CN106501127A - Profile control gel evaluation of dynamic method and device - Google Patents
Profile control gel evaluation of dynamic method and device Download PDFInfo
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- CN106501127A CN106501127A CN201610906734.5A CN201610906734A CN106501127A CN 106501127 A CN106501127 A CN 106501127A CN 201610906734 A CN201610906734 A CN 201610906734A CN 106501127 A CN106501127 A CN 106501127A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 88
- 238000003556 assay Methods 0.000 claims abstract description 46
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 43
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 22
- 238000001879 gelation Methods 0.000 claims abstract description 7
- 239000000499 gel Substances 0.000 claims description 70
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 44
- 239000004576 sand Substances 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 11
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 229960001866 silicon dioxide Drugs 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000000084 colloidal system Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000012153 distilled water Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- WYYQVWLEPYFFLP-UHFFFAOYSA-K chromium(3+);triacetate Chemical compound [Cr+3].CC([O-])=O.CC([O-])=O.CC([O-])=O WYYQVWLEPYFFLP-UHFFFAOYSA-K 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a kind of profile control gel evaluation of dynamic method and device, wherein evaluating apparatus include computer, peristaltic pump, pressure transducer, calorstat and some conical flasks；The computer connects the peristaltic pump, the calculating mechatronics pressure transducer by data control line；Drain pipe and feed tube are inserted with simultaneously at least one conical flask；The feed tube is connected with inlet valve, peristaltic pump, pressure transducer and calorstat in turn away from described conical flask one end；The drain pipe is connected with outlet valve and calorstat in turn away from described conical flask one end；Assay flask is provided with the calorstat, the assay flask bottom connects the feed tube, at the top of the assay flask, connects drain pipe.Profile control of the present invention gel evaluation of dynamic device, can detect evaluation profile control gel dynamic colloid formation performance indications gelation time and breakthrough pressure gradient；Easily operated, continuous 15 days are can achieve without the need for manual intervention from dynamic test.
Description
Technical field
The invention belongs to oil field development profile control, transfer drive field, more particularly, to a kind of profile control gel evaluation of dynamic
Method and device.
Background technology
Cross-linked polymer gel (referred to as " gel ") is the maximum chemical agent system of consumption in Water in Water Shutoff in Oil Field profile control agent.Hand over
Linked polymer gel is formulated by water, polymer and cross-linking agent.Be initially thick liquid after preparation, uniform temperature (40～
150 DEG C), certain time (1～7 day) be crosslinked gel afterwards.
Static gel-forming property, i.e. gel mostly are at present before conclusion of the business and during plastic in quiet to the performance evaluation of gel
Only state.But during practical application, gel state all the time in flowing in the earth formation.Gel dynamic colloid formation performance evaluation is not marked
Accurate method.
Existing method needs to carry out long back-up sand core barrel (more than 5 meters of core length, or even 30 meters) flow test, mainly deposits
In following deficiency：
(1) existing evaluation experimental device is huge, pipeline, fill out sand tube oversize (5～30 meters), needs back-up sand volume and consumption
Gel sample volume all very big, often above 4000mL.And need all to take device apart after off-test, clean
Pipeline, core barrel, intermediate receptacle etc., prepare before and after test and finish up for up to 2～4 days.
(2) flowing displacement pump is constant-flux pump.Constant-flux pump can not direct pumpable gel, can only pump and hold in the middle of distillation water-driven
Gel in device, dynamic evaluation process of the test are up to 4 to 7 days, again during need to switch intermediate receptacle, it is difficult to realize continuous
More than 12 hours from dynamic test, (4～12 hours) need Manual Switch intermediate receptacle at set intervals.
