capacity；Controllable heater 403 is for regulating and controlling the temperature of drilling fluid；Back-pressure valve 404 is used to during circulation of drilling fluid
Pressure in vertical straight tube tubing string 101；First flowmeter 302 and second flowmeter 302 are respectively used to measurement and flow in and out vertically
The mud flow rate of straight tube tubing string 101；First pressure gauge 303 and second pressure gauge 304 are respectively used to measure vertical straight tube tubing string
The real-time pressure of 101 upper ports and lower port；First thermometer 306 and second temperature table 307 are respectively used to measurement and flow into and flow
The drilling fluid real time temperature of vertical straight tube tubing string 101 out.
One layer of insulating materials of coaxial type TDR probe 204 outside hot compress, can reduce when electromagnetic wave is propagated in the medium
Loss enhances transmission capacity, reduces error, to keep measurement result more accurate.
The distribution such as Fig. 2 of 8 groups of probes on the same vertical section of horizontal straight tube tubing string 102 in every group of comprehensive sensor 201
It is shown.
Controllable telescopic pipe 502 and insulation insulation flashboard 503 are as shown in Figure 3 in the installation of horizontal 102 sliding way of straight tube tubing string.
The method for monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property dynamic rule, it is deep using above-mentioned monitoring
The device of aqueous drilling fluid invasion procedure hydrate reservoir physical property variation, the specific steps are that:
(1) back-up sand gas injection liquid, cooling pressurization simulating hydrate reservoir
Controllable telescopic pipe 501 is driven, insulation insulation flashboard 502 is pushed into horizontal 102 bottom of straight tube tubing string, by vertical straight tube
Tubing string 101 and the packing completely of horizontal straight tube tubing string 102 are got up.
Horizontal straight tube tubing string lid plug 103 is unloaded, selects sandstone type and partial size according to preset reservoir matrix and porosity,
The back-up sand into horizontal straight tube tubing string 102 installs horizontal straight tube tubing string lid plug 103, then by horizontal straight tube tubing string 102 until spilling
Inside vacuumizes.
It is that horizontal straight tube tubing string 102 freezes with immersion method, until temperature data and third temperature that comprehensive sensor 201 obtains
Spending table 308, readings are consistent, reaches preset value and stablizes constant.
Needed for being configured according to preset gaseous species, class of liquids and mixed proportion in gas-liquid mixed feed unit 503
Fluid, and injected into horizontal straight tube tubing string 102, until pressure data and third pressure gauge 305 that comprehensive sensor 201 obtains
Readings are consistent, reaches preset value and stablizes constant, thinks in porous media that hydrate has reached at this time and balance each other under this condition, root
Hydrate concentration in reservoir can be estimated according to the consumption of fluid in gas-liquid mixed feed unit 503.
(2) circulating fluid, simulation intrusion reservoir heat and mass
Open and be arranged high pressure reciprocation cycle pump 402 and controllable heater 403, by mud pit 401 according to default ion
The drilling fluid of type and concentration configuration, injects in vertical straight tube tubing string 101 according to preset circulation discharge capacity and temperature.Adjust back pressure
Valve 404, it is constant for preset value to control pressure in vertical straight tube tubing string 101 and horizontal straight tube tubing string 102.
Second pressure gauge 304 and second temperature table 307 are observed, when reading reaches preset value and stablizes constant, driving can
Telescoping tube 501 is controlled, insulation insulation flashboard 502 is pulled up, until vertical straight tube tubing string 101 and horizontal straight tube tubing string 102 connect completely
It is logical, start simulation loop mud filtrate invasion hydrate reservoir at this time.
(3) reservoir change is monitored, mud filtrate invasion dynamic law is analyzed
Acquire comprehensive sensor 201, NMR system 202, ultrasonic atomization probe 203, coaxial type TDR probe 204,
First flowmeter 301, second flowmeter 302, first pressure gauge 303, second pressure gauge 304, first the 306, second temperature of thermometer
The live signal of table 307 is spent, and converts corresponding data for these signals and carries out processing analysis.
