CN204804827U - Measurement system of proppant embedment degree of depth - Google Patents
Measurement system of proppant embedment degree of depth Download PDFInfo
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- CN204804827U CN204804827U CN201520382469.6U CN201520382469U CN204804827U CN 204804827 U CN204804827 U CN 204804827U CN 201520382469 U CN201520382469 U CN 201520382469U CN 204804827 U CN204804827 U CN 204804827U
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Abstract
The utility model provides a measurement system of proppant embedment degree of depth, include: compression test machine, embedding mould, treater device, data acquisition device and high power digital display micro mirror, place the embedding mould on the platform of compression test machine, the embedding mould includes know how things stand and feel confident a non -operculate cavity and a piston, is provided with two blocks of core boards in the cavity, spreads between the core board and has put the proppant, and the piston sets up on the core board when the test, the data acquisition device is connected between compression test machine and treater device for the measurement exert pressure the in -process the parameter and send it to the treater device, treater device connection pressure testing machine for the operation of control compression test machine, high power digital display micro mirror and treater device link to each other, with a core board embedding face image of shooing send to the treater device, the degree of depth of output proppant embedment core board. The utility model discloses can be accurate measure the proppant embedment degree of depth, calculate simply, convenient operation is to the high -usage of coring board.
Description
Technical field
The utility model relates to petroleum exploration field, particularly a kind of system for measuring the proppant embedment rock degree of depth of press-in rock stratum in oilfield exploitation procedure.
Background technology
China's hyposmosis, Ultra low permeability reservoir are widely distributed, and most of Low permeable oil and gas reservoirs carries out reservoir stimulation transformation mainly through hydraulic fracturing technology and obtains industrial oil gas.After pressing crack construction terminates, under the effect of formation closure stress, there is the phenomenon of proppant embedment formation rock.Proppant embedment causes crack seam reductions little, and flow conductivity reduces, and after pressure, effect of increasing production is poor.This phenomenon is particularly evident in high clossing pressure, broken ground.The degree of depth of assay proppant embedment rock, for Optimum Fracturing design, improves fracturing reform effect tool and is of great significance.
" broken ground proppant embedment and fracture condudtiviy based on the design of HEC, borate and water-based fracturing " (SPE38590) that abroad deliver according to LewisL.Lacy adopts uniform grading beach sand agglutination simulating formation rock, testing with certain particle diameter steel ball simulation proppant, there is following shortcoming in the method:
1, with steel ball simulation proppant with cementing beach sand simulated formation rock, and the practical function in reality between proppant and formation rock there are differences, and can not reflect truth.
2, can not carry out embedding experiment for different reservoir type of rock, the scope of application is poor.
3, only describe proppant embedment phenomenon, do not calculate concrete insert depth, actual directive significance is lacked to FRACTURING DESIGN.
Proppant embedment measured by current domestic employing flow conductivity experimental facilities, first uses steel plate experiment to obtain the supporting crack width of any time, then utilizes rock core plate to test the supporting crack width obtaining any time, obtain insert depth finally by difference.There is following shortcoming in this patent " measurement mechanism of embedding depth of proppant and measuring method " (CN100594289C):
1, first use steel plate to carry out water conservancy diversion experiment, steel plate can deform, and there is the embedding phenomenon of proppant, so there is error.
2, due to the impact of human factor, Examination on experimental operation, step, the impact that the factors such as proppant fragmentation and compaction bring to two groups of experiments can not be completely the same.Use steel plate and core plate to carry out twice experiment, experimentally result carries out difference, and the result of calculation drawn is accurate not.
3, do not determine that proppant embedment completes the required time.So there is no provide the clear and definite stress loading time.
Utility model content
The utility model provides a kind of measuring system of embedding depth of proppant, for solving the problems such as embedding depth of proppant in prior art measures inaccuracy, and operating process is complicated.