Content of the invention
In view of this, it is contemplated that proposing a kind of profile control test gels evaluation of dynamic method, existing to overcome
The defect of technology, for evaluating gel dynamic colloid formation process under formation condition.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of profile control test gels evaluation of dynamic method, comprises the following steps：
(1) prepare an assay flask so as to which one end seals, load reservoir sand into assay flask, and be mixed into in the sand of stratum
A certain amount of test gels, the other end of leakage test bottle；Assay flask one end is sequentially communicated pressure test equipment by pipeline
With the outlet of peristaltic pump, import of the other end by pipeline connection peristaltic pump；
(2) start peristaltic pump, according to the discharge capacity that time T constantly adjusts peristaltic pump, every 20 minutes, change a discharge capacity,
Pressure data of collection is simultaneously recorded, test period 7 to 15 days；Discharge capacity q during different time TtIt is calculated as follows：
Wherein：
qt:Evaluation test starts T moment wriggling pumpages after timing, mL/min；
r:Assay flask inside radius, cm；
q0:Discharge capacity when the actual profile control in scene is constructed, mL/min；
H:Formation thickness when the actual profile control in scene is constructed, cm；
φ:Formation porosity when the actual profile control in scene is constructed, without unit quantity.
T：Time after on-test timing, min；
(3) m- pressure curve when drawing, according to test data analyzer, finds out in circulating pressure data point, first more than just
Corresponding time T, as gelation time during 1.5 times of beginning circulating pressure；Find out the maximum of circulating pressure, as breakthrough pressure；
Breakthrough pressure gradient is highly again with breakthrough pressure divided by filled out reservoir sand in assay flask.
Peristaltic pump control, pressure data collection and discharge capacity q in step (2)tCalculate, artificial operation can be adopted, can also be adopted
Computerized control operation；When m- pressure curve in step (3) is drawn.
Preferably, when in step (3), initial cycle pressure is 20 and 40 minutes after on-test, circulating pressure is flat
Average；In step (3), 15 days whole pressure datas are both less than 1.5 times of initial cycle pressure, then it is assumed that tested to be measured solidifying
Glue dynamic is unable to plastic.
Preferably, in step (1), it is ensured that the assay flask equipped with reservoir sand and test gels is vertically set up, and outside which
Portion's temperature is adjustable；Ensure in step (1) that reservoir sand position is fixed.By external temperature to the value similar to formation temperature,
Assay flask is placed under this kind of environment, the test of stratum condition can be simulated.
Preferably, the mode that the test gels in step (1) are mixed into reservoir sand is the assay flask that will be equipped with reservoir sand
Two ends seal, and using peristaltic pump, test gels are pumped in assay flask from the bottom of assay flask by pipeline so as to reservoir sand
Mixing.Specifically, test gels are previously charged in a container, the assay flask other end connects container by the first pipeline,
Wriggling pump inlet connects container by the second pipeline, and the second pipeline is stretched in test gels；First pipeline and the second pipeline it
Between be provided with the 3rd pipeline, and the first pipeline and the second pipeline are connected with the 3rd pipeline, the first pipeline, the second pipeline and the 3rd pipe
Valve is equipped with line, and the 3rd pipeline is located between the valve and peristaltic pump of the first pipeline, can be in the case where peristaltic pump be opened
(wriggling 5～10mL/min of pumpage), by adjust the opening and closing of each valve realize test gels pump into reservoir sand mixed with
And in pipeline air discharge (air efflux time 30～60 minutes)；The container that this setting will be equipped with test gels is changed into and is equipped with
The container of distilled water, the positive in conjunction with peristaltic pump start and anti-phase startup, you can realize whole evaluation methodology institute use device
Cleaning.Positive starts the achievable distilled water of peristaltic pump and pumps into, and device is cleaned, now 50～100mL/ of wriggling pumpage
Min, scavenging period 30～40 minutes；Anti-phase startup peristaltic pump dallies 10～15 minutes, distilled water that can be in Head-space equipment.
Preferably, there is pre- emptying operation between step (1) and step (2), by the air row of each pipeline in step (1)
Go out；Equipment matting is provided with after step (3), after equipment cleaning, restarts to determine next test gels.
Evaluate ultimate principle：
Gel dynamic colloid formation process under the evaluable formation condition of the present invention.Gel is driven to be filled with reservoir sand with peristaltic pump
In assay flask, iterative cycles flowing, evaluates its gel-forming property by circulating pressure change.Circulate pressure to significantly increase
More than 50% time be gelation time, largest loop pressure be gel breakthrough pressure.
