CN101408104B - High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system - Google Patents
High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system Download PDFInfo
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- CN101408104B CN101408104B CN200810197973A CN200810197973A CN101408104B CN 101408104 B CN101408104 B CN 101408104B CN 200810197973 A CN200810197973 A CN 200810197973A CN 200810197973 A CN200810197973 A CN 200810197973A CN 101408104 B CN101408104 B CN 101408104B
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Abstract
The invention discloses an evaluation experimental system of plugging of high-fidelity simulated formation drilling. The system at least comprises a pressure device, a plugging liquid container, a pressure meter and a hydraulic pump; wherein, a pressure system is connected with a high-fidelity loss zone simulator through the plugging liquid container. The invention can highly meet the requirements of differential pressure at the bottom of the drilling, the property and size of the added plugging materials and the interaction of the added plugging materials and the formation according to the physical, chemical and mechanical property of lost rock and the main similarity conditions of geometric, chemical, dynamic, motion and material similarity and the like of simulated formation fracture. The device can be used repeatedly, has low cost and convenient operation and has wide application value and market prospect.
Description
Technical field
The present invention relates to a kind of high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system, belong to the probing field.
Background technology
The challenge that leakage is ubiquity in the oil-gas drilling process, often run into.Because the down-hole complex accident that leakage causes, it is very harmful that drilling well, completion are constructed, and is the problem that domestic and international petroleum works circle are paid close attention to always.In the drillng operation,, not only incur loss through delay drilling time in case miss; The loss drilling fluid, infringement oil-gas Layer etc., but also possibly cause that borehole well instability causes a series of complex situations and accidents such as well slough, bit freezing, blowout; Even cause well to be scrapped, cause heavy economic losses.
Formation leakage situation and rock physics, chemistry and mechanical property, the character of the loss circulation material that adds in bottom hole pressure difference, the mud, size, the interaction that adds material and stratum has confidential relation.At present, the domestic and international static leak stopping evaluation experimental facilities that has, its basic structure all is to adopt end pressurization basically, and the middle part is a vertical cylinder, and the bottom is used for discharge opeing for the pipeline of band valve.Simulation leakage stratum is filled with slot plate and ballotini or little steel ball etc. by elder generation in the cylinder, adds the leak stopping slurries on drop ply top, and drive units such as use air pressure are pressed into simulated formation with slurries, estimate the performance of loss circulation material.Because simulated formation and the serious distortion of actual formation character, difference is too big as a result to cause experimental result and The field.Because ubiquity leakage in a lot of exploration of oil and gas field of China and the exploitation; Develop a cover high fidelity simulating stratum leak stopping evaluation experimental facilities, the plugging effect of under experiment lab simulation bottom hole temperature (BHT), pressure, formation properties, stratum opening pressure and liquid recurrent state, estimating loss circulation material is very necessary to exploration of oil and gas field and exploitation.
Summary of the invention
The object of the invention just is to overcome the deficiency of above-mentioned prior art; A kind of high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system is provided; This leakage of invention simulated formation rock physics, chemistry and mechanical property, the loss circulation material of the character of the loss circulation material that adds in bottom hole pressure difference, the mud, size and adding and the interaction on stratum.This system mainly presses compression system promptly to add parts such as temperature control system by compression system, leakage-stop liquid container, high-fidelity drop ply simulator, ring to form
Realize that the technical scheme that goal of the invention adopts is: a kind of high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system; At least comprise water booster system, leakage-stop liquid container, pressure meter and hydraulic pump, compression system is connected with high-fidelity drop ply simulator through the leakage-stop liquid container.
Wherein high-fidelity drop ply simulator comprises simulation drop ply, high temperature high voltage resistant packing element, clamper, plug and heater; The simulation drop ply is filled in to be split in the core barrel; Split core barrel and be with the high temperature high voltage resistant packing element outward; The high temperature high voltage resistant packing element is equipped with clamper outward, clamper overcoat having heaters, and the core barrel of splitting that is filled with the simulation drop ply is equipped with plug in two ends up and down.