Wherein, what comprehensive sensor 201 recorded is the temperature, pressure, electrical impedance of reservoir different location, and reflection drilling fluid is invaded
Reservoir temperature field, pressure field and electrical impedance field are changed with time under the conditions of entering.
NMR system 202 is tracked and what is recorded is the motion profile for presetting radioactive element place substance, and reflection is bored
Under the conditions of well liquid intrusion in reservoir certain original predetermined substance bent by decomposition of hydrate, secondary generation and drilling fluid replace influenced and
The Transport of generation.When occurring physically or chemically to react in reservoir, default radioactive element can be from original place substance
It is transformed into new substance, monitors its real-time location status, may infer that reservoir internal dynamic and reaction progress.It is quasi- to be promoted
Exactness once only marks a kind of radioactive element.
203 record of ultrasonic atomization probe is that different frequency sound wave is turned back the time used, reflects hydrate in reservoir
Saturation degree and moisture content.
What coaxial type TDR probe 204 recorded is the waveform diagram obtained after reflection of electromagnetic wave, to calculate different positions in reservoir
The dielectric constant set reflects hydrate concentration and moisture content in reservoir, is mutually authenticated with ultrasonic atomization probe 203, thus
Correct error.
What first flowmeter 301 recorded is the flow that drilling fluid enters vertical straight tube tubing string 101, and second flowmeter 302 is remembered
What is recorded is the flow that drilling fluid flows out vertical straight tube tubing string 101, can be counted by first flowmeter 301 and second flowmeter 302
Calculate total filter loss of mud filtrate invasion reservoir.
First pressure gauge 303 and the first thermometer 306 record be drilling fluid flow out vertical straight tube tubing string 101 pressure and
What temperature, second pressure gauge 304 and second temperature table 307 recorded is the pressure and temperature that drilling fluid enters vertical straight tube tubing string 102
Degree, by first pressure gauge 303, second pressure gauge 304, the first thermometer 306, second temperature table 307 can estimate drilling well
Liquid passes to the gross energy of reservoir.
By changing the sandstone type for being packed into horizontal straight tube tubing string 102, partial size respectively, multi-pass operation, research storage are carried out
The influence of layer type and initial porosity to mud filtrate invasion hydrate reservoir behavior dynamic law.
By changing the gas-liquid mixed ratio in gas-liquid mixed feed unit 503, multi-pass operation, water in Study In Reservoir are carried out
Close the influence of object saturation degree, void fraction, moisture content to mud filtrate invasion hydrate reservoir behavior dynamic law.
By changing, carbon isotope (such as C14), adjustment nuclear-magnetism are total in gas molecule in gas-liquid mixed feed unit 503
The reception frequency of vibrating system 202 carries out real-time tracing to the carbon isotope, and decomposition of hydrate generates the expansion of gas in Study In Reservoir
Dissipate rule.
By changing, protium isotope (such as H3), adjustment nuclear-magnetism are total in fluid molecule in gas-liquid mixed feed unit 503
The reception frequency of vibrating system 202 carries out real-time tracing to the hydrogen isotope, and decomposition of hydrate generates the expansion of liquid in Study In Reservoir
Dissipate rule.
By adjusting and reforming the environment temperature and pressure of the horizontal straight tube tubing string 102 of change, carry out multi-pass operation, research different water depth and
Mud filtrate invasion hydrate reservoir behavior dynamic law under water temperature.
By adjusting high pressure reciprocation cycle pump 402 and controllable heater 403, change the discharge capacity and temperature of circulating fluid respectively
Degree carries out multi-pass operation, studies mud filtrate invasion hydrate reservoir behavior dynamic law under different drilling conditions.
By changing the ionic species and concentration of drilling fluid in mud pit 401 respectively, multi-pass operation is carried out, different brills are studied
Well liquid ionic species and concentration are to mud filtrate invasion hydrate reservoir behavior dynamic law.
