CN1332195C - High temperature, high pressure core dynamic harm valuation test instrument - Google Patents

High temperature, high pressure core dynamic harm valuation test instrument Download PDF

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Publication number
CN1332195C
CN1332195C CNB2004100306371A CN200410030637A CN1332195C CN 1332195 C CN1332195 C CN 1332195C CN B2004100306371 A CNB2004100306371 A CN B2004100306371A CN 200410030637 A CN200410030637 A CN 200410030637A CN 1332195 C CN1332195 C CN 1332195C
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CN
China
Prior art keywords
pressure
rock core
highly pressurised
pressurised liquid
measuring point
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CNB2004100306371A
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Chinese (zh)
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CN1677082A (en
Inventor
余维初
鄢捷年
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中国石油天然气集团公司
长江大学
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Priority to CNB2004100306371A priority Critical patent/CN1332195C/en
Publication of CN1677082A publication Critical patent/CN1677082A/en
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Publication of CN1332195C publication Critical patent/CN1332195C/en

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Abstract

The present invention relates to a dynamic damage evaluating tester with high temperature and high pressure for a rock core, which belongs to the field of protection experimental equipment for an oil gas layer in the exploration and the exploitation of oil. The present invention is composed of an advection pump, a mud pump, a high pressure liquid tank, a rock core holder with multiple measuring points, a flowmeter, an air supply, a pressure sensor, a ring pressing pump, a back pressure controller, a data acquisition unit, a computer, etc., wherein end faces of the rock core holder with multiple measuring points circulate. The intrinsic permeability value of each portion of the rock core is measured without taking out the rock core under the condition of simulating the temperature, the pressure and the flow rate of the stratum, and fluid entering a well in the high pressure liquid tank is driven by the mud pump to measure the permeability value of each portion of the rock core. The impaired deepness and the impaired degree of each portion of the rock core, which are caused by the fluid entering a well, are evaluated, and thus, a system of drilling fluid and completion fluid for protecting the oil gas layer is preferred.