Described cross section of splitting core barrel is an annulus, splits core barrel and is made up of two semicircular core barrels, realizes seamless link at connecting portion through pegging graft each other.This connected mode helps installing and opening, and after pressure acquires a certain degree, splits core barrel to circumferentially opening certain distance, and open in simulated formation hole, crack under the pressure of leakage-stop liquid.After leakage-stop liquid gets into the stratum and keeps certain pressure, around splitting core barrel, apply hydraulic pressure, simulated formation pressure makes that leakage-stop liquid is counter to be arranged.Experiment is opened and split core barrel after finishing, and measures the degree of depth and intensity that leakage-stop liquid gets into the stratum, can use repeatedly, and is easy and simple to handle, good economy performance.
Described clamper is " [] " shape; Clamper passes through the fastening high temperature high voltage resistant packing element in two ends up and down; Clamper plays the effect that seals leak stopping up and down and high temperature high voltage resistant packing element, forms annular space between clamper middle part and the high temperature high voltage resistant packing element, and the annular space place is connected to hydraulic pump.
The centre of described plug has a through hole, and the through hole of upper plug head is connected with plunger displacement pump through pressure piping, and leakage-stop liquid gets into the simulation drop ply from the through hole of upper plug head; The through hole of lower end cap directly is connected with container, and the leakage-stop liquid that oozes out from the stratum is received the container through the through hole of lower end cap.During according to the experiment needs, can also pass through the lower through-hole time pressure, leakage-stop liquid is clamp-oned the ability of resisting oil-air pressure behind the stratum under the simulated formation oil-air pressure.
The high temperature high voltage resistant packing element that the present invention uses for anti-more than 150 ℃ temperature, bear the packing element of the above pressure of 60Mpa; Be enclosed within plug-in type during work and split the core barrel outside; And be connected with plug at two ends; Play the sealing simulated formation effect, when experiment needs, can in annular space, exert pressure, and pressure is delivered to simulated formation through splitting core barrel, detect anti-row's situation of the loss circulation material of under strata pressure, clamp-oning the stratum.
Be provided with pressure meter between above-mentioned compression system and the leakage-stop liquid container, be provided with pressure meter between leakage-stop liquid container and the high-fidelity drop ply simulator, be provided with pressure meter between annular space place and the hydraulic pump.
Said heating system is the double plunger high-pressure metering pump, this pump maximum pump discharge 13L/h, and maximum pressure 50Mpa, plunger displacement pump is pressed into simulated formation with leakage-stop liquid.Used working media is a clear water, preferred distilled water.
The leakage-stop liquid container is used to store leakage-stop liquid, operating pressure 40MPa, and volume 2000mL, container are piston cylinder operator, can leakage-stop liquid and fluid under pressure be isolated.
When using this experimental system, at first the simulated formation material is packed into and splits core barrel, will split pack into the rubber tube of high temperature resistance high pressure of core barrel then; Utilization adds holds device rubber tube is stepped up; Install upper and lower plug, in the through hole of upper plug head, connect pressure piping.Utilize plunger displacement pump that leakage-stop liquid is pressed into simulated formation and behind certain pressure, keep the pressure certain hour; If experiment needs; Utilize the annular space of hydraulic pump between clamper middle part and high temperature high voltage resistant packing element to apply hydraulic pressure; Hydraulic pressure is delivered to the core barrel that makes of splitting core barrel on every side through rubber tube and playbacks, and makes anti-row of leakage-stop liquid of pressure simulation strata pressure, tests the size of its anti-discharge capacity.After treating that experiment finishes, open and split the degree of depth that core barrel measurement leakage-stop liquid is clamp-oned simulated formation.In experiment,, when experiment needs, simulated formation added and keep certain temperature through heater simulated formation temperature.
