CN104747187A - Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid - Google Patents
Simulation experimenting device and method for high-temperature and high-pressure reinforced well wall drilling fluid Download PDFInfo
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Abstract
A simulation experimenting device for high-temperature and high-pressure reinforced well wall drilling fluid comprises a crack leaking autoclave body system, a drilling fluid conveying system and an industrial control computer. By means of the device, the leaking and plugging process of cracks with variable or fixed widths under different formation conditions such as temperatures, pressures and permeation rates, the key parameters such as the drilling fluid leaking speed, the pressure bearing capability of a plugging belt and the variation of the widths of the cracks can be monitored, a drilling fluid reinforced well wall action evaluation experiment can be achieved, and the defects that a conventional drilling fluid leakage plugging experimenting device cannot simulate permeating formations and is unchangeable in width of cracks are overcome.
Description
Technical field:
The present invention relates to a kind of HTHP borehole wall and strengthen drilling fluid simulated experimental facilities and method, belong to the technical field of the analogue experiment installation of drilling fluid leak-proof leak-stopping.
Background technology:
Along with Oil And Gas Exploration And Development degree improves constantly, conventional gas and oil resource is fewer and feweri, probing Exploitation Scope progressively moves towards the bad grounds such as deep layer ultra-deep layer, ocean deepwater, unconventional reservoir, drilling fluid leakage problem becomes increasingly conspicuous, usually there is continuation leakage, leak overflow same layer, cave-in, even well such as to scrap at the problem, causes great economic loss.Research shows, cause the essential reason of the problems referred to above to be that Formation bearing pressure is low, namely Drilling Fluids ' Safe Density Windows is narrow, but due to the complex nature of the problem, drilling fluid leakage problem is still the major engineering problems of the domestic and international oil drilling exploitation of puzzlement, fails so far to solve completely.
Present stage, borehole wall strengthening drilling liquid technology improves Formation bearing pressure to stop one of important means of drilling fluid leakage, has on-the-spot application prospect widely.The core of this technology is on the basis in effective shutoff crack, by supporting crack to change nearly rock of borehole stress state, increases nearly borehole wall circumferential stress, thus improves Formation bearing pressure.For dissimilar potential leakage stratum, drilling fluid simulated evaluation experimental is strengthened by the indoor borehole wall, carry out drilling fluid leakage mechanism and preventive action research, grind and select New drilling fluid leak-proof leak-stopping material, borehole wall strengthening drilling liquid technology under final formation theoretical direction, solve the drilling fluid leakage problem in the drilling process of stress discern oil-gas reservoir, fragmentation or weak consolidated formation, fracture development stratum, unconventional reservoir and ocean deepwater oil-gas reservoir to greatest extent, to improve the comprehensive benefit of oil gas drilling exploitation, promote oilfield prospecting developing process.
At present, conventional drilling liquid blockage testing device only can simulate drilling fluid leakage under fixing crack width condition, borehole wall strengthening drilling fluid mechanism of action simulation experiment study demand cannot be met, and the non-permeable material such as simulation fracture medium many employings stainless steel, ignore the impact of fracture surface leak-off effect fracture plugging effect.In addition, the shortcomings such as normal experiment device ubiquity trivial operations, experimental error are large, poor repeatability and function singleness, seriously limit the development of borehole wall strengthening drilling liquid technology.Therefore, set up the experimental technique and analogue experiment installation that are suitable for the research of borehole wall strengthening drilling liquid technology, promotion borehole wall strengthening Development of Drilling Fluids tool is of great significance.
Summary of the invention:
For the deficiencies in the prior art, the object of this invention is to provide a kind of HTHP borehole wall and strengthen drilling fluid simulated experimental facilities, under this device can simulate Different Strata condition (as temperature, pressure, permeability etc.), the leakage in variable or fixed width crack and shutoff process, the key parameters such as monitoring drilling fluid leakage speed, shutoff band bearing capacity, crack width variable quantity, realize the experiment of drilling fluid strengthening borehole wall evaluation of effect, overcoming conventional drilling liquid blockage testing device, cannot to simulate the aspects such as permeable formation, crack width be immutable not enough.
The invention still further relates to a kind of utilize above-mentioned experimental facilities to carry out the method that drilling fluid simulated experiment strengthened by the HTHP borehole wall.
