CN101270641A - Miniature gravel filling simulation device and method for measuring gravel filling effect - Google Patents
Miniature gravel filling simulation device and method for measuring gravel filling effect Download PDFInfo
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- CN101270641A CN101270641A CNA2008101057355A CN200810105735A CN101270641A CN 101270641 A CN101270641 A CN 101270641A CN A2008101057355 A CNA2008101057355 A CN A2008101057355A CN 200810105735 A CN200810105735 A CN 200810105735A CN 101270641 A CN101270641 A CN 101270641A
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Abstract
The invention discloses a micro gravel packing simulator, which belongs to the field of well pacing. The simulator comprises a visible casing, an oil pipe installed in the visible casing, a fluid injection tube fixed on the underside of the visible casing and connected with the visible casing, a filter layer and a precision pressure gauge and a pressure control valve that are installed on the wall of the fluid injection tube. The invention also discloses a method of measuring the effect of gravel packing. The gravel is put into the visible casing and then fluid is injected into the visible casing. If the locking phenomenon of gravel happens, the test of gravel packing should be over. Otherwise, fluid injection pressure can be increased by the pressure control valve to measure the outflow from the oil pipe in unit time. The micro gravel packing simulator and the method can be used to measure the packing performance of the different gravel correctly and directly. In addition, the method is easy to be practiced, has low cost and offers reliable reference for choosing the proper gravel for packing under different oil extraction conditions.
Description
Technical field
The present invention relates to oil well filling field, the method for particularly a kind of miniature gravel filling simulation device and measurement gravel filling effect.
Background technology
Existing oil wells in field utilizes high-pressure pump that load fluid and filling gravel mixture are injected the stratum usually, to improve the cleanliness of the crude oil of being adopted.But in filling process, especially in the filling of horizontal well, there are a lot of problems: at first, can not observe gravel filling effect intuitively, can't calculate the degree of packing and the pack effectiveness of gravel pack; Secondly, fluid is taken the situation of sand in the unpredictable stowing operation, it is concrete and gross data is not as foundation reliably to be equipped with the gravel of which kind of specification for the screen casing of different size, and dependence experience is merely simply judged, therefore can't scientifically instruct actual production.
Summary of the invention
For the filling effect of the gravel of measuring the heterogeneity proportioning, so the gravel of definite different size screen casing corresponding specification that should be equipped with, the invention provides a kind of miniature gravel filling simulation device, this device comprises: oil pipe, visual sleeve pipe and fluid ascending pipe; Oil pipe is sleeved in the visual sleeve pipe, and fixedlys connected with visual sleeve pipe; The fluid ascending pipe is arranged on visual sleeve pipe bottom.
Have the oil pipe inlet on the oil pipe tube wall; Fluid ascending pipe tube wall is provided with first precision pressure gauge; Between fluid ascending pipe and visual sleeve pipe, be provided with filtration beds.
Visual sleeve pipe is made by transparent material.
Also be provided with second precision pressure gauge and pressure-control valve on the fluid ascending pipe tube wall of miniature gravel filling simulation device of the present invention; Second precision pressure gauge is below first precision pressure gauge, and pressure-control valve is between first precision pressure gauge and second precision pressure gauge.
The visual cover tube wall of miniature gravel filling simulation device of the present invention is provided with the back-up sand mouth and is used to close the gag of described back-up sand mouth.
The visual sleeve bottom edge of miniature gravel filling simulation device of the present invention is equipped with sealing ring.
The filtration beds of miniature gravel filling simulation device of the present invention is a double-decker.
The visual sleeve pipe open top edge of miniature gravel filling simulation device of the present invention is provided with the ring-shaped sleeve convex edge; Edge of opening at the oil pipe top is provided with ring-type oil pipe convex edge; Visual sleeve pipe and oil pipe are fixing by sleeve pipe convex edge and the assembling of oil pipe convex edge.
The oil pipe of miniature gravel filling simulation device of the present invention is made by transparent material.
