CN110454146A - The device and method to shake out in horizontal well with sand control in evaluation hydrate recovery process - Google Patents

The device and method to shake out in horizontal well with sand control in evaluation hydrate recovery process Download PDF

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Publication number
CN110454146A
CN110454146A CN201910703877.XA CN201910703877A CN110454146A CN 110454146 A CN110454146 A CN 110454146A CN 201910703877 A CN201910703877 A CN 201910703877A CN 110454146 A CN110454146 A CN 110454146A
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gas
autoclave
hydrate
valve
sand
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宁伏龙
方翔宇
王林杰
王冬冬
刘志超
胡维
刘志辉
欧文佳
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China University of Geosciences
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China University of Geosciences
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/08Screens or liners
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The present invention discloses the device and method to shake out in horizontal well with sand control in evaluation hydrate recovery process, its device includes autoclave, high/low temperature insulating box, hydrate sample preparation system, control pressurer system, gas-liquid solid separation system and data acquisition system, high/low temperature insulating box is used to control the temperature in autoclave, rigid pipe through its side wall is installed in the middle part of autoclave, rigid pipe is used to simulate the horizontal well for carrying out hydrate exploitation, gas-liquid solid separation system is for collecting the gas generated in experimentation, liquid and solid, hydrate sample preparation system is used to prepare sample containing hydrate sediment, control pressurer system is used to control axis pressure and back pressure in autoclave, it the advantage is that, the Sanding Mechanism under different geological environments and mining method in horizontal wellbore can be differentiated by the device and method, and The sand controlling result of different size sand control screen is evaluated, experimental provision structure is simple, easy to operate, and experimental method repeatability is strong.

Description

The device and method to shake out in horizontal well with sand control in evaluation hydrate recovery process
Technical field
The present invention relates in natural gas hydrate exploration and development technique field, more particularly to evaluation hydrate recovery process The device and method to be shaked out in horizontal well with sand control.
Background technique
Gas hydrates are formed under high pressure low temperature by natural gas and water like ice-like solid, and combustible ice is commonly called as, It is big to be distributed wide, rich reserves, energy density, is a kind of novel alternative energy source of cleaning.It is estimated that existing in the form of hydrates Carbon is with twice of carbon total amount existing for fossil fuel on the earth, therefore many countries are all regarded as the following novel substitution energy Source, China are also incorporated medium & long term sci-tech development program.
In drilling well, complete well and the gas production process that gas hydrates are developed, Container Rock Sanding is that influence hydrate is efficient for a long time One of main security risk of exploitation, shaking out is that reservoir sand grains is migrated from reservoir showing of coming out with fluid during oil-gas mining As.Canada Mallik tries recovery well, the Alaska of the U.S. in 2012 Ignik Sikumi scene CO within 20072Replacement exploitation water Close the first of object test well, the Japan whole world in 2013 second of pilot production of ocean hydrate examination recovery well and Japan in 2017 for the first time All there is serious problem of shaking out in mouth well, and greatly affected gas producing efficiency, even results in pilot production and have to terminate in advance.In The hydrate of state's South China Sea is with a scattered manner or weak cementation method is filled in argillaceous sediment hole, in decomposition of hydrate mistake Serious problem of shaking out may be faced in journey, therefore studies shaking out in hydrate recovery process and China is passed through with sand control problem Efficient Development deep sea hydrate resource of helping has realistic meaning.
Currently, it is less using the device of Sanding Mechanism and sand controlling result in laboratory facilities research hydrate recovery process, and The phenomenon of shaking out being concentrated mainly in vertical pit shaft does not have there is no being studied for the Sanding Mechanism in horizontal wellbore yet Sand controlling result after installing different size sand control sieve to horizontal wellbore is studied.With hydrate be commercialized Exploitation research into The continuous propulsion of journey, horizontal well technology can be increasingly being applied to hydrate exploitation, China also will using horizontal well technology into Second of the runin of row hydrate is adopted, thus develop can simulate it is horizontal under the conditions of different geological conditions, different mining method Situation of shaking out in well, and then evaluate the Sanding Mechanism in hydrate recovery process in horizontal well and the different sand screen nets of installation Sand controlling result afterwards is particularly important.