Technical scheme of the present invention is as follows:
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall, comprises crack leakage kettle system, conveying system for drilling fluids and Industrial Personal Computer (IPC);
Described crack leakage pot systems turnkey draws together crack leakage kettle, water booster system, rock core analogue means, central tube and heating tape; Heating tape and rock core analogue means are arranged on crack leakage kettle; Rock core analogue means is provided with fracture surface filtrate (liquid and crack tip filtrate (liquid; Described water booster system is connected with rock core analogue means; Described central tube runs through and is arranged on rock core analogue means;
Heating tape can the temperature environment on abundant Simulation of Complex stratum; In advance test drilling fluid can be heated to simulated formation temperature in experimentation.
Described conveying system for drilling fluids comprises high precision piston pump, constant current constant voltage pump, pressure testing fluid-storing container, test drilling fluid reservoir vessel, crack tip filtrate collection container, fracture surface filtrate collection container and feed-line; Fracture surface filtrate (liquid is connected with fracture surface filtrate collection container by feed-line; Crack tip filtrate (liquid is connected with crack tip filtrate collection container by feed-line; High precision piston pump is connected on pressure testing fluid-storing container and test drilling fluid reservoir vessel simultaneously; Constant current constant voltage pump is connected on crack tip filtrate collection container, on fracture surface filtrate collection container;
Described Industrial Personal Computer (IPC) is connected with pressure sensor, displacement transducer, temperature pick up, constant current constant voltage pump and high precision piston pump.Industrial Personal Computer (IPC) gathers the parameters such as drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature automatically by data acquisition and procession software, and intuitively export in the mode such as real-time curve or flash demo, directly can also control the running parameter of constant current constant voltage pump, high precision piston pump simultaneously, easy and simple to handle, automaticity is high.
Preferred according to the present invention, described crack leakage kettle comprises kettle top cover, kettle bottom and kettle sleeve, and kettle top cover and kettle bottom are fixedly installed on top and the bottom of kettle sleeve respectively; Described rock core analog module comprises core holding unit and crack leak-off medium; The size that comprises described crack leak-off medium goes up leak-off dieelctric sheet and lower leak-off dieelctric sheet accordingly, upper leak-off dieelctric sheet and lower leak-off dieelctric sheet runs through respectively being provided with centre bore; Described central tube comprises upper center tube and lower center tube; Core holding unit comprises clamping disk and lower clamping disk, upper clamping disk is fixedly installed on kettle top cover, lower clamping disk is slidably arranged on the inside wall of kettle sleeve, upper clamping disk is vertical with the inside wall of kettle sleeve with the plane at lower clamping disk place, the medial surface of upper clamping disk and lower clamping disk is respectively arranged with groove, and the lateral surface of upper clamping disk, the lateral surface of lower clamping disk are provided with fracture surface filtrate (liquid and centre bore; Upper leak-off dieelctric sheet and lower leak-off dieelctric sheet embed in the groove of groove and the lower clamping disk being arranged on clamping disk respectively; One end of upper center tube run through be arranged on leak-off dieelctric sheet and upper clamping disk centre bore in, the other end by feed-line respectively with pressure testing fluid-storing container with test drilling fluid reservoir vessel and be connected; One end of lower center tube run through be arranged on lower leak-off dieelctric sheet and lower clamping disk centre bore in, the other end is connected with ball check valve; On the sidewall of kettle sleeve, between upper leak-off dieelctric sheet place plane and lower leak-off dieelctric sheet place plane, be provided with crack tip filtrate (liquid;
Described water booster system comprises pressurizing piston and fluid under pressure entrance; Described pressurizing piston is slidably arranged on the inside wall of kettle sleeve, and pressurizing piston, kettle bottom and kettle sleeve form pressurized fluid chamber; On the sidewall of kettle sleeve, the downside of pressurizing piston, is provided with fluid under pressure entrance; Lower clamping disk is connected with pressurizing piston; Fluid under pressure entrance is connected with constant current constant voltage pump; .
The fracture surface of the different permeability formations of described crack leak-off medium simulation; Constant current constant voltage pump displacing fluid force feed enters pressurization sap cavity, drives pressurizing piston to apply constant analog fracture closure pressure, the leakage of simulated implementation variable-width crack and shutoff process;
In experimentation, utilize high precision piston pump displacement to test drilling fluid reservoir vessel, under constant flow rate condition, drilling fluid will be tested and inject crack leakage kettle, and carry out borehole wall strengthening drilling fluid evaluation experimental; High precision constant current constant pressure pump is used for accurate control simulation formation pore pressure, simulation fracture clossing pressure, fully to simulate the temperature, pressure environment of actual formation; The test drilling fluid outlet section of crack leakage Fu body installs ball check valve, regulates its aperture can simulate with technique such as brill leakproof or static leak stopping etc.; Constant current constant voltage pump is utilized to apply simulated formation pore pressure at fracture surface and crack tip, the drilling fluid filtration of real-time collecting, the metering position such as fracture surface, crack tip; After crack shutoff band is formed, by improving simulated formation pore pressure, the experiment of crack shutoff band reverse pressure-bearing merit rating is carried out in simulation.
