CN102518421A - Physical simulation visualization experimental device and forming method thereof - Google Patents

Physical simulation visualization experimental device and forming method thereof Download PDF

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Publication number
CN102518421A
CN102518421A CN2011104395497A CN201110439549A CN102518421A CN 102518421 A CN102518421 A CN 102518421A CN 2011104395497 A CN2011104395497 A CN 2011104395497A CN 201110439549 A CN201110439549 A CN 201110439549A CN 102518421 A CN102518421 A CN 102518421A
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branch
main hole
pit shaft
casing
well
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CN102518421B (en
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韩国庆
吴晓东
朱明�
安永生
高慎帅
张睿
曹光朋
范卫潮
高飞
徐立坤
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China University of Petroleum Beijing CUPB
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China University of Petroleum Beijing CUPB
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Abstract

The invention discloses a physical simulation visualization experimental device and a forming method thereof. The experimental device comprises a cubic box body, a water injection well and a horizontal production well, wherein in the top of the box body is provided with a top cover, and the box body is filled with porous media; one end of the water injection well is arranged in the box body, the other end of the water injection well extends out of the box body to be exposed; the horizontal production well is horizontally arranged and comprises a main shaft, the tail end of the main shaft is connected with a connecting shaft, the side edge of the main shaft is provided with at least one branch shaft located on a horizontal plane of the main shaft, both the main shaft and the branch shaft are located in the box body, the connecting shaft is located on the outside of the box body, and the main shaft and the branch shaft are both evenly provided with a plurality of ejecting holes. The physical simulation visualization experimental device and the forming method of the physical simulation visualization experimental device can simultaneously simulate the horizontal production well and the water injection well in a three-dimensional simulation mode and can approximately simulate production trend of oil deposit.

Description

Physical analogy visual experimental apparatus and forming method thereof
Technical field
The invention relates to a kind of physical analogy visual experimental apparatus and forming method thereof.
Background technology
Three-dimensional visualization physical simulation experiment system can reflect in the exploitation bottom water reservoir process intuitively, truly; The form and the rate of climb of the water awl of horizontal production well under different water cut rate and producing pressure differential condition, the water logging that can reflect horizontal production well are dynamically and pattern.Mobile darcy flow rule, the experiment of thing mould and the true oil reservoir of meeting satisfying the model equipment inner fluid has under the prerequisite of certain comparativity; The visual physical simulation experiment equipment of applying three-dimensional; The formation and development process that the water ridge advances at the bottom of when having simulated usage level producing well exploitation homogeneous bottom water reservoir effectively; And the time of oil reservoir water breakthrough, thereby the water breakthrough rule of horizontal production well under different production pressure reduction in the bottom water reservoir and the varying level producing well length is studied.
The usage level producing well is developed the process of oil reservoir and carried out physical simulation experiment, utilize the water power simulation both at home and abroad mostly or adopt artificial sandpack column that the seepage field of horizontal production well surrounding space and the distribution characteristics of pressure field are analyzed and studied.At present, in the relevant document of horizontal production well, all be to adopt method for numerical simulation to confirm the variation of horizontal production well exploitation water breakthrough moisture content afterwards.
Existing bottom water reservoir horizontal production well three-dimensional visualization physical simulating device.This device is become by end water supply system, three-dimensional visualization model and record metering set of systems.The three-dimensional visualization model is a kind of experimental facilities that is formed through chloroform (chloroform) bonding by transparent poly (methyl methacrylate) plate.
Because in the above-mentioned three-dimensional visualization physical simulating device; What Visualization Model adopted is poly (methyl methacrylate) plate; What the medium of simulating oil deposit adopted is bead, and what pit shaft adopted is lucite tube, and metering system adopts is equipment such as graduated cylinder; Therefore, the defective that in for the simulation bottom water reservoir, has the following aspects:
(1) in above-mentioned visual physical simulation experiment, can only be separately to injecting well or, can not simulating to well pattern to the simulation of producing well.
(2) simulation of reservoir of porous medium adopts bead and real sandy ground layer to differ too much, and this similarity for simulation has very big influence, for the degree of accuracy of testing certain influence degree is arranged.