In order to solve the problem, the technical solution of the utility model is that the measuring system of embedding depth of proppant comprises: pressure testing machine, embedding mould, processor device, data acquisition unit and high power digital display micro mirror;
The platform of described pressure testing machine being placed described embedding mould, exerting pressure for giving described embedding mould;
Described embedding mould comprises cavity and the piston that has end uncovered, is provided with two blocks of core plates in described cavity, and laid between described core plate have proppant, and described piston is arranged on described core plate in time testing;
Described data acquisition unit is connected between described pressure testing machine and described processor device, sends it to described processor device for the parameter measured in course of exerting pressure;
Described processor device connects described pressure testing machine, runs for controlling described pressure testing machine;
Described high power digital display micro mirror is connected with processor device, after pressure testing machine quits work, take out two core plate, core plate embedded surface is taken pictures, and the core plate embedded surface image of shooting is sent to described processor device, processor device exports the degree of depth of proppant embedment core plate.The further aspect of the utility model one embodiment, described data acquisition unit comprises pressure sensor and displacement transducer, is respectively used to the range information between the information of exerting pressure of gaging pressure testing machine and core plate.
The further aspect of the utility model one embodiment, described measuring system also comprises data acquisition board, be connected between described processor device and described pressure sensor and institute's displacement sensors, for gathering the pressure information in course of exerting pressure and the range information between core plate, and send it to described processor device.
The further aspect of the utility model one embodiment, described proppant is the ceramsite propping agent of 425 ~ 850 μm.
The further aspect of the utility model one embodiment, the concentration of described proppant is 5kg/m
2.
The further aspect of the utility model one embodiment, the thickness of described core plate is 10 ± 1mm.
The further aspect of the utility model one embodiment, the bottom thickness of described embedding mould is 9.53mm, sidewall thickness is 12.7mm.
The further aspect of the utility model one embodiment, described embedding mould is a cylindrical chamber receptacle having end uncovered, and the cavity cross section of described embedding mould and described piston diameter are 75mm or 100mm or 120mm.
The further aspect of the utility model one embodiment, described piston height is 88.9mm, and the height of described chamber receptacle is 76.2mm.
The measuring system of the embedding depth of proppant that the utility model provides can measure embedding depth of proppant accurately, calculate simple, easy to operate, high to the utilization rate of institute's coring plate, the situation on proppant embedment stratum in fracturing fracture can be reacted really, and proppant embedment core plate depth calculation Consideration is comprehensive, calculate accurately, for fracturing technique measure decision-making and Optimum Fracturing design, there is certain directive significance.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing needed embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the measuring system of the embedding depth of proppant of the utility model one embodiment;
Fig. 2 is the structural representation of the measuring system of the embedding depth of proppant of another embodiment of the utility model;
Fig. 3 is the embedding mould structure schematic diagram of the utility model one embodiment;
Fig. 4 is the embedding mould longitudinal profile schematic diagram of the utility model one embodiment;
Fig. 5 is the geometric representation that the embedding depth of proppant of the utility model one embodiment calculates;
The embedding depth of proppant measuring method flow chart of Fig. 6 the utility model one embodiment.
Detailed description of the invention
In order to make technical characterstic of the present utility model and effect more obvious; below in conjunction with accompanying drawing, the technical solution of the utility model is described further; the utility model also can have other different instantiations to be illustrated or to implement, and the equivalents that any those skilled in the art do in right all belongs to protection category of the present utility model.
As shown in Figure 1, Fig. 1 is the measuring system structural representation of the embedding depth of proppant of the utility model one embodiment, and the measuring system of embedding depth of proppant comprises pressure testing machine 4, embeds mould 3, processor device 6, data acquisition unit 1 and high power digital display micro mirror (not shown).Described embedding mould 3 being placed by the platform of described pressure testing machine 4, exerting pressure for giving described embedding mould; Described embedding mould 3 is a chamber receptacle having end uncovered, is provided with two blocks of core plates in described chamber receptacle, and laid between described core plate have proppant; Described data acquisition unit is connected between described pressure testing machine and described processor device, sends it to described processor device for the parameter measured in course of exerting pressure; Described processor device 6 connects described pressure testing machine 1, for the operation of controlled pressure testing machine.Described high power digital display micro mirror is connected with processor device, when pressure testing machine quits work, take out two blocks of core plates, core plate embedded surface is taken pictures, and the embedded surface image of shooting is sent to described processor device, processor device exports the degree of depth of proppant embedment core plate.