Preferred according to the present invention, described upper center tube is connected with feed-line by high pressure valve, and described heating tape is connected with temperature controller.The functions such as the air in discharge line, pressure release can be realized by switch high-pressure valve; Temperature controller ensures that the highest experimental temperature of heating tape reaches 150 DEG C, and controls temperature-controlled precision ± 1 DEG C.
Preferred according to the present invention, inside described upper leak-off dieelctric sheet, the plane at place and the plane at place, upper center tube end are in same plane; Inside leak-off dieelctric sheet, the plane at place and the plane at place, lower center tube end are in same plane.
Preferred according to the present invention, described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet and centre bore are through encapsulation process; Described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet are ceramic material or stainless steel.Ceramic material or stainless steel are in order to simulate the fracture surface of different permeability formations.
Preferred according to the present invention, be provided with fluid passage between described upper leak-off dieelctric sheet and upper clamping disk, between lower leak-off dieelctric sheet and lower clamping disk.Fluid passage is in order to collect crack tip and fracture surface filtrate.
Preferred according to the present invention, described feed-line is provided with pressure sensor; The bottom of described crack leakage kettle is provided with displacement transducer.Pressure sensor is used for the parameters such as Real-Time Monitoring drilling fluid injection pressure, simulation fracture clossing pressure, simulated formation pore pressure; Displacement transducer can the variable quantity of Real-Time Monitoring crack width.
Preferred according to the present invention, described crack leakage kettle, pressure testing fluid-storing container, test drilling fluid reservoir vessel, crack tip filtrate collection container and fracture surface filtrate collection container are respectively arranged with temperature pick up.Described temperature pick up is used for the temperature in Real-Time Monitoring crack leakage kettle and reservoir vessel.
Preferred according to the present invention, described kettle top cover, between kettle bottom and kettle sleeve; Between pressurizing piston and kettle sleeve, realize wiper seal by O RunddichtringO.
The present invention also provides a kind of utilize above-mentioned experimental facilities to carry out the method that drilling fluid simulated experiment strengthened by the HTHP borehole wall, comprises step as follows:
A, experimental facilities are tested:
Fixing crack leakage Fu body, connecting conveying pipe line; Open high pressure valve, utilize high precision piston pump displacement pressure testing fluid, the air in discharge line; Close high pressure valve, test and after confirming the wiper seal performance of whole experimental facilities, closedown high precision piston pump;
B, unlatching experimental facilities:
Open data acquisition and procession software, calibrating pressure sensor, displacement transducer, temperature pick up; Utilize constant current constant voltage pump to apply simulated formation pore pressure, simulation fracture clossing pressure, open temp controller and heating tape, start heating.
C, carry out simulated experiment;
After experimental temperature to be achieved, utilize high precision piston pump displacement to test drilling fluid and enter crack leakage kettle, start simulated experiment; The parameters such as Industrial Personal Computer (IPC) Real-time Collection drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature; Close high precision piston pump, constant current constant voltage pump, open high pressure valve; After pressure release, clean cycle pipeline, fluid reservoir, experiment terminates;
D, experimental result evaluation;
After experiment terminates, based on evaluation experimental result, optimize borehole wall strengthening property of drilling fluid further, as loss circulation material type, domain size distribution, mechanical property etc., again carry out above-mentioned evaluation experimental, finally reach optimum borehole wall strengthening effect.
Preferred according to the present invention, in described step c, also include operation as follows: Industrial Personal Computer (IPC) utilizes data acquisition and procession software automatically to gather drilling fluid injection pressure, filtrate volume, crack width variable quantity.
Data acquisition and procession software take WINDOWS as operating system platform, be that SDK is worked out with DELPHI, this software can automatically, the parameter such as Real-time Collection drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature, and intuitively export in the mode such as real-time curve or flash demo, directly can also control the running parameter of constant current constant voltage pump, high precision piston pump simultaneously, simple interface, easy and simple to handle, automaticity is high.