In practice, behind gel injection stratum, different time flow velocity is different, and rate started is high, is then gradually lowered.The present invention
Computerized control the discharge capacity of peristaltic pump different time, record the pressure of different time.
Another object of the present invention is to proposing a kind of for profile control as above test gels evaluation of dynamic
The device of method, to solve existing gel dynamic colloid formation benchmark test complex operation, it is impossible to the continuous problem from dynamic test.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of for the profile control as above device of test gels evaluation of dynamic method, including computer, compacted
Dynamic pump, pressure transducer, calorstat and some conical flasks；
The computer is built with data collecting card, data processing software and control system；The computer passes through data
Control line connects the peristaltic pump, the calculating mechatronics pressure transducer；
Drain pipe and feed tube are inserted with simultaneously at least one conical flask；The feed tube is burnt away from the triangle
Bottle one end is connected with inlet valve, peristaltic pump, pressure transducer and calorstat in turn；The drain pipe is away from the conical flask one
End is connected with outlet valve and calorstat in turn；Tap line is provided between the drain pipe and feed tube, the tap line position
Between the inlet valve and peristaltic pump；The tap line is provided with short circuit valve；
Speed governing is carried out to peristaltic pump using computer, speed adjustable range is 0～100mL/min, wriggling pump discharge pressure is big
In 0.3MPa.Pressure transducer maximum range is 1.0MPa, and precision is 0.006MPa.It is for simulated formation temperature to arrange calorstat
Degree, test gels need not be heated before calorstat is entered by feed tube.
Assay flask is provided with the calorstat, the assay flask bottom connects the feed tube, connects at the top of the assay flask
Pass-out liquid pipe.
Further, the assay flask is perpendicular to the calorstat bottom, but leaves spacing with the calorstat bottom；Institute
Stating assay flask includes upper end cover, bottle and bottom end cover；The upper end cover and bottom end cover are threadedly coupled the bottle, and both of which
Sealed using silicagel pad between the bottle；The drain pipe and feed liquor is respectively communicated with the outside of the upper end cover and bottom end cover
Pipe, is equipped with screen cloth on the inside of the upper end cover and bottom end cover；Two screen cloth is respectively positioned in the bottle, and edge is and bottle
Wall is close to；Reservoir sand is filled with bottle between two screen cloth.
Further, in the threaded connection of the upper end cover, bottom end cover and bottle, it is on the upper end cover and bottom end cover
Female thread, is external screw thread on the bottle；The drain pipe pipeline section being respectively communicated with the outside of the upper end cover and bottom end cover and feed liquor
Pipe pipeline section is stainless steel；Weld with the upper end cover and bottom end cover respectively in the drain pipe pipeline section and feed tube pipeline section one end
Connect, the drain pipe pipeline section and the feed tube pipeline section other end penetrate the calorstat and be respectively communicated with the conical flask and pressure
Sensor.The internal diameter of drain pipe pipeline section and feed tube pipeline section is between 3-6mm.Preferably, drain pipe pipeline section and feed tube pipe
Section penetrates the center of upper end cover and the center of bottom end cover respectively.
Further, the drain pipe and feed tube adopt stainless steel tube or resistance to away from the pipeline section of described calorstat one end
Warm silica gel tube；The bottle is a stainless pipe；The screen cloth material is rustless steel, and the sieve number is 50～400.When
When test temperature is below 95 DEG C, drain pipe and feed tube adopt heatproof silica gel tube away from the pipeline section of described calorstat one end；When
When test temperature is more than 95 DEG C, drain pipe and feed tube adopt stainless steel tube away from the pipeline section of described calorstat one end；Cross perseverance
The external diameter 6mm stainless steel tubes of a section of incubator wall；It is to block reservoir sand using the purpose of setting screen cloth, it is ensured which will not move；
Bottle is 25.5 ± 5mm of internal diameter, the stainless pipe of high 25 ± 5mm.