(3) measuring system exists error bigger.Fluid metering in this measuring system adopts instruments such as graduated cylinder, reads data through the staff, just adopts human metering, will have artificial error like this, has increased the inaccuracy of measurement result greatly, has influenced the precision of measuring.
(4) lucite tube is adopted in the pit shaft simulation, does not consider the roughness of organic glass inside pipe wall, and in fact glass is a smoother, so just greatly reduces the resistance of pit shaft.Yet in the pit shaft of reality, be to have certain pit shaft resistance, and this resistance can not ignore the influence of oil reservoir production capacity, so lucite tube can not objectively reflect the truth of pit shaft in the oil reservoir.
(5) this three-dimensional visualization model is difficult to simulate thin oil reservoir.For the thin oil reservoir of reservoir thickness, this model can not be realized.If adopt this model to simulate the thin oil reservoir of oil reservoir, reservoir pressure etc. all is difficult to realize so.
Summary of the invention
The objective of the invention is, a kind of physical analogy visual experimental apparatus is provided, the mode that it can three-dimensional simulation is simulated horizontal production well and water injection well simultaneously, thereby can a more approximate simulation dynamically be arranged to oil reservoir production.
Another object of the present invention is that a kind of formation method of physical analogy visual experimental apparatus is provided.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
A kind of physical analogy visual experimental apparatus, it comprises:
Casing, it is cube, and the top of said casing has top cover, is filled with porous media in the said casing;
Water injection well, one of which end are located in the said casing, and the other end stretches out said casing and exposes;
Horizontal production well, it is horizontally disposed with, and said horizontal production well comprises main hole; The tail end of said main hole is connected with connecting cylinder; The side of said main hole is provided with at least one branch's pit shaft, and said branch pit shaft is positioned on the horizontal plane of said main hole, and said main hole and branch's pit shaft all are positioned at the inside of said casing; And connecting cylinder is positioned at the outside of said casing, all is provided with a plurality of perforations on said main hole and the branch's pit shaft equably.
In preferred embodiment, the external packets of said main hole and branch's pit shaft is covered with sand control screens; Said perforation is an interval square crossing formula perforation.
In preferred embodiment, said water injection well is vertical setting, and it is positioned at the marginal portion of said casing.
In preferred embodiment, said experimental facilities also comprises the seepage flow plate, is connected in the said casing said seepage flow plate level, and said water injection well flatly is positioned at the below of said seepage flow plate, and said horizontal production well is positioned at the top of said seepage flow plate.
In preferred embodiment, said main hole and branch's pit shaft are steel pipe and process, and said main hole is welded to each other with the branch pit shaft and is connected.
In preferred embodiment, the angle between said branch pit shaft and the said main hole is that said main hole is identical with the diameter of branch's pit shaft between 0 °-90 °.
In preferred embodiment, the angle between said branch pit shaft and the said main hole is 30 °, 45 ° or 60 °.
In preferred embodiment, said porous media thing is a fine sand, perhaps is the mixture of montmorillonite powder and sand, and the mixed proportion of montmorillonite powder and sand is 1: 4.
A kind of formation method of visual experimental apparatus, it comprises step:
Form casing; Water injection well and horizontal production well; Said horizontal production well comprises main hole, and the tail end of said main hole is connected with connecting cylinder, and the side of said main hole is provided with at least one branch's pit shaft; Said branch pit shaft is positioned on the horizontal plane of said main hole, all is provided with a plurality of perforations on said main hole and the branch's pit shaft equably;
Water injection well and horizontal production well are put into casing;
Porous media inserted carry out compacting in the said casing, water injection well and horizontal production well are covered by among the porous media;
Adopt to inject the method for water porous media carried out water saturation, and then the mode that adopts oily expelling water that porous media is carried out oil is saturated, to simulate the profit distribution in the prime stratum fully, so form visual experimental apparatus.
The characteristics and the advantage of visual experimental apparatus of the embodiment of the invention and forming method thereof are:
1, the mode that it can three-dimensional simulation is simulated horizontal production well and water injection well simultaneously, and the research of water breakthrough rule dynamically had an individual more approximate simulation to oil reservoir production when simulation bottom water reservoir ridge advanced phenomenon with the bottom water reservoir exploitation.
