CN105178953A - Device and method for measuring hydrate reservoir decomposition rate in drilling process - Google Patents
Device and method for measuring hydrate reservoir decomposition rate in drilling process Download PDFInfo
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Abstract
The invention belongs to the field of natural gas development, and particularly relates to a device and a method for measuring hydrate reservoir decomposition rate in a drilling process. The device for measuring hydrate reservoir decomposition rate and hydrate decomposition air flow in the drilling process comprises a hydrate generating and decomposing unit, an auxiliary unit and a measuring unit. The hydrate generating and decomposing unit simulates environmental conditions of a hydrate reservoir in the drilling process, and provides a place for generation and decomposition of hydrate; the auxiliary unit provides an air source and a liquid source for generation of the hydrate; and the measuring unit measures the decomposition rate and the decomposition air flow of the hydrate reservoir. By the device and the method, conditions of hydrate reservoir decomposition and output gas after decomposition of a hydrate reservoir can be simulated in a drilling process, and safety of deepwater drilling can be evaluated.
Description
Technical field
The invention belongs to construction of natural gas fields field, particularly, relate to a kind of apparatus and method measuring hydrate reservoir decomposition rate in drilling process.
Background technology
As a kind of important marine energy, gas hydrates have that reserves are comparatively large, energy density is higher, bury the advantages such as more shallow, distribution is wider, is the desirable alternative energy source of traditional coal, petroleum-based energy.The development and location of gas hydrates is national science and technology strategic high ground by the country such as the U.S., Russia, Canada, Germany, Japan and Korea S in succession, has dropped into a large amount of manpowers and material resources, has carried out a series of primary study, and achieved certain achievement.China is also studied at eighties of last century foot couple gas hydrates, and efficiently extracting natural gas hydrate is considered as a long term object.
In the process of efficiently extracting natural gas hydrate, drilling well is the important step that can not lack.Because gas hydrates self have special phase equilibrium properties, therefore have a great difference with general hydrocarbon formations drilling well, this type of strata drilling will face more complicated heat and moisture transfer problems.Such as, in natural gas hydrate stratum drilling process, the heat transfer of drilling fluid and reservoir, drill bit and the friction between rock, the borehole wall and bottomhole can promote the temperature of whole system; And along with the continuous drilling well of drill bit, strata pressure also can fluctuate.The change of temperature and pressure, may cause the decomposition of gas hydrates.Wherein, play solid-state decomposition of hydrate that is cementing or skeletal support effect in stratum, decomposition moisture diffusion out, in stratum, easily causes cave-in.Simultaneously, escaping gas not only have impact on proportion and the rheological characteristic of drilling fluid, the accidents such as easy initiation blowout, well kick, with drilling fluid returning in the process on ground, more there is the places such as circulation of drilling fluid pipeline and preventer and again form hydrate, impact is normally crept into, and causes the risk of drilling failure.
In order to reduce the loss that these risks are brought, accurately understanding the situation that drilling process causes hydrate reservoir to decompose, sum up corresponding Changing Pattern and assess the influence degree of decomposition of hydrate gas for well control, becoming vital link.Traditional method for numerical simulation, the hypothesis related to is more, and reality is quite different, truly cannot reflect actual hydrate layer situation.In recent years, scholar is had to take up in design simulation experimental facilities, under indoor environment, actual monitoring is carried out to hydrate layer, but all do not simulate in drilling process, the grinding of drill bit and the circulation of mud, on the impact of system temperature and hydrate phase change, also decomposition of hydrate situation and the gas flow that produces after decomposing are not carried out measuring and analysis, and these parameters are the important security parameters ensureing that hydrate layer creeps into.
For above-mentioned situation, be necessary to design a kind of device, carry out appraisal drilling Water Under compound and decompose situation, calculated hydration thing decomposition rate and output tolerance, for hydrate layer safety drilling provides basic condition.
Summary of the invention
For overcoming the defect existing for prior art, the invention provides a kind of apparatus and method measuring hydrate reservoir decomposition rate in drilling process, the theoretical research and the field operation that drill hydrate reservoir for deep water is safe and efficient provide technical support.