Further, the feed tube insertion distance of described conical flask one end end face away from the conical flask bottom is little
Distance of described conical flask one end end face away from the conical flask bottom is inserted in the drain pipe；The feed tube, go out liquid
Pipe, inlet valve, outlet valve, short circuit valve and pressure more than the 1.0MPa in each pipeline top connection position, more than 150 DEG C of heatproof；Described
Inlet valve, outlet valve, short circuit valve and each pipeline top connection portion are stainless steel；30～200 DEG C of the calorstat temperature can
Adjust.Calorstat temperature-controlled precision is ± 2 DEG C, and internal height is more than 300mm；The external diameter of feed tube and drain pipe is 6mm；Import
Valve, outlet valve, short circuit valve and each pipeline top connection portion are stainless steel, and interior latus rectum is in more than 3mm.Some conical flasks
Volume be 500mL, quantity is preferably 3, wherein 1 be served only for depositing temporarily test gels, in addition 2 shelf tests terminate
The distilled water of cleaning equipment afterwards.
Relative to prior art, a kind of profile control test gels evaluation of dynamic method of the present invention has following
Advantage：
A kind of profile control of the present invention test gels evaluation of dynamic method, drives gel being filled with peristaltic pump
In the assay flask of reservoir sand, iterative cycles flowing, evaluates its gel-forming property by circulating pressure change；Circulate pressure
Significantly increase more than 50% time be gelation time, largest loop pressure be gel breakthrough pressure.Of the present invention one
Profile control test gels evaluation of dynamic method is planted, reasonable in design, simple to operate, can be used for gel under evaluation formation condition and move
State plastic process.
Of the present invention a kind of for the profile control as above device of test gels evaluation of dynamic method, energy
Profile control, transfer drive gel dynamic colloid formation performance indications gelation time and breakthrough pressure gradient are evaluated in detection；Easily operated, can
Realize continuous 15 days without the need for manual intervention from dynamic test, and conventional method needs artificial participation；Before and after test, time is short, no
Foot 2 hours, and conventional method generally needs 1～2 day.
Description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the simple structure schematic diagram of the profile control gel evaluation of dynamic device described in the embodiment of the present invention 1.
Reference：
1- computers；2- peristaltic pumps；3- pressure transducers；4- calorstats；5- conical flasks；6- drain pipes；7- feed tubes；
8- inlet valves；9- outlet valves；10- short circuit valves；11- assay flasks；111- upper end covers；112- bottles；113- bottom end covers；114- is sieved
Net；12- reservoir sands；13- data control lines；14- test gels.
Specific embodiment
Unless otherwise indicated, term used herein is respectively provided with the implication that those skilled in the art routinely understand, in order to
The present invention is readily appreciated, some terms used herein have been carried out following definitions.
All of Digital ID, such as pH, temperature, time, concentration, including scope, are all approximations.It is to be understood that, although
All add before all of Digital ID clearly not being described always term " about ".While it will also be understood that, although always not clear and definite
Narration, reagent described herein is only example, and its equivalent is known in the art.
The present invention is described in detail with reference to embodiment and accompanying drawing.
Embodiment 1
As shown in figure 1, a kind of profile control gel evaluation of dynamic device, including computer 1, peristaltic pump 2, pressure sensing
Device 3, calorstat 4 and some conical flasks 5；
The computer 1 is built with data collecting card, data processing software and control system；The computer 1 is by number
Connect the peristaltic pump 2 according to control line 13, the computer 1 electrically connects pressure transducer 3；
Drain pipe 6 and feed tube 7 are inserted with simultaneously at least one conical flask 5；The feed tube 7 is away from described three
Flask 5 one end in angle is connected with inlet valve 8, peristaltic pump 2, pressure transducer 3 and calorstat 4 in turn；The drain pipe 6 is away from described
5 one end of conical flask is connected with outlet valve 9 and calorstat 4 in turn；Tap line is provided between the drain pipe 6 and feed tube 7,
The tap line is located between the inlet valve 8 and peristaltic pump 2；The tap line is provided with short circuit valve 10；
Assay flask 11 is provided with the calorstat 4, and 11 bottom of the assay flask connects the feed tube 7, the assay flask
Drain pipe 6 is connected at the top of 11.