Specifically, embedding mould and piston are made up of the manganese steel material of quenching, and has anti-pressure ability strong, the characteristic of good seal performance.High power digital display micro mirror is taken pictures to core plate proppant embedment face, obtain the embedding picture with scale, get point at random (namely, get proppant grain at random, one or two proppant grain of the regional choice of such as every cubic centimetre, also can get flexibly a little according to actual conditions), thus obtain embedding circular radius r
n.Further, described processor device shows the embedded surface image of described proppant, obtains embedding circular radius according to embedded surface image, and according to the embedding circular radius of described proppant and the radius of proppant, the agent that is supported embeds the degree of depth of core plate.Wherein, the radius of proppant, before testing, can obtain by screen analysis experimental analysis, and acquisition and the proppant embedment core plate depth calculation process of the radius of proppant will be described in detail in subsequent embodiment, repeat no more herein.It should be noted that, when specifically implementing, the picture of high power number microscope photographing also can not transfer to processor device, and the mode by flash disk copy copies to processor device, or the degree of depth of the agent embedding core plate that is supported by the artificial mode calculated.
Concrete, as shown in Figure 2, data acquisition unit comprises pressure sensor 11 and displacement transducer 12, be respectively used to gather the range information between the information of exerting pressure of pressure testing machine and core plate, pressure sensor and displacement transducer can be directly connected on processor device, according to displacement sensor value, processor device tentatively judges whether proppant produces embedding phenomenon, the force value that processor device records according to pressure sensor, control signal is sent to pressure testing machine, makes pressure testing machine better can simulate pressure environment residing for proppant.As shown in Figure 2, in the utility model one embodiment, test macro also comprises data acquisition board 5, connect described processor device 6, Bonding pressure sensor and displacement transducer in data acquisition board, for gathering the range information between the information of exerting pressure of the pressure testing machine in course of exerting pressure and core plate, and send it to described processor device.
Processor device described in the utility model can be the device such as computer, specialized control equipment.The utility model does not do concrete restriction to processor device.
In the utility model one embodiment, proppant is the ceramsite propping agent of 425 ~ 850 μm, and the concentration of proppant is 5kg/m
2, the thickness of core plate is 10 ± 1mm, and the bottom thickness embedding mould is 9.53mm, sidewall thickness is 12.7mm.In other embodiments of the utility model, can also select the proppant of other materials, size, concentration, the thickness of core plate also visual actual conditions is chosen.
In the utility model one embodiment, refer to Fig. 3 again, embedding mould comprises a piston 7, the half-headed cavity 8 of bottom, in this embodiment, cavity is the hydrostatic column of a hollow, and piston is arranged at the top of cavity, for solid cylinder body structure, wherein, the cross-sectional diameter of piston and the cavity cross section diameter of cylindrical cavity are d, and other sizes of piston and cavity as shown in the figure.Detailed, as shown in Figure 4, be two blocks of core plates 10, proppant 11 is housed between core plate between piston 7 and circular cylindrical cavity 8, proppant 11 is laid between two blocks of core plates uniformly.