Claims (2)
1. a kind of method for monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property dynamic rule, which is characterized in that
Using the device of monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property variation, monitoring deepwater drilling liquid invasion procedure hydration
The device of object reservoir change includes: pit shaft-hydrate reservoir coupled heat and mass transfer unit and circulation of drilling fluid unit；Well
Cylinder-hydrate reservoir coupled heat and mass transfer unit simulates reservoir structure by the method that back-up sand is compacted, and closes for Water in Porous Medium
The decomposition of hydrate and regeneration provide reacting environment under the conditions of the generation of object and mud filtrate invasion, and using including temperature, pressure
Various monitoring measures including sensing, electrical impedance sensing, monitoring ultrasonic, TDR monitoring and nuclear magnetic resonance tracking isotope, it is real
The physical parameter variation of different location in Shi Jilu reservoir；Circulation of drilling fluid unit is used to simulate the drilling fluid of different drilling parameters
Circulation, and utilize the difference metering intrusion drilling well liquid measure of circulation front and back flowmeter；Wherein, pit shaft-hydrate reservoir Coupled Heat Transfer passes
Matter unit includes vertical straight tube tubing string, horizontal straight tube tubing string, horizontal straight tube tubing string lid plug, close to vertical straight on horizontal straight tube tubing string
Bobbin column position sets the slideway for being longer than horizontal straight tube tubing string internal diameter vertically, the rigidly connected controllable telescopic pipe of setting and absolutely in slideway
Thermal insulation flashboard, between the controllable telescopic pipe driving insulation insulation complete pair of vertical straight tube tubing string of flashboard and horizontal straight tube tubing string
Envelope is cut；Horizontal straight tube tubing string equidistantly uniformly installs comprehensive sensor along horizontal axis direction；The method specific steps are as follows:
(1) back-up sand gas injection liquid, cooling pressurization simulating hydrate reservoir
Controllable telescopic pipe is driven, insulation insulation flashboard is pushed into horizontal straight tube tubing string bottom, vertical straight tube tubing string and level is straight
Bobbin column insulates completely；
Horizontal straight tube tubing string lid plug is unloaded, according to preset reservoir matrix and porosity selection sandstone type and partial size, Xiang Shuiping
Back-up sand in straight tube tubing string is installed horizontal straight tube tubing string lid plug, will then be vacuumized inside horizontal straight tube tubing string until spilling；
It is horizontal straight tube tubing string refrigeration with immersion method, until the reading of temperature data and third thermometer that comprehensive sensor obtains
Unanimously, reach preset value and stablize constant；
Fluid needed for being configured according to preset gaseous species, class of liquids and mixed proportion in gas-liquid mixed feed unit, and
It is injected into horizontal straight tube tubing string, until the pressure data that comprehensive sensor obtains is consistent with third pressure gauge reading, reaches pre-
If value is simultaneously stablized constant, thinks in porous media that hydrate has reached at this time and balance each other under this condition, supplied according to gas-liquid mixed
The consumption of fluid can estimate hydrate concentration in reservoir in unit；
(2) circulating fluid, simulation intrusion reservoir heat and mass
High pressure reciprocation cycle pump and controllable heater are opened and be arranged, will be configured in mud pit according to default ionic species and concentration
Drilling fluid, injected in vertical straight tube tubing string according to preset circulation discharge capacity and temperature；Back-pressure valve is adjusted, to control vertical straight tube
It is preset value that pressure is constant in tubing string and horizontal straight tube tubing string；
Second pressure gauge and second temperature table are observed, when reading reaches preset value and stablizes constant, drives controllable telescopic pipe, it will
Insulation insulation flashboard pull-up starts simulation loop drilling well until vertical straight tube tubing string is connected to completely with horizontal straight tube tubing string at this time
Liquid invades hydrate reservoir；
(3) reservoir change is monitored, mud filtrate invasion dynamic law is analyzed