The assay flask 11 is perpendicular to 4 bottom of the calorstat, but leaves spacing with 4 bottom of the calorstat；The examination
Testing bottle 11 includes upper end cover 111, bottle 112 and bottom end cover 113；The upper end cover 111 and bottom end cover 113 are threadedly coupled described
Sealed using silicagel pad between bottle 112, and both of which and the bottle 112；On the outside of the upper end cover 111 and bottom end cover 113
The drain pipe 6 and feed tube 7 is respectively communicated with, on the inside of the upper end cover 111 and bottom end cover 113, screen cloth 114 is equipped with；Described two
Screen cloth 114 is respectively positioned in the bottle 112, and edge is close to 112 wall of bottle；Bottle 112 between two screen cloth 114
Interior filled with reservoir sand 12, the reservoir sand particle diameter is 0.5～2mm；The peristaltic pump speed adjustable range is 0～100mL/
min.
In the threaded connection of the upper end cover 111, bottom end cover 113 and bottle 112, the upper end cover 111 and bottom end cover 113
On be female thread, on the bottle 112 be external screw thread；Be respectively communicated with the outside of the upper end cover 111 and bottom end cover 113 goes out
6 pipeline section of liquid pipe and 7 pipeline section of feed tube are stainless steel, and the internal diameter of 7 pipeline section of 6 pipeline section of drain pipe and feed tube is
3mm；6 pipeline section of the drain pipe and 7 pipeline section one end of feed tube are welded with the upper end cover 111 and bottom end cover 113 respectively, described go out
6 pipeline section of liquid pipe and the 7 pipeline section other end of feed tube penetrate the calorstat 4 and are respectively communicated with the conical flask 5 and pressure sensing
Device 3.
The drain pipe 6 and feed tube 7 adopt heatproof silica gel tube away from the pipeline section of 4 one end of the calorstat；The bottle
Body 112 is a stainless pipe, and the round tube inside diameter is 25.4mm, height 30mm；114 material of the screen cloth be rustless steel, institute
Sieve number is stated for 100.
The feed tube 7 inserts distance of the 5 one end end face of the conical flask away from 5 bottom of the conical flask less than described
Drain pipe 6 inserts distance of the 5 one end end face of the conical flask away from 5 bottom of the conical flask；The feed tube 7 and drain pipe
6 external diameter is 6mm；The feed tube 7, drain pipe 6, inlet valve 8, outlet valve 9, short circuit valve 10 and each pipeline top connection position
Pressure more than 1.0MPa, more than 150 DEG C of heatproof；The inlet valve 8, outlet valve 9, short circuit valve 10 and each pipeline top connection portion are equal
For stainless steel, and interior latus rectum is 3mm.
The quantity of some conical flasks 5 is 3；The volume of 3 conical flasks 5 is 500mL.
30～200 DEG C of 4 temperature of the calorstat is adjustable, and temperature-controlled precision is ± 2 DEG C, and internal height is more than 350mm.
Adopt above-mentioned evaluating apparatus to containing 0.4% polyacrylamide (molecular weight is 20,000,000, degree of hydrolysis 18%), 0.4%
The test gels 14 that chromium acetate is formed are evaluated, and evaluation methodology is：Comprise the following steps：
(1) 11 one end of assay flask is assembled, reservoir sand 12 is inserted, screen cloth 114, silica gel sealing pad is put into and is screwed the other end；
Assay flask 11 is put into calorstat 4, keeps assay flask 11 vertical in calorstat 4；Connection feed tube 7, drain pipe 6, peristaltic pump
2nd, pressure transducer 3, computer 1, inlet valve 8, outlet valve 9 and short circuit valve 10；
(2) prepare 14 200mL of test gels, be put in a conical flask 5, will be equal to feed tube 7 and 6 one end of drain pipe
Insertion conical flask 5, makes 7 port of feed tube stretch in test gels 14, and 6 port of drain pipe is left with 14 upper surface of test gels
Spacing；
(3) inlet valve 8 and outlet valve 9 is opened, closes short circuit valve 10, started peristaltic pump 2, pumped into 7mL/min discharge capacities and treated
Survey gel 14, drain pipe 6 stretch into 5 one end of conical flask first can air-out, be then discharged out test gels 14；Continue 30 minutes
Afterwards, inlet valve 8 and outlet valve 9 is closed, opens short circuit valve 10, opened calorstat 4 and be set to test temperature.