The present invention also provides a kind of method of measuring gravel filling effect, and described method comprises:
Steps A: visual sleeve pipe is gone in gravel pack, reach the desire packed height, close the back-up sand mouth;
Step B: in visual sleeve pipe, inject fluid;
Step C: increase the injection pressure of fluid gradually, observe gravel and whether produce locking phenomenon, if then write down the height of gravel in the visual sleeve pipe, and finish to measure; Otherwise the force value of record fluid when visual sleeve pipe flows into oil pipe increases and the injection pressure of record fluid, measures the amount that flows out oil pipe at the unit interval inner fluid from the oil pipe outlet.
The beneficial effect of technical scheme provided by the invention is: the present invention uses above miniature gravel filling simulation device to test, can observe the take sand situation of gravel in fluid of variety classes and heterogeneity proportioning intuitively, and can accurately draw out the flow resistance curve map of various gravels, thereby contrast the filling effect of the gravel of variety classes and heterogeneity proportioning; Simultaneously, use miniature gravel filling simulation device of the present invention to test, the gravel that can also should be equipped with which kind of specification for the sand control screen of different size in the production of recovering the oil provides reliable theoretical foundation; Miniature gravel filling simulation device cost of the present invention is low, and technology is simple, is not measured environmental limitations, is applicable to various oil recovery conditions.In addition, the method for measurement gravel filling effect of the present invention need be by complex apparatus, and is simple to operate, be not subjected to environmental factor disturb and intuitive measurement results accurate, can provide theoretical accurately for the oil producing operation of oil well and ensure.
Description of drawings
Fig. 1 is the whole sectional drawing of the miniature gravel filling simulation device that provides of the embodiment of the invention 1;
Fig. 2 is the flow chart of the method for the measurement gravel filling effect that provides of the embodiment of the invention 2.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the miniature gravel filling simulation device that the embodiment of the invention provides comprises oil pipe 2, visual sleeve pipe 7 and fluid ascending pipe 4.Wherein, visual sleeve pipe 7 is cylindric, adopts transparent material to make, and for example organic glass, glass or transparent plastic etc. can be observed the state of gravels 8 and fluid in the visual sleeve pipe 7 so intuitively.Epimere at visual sleeve pipe 7 has back-up sand mouth 15, the size of back-up sand mouth 15 should guarantee gravel 8 thus back-up sand mouth 15 successfully be received in the visual sleeve pipe 7.Back-up sand mouth 15 is furnished with the gag 6 that is complementary with it, after measurement finishes with gravel pack, and can be with gag 6 with 15 sealings of back-up sand mouth.The upper end of visual sleeve pipe 7 is bonded with circular sleeve pipe convex edge 12, is used for visual sleeve pipe 7 and oil pipe 2 assemblings fixing.
The bottom arrival end of visual sleeve pipe 7 is provided with filtration beds 9, prevents to miss in visual sleeve pipe 7 at stowing operation cobblestone.The area of filtration beds 9 is identical with interior section surface area of visual sleeve pipe 7.Filtration beds 9 can be arranged to two-layer, and wherein the upper strata mesh is bigger, and lower floor's mesh is less, and the concrete size of its mesh can be determined according to the specification of filling gravel.
Be set with oil pipe 2 in visual sleeve pipe 7, oil pipe 2 upper end open form oil pipe outlet 16, the lower tip sealing.The internal diameter of oil pipe 2 is about 1/3rd of visual sleeve pipe 7, and the length of oil pipe 2 can be determined according to practical measurement requirement, can be about 2/3rds of visual sleeve pipe 7.The tube wall of oil pipe 2 also can be made of transparent material, like this can be so that observe the situation of injecting fluid and fluid motion in the oil pipe 2.Oil pipe 2 tops are bonded with ring-type oil pipe convex edge 13, and the width of oil pipe convex edge 13 guarantees can be fixing with sleeve pipe convex edge 12 overlap joints and the assembling on visual sleeve pipe 7 tops.Oil pipe 2 is sleeved on the inside of visual sleeve pipe 7,, so just can link together visual sleeve pipe 7 and oil pipe 2 oil pipe convex edge 13 and sleeve pipe convex edge 12 positioning and fixing by fastening devices, and be the container of U-shaped also simultaneously at visual sleeve pipe 7 inner formation tangent planes.Have oil pipe inlet 1 on the epimere tube wall of oil pipe 2, fluid in the visual sleeve pipe 7 and gravel can flow in the oil pipe 2 by this oil pipe inlet 1.