In the present embodiment, in order to avoid doing multiprocessing to core post, as polishing, cutting etc., three types according to the core post of reservoir taking-up (is respectively diameter 75mm, 100mm, the cylinder of 120mm), directly core plate being designed to diameter is 75mm, 100mm, the cylinder of 120mm, embed mould and be also divided into three kinds of specifications according to the shape of taking out core post, specification one: piston cross-section diameter 75mm, the high 88.9mm of piston, the cavity cross section diameter 75mm of cylindrical cavity, embed the wall thickness 12.7mm of mould, the high 76.2mm of cavity, embed mould bottom thickness 9.53mm.Specification two: piston cross-section diameter 100mm, the high 88.9mm of piston, the diameter of section 100mm of cylindrical cavity, embed the wall thickness 12.7mm of mould, the high 76.2mm of cavity, embeds mould bottom thickness 9.53mm.Specification three: piston cross-section diameter 120mm, the high 88.9mm of cavity, the cavity cross section diameter 120mm of cylindrical cavity, embed the wall thickness 12.7mm of mould, the high 76.2mm of cavity, embeds mould bottom thickness 9.53mm.The diameter of the core post that the embedding mould that the utility model provides can be got with reservoir matches, and embedding mould cavity and piston are fitted tightly, and reduces measure error.In other embodiment of the utility model, embed mould and also can be designed to other size according to actual conditions, the utility model does not limit the concrete size embedding mould.
As shown in Figure 5, Fig. 5 is the geometric representation that the embedding depth of proppant of the utility model one embodiment calculates, concrete, when pressure testing machine quits work, take out two blocks of core plates, use high-power microscope to take pictures to core plate proppant embedment face, after obtaining having the embedding picture of size, get point (1/cm at random
2, as shown in Fig. 5 circle) and got embedding circular radius r a little at random
n.The method of being tested by screen analysis calculates the particle diameter average of proppant, specifically by the particle diameter average of formula (1) calculation sample proppant
Wherein,
for particle diameter average, unit is mm; n
ifor the adjacent proppant mass fraction between sieve up and down of screen analysis experiment; d
ifor the adjacent average sieving mesh size up and down in screen analysis experiment;
Then processor device receives the embedded surface image that high power digital display micro mirror records, wherein, embedded surface image is the image with scale, processor device can be supported according to embedded surface image the embedding circular radius of agent, further, processor device is according to particle diameter average and embed the insert depth that circular radius calculates random taken point
Wherein, H
nfor the insert depth of random taken point, unit is mm;
In another embodiment of the utility model, in order to ensure the accuracy measured, many collections several groups of random points, utilize formula (3) to obtain the average insert depth of taken point, and namely required embedding depth of proppant, unit is mm.
Wherein, H is embedding depth of proppant, and n is counting at random of selection.
The method of testing and flow process that utilize proppant embedment measuring system are described below by an exemplary embodiments.
Description of test: experiment loading speed, loading stress value are forced closed speed and formation closure stress value after the actual pressing crack construction of certain block, and core plate gets core for this block is actual.
Experiment condition: the loading velocity of test is 15.68N/S, and loading stress value is 70MPa.425 ~ 850 μm of ceramsite propping agents selected by pressure break proppant.Use the full diameter core of 75mm, core plate is prepared into thickness 10mm, cross section is the circle of diameter 75mm, corresponding embedding mould is specification one: piston diameter 75mm, the high 88.9mm of piston, the diameter of section of cylindrical cavity is 75mm, cavity wall thickness 12.7mm, the high 76.2mm of cavity, bottom thickness 9.53mm.Pressure testing machine model is WHY-800, range 0-800kN.
Experimental procedure, as shown in Figure 6, step S1: put into by core plate and embed mould, lays proppant, puts into piston, treat that it slowly drops to stopping.Embedding mould is placed on the lower platen of pressure testing machine, connects pressure testing machine, displacement transducer, pressure sensor, signal acquiring board and computer.Concrete, first core plate is loaded in the cylindrical cavity embedding mould, takes 32.25g ceramsite propping agent, with 5kg/m
2laid even concentration laid on first core plate, add the second schist central layer, put into piston, after its stopping that slowly declining, the embedding mould loaded is positioned over the center of pressure test machine table top lower platen, displacement transducer, pressure sensor are connected with pressure testing machine, and displacement transducer, pressure sensor are connected with data acquisition board, data acquisition board is connected with computer.