(4) start computer 1, data processing software starts T between timing, wriggling constantly adjusted according to time T control system
2 discharge capacity of pump, every 20 minutes, changes a discharge capacity, and data collecting card gathers a pressure data and preserves, and test period 7 is arrived
15 days；Discharge capacity q during different time TtIt is calculated as follows：
Wherein：
qt:Evaluation test starts 2 discharge capacity of T moment peristaltic pumps after timing, mL/min；
r:Assay flask (11) inside radius, cm；
q0:Discharge capacity when the actual profile control in scene is constructed, mL/min；
H:Formation thickness when the actual profile control in scene is constructed, cm；
φ:Formation porosity when the actual profile control in scene is constructed, without unit quantity.
T：Time after on-test timing, min；
(5) m- pressure curve when drawing, according to test data analyzer, finds out in circulating pressure data point, first more than just
Corresponding time T, as gelation time during 1.5 times of beginning circulating pressure；Find out the maximum of circulating pressure, as breakthrough pressure；
Breakthrough pressure gradient is again with breakthrough pressure divided by 12 height of filled out reservoir sand in assay flask 11；
(6), after off-test, a loading distilled water in two other conical flask 5 opens inlet valve 8 and outlet valve
9, half-open short circuit valve 10 starts peristaltic pump 2, pumps into distilled water washing test device 30 minutes with 60mL/min discharge capacities；Then remove
Fall conical flask 5,7 port of feed tube and 6 port of drain pipe be exposed in air, anti-phase startup peristaltic pump 2 dallies 12 minutes,
Distilled water in Head-space equipment.
Meansigma methodss of the initial cycle pressure for circulating pressure when 20 and 40 minutes after on-test in step (5).
In step (4), each parameter value situation of formula is：Discharge capacity q when the actual profile control in scene is constructed0For 4m3/h
(66666.7mL/min) when, the actual profile control in scene is constructed, formation thickness is 1000cm, formation pore when live actual profile control is constructed
Degree 30%.On-test 20min discharge capacity is calculated for 1.43mL/min, each time point discharge capacity is by formula in step (4) afterwards
Calculate.
Through measuring and calculating, initial cycle pressure is 0.06MPa, and when 142.0 hours, circulating pressure is more than first and initially follows
1.5 times of ring compression 0.06MPa, i.e. 0.11MPa then measured dynamic gelling time for 142.50 hours；Largest loop pressure
0.224MPa, assay flask sand-pack height 0.028m, then breakthrough pressure gradient=0.224/0.028=8MPa/m.Before evaluation test
Time is equal less than 2 hours afterwards, and test pilot process is performed fully automatic.
Embodiment 2
Device and evaluation methodology in the present embodiment and embodiment 1 is essentially identical, and difference is：The speed governing of peristaltic pump
Scope is 0～50mL/min；Reservoir sand grain diameter is 0.2～1.5mm；Sieve number is 200；The test gels 14 of evaluation are
0.5% polyacrylamide (molecular weight be 20,000,000, degree of hydrolysis 18%), 0.5% chromium acetate formed gel；Test temperature is
105℃；
In step (3), test gels 14 are pumped into 10mL/min discharge capacities；After continuing 45 minutes, 8 He of inlet valve is closed
Outlet valve 9, opens short circuit valve 10；
In step (6), distilled water washing test device is pumped into 35 minutes with 80mL/min discharge capacities；Anti-phase startup wriggles
Pump 2 dallies 10 minutes, the distilled water in Head-space equipment.