2, in visual physical simulation experiment in the past, simulation be single horizontal well straight well, can not simulate multilateral well; The embodiment of the invention make this experimental facilities to simulate multi-branched horizontal well, and the application of multilateral well more and more widely, so this experimental facilities has improved the popularity of its use because horizontal production well comprises main hole and branch's pit shaft.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the experimental system sketch map that includes visual experimental apparatus of the present invention;
Fig. 2 is the schematic perspective view of first kind of embodiment of visual experimental apparatus of the present invention, and it can be used for the simulation that heat-bodied oil is hidden;
Fig. 3 is that the master of first kind of embodiment of visual experimental apparatus of the present invention looks sketch map;
Fig. 4 is the schematic perspective view of second kind of embodiment of visual experimental apparatus of the present invention, and it can be used for the simulation of thin oil reservoir;
Fig. 5 is that the master of second kind of embodiment of visual experimental apparatus of the present invention looks sketch map;
Fig. 6 A is that the master of first kind of structure of a Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 6 B is that the master of second kind of structure of a Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 6 C is that the master of the third structure of a Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 7 A is that the master of first kind of structure of two Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 7 B is that the master of second kind of structure of two Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 7 C is that the master of the third structure of two Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 7 D is that the master of the 4th kind of structure of two Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 8 A is that the master of first kind of structure of three Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 8 B is that the master of second kind of structure of three Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 8 C is that the master of the third structure of three Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 8 D is that the master of the 4th kind of structure of three Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 9 A is that the master of first kind of structure of four Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 9 B is that the master of second kind of structure of four Multilateral Wells of visual experimental apparatus of the present invention looks sketch map;
Fig. 9 C is that the master of the third structure of four Multilateral Wells of visual experimental apparatus of the present invention looks sketch map.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
At first as follows to some related among this paper technical term explanations:
Visual: as through Real Time Observation, can to observe sightless object, the Real-time and Dynamic of things is the most directly observed to things.
Horizontal production well: when getting into the target zone position, well section gradient surpasses 85 degree, and its horizontal range surpasses the well of 10 times of target zone thickness horizontal production well.
Multilateral Wells: refer to have in the main borehole two or more bifurcated wells to get into the well of oil (gas) layer.
The horizontal production well net: with a certain oil-bearing layer is horizontal production well and the horizontal flood well that target designs, by its well pattern of forming.
Seepage flow and subsurface seepage flow: mobile the be called seepage flow of fluid in porous media.Fluid flows in the stratum and is called subsurface seepage flow.
Di Shui and Bian Shui: in oil (gas) was hidden, all there was the water that is holding in the palm oil (gas) oil (gas) the layer bottom in the scope of whole oil-containing (gas) border (edge) in end water; Only the water that is holding in the palm oil (gas) is arranged in limit water in oil (gas) the layer bottom of oil (gas) Zang Bianbu (air water or water to oil area).
Closed boundary: refer to that border that oil reservoir surrounded by impermeable rock stratum or tomography is the closed boundary.After the closed boundary influence reached pit shaft, reservoir pressure rate over time was a constant, and promptly pressure and time are in linear relation.
The level pressure border: have huge pneumatic jack, when enlivening limit water or periferal water flooding, borderline pressure can be regarded not time to time change as, this border is on the level pressure border.
Because it is more that the horizontal segment of horizontal well gos deep in oil reservoir, therefore when setting up physical models of reservoir, not only to consider fluid flowing in porous media, to consider that also fluid flows in the horizontal segment pit shaft of horizontal well.The similarity criterion of foundation is as shown in the table:
Embodiment one
The embodiment of the invention has proposed a kind of physical analogy visual experimental apparatus A, and it comprises casing 1, water injection well 2 and horizontal production well 3.Said casing 1 is cube, and its top has top cover 1a, is filled with porous media in the said casing 1.One end of said water injection well 2 is located in the said casing 1, and the other end stretches out said casing 1 and exposes.Said horizontal production well 3 is for being horizontally disposed with; Said horizontal production well 3 comprises main hole 3a, and the tail end of said main hole 3a is connected with connecting cylinder 3b, and the side of said main hole 3a is provided with at least one pit shaft 3c of branch; The said pit shaft 3c of branch is positioned on the horizontal plane of said main hole 3a; Said main hole 3a and the pit shaft 3c of branch all are positioned at the inside of said casing 1, and connecting cylinder 3b is positioned at the outside of said casing 1, all is provided with a plurality of perforations 4 equably on said main hole 3a and the pit shaft 3c of branch.