For achieving the above object, the present invention adopts following technical proposals:
Measure the device of hydrate reservoir decomposition rate and decomposition of hydrate tolerance in drilling process, comprising: hydrate generates resolving cell, auxiliary unit and determination unit.Hydrate generates the ambient conditions of hydrate reservoir in resolving cell simulation drilling process, for the generation of hydrate and decomposition provide place; The generation that auxiliary unit is hydrate provides source of the gas and liquid source; Determination unit is measured the decomposition rate of hydrate reservoir and is decomposed tolerance.
Relative to prior art, beneficial effect of the present invention is as follows: can simulate in drilling process, and output gas situation after hydrate layer decomposes and decomposes, for evaluating deepwater drilling safety.Specifically comprise:
1, the affecting laws of solution to decomposition of hydrate of variety classes and concentration can be studied;
2, the measurement of hydrate layer electrical impedance, pressure, temperature in drilling process can be realized, estimation decomposition of hydrate amount;
3, the affecting laws to decomposition of hydrate amount such as drill bit rotational, mud circulation under drilling condition can be studied;
4, different power auger speed, drilling fluid system for the impact of decomposition of hydrate output tolerance, drilling safety can be ensured in analog study hydrate reservoir drilling process.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram measuring hydrate reservoir decomposition rate in drilling process;
In figure, 101, insulating box, 102, reactor, 103, air inlet, 104, steam vent, 105, inlet opening, 106, electric impedance sensor, 107, temperature pick up, 108, rig, 109, sealing device, 110, drilling rod, 111, drill bit, 112, support, 113, slush pump, 114, flow meter, 115, one way valve, 201, vacuum pump, 202, vacuum meter, 203, gas cylinder, 204, constant voltage constant speed pump, 205, priming device, 301, pressure regulator valve, 302, gas/liquid separator device, 303, airtight draining container, 304, weighing device, 401, first liquid storage container, 402, second liquid storage container, 403, 3rd liquid storage container, 501, first control valve, 502, second control valve, 503, 3rd control valve, 504, 4th control valve, 601, first pressure sensor, 602, second pressure sensor, 603, 3rd pressure sensor, 604, 4th pressure sensor.
Detailed description of the invention
As shown in Figure 1, measure the device of hydrate reservoir decomposition rate and decomposition of hydrate tolerance in drilling process, comprising: hydrate generates resolving cell, auxiliary unit and determination unit.Hydrate generates the ambient conditions of hydrate reservoir in resolving cell simulation drilling process, for the generation of hydrate and decomposition provide place; The generation that auxiliary unit is hydrate provides source of the gas and liquid source; Determination unit is measured the decomposition rate of hydrate in reservoir and is decomposed tolerance.
Hydrate generates resolving cell, comprising: insulating box 101, reactor 102, rig 108, first liquid storage container 401; Be placed with reactor 102 in insulating box 101, insulating box 101 top is fixed with support 112, support 112 is placed with rig 108, and rig 108 lower end is connected with drilling rod 110, and drill bit 111 is installed in drilling rod 110 lower end, and drilling rod 110 tip exterior ring has sealing device 109; Rig 108 drilling speed is adjustable, and for simulation drilling process provides power, drilling rod 110 and drill bit 111 are for simulating drilling process, and sealing device 109 ensures the sealing in drilling process.
First liquid storage container 401 is connected with drilling rod 110 top through sealing device 109 by feed-line, and feed-line is provided with slush pump 113, flow meter 114 and one way valve 115 successively from the first liquid storage container 401 to drilling rod 110 direction; First liquid storage container 401 splendid attire mud drilling liquid, mud drilling liquid is extracted by slush pump 113 and measures actual flow through flow meter 114 and enter into drilling rod 110, and one way valve 115 controls the flow direction of mud drilling liquid.
Place quantitative sand, stone in the ratio set and distribution in reactor 102, reactor 102 is that the generation of hydrate simulates reservoir environment with decomposition, and insulating box 101 controls the temperature of reaction system; Reactor 102 top is provided with air inlet 103, inlet opening 105, steam vent 104, and steam vent 104 is placed in the middle, and drilling rod 110 enters in reactor 104 times by steam vent, and air inlet 103 and inlet opening 105 are positioned at steam vent 104 both sides.
Reactor 102 is provided with the 3rd pressure sensor 603, electric impedance sensor 106, temperature pick up the 107, three pressure sensor 603, electric impedance sensor 106, temperature pick up 107 are all connected with computer data processing system; Real-time pressure in reactor 102 measured by 3rd pressure sensor 603, electric impedance sensor 106 measures real-time electrical impedance in reactor 102, real time temperature in reactor 102 measured by temperature pick up 107, computer data processing system is for gathering, store and analyzing real-time pressure, temperature, electrical impedance data, hydrate generates decomposition situation to utilize electrical impedance data to judge, utilizes pressure, temperature data to calculate the decomposition rate of hydrate in drilling process.