Description

High Temperature High Pressure rock core The dynamic damage evaluation test instrument
Affiliated technical field:
The present invention relates to a kind of petroleum industry lab simulation entry well fluid under stratum high-temperature, high pressure and flow state to the intrusion of reservoir and the degree of depth and the degree of invading reservoir; simultaneously can also carry out the evaluation test of the various susceptibility aspect of reservoir; the High Temperature High Pressure rock core The dynamic damage evaluation test instrument of preferred entry well fluid prescription belongs to reservoir protection experimental facilities field in the petroleum exploration and development.
Background technology:
Protecting oil reservoir, preventing to damage is a systems engineering through oil gas well exploratory development overall process.The internal cause of formation damage is the character of hydrocarbon zone itself, and as lithology, rerum natura and local water characteristic (water type, salinity, pH value), and the external cause of formation damage is to enter the incompatibility or the incompatibility of the outside fluid of oil reservoir.Therefore, the compatibility of estimating all entry well fluids is to implement the element task of oil layer protection technology, and finish this work the most direct, the most reliable and the most real method be to use the core experiment technology to carry out the oil reservoir rock core flowing experiment.
The intrusion infringement of various pit shaft working fluids such as drilling fluid, grout, well completion fluid, perforating fluid is first ring of reservoir damage.When positive pressure differential was opened oil reservoir, the solid phase of working fluid and liquid phase entered oil reservoir inevitably, thus the various susceptibility of stopping up the hydrocarbon zone passage and bringing out reservoir,, water-sensitive quick, acid-sensitive, infringement such as salt is quick, alkali is quick as speed.Obviously, the formation damage degree of depth is relevant with working fluid intrusion amount with degree of damage, and the intrusion amount is relevant with factors such as physical properties of rock, drilling well pressure reduction, mud property and activity durations.Therefore, rock core flowing experiment by the simulation drilling process, for estimating the formation damage degree of depth and degree, thereby preferred working fluid, can the design in particular for the completion perforating operation provides parameter and foundations such as penetration depth, be to be related to find hydrocarbon zone, correctly estimate the key that can its storage and collection performance and oil gas well obtain high yield.
At present, domestic have only the entry well fluid infringement device of single simulation drilling well and measure the multistage permeability gradometer that rock core is subjected to the entry well fluid infringement degree of depth and degree.But reservoir protection work runs through each production run of oil-gas exploration and development, is one and relates to the multi-disciplinary technology of forming a complete and comprehensive system for collecting real estate fees, and above-mentioned apparatus far can not satisfy demand of practical production.Therefore, develop can simulation well under under high temperature, high pressure and the condition of work that flows various entry well fluids very great to the indoor evaluation appts meaning of the formation damage degree and the degree of depth, to satisfy the needs that the reservoir protection reality of work is produced.
Summary of the invention:
The objective of the invention is to: provide a kind of sub-surface of simulation well truly condition to carry out the The dynamic damage that rock core is subjected to entry well fluid; and the situation of change of on same instrument, measuring infringement front and back core permeability, thereby can optimize the respond well drilling fluid of protection hydrocarbon zone, the High Temperature High Pressure rock core The dynamic damage evaluation test instrument of completion fluid system.
The present invention realizes above-mentioned purpose by following technical solution:
In High Temperature High Pressure rock core The dynamic damage evaluation test instrument, end face round-robin multi-measuring point core holding unit is from outside to inside by the columniform hot jacket that adds, three layers of composition of cover in clamper stainless steel urceolus and the rubber, left end is shaped on a fluid passage and the left plug that has center pit by being threaded, right-hand member has a right plug that has center pit by being threaded, the upper end of left end fluid passage is connected the highly pressurised liquid pot bottom by pressurized pipeline with flowmeter, the lower end of fluid passage connects steam piano by pressurized pipeline, and steam piano connects the highly pressurised liquid pot bottom by pressurized pipeline; The left end of end face round-robin multi-measuring point core holding unit connects back pressure controller and electronic balance by left plug with holes, and right-hand member connects constant-flux pump and back pressure controller and electronic balance by right plug with holes; The top of end face round-robin multi-measuring point core holding unit is shaped at least three pressure taps, and pipeline is housed in the pressure tap, and an end of pipeline passes to overlap in the rubber and communicates with the laboratory sample rock core, and the other end of pipeline is equipped with the pressure transducer that is equipped with valve; The bottom of multi-measuring point core holding unit is shaped on a ring and presses the hole, is connected with the ring press pump by pipeline.Double-layer sleeve structure is adopted in the bottom of highly pressurised liquid jar, the outer tube that is connected with steam piano is communicated with the highly pressurised liquid pot bottom and is concordant, the inner sleeve that is connected with flowmeter places in the outer tube below the bottom of highly pressurised liquid jar, and its endpiece surpasses the bottom 3-5cm of highly pressurised liquid jar.
The present invention compared with prior art has following beneficial effect:
Solve permeability gradient tester and can only measure the original and undermined permeability of rock core afterwards of rock core, can not on same instrument, carry out the The dynamic damage experiment of rock core; And the experiment of the High Temperature High Pressure The dynamic damage of High Temperature High Pressure dynamic filtration apparatus is to adopt the stirring-type structure, forms shear rate at the rock core end face; And adopt High-power Mud Pump abroad and make the mud circulation of opening a way, can not realize the closed cycle under the high-temperature and high-pressure conditions, the core permeability before and after the infringement adopts the problem of one section test of single-point.The present invention can carry out the The dynamic damage experiment to formation core fully under the condition of simulation downhole temperature, pressure and rate of flow of fluid; and do not need to load and unload again rock core and just can on same instrument and equipment, measure the permeability variation situation of the undermined front and back of rock core, thereby optimize drilling fluid and the completion fluid system that satisfies the technical requirement of protection hydrocarbon zone.And volume is little, and cost is low, tests very easy to use.