Advantage of the present invention is:
1, drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall of the present invention, under Different Strata condition can be simulated (as temperature, pressure, permeability etc.), the leakage in variable or fixed width crack and shutoff process, simulated implementation drilling fluid shutoff crack, borehole wall strengthening mechanism and with the brill characteristic research such as leakproof and static leak-stopping technique, study for borehole wall strengthening drilling liquid technology and provide a kind of experimental technique and research means;
2, the HTHP borehole wall of the present invention strengthens that drilling fluid simulated experimental facilities is cheap, simple to operate, experiment is by mistake little, multiple functional, can simulate kinds of experiments, be of great significance for promotion borehole wall strengthening Development of Drilling Fluids tool.
Accompanying drawing illustrates:
Fig. 1 is the structural representation that drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall of the present invention;
Fig. 2 is the structural representation of crack of the present invention leakage Fu body;
Fig. 3 is the experiment flow figure of experimental facilities of the present invention;
In figure: 1. crack leakage kettle; 2. pressure testing fluid-storing container; 3. test drilling fluid reservoir vessel; 4. crack tip filtrate collection container; 5. fracture surface filtrate collection container; 6. Industrial Personal Computer (IPC); 7-a ~ 7-d. pressure sensor; 8. ball check valve; 9. high precision piston pump; 10-a ~ 10-c. constant current constant voltage pump; 11. feed-lines; 12. high pressure valves; 13. temperature controllers; 14. kettle top covers; 15. kettle bottoms; 16. kettle sleeves; 17. core holding units; 18. crack leak-off media; 19. pressurizing piston; 20. heating tapes; 21. pressurization sap cavities; 22. displacement transducers; 23. temperature pick ups; 24. test drilling fluid entrances; 25. test drilling fluid outlet; 26. fracture surface filtrate (liquids; 27. crack tip filtrate (liquids; 28. fluid under pressure entrances; 29, upper center tube; 30, lower center tube.
Detailed description of the invention:
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited thereto.
Embodiment 1,
As shown in Figure 1-2.
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall, comprises crack leakage kettle system, conveying system for drilling fluids and Industrial Personal Computer (IPC) 6;
Described crack leakage pot systems turnkey draws together crack leakage kettle 1, water booster system, rock core analogue means, central tube and heating tape 20; Heating tape 20 and rock core analogue means are arranged on crack leakage kettle; Rock core analogue means is provided with fracture surface filtrate (liquid 26 and crack tip filtrate (liquid 27; Described water booster system is connected with rock core analogue means; Described central tube runs through and is arranged on rock core analogue means;
Heating tape 20 can the temperature environment on abundant Simulation of Complex stratum; In advance test drilling fluid can be heated to simulated formation temperature in experimentation.
Described conveying system for drilling fluids comprises high precision piston pump 9, constant current constant voltage pump 10, pressure testing fluid-storing container 2, test drilling fluid reservoir vessel 3, crack tip filtrate collection container 4, fracture surface filtrate collection container 5 and feed-line 11; Fracture surface filtrate (liquid 26 is connected with fracture surface filtrate collection container 5 by feed-line 11; Crack tip filtrate (liquid 27 is connected with crack tip filtrate collection container 4 by feed-line 11; High precision piston pump 9 is connected on pressure testing fluid-storing container 2 and test drilling fluid reservoir vessel 3 simultaneously; On crack tip filtrate collection container 4, on fracture surface filtrate collection container, 5 are connected to constant current constant voltage pump;
Described Industrial Personal Computer (IPC) is connected with pressure sensor, displacement transducer, temperature pick up, constant current constant voltage pump and high precision piston pump.Industrial Personal Computer (IPC) gathers the parameters such as drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature automatically by data acquisition and procession software, and intuitively export in the mode such as real-time curve or flash demo, directly can also control the running parameter of constant current constant voltage pump, high precision piston pump simultaneously, easy and simple to handle, automaticity is high.