Device provided by the invention is the HTHP analogue experiment installation on high fidelity simulation leakage stratum; This device is aspect drop ply; Can not only satisfy at present domestic all carry out the leak stopping experiment to conventional leakage module (man-made fracture piece, circular hole model, ladder etc.), and can simulate true drop ply characteristic and experimentize.Aspect pressure, can simulate burden pressure, the simulation of drop ply pressure break, the anti-row function of strata pressure.On temperature, can be that the subsurface temperature size is carried out the leak stopping experiment through the heating apparatus simulates real.
This development of Experimental System is the evaluation of excellent plugging drilling fluid performance and the confirming of leak-stopping technique of sealing agent, a kind of science, effective experimental evaluation method is provided, for relevant research and production provide scientific basis
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is further described.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a high-fidelity drop ply simulator sectional view among Fig. 1.
Fig. 3 is a sectional view of splitting core barrel.
Among the figure, 1. plunger displacement pump, 2. pressure meter, 3. leakage-stop liquid container, 4. pressure meter; 5. high-fidelity drop ply simulator, 6. liquid outlet, 7. pressure meter, 8. hydraulic pump; 9. the simulation drop ply is 10. split core barrel, 11. high temperature high voltage resistant tubes, 12. heaters; 13. upper plug head, 14. clampers, 15. annular spaces, 16. lower end caps.
The specific embodiment
Structure of the present invention is as shown in Figure 1, and high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system comprises water booster system plunger displacement pump 1, leakage-stop liquid container 3, pressure meter and hydraulic pump 8, and plunger displacement pump 1 is connected with high-fidelity drop ply simulator 5 through leakage-stop liquid container 3.Be provided with pressure meter 2 between plunger displacement pump 1 and the leakage-stop liquid container 3, be provided with pressure meter 4 between leakage-stop liquid container 3 and the high-fidelity drop ply simulator 5, be provided with pressure meter 7 between annular space 15 places and the hydraulic pump 9.Plunger displacement pump 1 this pump maximum pump discharge 13L/h, maximum pressure 50Mpa, plunger displacement pump is pressed into simulated formation with leakage-stop liquid.Used working media is a clear water, preferred distilled water.Leakage-stop liquid container 3 is used to store leakage-stop liquid, operating pressure 40MPa, and volume 2000mL, container are piston cylinder operator, can leakage-stop liquid and fluid under pressure be isolated.
The sectional view of high-fidelity drop ply simulator 5 is as shown in Figure 2; High-fidelity drilling stratum leakage analogue means; Comprise simulation drop ply 9, high temperature high voltage resistant packing element 11, clamper 14, plug and heater 12, simulation drop ply 9 is filled in to be split in the core barrel 10, splits the core barrel 10 outer high temperature high voltage resistant packing elements 11 that are with; The high temperature high voltage resistant packing element 11 outer clampers 14 that are equipped with; Clamper 14 overcoat having heaters 12, the core barrel 10 of splitting that is filled with simulation drop ply 9 is provided with upper plug head 13, and the lower end is provided with lower end cap 16.Clamper 14 is " [] " shape, and clamper 14 passes through the fastening high temperature high voltage resistant packing element 11 in two ends up and down, forms annular space 15 between clamper 14 middle parts and the high temperature high voltage resistant packing element, and clamper 14 plays the effect that seals leak stopping up and down and high temperature high voltage resistant packing element 11.
Splitting core barrel 10 cross sections is annulus, splits core barrel and is made up of two semicircular core barrels, realizes seamless link at connecting portion through pegging graft each other, and its sectional view is as shown in Figure 3.
The high temperature high voltage resistant packing element that the present invention uses for anti-more than 150 ℃ temperature, bear the packing element of the above pressure of 60Mpa; Be enclosed within plug-in type during work and split the core barrel outside; And be connected with plug at two ends; Play the sealing simulated formation effect, when experiment needs, can in annular space, exert pressure, and pressure is delivered to simulated formation through splitting core barrel, detect anti-row's situation of the loss circulation material of under strata pressure, clamp-oning the stratum.