On fluid ascending pipe 4 tube walls, pressure-control valve 5 is installed, can controls the pressure of the fluid that injects visual sleeve pipe 7 by pressure-control valve 5.Diverse location also is equipped with two precision pressure gauges on the tube wall of fluid ascending pipe 4.Wherein, second precision pressure gauge 11 is installed in pressure-control valve 5 lower ends, first precision pressure gauge 10 is installed in pressure-control valve 5 upper ends, by the fluid of external input equipment input second precision pressure gauge 11 of at first flowing through, measure the initial pressure of fluids according to second precision pressure gauge 11 after, can be by pressure-control valve 5 regulated fluid pressure, after this, through the fluid of pressure regulation first precision pressure gauge 10 of flowing through, measure the injection pressure of fluid after, final fluid is injected in the visual sleeve pipe 7.
Longshore current body ascending pipe 4 is provided with annular ascending pipe convex edge 14 with the excircle of the contact surface of visual sleeve pipe 7, and visual sleeve pipe 7 is fixed on this ascending pipe convex edge 14.In order to guarantee that 14 of visual sleeve pipe 7 and ascending pipe convex edges fluid do not take place ooze dew, visual sleeve pipe 7 lower end excircles also are provided with an O-ring seal 3 in 14 upper edges, ascending pipe convex edge.
Adopt above miniature gravel filling simulation device, can accurately measure the take sand situation of gravel in fluid, also can contrast the filling effect of gravel in oil well of variety classes and heterogeneity proportioning simultaneously.
Referring to Fig. 1 and Fig. 2, the embodiment of the invention also provides a kind of method of measuring gravel filling effect, specifically may further comprise the steps:
Step 201: selected a kind of gravel, the quality of the pre-filling gravel of weighing, and determine that the desire packed height of gravel in the visual sleeve pipe 7 is 300mm;
Step 202: load weighted gravel is inserted in the visual sleeve pipe 7 from the back-up sand mouth 15 of miniature gravel filling simulation device, when the packed height of gravel in the visual sleeve pipe 7 reaches 300mm, stop filling, close the back-up sand mouth, the residual mass of the pre-filling gravel of weighing calculates the actual filling quality of gravels in the visual sleeve pipe 7;
Step 203: start external fluid input equipment, fluid incoming fluid ascending pipe 4, observe second precision pressure gauge 11, when pressure surpasses 0.02MPa, regulate pressure-control valve 5 decompressions, and guarantee to show that fluid injection pressure registration is 0.02MPa when fluid through pressure-control valve 5 is by first precision pressure gauge 10 that fluid injects in the visual sleeve pipe 7 by filtration beds 9;
Step 204: regulate pressure-control valve 5, increase the fluid injection pressure gradually, observe whether gravel locking phenomenon takes place in fluid if, execution in step 205, otherwise execution in step 206;
" locking phenomenon " is meant that gravel can not carried by fluid under the impact with certain pressure fluid mobile, and remain basicly stable state, and the gravel that can produce locking phenomenon can think to have good filling effect.
Step 205: finish experiment, the height value of record gravel in visual sleeve pipe 7;
Step 206: regulate pressure-control valve 5, increase the fluid injection pressure gradually, the liquid level of visual sleeve pipe 7 inner fluids can constantly raise, until fluid when the oil pipe inlet 1 of oil pipe tube wall flows into oil pipe 2, the record pressure registration that this moment first, precision pressure gauge 10 showed;
Step 207: continue to regulate pressure-control valve 5, increase the injection pressure of fluid gradually, after fluid fills up oil pipe 2 fully, can flow out, the record registration that this moment first, precision pressure gauge 10 showed from oil pipe outlet 16;
Step 208: continue to regulate pressure-control valve 5, with fluid injection pressure rising 0.02MPa, measure and be recorded in time period of 30 seconds, fluid flows out the amount of oil pipes from oil pipe outlet 16;
Be to obtain multi-group data, can be by regulating pressure-control valve 5, with the injection pressure of the fluid 0.02MPa that raises at every turn, measure the amount that in 30 seconds time period, flows out oil pipes 2 at fluid under the different injection pressures from oil pipe outlet 16.