Wherein, porous media can be bead, fine sand; The perhaps mixture of montmorillonite powder and sand; The The Best Mixed ratio of montmorillonite powder and sand is 1: 4, and this is because ratio is 1: 4th, because this ratio can form the requirement of required low-permeability, after this ratio proportioning; Through compacting, its porous media permeability can reach between 6 millidarcies-30 millidarcy.In addition, said water injection well 2 only comprises main hole 3a, is evenly distributed with perforation 4 on this main hole 3a.
When needs carry out simulated experiment, adopt the dried method of filling out to form experimental facilities, specifically be; Water injection well 2 and horizontal production well 3 are put into casing 1; And fine sand successively inserted in the said casing 1 carry out compacting, water injection well 2 is covered by among the fine sand with horizontal production well 3, adopts the method for injecting water earlier fine sand to be carried out water saturation; And then the mode that adopts oily expelling water that fine sand is carried out oil is saturated, the profit in the simulated formation distributes so fully.Then, with bucket B, electric pump C, intermediate receptacle D and pressure gauge E connect, and pipeline one end that connects pressure gauge E is connected on the end that said water injection well 2 exposes, and device F is measured in water-oil separating be connected on the said connecting cylinder 3b that exposes, and be as shown in Figure 1.Start electric pump C at last; Make water little by little inject water injection well 2, promptly adopt the mode of water drive to annotate and adopt, from water-oil separating metering device, read the profit amount of from horizontal production well 3, coming out; Obtain the moisture content of this section in the time with this, so the production of oil reservoir is simulated.In this process, adopt video recording equipment G and photographic means H, experimentation is carried out complete monitoring; Monitor data can be stored in the computer, when experiment is accomplished, takes shakeout layer by layer; Thereby its process is monitored, also made things convenient for the water logging phenomenon of every layer of real time record simultaneously.Through record, through handling reduction end water or edge water drive fuel oil meter rule to the water logging zone.
The embodiment of the invention is simulated horizontal production well 3 and water injection well 2 with the mode of three-dimensional simulation simultaneously, and oil reservoir production is dynamically had a more approximate simulation.And, because horizontal production well 3 comprises main hole 3a and the pit shaft 3c of branch, make this experimental facilities to simulate to multi-branched horizontal well, improved the popularity of its use.
In addition, present embodiment has adopted the automatic separate measurement device of profit F, and it is mainly used in profit flow automatic gauge, but the automatic gauge of oil, the water yield, data acquisition and control automatically in the implementation model output liquid.Secondary meter can show accumulation output oil, the water yield of each well section in real time.According to output profit amount within a certain period of time, thereby obtain the moisture content in this section period.
According to an embodiment of the invention, the external packets of said main hole 3a and the pit shaft 3c of branch is covered with sand control screens, and sand control screens can prevent as much as possible that porous media from getting among main hole 3a and the pit shaft 3c of branch from perforation 4.Said perforation is an interval square crossing formula perforation 4, particularly, on the stack shell of main hole 3a and the pit shaft 3c of branch, upwards is being provided with multiple row (being provided with four row herein) perforation 4 its week, and the perforation 4 between adjacent two row staggers in the axial direction each other.
Said main hole 3a and the pit shaft 3c of branch are steel pipe and process, and main hole 3a is welded to each other with the pit shaft 3c of branch and is connected, and are welded to connect the connection that makes between main hole 3a and the pit shaft 3c of branch and reinforce, and have increased the voltage endurance capability of well.Pit shaft adopts lucite tube in the prior art; Its inwall smoother so greatly reduces the resistance of pit shaft, and because the restriction of the properties of materials that it adopted; The scope of the reservoir pressure of renders simulation has received very big restriction; The pressure of oil reservoir is too small, and the influence through pit shaft resistance and filtrational resistance causes the result of measurement accurate inadequately; And there is certain pit shaft resistance in the inwall of the steel pipe of present embodiment, therefore can more can reflect the truth of pit shaft in the oil reservoir objectively.