Auxiliary unit, comprising: vacuum pump 201, vacuum meter 202, gas cylinder 203, constant voltage constant speed pump 204, priming device 205; Vacuum pump 201 is connected with air inlet 103 by feed-line, and feed-line is provided with the first control valve 501 and vacuum meter 202 successively from vacuum pump 201 to air inlet 103 direction; Vacuum pump 201 is for vacuumizing in reactor 102, and utilize the first control valve 501 to control the flowing of gas, situation about vacuumizing in reactor 102 measured by vacuum meter 202.
Gas cylinder 203 is connected with air inlet 103 by feed-line, feed-line is provided with successively constant voltage constant speed pump 204, the 3rd control valve 503, second pressure sensor 602 from gas cylinder 203 to air inlet 103 direction; Required gases at high pressure are had in gas cylinder 203, as methane, source of the gas is provided for hydrate generates resolving cell, by constant voltage constant speed pump 204, gas boosting to preset value is inputted in reactor 102, the 3rd control valve 503 is utilized to control the flowing of gas, the actual pressure of the second pressure sensor 602 measurement gas.
Priming device 205 is connected with the inlet opening 105 on reactor 102 by feed-line, and feed-line is provided with the first pressure sensor 601, second control valve 502 successively from priming device 205 to inlet opening 105 direction; Priming device 205 is made up of fluid connection device and manual pump, the configuration solution needed for fluid connection device splendid attire, and manually configuration solution is injected in reactor 102 by pump; Utilize the second control valve 502 to control to inject the flowing of solution, the real-time pressure injecting solution measured by the first pressure sensor 601.
Determination unit, comprising: pressure regulator valve 301, gas/liquid separator device 302, airtight draining container 303, weighing device 304, the 3rd liquid storage container 403.
Steam vent 104 is connected with gas/liquid separator device 302 by feed-line, and feed-line is provided with the 4th pressure sensor 604, pressure regulator valve 301 and the 4th control valve 504 successively from steam vent 104 to gas/liquid separator device 302 direction; Pressure real-time in reactor 102 measured by 4th pressure sensor 604, regulate pressure regulator valve 301 that the real-time pressure in reactor 102 is maintained required fixed value, 4th control valve 504 controls the flowing of Exhaust Gas, by gas/liquid separator device 302, the fluid of discharge is carried out gas-liquid separation.
Gas/liquid separator device 302 bottom is provided with fluid apertures, and fluid apertures is connected with the second liquid storage container 402 by feed-line; The isolated liquid of second liquid storage container 402 splendid attire.
Gas/liquid separator device 302 upper end has pore, and pore is connected by the top of feed-line with airtight draining container 303.
Airtight draining container 303 is connected with the 3rd liquid storage container 403 by feed-line, feed-line stretches into airtight draining container 303 inner chamber and close bottom, 3rd liquid storage container 403 is placed on weighing device 304, and weighing device 304 is connected with computer data processing system; Airtight draining container 303 is by the volume of gas after drainage measurement gas-liquid separation, the water that 3rd liquid storage container 403 is discharged for splendid attire drainage, weighing device 304 measures the quality of discharging water, and computer data processing system is for gathering, store and analyzing real-time qualitative data.