Summary of the invention
It is an object of the invention to be directed to the existing state of the art, provide in evaluation hydrate recovery process to go out in horizontal well The device and method of sand and sand control can differentiate horizontal wellbore under different geological environments and mining method by the device and method Interior Sanding Mechanism, and the sand controlling result of different size sand control screen is evaluated, experimental provision structure is simple, easy to operate, experiment Method repeatability is strong.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
Shaking out in horizontal well with the device of sand control in evaluation hydrate recovery process includes autoclave, high/low temperature constant temperature Case, hydrate sample preparation system, control pressurer system, gas-liquid solid separation system and data acquisition system, hydrate sample system Standby system, control pressurer system, gas-liquid solid separation system and data acquisition system are connect with autoclave;The high pressure is anti- Kettle is answered to be arranged in high/low temperature insulating box, high/low temperature insulating box is used to control the temperature in autoclave, thus simulated sea bottom The temperature environment of hydrate reservoir;Rigid pipe through its side wall is installed, rigid pipe is level in the middle part of the autoclave State, for simulating the horizontal well for carrying out hydrate exploitation, one end of rigid pipe is located in autoclave, rigid pipe it is another End is located in high/low temperature insulating box, rigid pipe be located at one end in autoclave be equipped with equidistant aperture and outer layer be equipped with it is anti- Sand sieve net, one end that rigid pipe is located in high/low temperature insulating box are connected to gas-liquid solid separation system, and gas-liquid solid separation system is used for Collect gas, liquid and the solid generated in experimentation;Upper fluid import is equipped in the side wall of the autoclave under Fluid inlet, upper fluid import and lower fluid inlet are located at top half and the lower half portion of autoclave, upper fluid Import and lower fluid inlet are connected to hydrate sample preparation system, and hydrate sample preparation system is used to prepare containing hydrate Deposit sample;The autoclave inner top and bottom are respectively equipped with driving plug and lower driving plug, and upper driving is stifled Mobile sand control piston and lower mobile sand control piston, upper driving plug and lower driving plug on being fixed respectively on head and lower driving plug It is connected to control pressurer system, control pressurer system is used to control axis pressure and back pressure in autoclave.
Further, the hydrate sample preparation system is divided into water supply branch and gas supply branch, and water supply branch includes following Ring water bath with thermostatic control and constant-flux pump and the first valve, circulation constant temperature water-bath, constant-flux pump, the first valve are successively connected by pressure duct Logical, gas supply branch includes gas cylinder, gas booster pump, high pressure storage tank and pressure regulator valve and the second valve, third valve, the 4th valve With the 5th valve, gas cylinder, the second valve, gas booster pump, third valve, high pressure storage tank, the 4th valve, pressure regulator valve, the 5th valve Door is sequentially communicated by pressure duct, and first pressure gauge is connected on high pressure storage tank, is distinguished after water supply branch and gas supply branch doubling With upper fluid import and lower fluid inlet communication.
Further, the gas-liquid solid separation system is divided into liquid phase branch and solid phase branch, and liquid phase branch includes collection Gas cylinder, collection bottle, gas flowmeter, gas-liquid separator and strainer, gas bottle, gas flowmeter are sequentially communicated by pressure duct And gas-liquid separator is accessed, collection bottle accesses gas-liquid separator, and gas-liquid separator is located at height by pressure duct and rigid pipe Tube body connection and pressure duct and rigid pipe junction in warm insulating box are arranged strainer, solid phase branch include shake out sampler, Separation disassembly mouth and the 6th valve, the sampler that shakes out are located at the end in high/low temperature insulating box by separation disassembly mouth and rigid pipe Portion's connection, the 6th valve are arranged on rigid pipe and are located between separation disassembly mouth and strainer.
Further, the autoclave is arranged on bracket, and bracket two sides are equipped with axle bed, in the autoclave Portion is mounted on axle bed by shaft, rotate autoclave can around the shaft, and shaft is set on the axle bed perpendicular to rigid pipe There is locking piece, locking piece is for locking shaft.
Preferably, further including pulling rope, pulling rope both ends are equipped with hook, the autoclave bottom and bracket On be equipped with link, the linear distance of two links is greater than the length of pulling rope.