Described crack leakage kettle 1 comprises kettle top cover, kettle bottom and kettle sleeve, and kettle top cover and kettle bottom are fixedly installed on top and the bottom of kettle sleeve respectively; Described rock core analog module comprises core holding unit 17 and crack leak-off medium 18; The size that comprises described crack leak-off medium 18 goes up leak-off dieelctric sheet and lower leak-off dieelctric sheet accordingly, upper leak-off dieelctric sheet and lower leak-off dieelctric sheet runs through respectively being provided with centre bore; Described central tube comprises upper center tube 29 and lower center tube 30; Core holding unit 17 comprises clamping disk and lower clamping disk, upper clamping disk is fixedly installed on kettle top cover, lower clamping disk is slidably arranged on the inside wall of kettle sleeve, upper clamping disk is vertical with the inside wall of kettle sleeve with the plane at lower clamping disk place, the medial surface of upper clamping disk and lower clamping disk is respectively arranged with groove, and the lateral surface of upper clamping disk, the lateral surface of lower clamping disk are provided with fracture surface filtrate (liquid 26 and centre bore; Upper leak-off dieelctric sheet and lower leak-off dieelctric sheet embed in the groove of groove and the lower clamping disk being arranged on clamping disk respectively; One end of upper center tube 29 run through be arranged on leak-off dieelctric sheet and upper clamping disk centre bore in, the other end by feed-line 11 respectively with pressure testing fluid-storing container 2 with test drilling fluid reservoir vessel 3 and be connected; One end of lower center tube 30 run through be arranged on lower leak-off dieelctric sheet and lower clamping disk centre bore in, the other end is connected with ball check valve 8; On the sidewall of kettle sleeve, between upper leak-off dieelctric sheet place plane and lower leak-off dieelctric sheet place plane, be provided with crack tip filtrate (liquid 27;
Described water booster system comprises pressurizing piston 19 and fluid under pressure entrance 28; Described pressurizing piston is slidably arranged on the inside wall of kettle sleeve, and pressurizing piston, kettle bottom and kettle sleeve form pressurized fluid chamber 21; On the sidewall of kettle sleeve, the downside of pressurizing piston, is provided with fluid under pressure entrance; Lower clamping disk is connected with pressurizing piston; Fluid under pressure entrance 28 is connected with constant current constant voltage pump 10-a.
The fracture surface of the different permeability formations of described crack leak-off medium simulation; Constant current constant voltage pump 10 displacing fluid force feed enters pressurization sap cavity 21, drives pressurizing piston 19 to apply constant analog fracture closure pressure, the leakage of simulated implementation variable-width crack and shutoff process;
In experimentation, utilize high precision piston pump 10 displacement to test drilling fluid reservoir vessel, under constant flow rate condition, drilling fluid will be tested and inject crack leakage kettle, and carry out borehole wall strengthening drilling fluid evaluation experimental; High precision constant current constant pressure pump 10 for accurate control simulation formation pore pressure, simulation fracture clossing pressure, fully to simulate the temperature, pressure environment of actual formation; The test drilling fluid outlet section of crack leakage Fu body installs ball check valve 8, regulates its aperture can simulate with technique such as brill leakproof or static leak stopping etc.; Constant current constant voltage pump 10 is utilized to apply simulated formation pore pressure at fracture surface and crack tip, the drilling fluid filtration of real-time collecting, the metering position such as fracture surface, crack tip; After crack shutoff band is formed, by improving simulated formation pore pressure, the experiment of crack shutoff band reverse pressure-bearing merit rating is carried out in simulation.
Embodiment 2,
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall as described in Example 1, and its difference is: described upper center tube 29 is connected with feed-line 11 by high pressure valve 12, and described heating tape 20 is connected with temperature controller.The function such as air, pressure release in discharge line 11 can be realized by switch high-pressure valve 12; Temperature controller ensures that the highest experimental temperature of heating tape 20 reaches 150 DEG C, and controls temperature-controlled precision ± 1 DEG C.
Embodiment 3,
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall as described in Example 1, and its difference is: inside described upper leak-off dieelctric sheet, the plane at place and the plane at place, upper center tube 29 end are in same plane; Inside leak-off dieelctric sheet, the plane at place and the plane at place, lower center tube 30 end are in same plane; Described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet and centre bore are through encapsulation process; Described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet are ceramic material or stainless steel.Ceramic material or stainless steel are in order to simulate the fracture surface of different permeability formations.
Embodiment 4,
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall as described in Example 1, and its difference is: be provided with fluid passage between described upper leak-off dieelctric sheet and upper clamping disk, between lower leak-off dieelctric sheet and lower clamping disk.Fluid passage is in order to collect crack tip and fracture surface filtrate.
Embodiment 5,
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall as described in Example 1, and its difference is: described feed-line is provided with pressure sensor; The bottom of described crack leakage kettle is provided with displacement transducer.Pressure sensor is used for the parameters such as Real-Time Monitoring drilling fluid injection pressure, simulation fracture clossing pressure, simulated formation pore pressure; Displacement transducer can the variable quantity of Real-Time Monitoring crack width.