In step (4), each parameter value situation of formula is：Discharge capacity q when the actual profile control in scene is constructed0For 3m3/h
(50000.0mL/min) when, the actual profile control in scene is constructed, formation thickness is 1000cm, formation pore when live actual profile control is constructed
Degree 22%.On-test 20min discharge capacity is calculated for 1.06mL/min, each time point discharge capacity is by formula in step (4) afterwards
Calculate.
Through measuring and calculating, initial cycle pressure is 0.04MPa, and when 97.3 hours, circulating pressure is more than initial cycle first
1.5 times of pressure 0.04MPa, i.e. 0.07MPa then measured dynamic gelling time for 97.3 hours；Largest loop pressure
0.171MPa, assay flask sand-pack height 0.028m, then breakthrough pressure gradient=0.171/0.028=6.1MPa/m.Evaluation test
Time is equal less than 2 hours in front and back, and test pilot process is performed fully automatic.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limit the present invention, all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements that is made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of profile control test gels evaluation of dynamic method, it is characterised in that：Comprise the following steps：
(1) prepare an assay flask (11) so as to which one end seals, load reservoir sand (12) into assay flask (11), and to stratum
A certain amount of test gels (14), the other end of leakage test bottle (11) are mixed in husky (12)；Assay flask (11) one end is passed through
Pipeline is sequentially communicated the outlet of pressure test equipment and peristaltic pump (2), and the other end connects the import of peristaltic pump (2) by pipeline；
(2) start peristaltic pump (2), according to the discharge capacity that time T constantly adjusts peristaltic pump (2), every 20 minutes, change and once arrange
Amount, pressure data of collection are simultaneously recorded, test period 7 to 15 days；Discharge capacity q during different time TtIt is calculated as follows：
Wherein：
qt:Evaluation test starts T moment peristaltic pump (2) discharge capacities after timing, mL/min；
r:Assay flask (11) inside radius, cm；
q0:Discharge capacity when the actual profile control in scene is constructed, mL/min；
H:Formation thickness when the actual profile control in scene is constructed, cm；
φ:Formation porosity when the actual profile control in scene is constructed, without unit quantity.
T：Time after on-test timing, min；
(3) m- pressure curve when drawing, according to test data analyzer, finds out in circulating pressure data point, is more than first and initially follows
Corresponding time T, as gelation time during 1.5 times of ring compression；Find out the maximum of circulating pressure, as breakthrough pressure；Use again
Breakthrough pressure is breakthrough pressure gradient divided by filled out reservoir sand (12) height in assay flask (11).
2. a kind of profile control according to claim 1 test gels evaluation of dynamic method, it is characterised in that：The step
Suddenly in (3) initial cycle pressure be on-test after 20 and 40 minutes when circulating pressure meansigma methodss；15 days in step (3)
All pressure data is both less than 1.5 times of initial cycle pressure, then it is assumed that tested test gels (14) dynamic is unable to plastic.
3. a kind of profile control according to claim 1 test gels evaluation of dynamic method, it is characterised in that：The step
Suddenly in (1), it is ensured that the assay flask (11) equipped with reservoir sand (12) and test gels (14) is vertically set up, and its external temperature can
Adjust；Ensure in step (1) that reservoir sand (12) position is fixed.
4. a kind of profile control according to claim 1 test gels evaluation of dynamic method, it is characterised in that：The step
Suddenly the test gels (14) in (1) be mixed into reservoir sand (12) mode be will be equipped with reservoir sand (12) assay flask (11) two ends close
Envelope, using peristaltic pump (2), test gels (14) is pumped in assay flask (11) from the bottom of assay flask (11) by pipeline, is made
Which is mixed with reservoir sand.
5. a kind of profile control according to claim 1 test gels evaluation of dynamic method, it is characterised in that：The step
Suddenly there is pre- emptying operation between (1) and step (2), the air of each pipeline in step (1) is discharged；It is provided with after step (3)
Equipment matting, after equipment cleaning, restarts to determine next test gels.