Further, the control pressurer system is divided into axis pressure branch and back pressure branch, axis pressure branch include hand pump and Surge tank and the 7th valve, the 8th valve, the 9th valve, hand pump, the 7th valve, surge tank are successively connected by pressure duct After logical, it is divided into two-way and is connected to respectively with upper driving plug and lower driving plug and is respectively equipped with the 8th valve and the 9th on two accesses Valve connects second pressure gauge on surge tank, and back pressure branch includes back-pressure valve and the tenth valve, and back-pressure valve, the tenth valve are successively It is arranged on the pipeline between gas-liquid separator and rigid pipe.
Further, the data collection system includes two temperature sensors, two pressure sensors, two displacements biographies Sensor and computer, two temperature sensors are separately positioned on the two sides up and down of rigid pipe in autoclave, temperature sensor For monitoring the temperature in autoclave, two pressure sensors are separately positioned on up and down two of rigid pipe in autoclave Side, pressure sensor are used to monitor the pore pressure in autoclave, and it is stifled that two displacement sensors are separately positioned on driving On head and lower driving plug, displacement sensor is passed for monitoring stratum settlement situation, temperature sensor, pressure sensor and displacement Sensor passes through data acquisition signal line access computer.
The method shaked out in horizontal well with sand control in evaluation hydrate recovery process, includes the following steps:
S1, check device air-tightness;
S2, sand-water-hydrate formation sample containing hydrate sediment is generated in autoclave;
S3, hydrate simulation exploitation: when using decompression mode, the pore pressure in autoclave 1 is made to be down to and be hydrated The pressure of phase balance is hereinafter, to decompose hydrate;When using heat injection mode, make the temperature in autoclave 1 rise to More than the temperature of hydrate phase balance, to decompose hydrate;
The separation and collection of S4, gas, water and sand: the gas, water and the sand that generate during decomposition of hydrate are divided From gas enters gas bottle through gas flowmeter, and part water enters collection bottle, and remaining water and sand are received by the sampler that shakes out Collection;
S5, different size sand control sieve is installed in rigid outer tube layer, repeats step S2-S4, evaluates hydrate recovery process Sanding Mechanism and sand controlling result after the different sand screen nets of middle installation in horizontal well.
Further, sand described in step S2-water-hydrate formation sample containing hydrate sediment preparation process is such as Under:
S2.1, baked sand and water are stirred, form water sand mixture, stood;
S2.2, water sand mixture is filled into autoclave, by hand pump and upper mobile sand control piston and is moved down Dynamic sand control piston cooperation, loads axial compressive force to water sand mixture, makes its compacting;
S2.3, the required gas of experiment is passed through into autoclave, constant temperature is stood, and guarantees the abundant air inlet of water sand mixture;
S2.4, high/low temperature insulating box and set temperature are opened, makes the reduction of reaction under high pressure temperature in the kettle, guarantee gas needed for testing Body ample supply, when pore pressure no longer changes, i.e., intrapore water is completely converted into hydrate, raw in autoclave at this time The sample containing hydrate sediment of objects system is closed at sand-air-water;
S2.5, constant-flux pump is opened, by upper fluid import and lower fluid inlet to reaction under high pressure from circulation constant temperature water-bath Water filling in kettle carries out displacement to the free gas in autoclave, makes to generate sand-water-hydrate formation in autoclave Sample containing hydrate sediment completes the simulation to the practical reservoir environment containing hydrate in seabed.
The invention has the benefit that
For the phenomenon of shaking out in gas hydrates reservoir recovery process, different geological environments, different exploitation sides are simulated The case where shaking out in horizontal wellbore under the conditions of formula, producing gas and produce water and the case where stratum settlement, differentiate different geological environments with Sanding Mechanism under mining method in horizontal wellbore, meanwhile, different size sand control sieve, simulation are installed in rigidity level outer tube layer Water and stratum settlement rule are shaked out, produce gas and produced under the conditions of different geological conditions, different mining methods in horizontal wellbore, The sand controlling result of different size sand control screen is evaluated, experimental provision structure is simple, easy to operate, and experimental method repeatability is strong, Not only the basis of experiment and research can be provided for related colleges and universities and scientific research institutions, also China's natural gas hydrate exploration is developed With important economic value and social benefit.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of experimental provision of the present invention;
Attached drawing 2 is the structural schematic diagram of reaction kettle of the present invention;
Attached drawing 3 is the structural schematic diagram of hydrate sample preparation system of the present invention;
Attached drawing 4 is the structural schematic diagram of back pressure branch in gas-liquid solid separation system of the present invention and control pressurer system;
Attached drawing 5 is the rack-mount structural schematic diagram of autoclave of the present invention;
Attached drawing 6 is the structural schematic diagram that control pressurer system axis of the present invention presses branch;
Attached drawing 7 is the structural schematic diagram of data collection system of the present invention.