Measure the method for hydrate reservoir decomposition rate and decomposition of hydrate tolerance in drilling process, adopt the device of hydrate reservoir decomposition rate and decomposition of hydrate tolerance in said determination drilling process, concrete steps are as follows:
1, temperature, the pressure of adjusting device, simulating hydrate generates
In reactor 102, place quantitative sand, stone in the ratio of setting and distribution, to simulate corresponding reservoir environment, close all valves of whole device;
Open the first control valve 501, open vacuum pump 201, the gas in extraction still 102, until vacuum meter 202 reading is negative;
Close vacuum pump 201, close the first control valve 501;
The solion of configuration prescribed concentration, puts into the fluid connection device of priming device 205;
Open the second control valve 502, configuration solution is injected in reactor 102 by the manual pump rotated in priming device 205, adjust the rotating speed of manual pump by observing the first pressure sensor 601 pressure reading in injection process, observe and recording liquid linker on volume reading, until the volume reading on the first pressure sensor 601 pressure reading and fluid connection device reaches preset value, stop operating manual pump, closes the second control valve 502;
The temperature of insulating box 101 is adjusted to preset value, reactor 102 is heated, until insulating box 101 actual temperature reading change be less than ± 0.01 DEG C;
Open the 3rd control valve 503, open constant voltage constant speed pump 204, specified pressure is set, gas in gas cylinder 203 is delivered in reactor 102, observe and record the second pressure sensor 602, 3rd pressure sensor 603, electric impedance sensor 106, temperature pick up 107 real time readouts, continue gas injection, until the second pressure sensor 602, 3rd pressure sensor 603 reading reaches preset value, and electric impedance sensor 106, temperature pick up 107 reading tends towards stability, namely in reactor 102, hydrate generates completely under preset pressure, close the 3rd control valve 503, close constant voltage constant speed pump 204,
2, simulate drilling process, gather supplemental characteristic during decomposition of hydrate
Configuration mud also puts into the first liquid storage container 401, opens slush pump 113, injects circulating mud to drilling rod 110 inside, utilizes flow meter 114 and one way valve 115 Monitoring and Controlling mud flow rate and the flow direction;
Open weighing device 304, and carry out return-to-zero;
Open the 4th control valve 504, by adjustment pressure regulator valve 301, the reading of the 4th pressure sensor 604 is made to be maintained fixed value P constant, and the gas of discharging after utilizing drainage to collect gas-liquid separation, until reading no longer changes on weighing device 304, namely decomposition of hydrate is complete, closes the 4th control valve 504;
Setting Minimum-time interval 0.001 ~ 0.002s is dt, the reading m of record weighing device 304 in every section of Minimum-time interval dt
1;
Open rig 108 power supply, adjustment drilling speed, to setting value, drives drilling rod 110 and drill bit 111, thus simulation drilling process;
3, the real-time decomposition speed of hydrate under different condition is calculated
The reading m of record weighing device 304 in every section of Minimum-time interval dt
1, the volume of drainage exudate body is become by following formula scales:
In formula, V
1---discharge the volume of liquid;
M
1---discharge the quality of liquid;
ρ
1---discharge the density of liquid;
After being separated, the volume of Exhaust Gas is:
V
2＝V
1
In formula, V
1---discharge the volume of liquid;
V
2---the volume of Exhaust Gas after being separated;
After being separated, the amount of substance of Exhaust Gas is by following formulae discovery:
In formula, V
2---the volume of Exhaust Gas after being separated; n
2---Exhaust Gas amount of substance after being separated; ρ
2---the density of Exhaust Gas after being separated; M
2---the molecular mass of Exhaust Gas after being separated.
If the knots modification of Exhaust Gas amount of substance is dn in the dt time
2, then the real-time decomposition speed of hydrate can by following formulae discovery:
In formula, u
2---the real-time decomposition speed of hydrate;
Dt---setting Minimum-time interval 0.001 ~ 0.002s;
Dn
2---the knots modification of Exhaust Gas amount of substance within the dt time.
By regulating constant incubator 101, change the temperature of reaction system, carry out multi-pass operation, research temperature is on the impact of decomposition of hydrate.
By regulating constant voltage constant speed pump 204, changing the pressure of reaction system, carrying out multi-pass operation, research pressure is on the impact of decomposition of hydrate.
By regulating rig 108, changing the rotating speed of drill bit 111, carrying out multi-pass operation, research drill speed is on the impact of decomposition of hydrate.
By regulating the pump speed of slush pump 113, carry out multi-pass operation, research discharge capacity is on the impact of decomposition of hydrate.
By regulating the temperature in the first liquid storage container 401, carry out multi-pass operation, research mud drilling liquid implantation temperature is on the impact of decomposition of hydrate.
By changing the concentration of obtain solution in fluid connection device in injection device 205, carry out repeatedly 11 operations, research solution concentration is on the impact of decomposition of hydrate.
By changing the ionic species of obtain solution in fluid connection device in injection device 205, carry out multi-pass operation, research solion kind is on the impact of decomposition of hydrate.