Furthermore, the angle between said pit shaft 3c of branch and the said main hole 3a is between 0 °-90 °, exactly, is that pit shaft 3c of branch and main hole 3a are between 0 °-90 ° towards the angle that the one side on top constitutes.For example, the angle between pit shaft 3c of branch and the said main hole 3a can be 30 °, 45 ° and 60 °.Said main hole 3a is identical with the diameter of the pit shaft 3c of branch.
The pit shaft 3c of branch in the side setting of said main hole 3a can have one, two, three or four, is called a Multilateral Wells respectively, two Multilateral Wells, three Multilateral Wells or four Multilateral Wells.For the above well of two Multilateral Wells or two branches; The pit shaft 3c of branch can be positioned at phase the same side of main hole 3a, also can be positioned at the not homonymy of main hole 3a, and is unrestricted at this; The distance that just is positioned at the pit shaft 3c of branch of same side can not be near excessively, to avoid producing each other impedance.In the ordinary course of things; The position that the pit shaft 3c of branch is arranged on the main hole 3a can have: on the top of main hole 3a; In 1/4 position of main hole 3a, in 1/3 position of main hole 3a, in 1/2 position of main hole 3a apart from its top apart from its top apart from its top; In 2/3 position of main hole 3a, perhaps in 3/4 position of main hole 3a apart from its top apart from its top.
Particularly, Fig. 6 A-Fig. 6 C has shown several kinds of structures of a Multilateral Wells.Shown in Fig. 6 A, the pit shaft 3c of branch is positioned at 1/3 position of main hole 3a apart from its top.Shown in Fig. 6 B, the pit shaft 3c of branch is positioned at 1/2 position of main hole 3a apart from its top.Shown in Fig. 6 C, the pit shaft 3c of branch is positioned at the top end of said main hole 3a.
Fig. 7 A-Fig. 7 D has shown several kinds of structures of two Multilateral Wells, wherein, for ease of describing, two branch's pit shafts of the side setting of said main hole 3a is called first branch's pit shaft and second branch's pit shaft respectively.Shown in Fig. 7 A, first and second branch's pit shaft lays respectively at the both sides of main hole 3a, and first branch's pit shaft is positioned at 1/3 position apart from its top of main hole 3a, and second branch's pit shaft is positioned at 2/3 position apart from its top of main hole 3a.Shown in Fig. 7 B, first and second branch's pit shaft is positioned at phase the same side of main hole 3a, and first branch's pit shaft is positioned at 1/3 position apart from its top of main hole, and second branch's pit shaft is positioned at 2/3 position apart from its top of main hole.Shown in Fig. 7 C, first and second branch's pit shaft lays respectively at the both sides of main hole, and first and second branch's pit shaft all is positioned at 1/3 position apart from its top of main hole 3a.Shown in Fig. 7 D, first and second branch's pit shaft is positioned at phase the same side of main hole, and first branch's pit shaft is positioned at main hole 3a top end, and second branch's pit shaft is positioned at 1/2 position apart from its top of main hole 3a.
Fig. 8 A-Fig. 8 D has shown several kinds of structures of three Multilateral Wells, wherein, for ease of describing, three branch's pit shafts of the side setting of said main hole 3a is called first branch's pit shaft respectively, second branch's pit shaft and the 3rd branch's pit shaft.Shown in Fig. 8 A; First and third branch's pit shaft is positioned at phase the same side of main hole 3a; Second branch's pit shaft is positioned at the other side of main hole 3a; And first branch's pit shaft is positioned at main hole 3a top, and second branch's pit shaft is positioned at 1/3 position apart from its top of main hole 3a, and the 3rd branch's pit shaft is positioned at 2/3 position apart from its top of main hole 3a.Shown in Fig. 8 B; First and third branch's pit shaft is positioned at phase the same side of main hole 3a; Second branch's pit shaft is positioned at the other side of main hole 3a, and first and second branch's pit shaft all is positioned at main hole 3a top, and the 3rd branch's pit shaft is positioned at 2/3 position apart from its top of main hole 3a.Shown in Fig. 8 C; First and third branch's pit shaft is positioned at phase the same side of main hole 3a; Second branch's pit shaft is positioned at the other side of main hole 3a, and first branch's pit shaft is positioned at main hole 3a top, and second and third branch's pit shaft all is positioned at 1/2 position apart from its top of main hole 3a.Shown in Fig. 8 D; First, second and third branch's pit shaft all is positioned at phase the same side of main hole 3a; First branch's pit shaft is positioned at main hole 3a top; Second branch's pit shaft is positioned at 1/3 position apart from its top of main hole 3a, and the 3rd branch's pit shaft is positioned at 2/3 position apart from its top of main hole 3a.