Mark explanation: 1, autoclave, 2, high/low temperature insulating box, 3, rigid pipe, 4, sand control sieve, 5, upper fluid into Mouthful, 6, lower fluid inlet, 7, upper driving plug, 8, upper mobile sand control piston, 9, lower mobile sand control piston, 10, lower driving plug, 11, gas cylinder, the 12, second valve, 13, gas booster pump, 14, third valve, 15, first pressure gauge, 16, high pressure storage tank, 17, Four valves, 18, pressure regulator valve, the 19, the 5th valve, 20, circulation constant temperature water-bath, 21, constant-flux pump, the 22, first valve, 23, gas bottle, 24, gas flowmeter, 25, gas-liquid separator, 26, collection bottle, 27, back-pressure valve, the 28, the tenth valve, 29, separation disassembly mouth, 30, Shake out sampler, 31, strainer, the 32, the 6th valve, 33, link, 34, bracket, 35, axle bed, 36, shaft, 37, locking piece, 38, 8th valve, the 39, the 9th valve, 40, second pressure gauge, 41, surge tank, the 42, the 7th valve, 43, hand pump, 44, displacement biography Sensor, 45, pressure sensor, 46, temperature sensor, 47, computer.
Specific embodiment
It please refers to Fig. 1, shown in 2, evaluates the device to shake out in horizontal well with sand control in hydrate recovery process, including high pressure Reaction kettle 1, high/low temperature insulating box 2, hydrate sample preparation system, control pressurer system, gas-liquid solid separation system and data are adopted Collecting system, hydrate sample preparation system, control pressurer system, gas-liquid solid separation system and data acquisition system are anti-with high pressure Kettle 1 is answered to connect, in which: the autoclave 1 is arranged in high/low temperature insulating box 2, and high/low temperature insulating box 2 is for controlling high pressure Temperature in reaction kettle 1, thus the temperature environment of simulated sea bottom hydrate reservoir, thermostatic control system uses import intelligent temperature control Instrument carries out temperature control, and temperature controller is heated using Intelligent PID Control mode control system, guarantees the precision of system temperature control;The high pressure Rigid pipe 3 through its side wall is installed, rigid pipe 3 is horizontality, and rigid pipe 3 is able to bear larger lotus in the middle part of reaction kettle 1 Pressure is carried, for simulating the horizontal well for carrying out hydrate exploitation, one end of rigid pipe 3 is located in autoclave 1, rigid pipe 3 The other end be located in high/low temperature insulating box 2, rigid pipe 3 is located at one end in autoclave 1 equipped with equidistant aperture and outer Layer is equipped with sand control sieve 4, and when reality is selected, the diameter of rigid pipe 3 is 15mm, and the aperture of aperture is 2mm on rigid pipe 3, just Property pipe 3 be located at one end in high/low temperature insulating box 2 and be connected to gas-liquid solid separation system, gas-liquid solid separation system is for collecting experiment Gas, liquid and the solid generated in the process;Be equipped in the side wall of the autoclave 1 upper fluid import 5 and lower fluid into Mouthfuls 6, upper fluid import 5 and lower fluid inlet 6 are located at top half and the lower half portion of autoclave 1, upper fluid into Mouth 5 and lower fluid inlet 6 are connected to hydrate sample preparation system, and hydrate sample preparation system is used to prepare containing hydrate Deposit sample;1 inner top of autoclave and bottom are respectively equipped with driving plug 7 and lower driving plug 10, upper drive Mobile sand control piston 8 and lower mobile sand control piston 9 on being fixed respectively on dynamic plug 7 and lower driving plug 10, upper 7 He of driving plug Lower driving plug 10 is connected to control pressurer system, and control pressurer system is used to control the axis pressure in autoclave 1 and returns Pressure.