Step S2: according to precedence, open total power switch, then starting pressure testing machine, start-up simulation machine control system, generally, need preheating 30 minutes, input experiment parameter on computers, namely setting loading speed is 15.68N/S (identical with closed speed), stress value 0-70Mpa.Here loading speed is identical with forced closed speed after particular block pressing crack construction, and is loaded into this block reservoir stress value.Rock after loading speed and on-load pressure simulate particular reservoir pressing crack construction closes speed and closure stress value.Optionally, different according to the core plate chosen, set different loading speeds and stress, wherein, the empirical value obtained when loading speed and stress are actual measurement.
Preferably, before inputting experiment parameter on computers, also comprise computer and control lower platen fast upwards, mould to be embedded will close to top board time, lower platen is stopped to continue upwards, load on pressure testing machine is carried out to the process of zeroing operation, effectively to eliminate pressure testing machine initial load to the interference of measurement result.
Step S3: after the stress recorded when pressure sensor arrives 70MPa, computer settings loading velocity is 0N/S, and stress is 70MPa, surely carries 35 hours, steady carry the time full after, lay down load, closing presure testing machine, computer, take out two blocks of core plates.Here the steady year time selected is 35 hours, steady determination of carrying the time carries out long-term water conservancy diversion test based on the rock core dissimilar to lava, mud stone etc., in experimentation, fracture width is measured constantly, until crack width, when changing, record is steady carries the time, and by a large amount of experimental datas and empirical method, surely the time of being carried is in 30 ~ 35 hours.Other embodiments of the utility model can carry the time according to the actual core board type setting chosen is steady.
Step S4: utilize high-power microscope to take two pieces of core plate embedded surfaces, obtain the embedding picture of scale, the embedding picture with scale is directed into processor device, processor device is according to getting point (1/cm at random
2) the embedding circular radius that obtains is r
n=0.25mm.Tested by screen analysis, according to
be supported agent particle diameter average
finally go out insert depth according to embedding circular radius and proppant particle diameter mean value computation.Wherein,
for particle diameter average, unit is mm; n
ifor the adjacent proppant mass fraction between sieve up and down of screen analysis experiment; d
ifor the adjacent average sieving mesh size up and down in screen analysis experiment.
Known by Fig. 5 embedding depth of proppant computational geometry schematic diagram:
H
n≈0.121mm
H
nfor random got embedding circular radius r
nthe insert depth of the point of=0.25mm, unit mm; H
nfor the insert depth of random taken point, unit is mm;
for particle diameter average, unit is mm; r
nfor embedding random a got radius of a circle in picture, unit is mm.
H
1, H
2, H
3h
nfor the insert depth of random taken point, unit is mm; H is all average insert depths got a little, namely required embedding depth of proppant, and unit is mm, n is counting at random of selection.
It should be noted that, can according to the certainty of measurement of setting, actual selection number of test points, the concrete number of the utility model to taken point does not limit.
Compared with prior art, the measuring system of the embedding depth of proppant that the utility model provides is simple when measuring embedding depth of proppant, principle is reliable, computational methods Consideration is comprehensive, completely avoid the impact that the factors such as proppant compacting, fragmentation cause experimental result, both reacted the truth acted between formation rock and fracturing propping agents, and repeated experiment can have been carried out for different reservoir rock again, experimental technique is simple, and result is accurate.The utility model not only can be used to describe the embedding situation of proppant in rock, also quantitatively insert depth can be calculated, avoid in experimentation and consider that the result that the error that many factors causes causes comparatively is greatly inaccurate, overcoming the defect of prior art, providing special equipment and measuring method for evaluating oil-gas field development fracturing propping agents insert depth.
The above is only for illustration of the technical solution of the utility model, and any those of ordinary skill in the art all without prejudice under spirit of the present utility model and category, can carry out modifying to above-described embodiment and change.Therefore, rights protection scope of the present utility model should be as the criterion depending on right.