Description of drawings:
Fig. 1 is the structural representation of High Temperature High Pressure The dynamic damage evaluation test instrument;
Fig. 2 is the connection synoptic diagram of High Temperature High Pressure The dynamic damage evaluation test instrument;
Fig. 3 is the structural representation of end face round-robin multi-measuring point core holding unit;
Fig. 4 is the syndeton synoptic diagram of highly pressurised liquid jar and pipeline.
Among the figure: 1. source of the gas, 2. high-pressure pressure-reducing valve, 3. highly pressurised liquid jar, 4. steam piano, 5. flowmeter, 6. electronic balance, 7. back pressure controller, 8. ring press pump, 9. end face round-robin multi-measuring point core holding unit, 10. valve, 11. pressure transducers, 12. constant-flux pumps, 13. tapping valve, 14. data acquisition units, 15. computing machines, 16. add hot jacket, 17. left plugs, 18. fluid passages, 19. pressure tap, 20. pressurized pipelines, 21. clamper stainless steel urceolus, 22. cover in the rubber, 23. rock cores, 24. right plugs, 25. ring is pressed hole, 26. glands, 27. pistons, 28. highly pressurised liquid jar heating jacket, 29. outer tubes, 30. inner sleeves, 31. control line, 32. temperature sensors, 33. instrument box.
Embodiment:
This High Temperature High Pressure rock core The dynamic damage evaluation test instrument is by source of the gas (1), high-pressure pressure-reducing valve (2), highly pressurised liquid jar (3), steam piano (4), flowmeter (5), electronic balance (6), back pressure controller (7), ring press pump (8), end face round-robin multi-measuring point core holding unit (9), valve (10), pressure transducer (11), constant-flux pump (12), tapping valve (13), data acquisition unit (14), computing machine (15), add hot jacket (16), left side plug (17), fluid passage (18), pressure tap (19), pressurized pipeline (20), clamper stainless steel urceolus (21), cover (22) in the rubber, rock core (23), right plug (24), ring is pressed hole (25), gland (26), piston (27), highly pressurised liquid jar heating jacket (28), outer tube (29), inner sleeve (30), control line (31), temperature sensor (32), instrument box (33) is formed.Highly pressurised liquid jar (3), steam piano (4), ring press pump (8) and constant-flux pump (12) place the bottom of instrument box (33), end face round-robin multi-measuring point core holding unit (9) is equipped with on the top of instrument box (33), the and arranged on left and right sides of end face round-robin multi-measuring point core holding unit (9) respectively is connected with a back pressure controller (7) and electronic balance (6), and source of the gas (1), high-pressure pressure-reducing valve (2), data acquisition unit (14) and computing machine (15) place the outside of instrument box (33).Source of the gas (1) is connected the back pressure controller (7) of the left and right sides of end face round-robin multi-measuring point core holding unit (9) and the gland (26) of highly pressurised liquid jar (3) by high-pressure pressure-reducing valve (2) with pressurized pipeline (20), data acquisition unit (14) and steam piano (4), electronic balance (6), flowmeter (5), encircle press pump (8), pressure transducer (11), constant-flux pump (12) and be connected by control line (31) with computing machine (15).During experiment, getting artificial or natural laboratory sample rock core (23) is contained in the rubber of end face round-robin multi-measuring point core holding unit (9) in the cover (22), and regulate by the screw thread of left plug (17) and right plug (24) respectively and push against rock core, after installing, pressing hole (25) that rock core (23) is added ring by ring press pump (8) by ring presses, when the ring pressure reaches 2MPa, start constant-flux pump (12) by computing machine (15), make the experimental liquid of constant-flux pump (12) enter the surface of the laboratory sample rock core (23) of end face round-robin multi-measuring point core holding unit (9), and go up to set at computing machine (15) that to need the formation temperature of realistic simulation be experimental temperature, add clamper stainless steel urceolus (21) heating that hot jacket (16) is given end face round-robin multi-measuring point core holding unit (9) by electrically heated.To be heated when the experimental temperature, open the valve (10) on end face round-robin multi-measuring point core holding unit (9) top.The experimental liquid of constant-flux pump (12) is generally used clean kerosene, by the clean kerosene of constant-flux pump (12) displacement its right-to-left is flowed.Treat that experimental liquid flows steadily, after heating-up temperature reaches experimental temperature,, continue to add ring by ring press pump (8) and press along with the increase of flowing pressure, require the ring pressure pressure all the time greater than flowing pressure 2MPa, could guarantee the porous medium of liquid by rock core by rock core liquid.Then, after the pressure displayed value of each pressure transducer (11) is steady, constant-flux pump (12), ring press pump (8), pressure transducer (11), temperature sensor (32), electronic balance (6) etc. directly are transferred to signal in data acquisition unit (14) and the computing machine (15) by control line, computing machine just can calculate the original permeability parameter (Koi) of preceding each section of rock core of rock core damage by the calculation process to signal data.After this experiment finishes, need not take out laboratory sample rock core (23), again rock core be carried out the The dynamic damage experiment.Specific implementation method is as follows: top gland (26), the taking-up piston (27) of opening highly pressurised liquid jar (3), drilling fluid that injection experiments is used and well completion fluid liquid, refill upper piston (27) and top gland (26), close tapping valve (13), regulate left plug (17), guarantee that fluid passage (18) is unimpeded.Open the circulation experiment liquid of steam piano (4), the formation temperature of setting realistic simulation simultaneously is as experimental temperature, by electrically heated highly pressurised liquid jar heating jacket (28) with add hot jacket (16) highly pressurised liquid jar (3) and end face round-robin multi-measuring point core holding unit (9) are heated respectively.After waiting them to reach the experimental temperature of setting respectively, open source of the gas (1), give highly pressurised liquid jar (3) pressurization by high-pressure pressure-reducing valve (2), liquid in the highly pressurised liquid jar (3) is under the displacement of steam piano (4), in the whole pipeline circulation system, circulate, annular space in the similar drilling well of end face of laboratory sample rock core (23) forms shear rate simultaneously, and the infringement experiment is generally carried out finishing in 2.5 hours.After the infringement experiment finishes, re-use preceding method, measure and calculate the permeability (Kdi) of the undermined back of rock core each section of rock core.Size and variation by the permeability value of each section of rock core before and after the contrast infringement; just can estimate out the degree of depth and degree that each section of rock core is subjected to the entry well fluid infringement; thereby optimize good drilling fluid and the completion fluid system of protection hydrocarbon zone effect, its experimental result has important directive significance to the scientific research of petroleum prospecting, exploitation with production.