Fig. 9 A-Fig. 9 C has shown several kinds of structures of four Multilateral Wells, wherein, for ease of describing, four branch's pit shafts of the side setting of said main hole 3a is called first branch's pit shaft respectively, second branch's pit shaft, the 3rd branch's pit shaft and the 4th branch's pit shaft.Shown in Fig. 9 A; First and third branch's pit shaft is positioned at phase the same side of main hole 3a; The second, four branch's pit shafts are positioned at the other side of main hole 3a; And first and second branch's pit shaft all is positioned at 1/3 position apart from its top of main hole 3a, and third and fourth branch's pit shaft is positioned at 2/3 position apart from its top of main hole 3a.Shown in Fig. 9 B; First and second branch's pit shaft is positioned at phase the same side of main hole 3a; Third and fourth branch's pit shaft is positioned at the other side of main hole 3a, and first branch's pit shaft is positioned at the top of main hole 3a, and second branch's pit shaft is positioned at 1/4 position apart from its top of main hole 3a; The 3rd branch's pit shaft is positioned at 1/2 position apart from its top of main hole 3a, and the 4th branch's pit shaft is positioned at 3/4 position apart from its top of main hole 3a.Shown in Fig. 9 C; First and third branch's pit shaft is positioned at phase the same side of main hole 3a; The second, four branch's pit shafts are positioned at the other side of main hole 3a, and first branch's pit shaft is positioned at the top of main hole 3a, and second branch's pit shaft is positioned at 1/4 position apart from its top of main hole 3a; The 3rd branch's pit shaft is positioned at 1/2 position apart from its top of main hole 3a, and the 4th branch's pit shaft is positioned at 3/4 position apart from its top of main hole 3a.
Wherein, what Fig. 6 A to Fig. 9 C was shown only is the example of multilateral well, is not limited in several kinds of situation in this.
Furthermore, the diameter of said main hole 3a and the pit shaft 3c of branch can obtain according to similarity criterion, and particularly, for example, the diameter of main hole 3a and the pit shaft 3c of branch is 6 millimeters, and the aperture of perforation 4 can be 3 millimeters.The length of main hole 3a is 44 centimetres, and the length of the pit shaft 3c of branch is 13 centimetres.
According to an embodiment of the invention; Cooperation is referring to Fig. 2 and shown in Figure 3; Said experimental facilities also comprises seepage flow plate 5; Said seepage flow plate 5 flatly is connected in the said casing 1, and said water injection well 2 flatly is positioned at the below of said seepage flow plate 5, and said horizontal production well 3 is positioned at the top of said seepage flow plate 5.Experimental facilities in the present embodiment can carry out heat-bodied oil and hide simulation; Water injection well 2 is positioned at the below of seepage flow plate 5, so can carry out the bottom water reservoir simulated experiment, observes end water ridge and advances phenomenon; The water ridge living position of setting out on earth; Thereby find corresponding method to prevent the generation that end water ridge advances, increase the production time, improve output.
When operated by rotary motion, make the cross section of casing 1 be square, promptly its length and width equate, the height of casing 1 is less than its length.For example, said casing 1 is of a size of, the wide * height=41cm*41cm*35cm of long *; The wall thickness of said casing is 1cm, and lid thickness is 1.5cm.Particularly, said seepage flow plate 5 is positioned at casing 1 intermediate altitude position on the lower side, and for example seepage flow plate 5 is positioned at the position apart from 8 centimetres of casing 1 bottom surfaces.