Claims (9)
1. the measuring system of embedding depth of proppant, is characterized in that, described measuring system comprises: pressure testing machine, embedding mould, processor device, data acquisition unit and high power digital display micro mirror;
The platform of described pressure testing machine being placed described embedding mould, exerting pressure for giving described embedding mould;
Described embedding mould comprises cavity and the piston that has end uncovered, is provided with two blocks of core plates in described cavity, and laid between described core plate have proppant, and described piston is arranged on described core plate in time testing;
Described data acquisition unit is connected between described pressure testing machine and described processor device, sends it to described processor device for the parameter measured in course of exerting pressure;
Described processor device connects described pressure testing machine, runs for controlling described pressure testing machine;
Described high power digital display micro mirror is connected with processor device, for taking pictures to core plate embedded surface, and the core plate embedded surface image of shooting is sent to described processor device, and processor device exports the degree of depth of proppant embedment core plate.
2. the measuring system of embedding depth of proppant as claimed in claim 1, it is characterized in that, described data acquisition unit comprises pressure sensor and displacement transducer, is respectively used to the range information between the information of exerting pressure of gaging pressure testing machine and core plate.
3. the measuring system of embedding depth of proppant as claimed in claim 2, it is characterized in that, described measuring system also comprises data acquisition board, be connected between described processor device and described pressure sensor and institute's displacement sensors, for gathering the pressure information in course of exerting pressure and the range information between core plate, and send it to described processor device.
4. the measuring system of embedding depth of proppant as claimed in claim 1, it is characterized in that, described proppant is the ceramsite propping agent of 425 ~ 850 μm.
5. the measuring system of embedding depth of proppant as claimed in claim 1, it is characterized in that, the concentration of described proppant is 5kg/m
2.
6. the measuring system of embedding depth of proppant as claimed in claim 1, it is characterized in that, the thickness of described core plate is 10 ± 1mm.
7. the measuring system of embedding depth of proppant as claimed in claim 1, is characterized in that, the bottom thickness of described embedding mould is 9.53mm, sidewall thickness is 12.7mm.
8. the measuring system of embedding depth of proppant as claimed in claim 1, it is characterized in that, described embedding mould is a cylindrical chamber receptacle having end uncovered, and the cavity cross section of described embedding mould and described piston diameter are 75mm or 100mm or 120mm.
9. the measuring system of embedding depth of proppant as claimed in claim 8, it is characterized in that, described piston height is 88.9mm, and the height of described chamber receptacle is 76.2mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725676A (en) * | 2018-07-16 | 2020-01-24 | 中国石油天然气股份有限公司 | Self-supporting solid phase support seam width testing device |
| CN111720105A (en) * | 2020-08-04 | 2020-09-29 | 西南石油大学 | Diversion capacity prediction method considering particle size distribution of proppant |
| CN112146989A (en) * | 2019-06-28 | 2020-12-29 | 中国石油天然气股份有限公司 | Microcosmic visual multilayer self-supporting solid-phase elastoplasticity testing device and method |
| CN113091632A (en) * | 2021-04-15 | 2021-07-09 | 陕西延长石油（集团）有限责任公司 | Method for measuring embedding depth of proppant under simulated real fracturing working condition |
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2015
- 2015-06-05 CN CN201520382469.6U patent/CN204804827U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725676A (en) * | 2018-07-16 | 2020-01-24 | 中国石油天然气股份有限公司 | Self-supporting solid phase support seam width testing device |
| CN112146989A (en) * | 2019-06-28 | 2020-12-29 | 中国石油天然气股份有限公司 | Microcosmic visual multilayer self-supporting solid-phase elastoplasticity testing device and method |
| CN111720105A (en) * | 2020-08-04 | 2020-09-29 | 西南石油大学 | Diversion capacity prediction method considering particle size distribution of proppant |
| CN113091632A (en) * | 2021-04-15 | 2021-07-09 | 陕西延长石油（集团）有限责任公司 | Method for measuring embedding depth of proppant under simulated real fracturing working condition |
| CN113091632B (en) * | 2021-04-15 | 2022-09-20 | 陕西延长石油（集团）有限责任公司 | Method for measuring embedding depth of proppant under simulated real fracturing working condition |
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