Embodiment 6,
Drilling fluid simulated experimental facilities strengthened by a kind of HTHP borehole wall as described in Example 1, and its difference is: described crack leakage kettle 1, pressure testing fluid-storing container 2, test drilling fluid reservoir vessel 3, crack tip filtrate collection container 4 and fracture surface filtrate collection container 5 are respectively arranged with temperature pick up 23; Described kettle top cover, between kettle bottom and kettle sleeve; Between pressurizing piston 19 and kettle sleeve, realize wiper seal by O RunddichtringO.Described temperature pick up 23 is for the temperature in Real-Time Monitoring crack leakage kettle 1 and reservoir vessel.
Embodiment 7,
As Figure 1-3.
Utilize experimental facilities described in embodiment 1-6 to carry out the method that drilling fluid simulated experiment strengthened by the HTHP borehole wall, comprises step as follows:
A, experimental facilities are tested:
Fixing crack leakage Fu body, connecting conveying pipe line; Open high pressure valve, utilize high precision piston pump displacement pressure testing fluid, the air in discharge line; Close high pressure valve, test and after confirming the wiper seal performance of whole experimental facilities, closedown high precision piston pump;
B, unlatching experimental facilities:
Open data acquisition and procession software, calibrating pressure sensor, displacement transducer, temperature pick up; Utilize constant current constant voltage pump to apply simulated formation pore pressure, simulation fracture clossing pressure, open temp controller and heating tape, start heating.
C, carry out simulated experiment;
After experimental temperature to be achieved, utilize high precision piston pump displacement to test drilling fluid and enter crack leakage kettle, start simulated experiment; The parameters such as Industrial Personal Computer (IPC) Real-time Collection drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature; Close high precision piston pump, constant current constant voltage pump, open high pressure valve; After pressure release, clean cycle pipeline, fluid reservoir, experiment terminates;
D, experimental result evaluation;
After experiment terminates, based on evaluation experimental result, optimize borehole wall strengthening property of drilling fluid further, as loss circulation material type, domain size distribution, mechanical property etc., again carry out above-mentioned evaluation experimental, finally reach optimum borehole wall strengthening effect.
Embodiment 8,
The method of drilling fluid simulated experiment strengthened by a kind of HTHP borehole wall as described in Example 7, its difference is: in described step c, also includes operation as follows: Industrial Personal Computer (IPC) utilizes data acquisition and procession software automatically to gather drilling fluid injection pressure, filtrate volume, crack width variable quantity.
Claims (10)
1. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall, it is characterized in that: comprise crack leakage kettle system, conveying system for drilling fluids and Industrial Personal Computer (IPC);
Described crack leakage pot systems turnkey draws together crack leakage kettle, water booster system, rock core analogue means, central tube and heating tape; Heating tape and rock core analogue means are arranged on crack leakage kettle; Rock core analogue means is provided with fracture surface filtrate (liquid and crack tip filtrate (liquid; Described water booster system is connected with rock core analogue means; Described central tube runs through and is arranged on rock core analogue means;
Described conveying system for drilling fluids comprises high precision piston pump, constant current constant voltage pump, pressure testing fluid-storing container, test drilling fluid reservoir vessel, crack tip filtrate collection container, fracture surface filtrate collection container and feed-line; Fracture surface filtrate (liquid is connected with fracture surface filtrate collection container by feed-line; Crack tip filtrate (liquid is connected with crack tip filtrate collection container by feed-line; High precision piston pump is connected on pressure testing fluid-storing container and test drilling fluid reservoir vessel simultaneously; Constant current constant voltage pump is connected on crack tip filtrate collection container, on fracture surface filtrate collection container;
Described Industrial Personal Computer (IPC) is connected with pressure sensor, displacement transducer, temperature pick up, constant current constant voltage pump and high precision piston pump.