Acquire comprehensive sensor, NMR system, ultrasonic atomization probe, coaxial type TDR probe, first flowmeter, second
Flowmeter, first pressure gauge, second pressure gauge, the first thermometer, second temperature table live signal, and these signals are converted
Processing analysis is carried out for corresponding data；
Wherein, what comprehensive sensor recorded is the temperature, pressure, electrical impedance of reservoir different location, reflects mud filtrate invasion condition
Lower reservoir temperature field, pressure field and electrical impedance field are changed with time；
NMR system is tracked and what is recorded is the motion profile for presetting radioactive element place substance, reflects mud filtrate invasion
Under the conditions of in reservoir certain original predetermined substance bent to replace by decomposition of hydrate, secondary generation and drilling fluid and influenced and what is occurred moves
Move rule；When occurring physically or chemically to react in reservoir, default radioactive element can be transformed into newly from original place substance
Substance in, monitor its real-time location status, may infer that reservoir internal dynamic and reaction progress；For promoted accuracy, one
It is secondary only to mark a kind of radioactive element；
Ultrasonic atomization probes records are that different frequency sound wave is turned back the time used, reflect in reservoir hydrate concentration and
Moisture content；
Coaxial type TDR probe records are the waveform diagrams obtained after reflection of electromagnetic wave, to calculate Jie of different location in reservoir
Electric constant reflects hydrate concentration and moisture content in reservoir, is mutually authenticated with ultrasonic atomization probe, to correct error；
First flowmeter record is flow of the drilling fluid into vertical straight tube tubing string, and second flowmeter record is drilling well liquid stream
The flow of vertical straight tube tubing string out can calculate total filter of mud filtrate invasion reservoir by first flowmeter and second flowmeter
Vector；
What first pressure gauge and the first thermometer recorded is the pressure and temperature that drilling fluid flows out vertical straight tube tubing string, second pressure
What table and second temperature table recorded is the pressure and temperature that drilling fluid enters vertical straight tube tubing string, passes through first pressure gauge, second
Pressure gauge, the first thermometer, second temperature table can estimate the gross energy that drilling fluid passes to reservoir.
2. the side of monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property dynamic rule according to claim 1
Method, it is characterised in that:
By changing the sandstone type for being packed into horizontal straight tube tubing string, partial size respectively, carry out multi-pass operation, Study In Reservoir type with
Influence of the initial porosity to mud filtrate invasion hydrate reservoir behavior dynamic law；
By changing the gas-liquid mixed ratio in gas-liquid mixed feed unit, multi-pass operation is carried out, hydrate is full in Study In Reservoir
Influence with degree, void fraction, moisture content to mud filtrate invasion hydrate reservoir behavior dynamic law；
By carbon isotope in gas molecule in change gas-liquid mixed feed unit, the reception frequency of NMR system is adjusted
Rate carries out real-time tracing to the carbon isotope, and decomposition of hydrate generates the Diffusion Law of gas in Study In Reservoir；
By protium isotope in fluid molecule in change gas-liquid mixed feed unit, the reception frequency of NMR system is adjusted
Rate carries out real-time tracing to the hydrogen isotope, and decomposition of hydrate generates the Diffusion Law of liquid in Study In Reservoir；
By adjusting and reforming the environment temperature and pressure of the horizontal straight tube tubing string of change, multi-pass operation is carried out, is studied under different water depth and water temperature
Mud filtrate invasion hydrate reservoir behavior dynamic law；
By adjusting high pressure reciprocation cycle pump and controllable heater, change the discharge capacity and temperature of circulating fluid respectively, carries out more
Mud filtrate invasion hydrate reservoir behavior dynamic law under different drilling conditions is studied in secondary operation；
By changing the ionic species and concentration of drilling fluid in mud pit respectively, carry out multi-pass operation, study different drilling fluids from
Subcategory and concentration are to mud filtrate invasion hydrate reservoir behavior dynamic law.
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