Claims (10)
1. one kind measures the device of hydrate reservoir decomposition rate in drilling process, comprise: hydrate generates resolving cell, auxiliary unit and determination unit, it is characterized in that: hydrate generates the ambient conditions of hydrate reservoir in resolving cell simulation drilling process, for the generation of hydrate and decomposition provide place; The generation that auxiliary unit is hydrate provides source of the gas and liquid source; Determination unit is measured the decomposition rate of hydrate reservoir and is decomposed tolerance.
2. the device of hydrate reservoir decomposition rate in mensuration drilling process according to claim 1, is characterized in that: hydrate generates resolving cell, comprising: insulating box, reactor, rig, the first liquid storage container; Be placed with reactor in insulating box, insulating box top is fixed with support, and support is placed with rig, and rig lower end is connected with drilling rod, and drill bit is installed in drilling rod lower end, and drilling rod tip exterior ring has sealing device; Rig drilling speed is adjustable, and the first liquid storage container is connected with drilling rod top through sealing device by feed-line, and feed-line is provided with slush pump, flow meter and one way valve from the first liquid storage container successively to drilling rod direction.
3. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-2, is characterized in that: place quantitative sand, stone in the ratio of setting and distribution in reactor, insulating box controls the temperature of reaction system; Reactor top is provided with air inlet, inlet opening, steam vent, and steam vent is placed in the middle, and drilling rod is by entering under steam vent in reactor, and air inlet and inlet opening are positioned at steam vent both sides.
4. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-3, it is characterized in that: reactor is provided with the 3rd pressure sensor, electric impedance sensor, temperature pick up, the 3rd pressure sensor, electric impedance sensor, temperature pick up are all connected with computer data processing system.
5. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-4, is characterized in that: auxiliary unit, comprising: vacuum pump, vacuum meter, gas cylinder, constant voltage constant speed pump, priming device; Vacuum pump is connected with air inlet by feed-line, and feed-line is provided with the first control valve and vacuum meter from vacuum pump successively to air inlet direction; Gas cylinder is connected with air inlet by feed-line, and feed-line is provided with constant voltage constant speed pump, the 3rd control valve, the second pressure sensor successively from gas cylinder to air inlet direction.
6. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-5, it is characterized in that: priming device is connected with the inlet opening on reactor by feed-line, feed-line is provided with the first pressure sensor, the second control valve successively from priming device to inlet opening direction; Priming device is made up of fluid connection device and manual pump, and the configuration solution needed for fluid connection device splendid attire, manually configuration solution is injected in reactor by pump.
7. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-6, is characterized in that: determination unit, comprising: pressure regulator valve, gas/liquid separator device, airtight draining container, weighing device, the 3rd liquid storage container.
8. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-7, it is characterized in that: steam vent is connected with gas/liquid separator device by feed-line, feed-line is provided with the 4th pressure sensor, pressure regulator valve and the 4th control valve successively from steam vent to gas/liquid separator device direction; Gas/liquid separator device bottom is provided with fluid apertures, and fluid apertures is connected with the second liquid storage container by feed-line, the isolated liquid of the second liquid storage container splendid attire; Gas/liquid separator device upper end has pore, and pore is connected by the top of feed-line with airtight draining container.
9. the device of hydrate reservoir decomposition rate in the mensuration drilling process according to claim 1-8, it is characterized in that: airtight draining container is connected with the 3rd liquid storage container by feed-line, feed-line stretches into airtight draining container inner chamber and close bottom, 3rd liquid storage container is placed on weighing device, and weighing device is connected with computer data processing system; Airtight draining container is by the volume of gas after drainage measurement gas-liquid separation, 3rd liquid storage container is used for the water that splendid attire drainage is discharged, weighing device measures the quality of discharging water, and computer data processing system is for gathering, store and analyzing real-time qualitative data.