When using this device, at first the simulated formation material is packed into and splits core barrel, will split pack into the rubber tube of high temperature resistance high pressure of core barrel then, utilize to add and hold device rubber tube is stepped up, install upper and lower plug, in the through hole of upper plug head, connect pressure piping.Utilize plunger displacement pump that leakage-stop liquid is pressed into simulated formation and behind certain pressure, keep the pressure certain hour; If experiment needs; Utilize the annular space of hydraulic pump between clamper middle part and high temperature high voltage resistant packing element to apply hydraulic pressure; Hydraulic pressure through rubber tube be delivered to split core barrel around core barrel is classified as, make anti-row of leakage-stop liquid of pressure simulation strata pressure, test the size of its anti-discharge capacity.After treating that experiment finishes, open and split the degree of depth that core barrel measurement leakage-stop liquid is clamp-oned simulated formation.In experiment,, when experiment needs, simulated formation added and keep certain temperature through heater simulated formation temperature.
Simulation drop ply modular system is installed in one and can rotates on 360 ° the support, so that operation.
Claims (7)
1. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system is characterized in that: comprise water booster system, leakage-stop liquid container, pressure meter and hydraulic pump at least, water booster system is connected with high-fidelity drop ply simulator through the leakage-stop liquid container; Wherein high-fidelity drop ply simulator comprises simulation drop ply, high temperature high voltage resistant packing element, clamper, plug and heater; The simulation drop ply is filled in to be split in the core barrel, splits core barrel and is with the high temperature high voltage resistant packing element outward, and the high temperature high voltage resistant packing element is equipped with clamper outward; Clamper overcoat having heaters; The core barrel of splitting that is filled with the simulation drop ply is equipped with plug in two ends up and down, and clamper is " [] " shape, and clamper passes through the fastening high temperature high voltage resistant packing element in two ends up and down; Form annular space between clamper middle part and the high temperature high voltage resistant packing element, the annular space place is connected to hydraulic pump.
2. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 1; It is characterized in that: the cross section of splitting core barrel is an annulus; Split core barrel and form, realize seamless link through pegging graft each other at connecting portion by two semicircular core barrels.
3. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 1; It is characterized in that: be provided with pressure meter between water booster system and the leakage-stop liquid container; Be provided with pressure meter between leakage-stop liquid container and the high-fidelity drop ply simulator, be provided with pressure meter between annular space place and the hydraulic pump.
4. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 1; It is characterized in that: the centre of plug has a through hole; The through hole of upper plug head is connected with water booster system through pressure piping, and leakage-stop liquid gets into the simulation drop ply from the through hole of upper plug head; The through hole of lower end cap directly is connected with container, and the leakage-stop liquid that oozes out from the stratum is received the container through the through hole of lower end cap.
5. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 1 is characterized in that: water booster system is the double plunger high-pressure metering pump, and this pump maximum pump discharge is 13L/h, and maximum pressure is 50Mpa, and used working media is a clear water.
6. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 5 is characterized in that: the used working media of double plunger high-pressure metering pump is a distilled water.
7. high fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system according to claim 1 is characterized in that: the leakage-stop liquid container is a piston cylinder operator, in order to leakage-stop liquid and fluid under pressure are isolated.
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| CN200810197973A CN101408104B (en) | 2008-11-28 | 2008-11-28 | High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system |
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| CN200810197973A CN101408104B (en) | 2008-11-28 | 2008-11-28 | High fidelity simulating stratum well-drilling leakage-plugging evaluation experimental system |
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| CN101408104B true CN101408104B (en) | 2012-10-17 |
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| CN102071967B (en) * | 2011-01-26 | 2013-06-05 | 中国科学院武汉岩土力学研究所 | Filling simulator for salt rock cavern |
| CN102748015B (en) * | 2011-04-22 | 2015-08-26 | 中国石油化工股份有限公司 | A kind of strata pressure analogue means and method |
| CN103510944B (en) * | 2012-06-28 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of High Temperature High Pressure closure/prevent telling simulating-estimating device and its evaluation methodology |
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