2. drilling fluid simulated experimental facilities strengthened by a HTHP borehole wall as claimed in claim 1, it is characterized in that: crack leakage kettle comprises kettle top cover, kettle bottom and kettle sleeve, and kettle top cover and kettle bottom are fixedly installed on top and the bottom of kettle sleeve respectively; Described rock core analog module comprises core holding unit and crack leak-off medium; The size that comprises described crack leak-off medium goes up leak-off dieelctric sheet and lower leak-off dieelctric sheet accordingly, upper leak-off dieelctric sheet and lower leak-off dieelctric sheet runs through respectively being provided with centre bore; Described central tube comprises upper center tube and lower center tube; Core holding unit comprises clamping disk and lower clamping disk, upper clamping disk is fixedly installed on kettle top cover, lower clamping disk is slidably arranged on the inside wall of kettle sleeve, upper clamping disk is vertical with the inside wall of kettle sleeve with the plane at lower clamping disk place, the medial surface of upper clamping disk and lower clamping disk is respectively arranged with groove, and the lateral surface of upper clamping disk, the lateral surface of lower clamping disk are provided with fracture surface filtrate (liquid and centre bore; Upper leak-off dieelctric sheet and lower leak-off dieelctric sheet embed in the groove of groove and the lower clamping disk being arranged on clamping disk respectively; One end of upper center tube run through be arranged on leak-off dieelctric sheet and upper clamping disk centre bore in, the other end by feed-line respectively with pressure testing fluid-storing container with test drilling fluid reservoir vessel and be connected; One end of lower center tube run through be arranged on lower leak-off dieelctric sheet and lower clamping disk centre bore in, the other end is connected with ball check valve; On the sidewall of kettle sleeve, between upper leak-off dieelctric sheet place plane and lower leak-off dieelctric sheet place plane, be provided with crack tip filtrate (liquid;
Described water booster system comprises pressurizing piston and fluid under pressure entrance; Described pressurizing piston is slidably arranged on the inside wall of kettle sleeve, and pressurizing piston, kettle bottom and kettle sleeve form pressurized fluid chamber; On the sidewall of kettle sleeve, the downside of pressurizing piston, is provided with fluid under pressure entrance; Lower clamping disk is connected with pressurizing piston; Fluid under pressure entrance is connected with constant current constant voltage pump.
3. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 2, it is characterized in that: described upper center tube is connected with feed-line by high pressure valve, and described heating tape is connected with temperature controller.
4. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 2, it is characterized in that: inside described upper leak-off dieelctric sheet, the plane at place and the plane at place, upper center tube end are in same plane; Inside leak-off dieelctric sheet, the plane at place and the plane at place, lower center tube end are in same plane.
5. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 2, it is characterized in that: described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet and centre bore are through encapsulation process; Described upper leak-off dieelctric sheet and lower leak-off dieelctric sheet are ceramic material or stainless steel; Fluid passage is provided with between described upper leak-off dieelctric sheet and upper clamping disk, between lower leak-off dieelctric sheet and lower clamping disk.
6. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 1, it is characterized in that: described feed-line is provided with pressure sensor; The bottom of described crack leakage kettle is provided with displacement transducer.
7. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 2, it is characterized in that: described crack leakage kettle, pressure testing fluid-storing container, test drilling fluid reservoir vessel, crack tip filtrate collection container and fracture surface filtrate collection container are respectively arranged with temperature pick up.
8. a drilling fluid simulated experimental facilities strengthened by the HTHP borehole wall as claimed in claim 2, it is characterized in that: described kettle top cover, between kettle bottom and kettle sleeve; Between pressurizing piston and kettle sleeve, realize wiper seal by O RunddichtringO.
9. utilize experimental facilities described in claim 1-8 any one to carry out the method that drilling fluid simulated experiment strengthened by the HTHP borehole wall, comprise step as follows:
A, experimental facilities are tested:
Fixing crack leakage Fu body, connecting conveying pipe line; Open high pressure valve, utilize high precision piston pump displacement pressure testing fluid, the air in discharge line; Close high pressure valve, test and after confirming the wiper seal performance of whole experimental facilities, closedown high precision piston pump;
B, unlatching experimental facilities:
Open data acquisition and procession software, calibrating pressure sensor, displacement transducer, temperature pick up; Utilize constant current constant voltage pump to apply simulated formation pore pressure, simulation fracture clossing pressure, open temp controller and heating tape, start heating;
C, carry out simulated experiment;
After experimental temperature to be achieved, utilize high precision piston pump displacement to test drilling fluid and enter crack leakage kettle, start simulated experiment; The parameters such as Industrial Personal Computer (IPC) Real-time Collection drilling fluid injection pressure, fracture closure pressure, crack width variable quantity, experimental temperature; Close high precision piston pump, constant current constant voltage pump, open high pressure valve; After pressure release, clean cycle pipeline, fluid reservoir, experiment terminates;
D, experimental result evaluation;
After experiment terminates, based on evaluation experimental result, optimize borehole wall strengthening property of drilling fluid further, as loss circulation material type, domain size distribution, mechanical property etc., again carry out above-mentioned evaluation experimental, finally reach optimum borehole wall strengthening effect.