10. measure a method for hydrate reservoir decomposition rate in drilling process, adopt the device of hydrate reservoir decomposition rate in one of claim 1-9 described mensuration drilling process, concrete steps are as follows:
(1), the temperature of adjusting device, pressure, simulating hydrate generate
Place quantitative sand, stone in the ratio of setting with distribution in a kettle., to simulate corresponding reservoir environment, close all valves of whole device;
Open the first control valve, open vacuum pump, the gas in extraction still, until vacuum meter reading is negative;
Close vacuum pump, close the first control valve;
The solion of configuration prescribed concentration, puts into the fluid connection device of priming device;
Open the second control valve, configuration solution is injected in reactor by the manual pump rotated in priming device, adjust the rotating speed of manual pump by observing the first pressure sensor pressure reading in injection process, observe and recording liquid linker on volume reading, until the volume reading on the first pressure sensor pressure reading and fluid connection device reaches preset value, stop operating manual pump, closes the second control valve;
The temperature of insulating box is adjusted to preset value, to reactor heating, until insulating box actual temperature reading change be less than ± 0.01 DEG C;
Open the 3rd control valve, open constant voltage constant speed pump, specified pressure is set, gas in gas cylinder is delivered in reactor, observe and record the second pressure sensor, the 3rd pressure sensor, electric impedance sensor, temperature pick up real time readouts, continue gas injection, until the second pressure sensor, the 3rd pressure sensor readings reach preset value, and electric impedance sensor, temperature pick up reading tend towards stability, namely in reactor, hydrate generates completely under preset pressure, close the 3rd control valve, close constant voltage constant speed pump;
2, simulate drilling process, gather supplemental characteristic during decomposition of hydrate
Configuration mud also puts into the first liquid storage container, opens slush pump, injects circulating mud to drilling rod inside, utilizes flow meter and one way valve Monitoring and Controlling mud flow rate and the flow direction;
Open weighing device, and carry out return-to-zero;
Open the 4th control valve, by adjustment pressure regulator valve, make the reading of the 4th pressure sensor be maintained fixed value P constant, and the gas of discharging after utilizing drainage to collect gas-liquid separation, until reading no longer changes on weighing device, namely decomposition of hydrate is complete, closes the 4th control valve;
Setting Minimum-time interval 0.001 ~ 0.002s is dt, the reading m of record weighing device in every section of Minimum-time interval dt
1;
Open rig power supply, adjustment drilling speed, to setting value, drives drilling rod and drill bit, thus analogic drilling process;
3, the real-time decomposition speed of hydrate under different condition is calculated
The reading m of record weighing device in every section of Minimum-time interval dt
1, the volume of drainage exudate body is become by following formula scales:
In formula, V
1---discharge the volume of liquid;
M
1---discharge the quality of liquid;
ρ
1---discharge the density of liquid;
After being separated, the volume of Exhaust Gas is:
V
2＝V
1
In formula, V
1---discharge the volume of liquid;
V
2---the volume of Exhaust Gas after being separated;
After being separated, the amount of substance of Exhaust Gas is by following formulae discovery:
In formula, n
2---Exhaust Gas amount of substance after being separated; V
2---the volume of Exhaust Gas after being separated; ρ
2---the density of Exhaust Gas after being separated; M
2---the molecular mass of Exhaust Gas after being separated.
If the knots modification of Exhaust Gas amount of substance is dn in the dt time
2, then the real-time decomposition speed of hydrate can by following formulae discovery:
In formula, u
2---the real-time decomposition speed of hydrate;
Dt---setting Minimum-time interval 0.001 ~ 0.002s;
Dn
2---the knots modification of Exhaust Gas amount of substance within the dt time;
Preferably, by regulating constant incubator, change the temperature of reaction system, carry out multi-pass operation, research temperature is on the impact of decomposition of hydrate;
By regulating constant voltage constant speed pump, changing the pressure of reaction system, carrying out multi-pass operation, research pressure is on the impact of decomposition of hydrate;
By regulating rig, changing the rotating speed of drill bit, carrying out multi-pass operation, research drill speed is on the impact of decomposition of hydrate;
By regulating the pump speed of slush pump, carry out multi-pass operation, research discharge capacity is on the impact of decomposition of hydrate;
By regulating the temperature in the first liquid storage container, carry out multi-pass operation, research mud drilling liquid implantation temperature is on the impact of decomposition of hydrate;
By changing the concentration of obtain solution in fluid connection device in injection device, carry out multi-pass operation, research solution concentration is on the impact of decomposition of hydrate;
By changing the ionic species of obtain solution in fluid connection device in injection device, carry out multi-pass operation, research solion kind is on the impact of decomposition of hydrate.
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| CN109611027A (en) * | 2018-12-25 | 2019-04-12 | 中海石油(中国)有限公司湛江分公司 | Hydrate drilling simulation system and analogy method |
| CN111679061A (en) * | 2020-07-03 | 2020-09-18 | 中国石油大学(北京) | Frozen soil stratum melting and settling test simulation device and method |
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