Claims (2)

1, a kind of High Temperature High Pressure rock core The dynamic damage evaluation test instrument, it is made up of instrument box, source of the gas, high-pressure pressure-reducing valve, highly pressurised liquid jar, steam piano, flowmeter, electronic balance, end face round-robin multi-measuring point core holding unit, pressure transducer, ring press pump, back pressure controller, constant-flux pump, control line, data acquisition unit and computing machine; Highly pressurised liquid jar, steam piano, ring press pump and constant-flux pump place the bottom of instrument box, end face round-robin multi-measuring point core holding unit is equipped with on the top of instrument box, and the and arranged on left and right sides of end face round-robin multi-measuring point core holding unit respectively is connected with a back pressure controller and an electronic balance; Source of the gas, high-pressure pressure-reducing valve, data acquisition unit and computing machine place the outside of instrument box, source of the gas is connected the back pressure controller of and arranged on left and right sides of end face round-robin multi-measuring point core holding unit and the gland of highly pressurised liquid jar with pressurized pipeline by high-pressure pressure-reducing valve, data acquisition unit is connected by control line with computing machine with steam piano, electronic balance, flowmeter, ring press pump, pressure transducer, constant-flux pump; It is characterized in that: end face round-robin multi-measuring point core holding unit is made up of for three layers the columniform cover that adds in hot jacket, clamper stainless steel urceolus and the rubber from outside to inside, left end is shaped on a fluid passage and the left plug that has center pit by being threaded, right-hand member has a right plug that has center pit by being threaded, the upper end of left end fluid passage is connected the highly pressurised liquid pot bottom by pressurized pipeline with flowmeter, the lower end of left end fluid passage connects steam piano by pressurized pipeline, and steam piano connects the highly pressurised liquid pot bottom by pressurized pipeline; The left end of end face round-robin multi-measuring point core holding unit connects back pressure controller and electronic balance by left plug with holes, and right-hand member connects constant-flux pump and back pressure controller and electronic balance by right plug with holes; The top of end face round-robin multi-measuring point core holding unit is shaped at least three pressure taps, and pipeline is housed in the pressure tap, and an end of pipeline passes to overlap in the rubber and communicates with the laboratory sample rock core, and the other end of pipeline is equipped with the pressure transducer that is equipped with valve; The bottom of multi-measuring point core holding unit is shaped on a ring and presses the hole, is connected with the ring press pump by pressurized pipeline.
2, High Temperature High Pressure rock core The dynamic damage evaluation test instrument according to claim 1, it is characterized in that: double-layer sleeve structure is adopted in the bottom of highly pressurised liquid jar, the outer tube that is connected with steam piano is communicated with the highly pressurised liquid pot bottom and is concordant, the inner sleeve that is connected with flowmeter places in the outer tube below the bottom of highly pressurised liquid jar, and its endpiece surpasses the bottom 3-5cm of highly pressurised liquid jar.
CNB2004100306371A 2004-04-02 2004-04-02 High temperature, high pressure core dynamic harm valuation test instrument CN1332195C (en)

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CN1332195C true CN1332195C (en) 2007-08-15

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CN102562040B (en) * 2012-02-02 2014-10-01 西南石油大学 Dynamic evaluation instrument for high-temperature and high-pressure drilling fluid loss
CN104122181B (en) * 2013-04-26 2016-09-07 中国石油天然气集团公司 Working fluid is to reservoir permeability damage appraisement device
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CN104596908B (en) * 2015-01-28 2017-02-22 太原理工大学 Test sample sealing device for high-temperature and high-pressure measurement for shear-flow of rock
CN106153515B (en) * 2015-04-20 2019-08-16 中国石油化工股份有限公司 A kind of monitoring device of the formation fluid pressure for core sample
CN106153516B (en) * 2015-04-20 2020-02-21 中国石油化工股份有限公司 Stability evaluation device for rock core sample
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US4996872A (en) * 1990-01-18 1991-03-05 Halliburton Company Modular core holder
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CN2682411Y (en) * 2004-04-02 2005-03-02 中国石油天然气集团公司 High temperature and high pressure core dynamic damage evaluation tester

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