Please refer to Fig. 1, shown in 3, the hydrate sample preparation system is divided into water supply branch and gas supply branch, in which: supplies Moisture road includes circulation constant temperature water-bath 20 and constant-flux pump 21 and the first valve 22, circulation constant temperature water-bath 20, constant-flux pump 21, first Valve 22 is sequentially communicated by pressure duct, and circulation constant temperature water-bath 20 can automatically control output water temperature, the control of the first valve 22 The water inlet of autoclave 1;Gas supply branch includes gas cylinder 11, gas booster pump 13, high pressure storage tank 16 and pressure regulator valve 18 and the Two valves 12, third valve 14, the 4th valve 17 and the 5th valve 19, the 5th valve 19 control the air inlet of autoclave 1, gas Bottle the 11, second valve 12, gas booster pump 13, third valve 14, high pressure storage tank 16, the 4th valve 17, pressure regulator valve 18, the 5th valve Door 19 is sequentially communicated by pressure duct, and first pressure gauge 15 is connected on high pressure storage tank 16.Water supply branch and gas supply branch doubling It is connected to respectively with upper fluid import 5 and lower fluid inlet 6 afterwards, when only needing to be passed through gas into autoclave 1, closes the One valve 22 opens the 5th valve 19;When only needing to be passed through water into autoclave 1, the 5th valve 19 is closed, opens the One valve 22.
Please refer to Fig. 1, shown in 4, the gas-liquid solid separation system is divided into liquid phase branch and solid phase branch, in which: gas-liquid Phase branch includes gas bottle 23, collection bottle 26, gas flowmeter 14, gas-liquid separator 25 and strainer, gas bottle 23, gas flow Meter 24 is sequentially communicated by pressure duct and accesses gas-liquid separator 15, and collection bottle 26 accesses gas-liquid separator 25, gas-liquid separation Device 25 is located at that the tube body in high/low temperature insulating box 2 is connect and pressure duct is connect with rigid pipe 3 by pressure duct and rigid pipe 3 Place's setting strainer 31;Solid phase branch includes shake out sampler 30, separation disassembly mouth 29 and the 6th valve 32, and shake out sampler 30 It is located at the end in high/low temperature insulating box 2 with rigid pipe 3 by separation disassembly mouth 29 to connect, the 6th 32, valve is arranged in rigid pipe On 3 and it is located between separation disassembly mouth 29 and strainer 31.
It please refers to shown in Fig. 5, the autoclave 1 is arranged on bracket 34, and 34 two sides of bracket are equipped with axle bed 35, described It is mounted on axle bed 35 in the middle part of autoclave 1 by shaft 36, rotate autoclave 1 can around the shaft, shaft 36 is vertical In rigid pipe 3, the axle bed 35 is equipped with locking piece 37, and locking piece 37 is for locking shaft 36.In experimentation, need to collect When into sand and water in rigid pipe 3, autoclave 1 need to only be rotated, Sha Heshui will move to going out for 3 left end of rigid pipe In sand sampler 30.It preferably migrates into the sampler 30 that shakes out to make to enter sand and water energy in rigid pipe 3, in rigid pipe 3 Wall is coated with super hydrophobic material coating.
Preferably, further including pulling rope, pulling rope both ends are equipped with hook, the autoclave bottom 1 and branch Link 33 is equipped on frame 34, the linear distance of two links 33 is greater than the length of pulling rope.In experimentation, drawing can be passed through Autoclave 1 is pulled to by rope to be tilted and so that autoclave 1 is kept heeling condition by link 33 and hook cooperation, is conveniently gone out The installation and removal of sand sampler 30.
It please refers to shown in Fig. 1,4,6, the control pressurer system is divided into axis pressure branch and back pressure branch, in which: axis pressure point Road includes hand pump 43 and surge tank 41 and the 7th valve 42, the 8th valve 38, the 9th valve 39, hand pump 43, the 7th valve After door 42, surge tank 41 are sequentially communicated by pressure duct, it is divided into two-way and connects respectively with upper driving plug 7 and lower driving plug 10 It is respectively equipped with the 8th valve 38 and the 9th valve 39 on logical and two accesses, connects second pressure gauge 40 on surge tank 41;Back pressure point Road includes back-pressure valve 27 and the tenth valve 28, and back-pressure valve 27, the tenth valve 28 are successively set on gas-liquid separator 25 and rigid pipe 3 Between pipeline on.