After having tested, can draw out certain particular types or have the flow resistance curve of the gravel of special component proportioning according to the pressure that obtains in the experiment and flow parameter, this curve can reflect the filling effect of this kind gravel in fluid intuitively.
In addition, in actual applications, the gravel that can also change other kind or have other composition proportion adopts the technical scheme of present embodiment, thereby measures the filling effect of different gravels.
Through aforesaid operations, can accurately draw out variety classes or have the flow resistance curve of the gravel of heterogeneity proportioning according to measurement result, thereby can intuitively contrast variety classes or have the filling effect of the gravel of heterogeneity proportioning, provide reliable foundation for selecting pack gravel in the actual oil producing operation process.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a miniature gravel filling simulation device is characterized in that, described device comprises oil pipe, visual sleeve pipe and fluid ascending pipe; Described oil pipe is sleeved in the described visual sleeve pipe, and fixedlys connected with described visual sleeve pipe; Described fluid ascending pipe is arranged on described visual sleeve pipe bottom;
On described oil pipe tube wall, have the oil pipe inlet; Described fluid ascending pipe tube wall is provided with first precision pressure gauge; Between described fluid ascending pipe and described visual sleeve pipe, be provided with filtration beds.
Described visual sleeve pipe is made by transparent material.
2. miniature gravel filling simulation device according to claim 1 is characterized in that, also is provided with second precision pressure gauge and pressure-control valve on the described fluid ascending pipe tube wall; Described second precision pressure gauge is below described first precision pressure gauge, and described pressure-control valve is between described first precision pressure gauge and described second precision pressure gauge.
3. miniature gravel filling simulation device according to claim 1 is characterized in that, described visual cover tube wall is provided with the back-up sand mouth and is used to close the gag of described back-up sand mouth.
4. miniature gravel filling simulation device according to claim 1 is characterized in that, at described visual sleeve bottom edge sealing ring is installed.
5. miniature gravel filling simulation device according to claim 1 is characterized in that, described filtration beds is a double-decker.
6. miniature gravel filling simulation device according to claim 1 is characterized in that, is provided with the ring-shaped sleeve convex edge at described visual sleeve pipe open top edge; Edge of opening at described oil pipe top is provided with ring-type oil pipe convex edge; Described visual sleeve pipe and described oil pipe are fixing by described sleeve pipe convex edge and the assembling of described oil pipe convex edge.
7. miniature gravel filling simulation device according to claim 1 is characterized in that described oil pipe is made by transparent material.