6. dress of a kind of profile control for as described in claim 1 to 5 any one with test gels evaluation of dynamic method
Put, it is characterised in that：Including computer (1), peristaltic pump (2), pressure transducer (3), calorstat (4) and some conical flasks
(5)；
Computer (1) is built with data collecting card, data processing software and control system；Described computer (1) is by number
Connect peristaltic pump (2) according to control line (13), described computer (1) electrical connection pressure transducer (3)；
Drain pipe (6) and feed tube (7) are inserted with simultaneously at least one conical flask (5)；Feed tube (7) are away from institute
State conical flask (5) one end and be connected with inlet valve (8), peristaltic pump (2), pressure transducer (3) and calorstat (4) in turn；Described
Drain pipe (6) is connected with outlet valve (9) and calorstat (4) in turn away from the conical flask (5) one end；Drain pipe (6)
Tap line is provided with and feed tube (7) between, the tap line is located between the inlet valve (8) and peristaltic pump (2)；Described
Tap line is provided with short circuit valve (10)；
Assay flask (11) is provided with calorstat (4), and assay flask (11) bottom connects feed tube (7), the examination
Test connection drain pipe (6) at the top of bottle (11).
7. according to claim 6 a kind of for the profile control device of test gels evaluation of dynamic method, its feature
It is：Assay flask (11) are perpendicular to the calorstat (4) bottom, but leave spacing with the calorstat (4) bottom；Described
Assay flask (11) includes upper end cover (111), bottle (112) and bottom end cover (113)；Upper end cover (111) and bottom end cover (113)
It is threadedly coupled between the bottle (112), and both of which and the bottle (112) and is sealed using silicagel pad；The upper end cover
(111) and the drain pipe (6) and feed tube (7), upper end cover (111) and lower end are respectively communicated with the outside of bottom end cover (113)
Screen cloth (114) is equipped with the inside of lid (113)；Two screen clothes (114) are respectively positioned in the bottle (112), and edge with bottle
Body (112) wall is close to；Reservoir sand (12) is filled with bottle (112) between two screen clothes (114).
8. according to claim 6 a kind of for the profile control device of test gels evaluation of dynamic method, its feature
It is：In the threaded connection of upper end cover (111), bottom end cover (113) and bottle (112), upper end cover (111) and lower end
Female thread is on lid (113), it is external screw thread that described bottle (112) are upper；On the outside of upper end cover (111) and bottom end cover (113)
Drain pipe (6) pipeline section and feed tube (7) pipeline section being respectively communicated with is stainless steel；Drain pipe (6) pipeline section and enter
Liquid pipe (7) pipeline section one end is welded with the upper end cover (111) and bottom end cover (113) respectively, drain pipe (6) pipeline section and feed liquor
Pipe (7) pipeline section other end penetrates the calorstat (4) and is respectively communicated with the conical flask (5) and pressure transducer (3).
9. according to claim 6 a kind of for the profile control device of test gels evaluation of dynamic method, its feature
It is：Drain pipe (6) and feed tube (7) adopt stainless steel tube or heatproof away from the pipeline section of the calorstat (4) one end
Silica gel tube；Described bottle (112) are a stainless pipe；Screen cloth (114) material is rustless steel, and the sieve number is 50
～400.
10. according to claim 6 a kind of for the profile control device of test gels evaluation of dynamic method, its feature
It is：Described feed tube (7) insertion distance of conical flask (5) one end end face away from the conical flask (5) bottom is less than
Described drain pipe (6) insert distance of conical flask (5) one end end face away from the conical flask (5) bottom；The feed liquor
Pipe (7), drain pipe (6), inlet valve (8), outlet valve (9), short circuit valve (10) and the pressure 1.0MPa in each pipeline top connection position
More than, more than 150 DEG C of heatproof；Inlet valve (8), outlet valve (9), short circuit valve (10) and each pipeline top connection portion are stainless
Steel matter；30～200 DEG C of calorstat (4) temperature is adjustable.
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| CN108333224B (en) * | 2018-01-31 | 2020-08-18 | 中国海洋石油集团有限公司 | Device and method for measuring gel forming time of weak gel system in rock core |
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