Please refer to Fig. 1, shown in 7, the data collection system includes two temperature sensors, 46, two pressure sensors 45, two displacement sensors 44 and computer 47, in which: two temperature sensors 46 are separately positioned in autoclave 1 just Property pipe 3 two sides up and down, temperature sensor 46 is used to monitor temperature in autoclave;Two pressure sensors 45 are set respectively The two sides up and down of the rigid pipe 3 in autoclave 1 are set, pressure sensor 45 is used to monitor the Pore Pressure in autoclave 1 Power;Two displacement sensors 44 are separately positioned on driving plug 7 and lower driving plug 10, and displacement sensor 44 is for monitoring Stratum settlement situation.Temperature sensor 46, pressure sensor 45 and displacement sensor 44 are accessed by data acquisition signal line Computer 47.
The method shaked out in horizontal well with sand control in hydrate recovery process is evaluated by above-mentioned apparatus, including is walked as follows It is rapid:
S1, check device air-tightness: the second valve 12 and third valve 14 are opened, makes methane gas stream through gas booster pump 13 Into high pressure storage tank 16, the 4th valve 17 and the 5th valve 19 are then opened, pressure regulator valve 18 is adjusted, passes through 5 He of upper fluid import Lower fluid inlet 6 injects 15MPa methane gas into autoclave 1, maintains the pressure and observes 24 hours, checks that methane gas has No leakage closes the second valve 12, third valve 14, the 4th valve 17 and the 5th valve 19 if No leakage, opens back-pressure valve 27 With the tenth valve 28, the methane gas in autoclave 1 is emptied, closes back-pressure valve 27 and the tenth valve 28;
S2, sand-water-hydrate formation sample containing hydrate sediment is generated in autoclave 1, preparation process is such as Under:
S2.1, baked sand and a certain amount of water are stirred, form water sand mixture, stood 24 hours, mixing water It is uniformly distributed in object;
S2.2, well-mixed water sand mixture is filled into autoclave 1, it is anti-by hand pump 43 and upper movement Sand piston 8 and lower mobile sand control piston 9 cooperate, and load 12MPa axial compressive force to water sand mixture, are compacted it to a certain degree;
S2.3, it is passed through gas needed for 10-11MPa is tested into autoclave 1, stands 12 hours at 20 DEG C, guarantee The abundant air inlet of water sand mixture;
S2.4, high/low temperature insulating box 2 and set temperature are opened, temperature in autoclave 1 is made to be reduced to 2 DEG C, guaranteed real Required gas ample supply is tested, in 72 hours, when pore pressure no longer changes, i.e., intrapore water is completely converted into hydrate, The sample containing hydrate sediment that sand-air-water closes objects system is generated in autoclave 1 at this time;
S2.5, open constant-flux pump 21, with 15ml/min flow velocity, 11MPa pressure, by upper fluid import 5 and lower fluid into Mouth 6 carries out displacement from filling the water in circulation constant temperature water-bath 20 into autoclave 1, to the free gas in autoclave 1, makes height It presses and generates sand-water-hydrate formation sample containing hydrate sediment in reaction kettle 1, complete the hydrate that contains practical to seabed and store up The simulation of layer environment;
S3, hydrate simulation exploitation: when using decompression mode, back-pressure valve 27 and the tenth valve 28 is opened, reaction under high pressure is made Pore pressure in kettle 1 is down to the pressure with hydrate phase balance hereinafter, to decompose hydrate;When using heat injection mode, beat Open the first valve 22, hot water injected into autoclave 1 by constant-flux pump 21, make the temperature in autoclave 1 rise to More than the temperature of hydrate phase balance, to decompose hydrate;
The separation and collection of S4, gas, water and sand: the gas, water and the sand that generate during decomposition of hydrate are divided From wherein gas and most of liquid are entered in gas-liquid separator 25 by strainer 31, the tenth valve 28 and back-pressure valve 27, then Gas enters gas bottle 23 through gas flowmeter 24, and part water enters collection bottle 26, and remaining water and sand need still in rigid pipe 3 When collecting, the 6th valve 32 is opened, by rotary high pressure reaction kettle 1, remaining liq and sand is made to enter the sampler 30 that shakes out, The 6th valve 32 is closed, the sampler 30 that shakes out is dismantled by unloading separation disassembly mouth 29, that is, collects remaining water and sand, collected After be reinstalled the sampler 30 that shakes out, opening the 6th valve 32 can be acquired next time;
S5, different size sand control sieve 4 is installed in 3 outer layer of rigid pipe, repeats step S2-S4, evaluation hydrate was exploited Sanding Mechanism and sand controlling result after different sand screen nets 4 in horizontal well is installed in journey.