8. a method of measuring gravel filling effect is characterized in that, described method comprises:
Steps A: visual sleeve pipe is gone in gravel pack, reach the desire packed height, close the back-up sand mouth;
Step B: in visual sleeve pipe, inject fluid;
Step C: increase the injection pressure of fluid gradually, observe gravel and whether produce locking phenomenon, if then write down the height of gravel in the visual sleeve pipe, and finish to measure; Otherwise the force value of record fluid when visual sleeve pipe flows into oil pipe increases and the injection pressure of record fluid, measures the amount that flows out oil pipe at the unit interval inner fluid from the oil pipe outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101057355A CN101270641A (en) | 2008-04-30 | 2008-04-30 | Miniature gravel filling simulation device and method for measuring gravel filling effect |
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| CNA2008101057355A CN101270641A (en) | 2008-04-30 | 2008-04-30 | Miniature gravel filling simulation device and method for measuring gravel filling effect |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305045A (en) * | 2011-08-05 | 2012-01-04 | 中联煤层气国家工程研究中心有限责任公司 | Shaft crack simulator |
| CN103015952A (en) * | 2012-12-12 | 2013-04-03 | 山东瑞丰石油技术有限责任公司 | Method for packing multiple layers of gravel in one time |
| CN103452533A (en) * | 2013-08-06 | 2013-12-18 | 中国石油天然气股份有限公司 | Visual simulation test device for horizontal well gravel packing |
| CN104265248A (en) * | 2014-09-10 | 2015-01-07 | 甘肃蓝科石化高新装备股份有限公司 | Horizontal well sand filling test shaft device |
| CN105181897A (en) * | 2015-09-06 | 2015-12-23 | 中国石油天然气股份有限公司 | Sand filling coiler used for analyzing migration fractionation effect of natural gas |
| CN107044273A (en) * | 2017-04-07 | 2017-08-15 | 中国石油大学(华东) | Sand control pit shaft blocks the integrated evaluation experimental analogue means of de-plugging and method |
| CN107100596A (en) * | 2017-06-28 | 2017-08-29 | 长江大学 | A kind of gravel preliminary filling action of gravel pack sandscreen |
| CN107795303A (en) * | 2017-11-30 | 2018-03-13 | 青岛海洋地质研究所 | Hydrate recovery well cased hole gravel packing analogue system and method |
| CN108035705A (en) * | 2017-11-30 | 2018-05-15 | 中国石油大学(北京) | A kind of experimental method for simulating loose sand oil accumulation sand block filter medium clogging |
| CN114961665A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（武汉） | Hydrate reservoir visual gravel packing simulation experiment system and method |
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2008
- 2008-04-30 CN CNA2008101057355A patent/CN101270641A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305045A (en) * | 2011-08-05 | 2012-01-04 | 中联煤层气国家工程研究中心有限责任公司 | Shaft crack simulator |
| CN103015952A (en) * | 2012-12-12 | 2013-04-03 | 山东瑞丰石油技术有限责任公司 | Method for packing multiple layers of gravel in one time |
| CN103015952B (en) * | 2012-12-12 | 2015-07-15 | 山东瑞丰石油技术有限责任公司 | Method for packing multiple layers of gravel in one time |
| CN103452533B (en) * | 2013-08-06 | 2016-01-06 | 中国石油天然气股份有限公司 | Visual horizontal well gravel fills simulation test device |
| CN103452533A (en) * | 2013-08-06 | 2013-12-18 | 中国石油天然气股份有限公司 | Visual simulation test device for horizontal well gravel packing |
| CN104265248A (en) * | 2014-09-10 | 2015-01-07 | 甘肃蓝科石化高新装备股份有限公司 | Horizontal well sand filling test shaft device |
| CN105181897A (en) * | 2015-09-06 | 2015-12-23 | 中国石油天然气股份有限公司 | Sand filling coiler used for analyzing migration fractionation effect of natural gas |
| CN107044273A (en) * | 2017-04-07 | 2017-08-15 | 中国石油大学(华东) | Sand control pit shaft blocks the integrated evaluation experimental analogue means of de-plugging and method |
| US10697277B2 (en) | 2017-04-07 | 2020-06-30 | China University Of Petroleum (East China) | Simulation device and method for integrated evaluation experiment for sand control wellbore plugging and plugging removal |
| CN107100596A (en) * | 2017-06-28 | 2017-08-29 | 长江大学 | A kind of gravel preliminary filling action of gravel pack sandscreen |
| CN107795303A (en) * | 2017-11-30 | 2018-03-13 | 青岛海洋地质研究所 | Hydrate recovery well cased hole gravel packing analogue system and method |
| CN108035705A (en) * | 2017-11-30 | 2018-05-15 | 中国石油大学(北京) | A kind of experimental method for simulating loose sand oil accumulation sand block filter medium clogging |
| CN107795303B (en) * | 2017-11-30 | 2023-08-08 | 青岛海洋地质研究所 | Gravel pack simulation system and method in hydrate exploitation well pipe |
| CN114961665A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（武汉） | Hydrate reservoir visual gravel packing simulation experiment system and method |
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Open date: 20080924 |