10. utilize experimental facilities described in claim 9 to carry out the method that drilling fluid simulated experiment strengthened by the HTHP borehole wall, it is characterized in that: in described step c, also include operation as follows, Industrial Personal Computer (IPC) utilizes data acquisition and procession software automatically to gather drilling fluid injection pressure, filtrate volume, crack width variable quantity.
Priority Applications (1)
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| CN105041302A (en) * | 2015-08-26 | 2015-11-11 | 中国海洋石油总公司 | Simulation experimental method and device for circulation of slurry in marine riser in deep sea drilling well |
| CN105223007A (en) * | 2015-09-29 | 2016-01-06 | 中国海洋石油总公司 | Oil/gas Well rupture disk performance test evaluating apparatus |
| CN106198871A (en) * | 2016-07-07 | 2016-12-07 | 中国石油集团川庆钻探工程有限公司 | A kind of evaluation methodology of water-base drilling fluid seal-off effect |
| CN108387685A (en) * | 2018-01-09 | 2018-08-10 | 中国石油大学(华东) | The method and apparatus of the weak consolidated formation drilling fluid stabilizing borehole evaluation of effect of deep water superficial part |
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| CN105223007A (en) * | 2015-09-29 | 2016-01-06 | 中国海洋石油总公司 | Oil/gas Well rupture disk performance test evaluating apparatus |
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| CN112082620A (en) * | 2019-06-13 | 2020-12-15 | 中石化石油工程技术服务有限公司 | Automatic measuring device for drilling fluid filtration loss |
| CN110541703B (en) * | 2019-08-19 | 2020-09-25 | 中国石油大学(华东) | Method and system for determining well wall strengthening conditions and method and system for strengthening well wall |
| CN110541703A (en) * | 2019-08-19 | 2019-12-06 | 中国石油大学(华东) | Method and system for determining well wall strengthening conditions and method and system for strengthening well wall |
| CN110954451A (en) * | 2019-12-06 | 2020-04-03 | 中国石油天然气股份有限公司 | Application concentration and application particle size optimization method of flexible gel particle plugging agent |
| CN111749651A (en) * | 2020-05-06 | 2020-10-09 | 中国地质大学（武汉） | Oil gas leakage collecting and constant-pressure device |
| CN111581819A (en) * | 2020-05-08 | 2020-08-25 | 中国石油大学(华东) | Method for simulating variable fracture in stratum and optimization method of leakage plugging liquid |
| US11650194B2 (en) * | 2021-01-15 | 2023-05-16 | Chengdu University Of Technology | Dynamic damage evaluation instrument of drilling fluid based on glass core |
| CN113533655B (en) * | 2021-07-23 | 2022-09-16 | 中国石油大学(北京) | Device for simulating stratum respiration effect and control method |
| CN113533655A (en) * | 2021-07-23 | 2021-10-22 | 中国石油大学(北京) | Device for simulating stratum respiration effect and control method |
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| CN114624176A (en) * | 2021-10-09 | 2022-06-14 | 中国石油天然气集团有限公司 | System and experimental method for testing lubricating performance of drilling fluid of horizontal well and extended reach well |
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| CN115628032B (en) * | 2022-11-10 | 2024-04-26 | 中国石油天然气集团有限公司 | Experimental device and method for multi-layer leakage simulation of fractured stratum under directional well gas invasion condition |
| CN116498303A (en) * | 2023-03-13 | 2023-07-28 | 中国石油大学(华东) | Device and method for testing overflow and leakage coexistence of high-inclination well drill in fractured stratum |
| CN116498303B (en) * | 2023-03-13 | 2023-09-22 | 中国石油大学(华东) | Device and method for testing overflow and leakage coexistence of high-inclination well drill in fractured stratum |
| CN116256239A (en) * | 2023-05-16 | 2023-06-13 | 成都理工大学 | Visual device and method for testing pressure bearing performance of plugging band considering fluid loss |
| CN116297162A (en) * | 2023-05-17 | 2023-06-23 | 成都理工大学 | Device and method for testing friction coefficient of discrete particle plugging material |
| CN116337662A (en) * | 2023-05-24 | 2023-06-27 | 山东科技大学 | Temporary plugging phase control test method for alternately injecting low-temperature fluid and water into ice crystals |
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