Certainly, the above is only better embodiments of the present invention, and use scope of the invention is not limited with this, therefore, it is all Equivalent change is made in the principle of the invention should be included within the scope of the present invention.

Claims (9)

1. the device to shake out with sand control in horizontal well in evaluation hydrate recovery process, it is characterised in that: including autoclave, High/low temperature insulating box, hydrate sample preparation system, control pressurer system, gas-liquid solid separation system and data acquisition system, water Object sample preparation system, control pressurer system, gas-liquid solid separation system and data acquisition system is closed to connect with autoclave; The autoclave is arranged in high/low temperature insulating box, and high/low temperature insulating box is used to control the temperature in autoclave, from And the temperature environment of simulated sea bottom hydrate reservoir;Rigid pipe through its side wall is installed, just in the middle part of the autoclave Property pipe be horizontality, for simulate the horizontal well of progress hydrate exploitation, one end of rigid pipe is located in autoclave, just Property pipe the other end be located in high/low temperature insulating box, rigid pipe is located at one end in autoclave equipped with equidistant aperture and outer Layer is equipped with sand control sieve, and one end that rigid pipe is located in high/low temperature insulating box is connected to gas-liquid solid separation system, gas-liquid-solid point From system for collecting the gas, liquid and solid generated in experimentation;Upstream is equipped in the side wall of the autoclave Body import and lower fluid inlet, upper fluid import and lower fluid inlet are located at top half and the lower half of autoclave Point, upper fluid import and lower fluid inlet are connected to hydrate sample preparation system, and hydrate sample preparation system is for making Standby sample containing hydrate sediment;The autoclave inner top and bottom are respectively equipped with driving plug and lower driving is stifled Mobile sand control piston and lower mobile sand control piston on being fixed respectively on head, upper driving plug and lower driving plug, upper driving plug It is connected to control pressurer system with lower driving plug, control pressurer system is used to control the axis pressure in autoclave and returns Pressure;The data collection system is used to acquire the physical state information in reaction kettle.
2. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 1, feature Be: the hydrate sample preparation system be divided into water supply branch and gas supply branch, water supply branch include circulation constant temperature water-bath and Constant-flux pump and the first valve, circulation constant temperature water-bath, constant-flux pump, the first valve are sequentially communicated by pressure duct, supply branch Including gas cylinder, gas booster pump, high pressure storage tank and pressure regulator valve and the second valve, third valve, the 4th valve and the 5th valve, Gas cylinder, the second valve, gas booster pump, third valve, high pressure storage tank, the 4th valve, pressure regulator valve, the 5th valve pass through high-voltage tube Road is sequentially communicated, and connects first pressure gauge on high pressure storage tank, after water supply branch and gas supply branch doubling respectively with upper fluid import With lower fluid inlet communication.
3. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 2, feature Be: the gas-liquid solid separation system is divided into liquid phase branch and solid phase branch, liquid phase branch include gas bottle, collection bottle, Gas flowmeter, gas-liquid separator and strainer, gas bottle, gas flowmeter are sequentially communicated by pressure duct and access gas-liquid point From device, collection bottle accesses gas-liquid separator, and gas-liquid separator is located in high/low temperature insulating box by pressure duct and rigid pipe Tube body connection and pressure duct and rigid pipe junction are arranged strainer, solid phase branch include shake out sampler, separation disassembly mouth with And the 6th valve, the sampler that shakes out are located at the end in high/low temperature insulating box with rigid pipe by separation disassembly mouth and connect, the 6th Valve is arranged on rigid pipe and is located between separation disassembly mouth and strainer.
4. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 3, feature Be: the autoclave is arranged on bracket, and bracket two sides are equipped with axle bed, is pacified in the middle part of the autoclave by shaft It on axle bed, rotate autoclave can around the shaft, for shaft perpendicular to rigid pipe, the axle bed is equipped with locking piece, lock Part is determined for locking shaft.
5. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 4, feature It is: further includes pulling rope, pulling rope both ends are equipped with hook, are equipped with link on the autoclave bottom and bracket, The linear distance of two links is greater than the length of pulling rope.
6. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 5, feature Be: the control pressurer system is divided into axis pressure branch and back pressure branch, and axis pressure branch includes hand pump and surge tank and the Seven valves, the 8th valve, the 9th valve are divided into two after hand pump, the 7th valve, surge tank are sequentially communicated by pressure duct Road is connected to upper driving plug and lower driving plug respectively and is respectively equipped with the 8th valve and the 9th valve, surge tank on two accesses Upper connection second pressure gauge, back pressure branch include back-pressure valve and the tenth valve, and back-pressure valve, the tenth valve are successively set on gas-liquid point From on the pipeline between device and rigid pipe.
7. the device to shake out in horizontal well with sand control in evaluation hydrate recovery process according to claim 6, feature Be: the data collection system includes two temperature sensors, two pressure sensors, two displacement sensors and calculating Machine, two temperature sensors are separately positioned on the two sides up and down of rigid pipe in autoclave, and temperature sensor is for monitoring height The temperature in reaction kettle is pressed, two pressure sensors are separately positioned on the two sides up and down of rigid pipe in autoclave, and pressure passes Sensor is used to monitor the pore pressure in autoclave, and two displacement sensors are separately positioned on driving plug and lower driving On plug, for monitoring stratum settlement situation, temperature sensor, pressure sensor and displacement sensor pass through displacement sensor Data acquisition signal line accesses computer.
8. the method for evaluating hydrate dynamic formation in oil/gas drilling by device as claimed in claim 7, it is characterised in that: packet Include following steps:
S1, check device air-tightness;
S2, sand-water-hydrate formation sample containing hydrate sediment is generated in autoclave;
S3, hydrate simulation exploitation: when using decompression mode, it is down to the pore pressure in autoclave 1 and hydrate phase The pressure of balance is hereinafter, to decompose hydrate;When using heat injection mode, the temperature in autoclave 1 is made to rise to and be hydrated More than the temperature of phase balance, to decompose hydrate;
The separation of S4, gas, water and sand are with collection: separating to the gas, water and the sand that generate during decomposition of hydrate, gas Body enters gas bottle through gas flowmeter, and part water enters collection bottle, and remaining water and sand are collected by the sampler that shakes out;
S5, different size sand control sieve is installed in rigid outer tube layer, repeats step S2-S4, evaluates and pacify in hydrate recovery process Fill the Sanding Mechanism and sand controlling result after different sand screen nets in horizontal well.
9. the experimental method of hydrate dynamic formation, feature exist in a kind of evaluation oil/gas drilling according to claim 8 In: sand described in step S2-water-hydrate formation sample containing hydrate sediment preparation process is as follows:
S2.1, baked sand and water are stirred, form water sand mixture, stood;
S2.2, water sand mixture is filled into autoclave, it is anti-by hand pump and upper mobile sand control piston and lower movement The cooperation of sand piston loads axial compressive force to water sand mixture, makes its compacting;
S2.3, the required gas of experiment is passed through into autoclave, constant temperature is stood, and guarantees the abundant air inlet of water sand mixture;
S2.4, high/low temperature insulating box and set temperature are opened, makes the reduction of reaction under high pressure temperature in the kettle, guarantee that gas needed for testing fills Divide supply, when pore pressure no longer changes, i.e., intrapore water is completely converted into hydrate, generates in autoclave at this time Sand-air-water closes the sample containing hydrate sediment of objects system;
S2.5, open constant-flux pump, by upper fluid import and lower fluid inlet from circulation constant temperature water-bath into autoclave Water filling carries out displacement to the free gas in autoclave, keeps generation sand-water-hydrate formation in autoclave aqueous Sediment sample is closed, the simulation to the practical reservoir environment containing hydrate in seabed is completed.
CN201910703877.XA 2019-07-31 2019-07-31 The device and method to shake out in horizontal well with sand control in evaluation hydrate recovery process Pending CN110454146A (en)

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