The experimental facilities of present embodiment is inserted heat-bodied oil with porous media-fine sand and is hidden in the three-dimensional visualization analogue means in experimentation, carries out compacting, with distilled water simulation end water, for the ease of the observation of experiment, can in distilled water, mix black ink.Simulated Water horizontal well exploitation bottom water reservoir process is found in recovery process, to occur end water ridge at last and is advanced phenomenon then.Living position was with physical simulation experiment was different in the past but end water ridge is seted out, and the result that obtains of physical simulation experiment at the horizontal well middle part end water ridge took place to advance in the past, and the result who obtains in this experiment to be horizontal well root generation end water ridge advance.Hence one can see that, and during the horizontal wells bottom water reservoir, the position that generation end water ridge advances not necessarily at the horizontal well middle part, might occur in the horizontal well heel.Therefore, in actual production, can not only consider the horizontal well middle part when water ridge advances at the end in prevention, also whether considered advances phenomenon at heel generation ridge.
According to an embodiment of the invention, cooperate referring to Fig. 4 and shown in Figure 5, said water injection well 2 is vertical setting, and it is positioned at the marginal portion of said casing 1.Horizontal production well 3 can be positioned at the position about 1/2 height of casing 1.
In visual physical simulation experiment in the past; Have plenty of and carry out three-dimensional simulation; What have only is that simulation is two-dimentional, hides for the also just more single simulation heat-bodied oil of three-dimensional, and can not some thin oil reservoirs be simulated; This just makes that physical simulation experiment has had specific aim, has just limited the scope of visual Simulation to a certain extent.And the experimental facilities in the present embodiment can be realized the simulation of flooding pattern; It has changed the position of water injection well 2; Water injection well 2 is vertically placed, can be simulated well Different Boundary water flooding recovery well pattern, and; This experimental facilities can be simulated thin oil reservoir, thereby has solved the problem of spatial simulation.
When operated by rotary motion, make the cross section of casing 1 be square, promptly its length and width equate, the height of casing 1 is less than its 1/2 length.For example, said casing 1 is of a size of, the wide * height=78cm*78cm*10cm of long *, and its each wall thickness is 1cm, the thickness of top cover 1a is 1.5cm.
The present invention hides heat-bodied oil and approach oil reservoir and separately simulates, thereby more pointed.
Embodiment two
The embodiment of the invention has also proposed a kind of formation method of visual experimental apparatus, and it comprises step:
Form casing 1; Water injection well 2 and horizontal production well 3; Said horizontal production well 3 comprises main hole 3a, and the tail end of said main hole 3a is connected with connecting cylinder 3b, and the side of said main hole 3a is provided with at least one pit shaft 3c of branch; The said pit shaft 3c of branch is positioned on the horizontal plane of said main hole 3a, all is provided with a plurality of perforations 4 equably on said main hole 3a and the pit shaft 3c of branch;
Water injection well 2 and horizontal production well 3 are put into casing 1;
Porous media inserted in the said casing 1 carry out compacting, water injection well 2 is covered by among the porous media with horizontal production well 3;
Adopt to inject the method for water porous media carried out water saturation, and then the mode that adopts oily expelling water that porous media is carried out oil is saturated, to simulate the profit distribution in the prime stratum fully, so form visual experimental apparatus.
Wherein, inject water or inject oil, can from water injection well 2, inject, also can directly from casing 1, inject toward porous media.
Other structure of this embodiment is identical with above-mentioned embodiment with beneficial effect, no longer specifies at this.
The above is merely several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the embodiment of the invention and do not break away from the spirit and scope of the present invention according to application documents are disclosed.

Claims (9)

1. a physical analogy visual experimental apparatus is characterized in that, said experimental facilities comprises:
Casing, it is cube, and the top of said casing has top cover, is filled with porous media in the said casing;
Water injection well, one of which end are located in the said casing, and the other end stretches out said casing and exposes;
Horizontal production well, it is horizontally disposed with, and said horizontal production well comprises main hole; The tail end of said main hole is connected with connecting cylinder; The side of said main hole is provided with at least one branch's pit shaft, and said branch pit shaft is positioned on the horizontal plane of said main hole, and said main hole and branch's pit shaft all are positioned at the inside of said casing; And connecting cylinder is positioned at the outside of said casing, all is provided with a plurality of perforations on said main hole and the branch's pit shaft equably.
2. physical analogy visual experimental apparatus according to claim 1 is characterized in that, the external packets of said main hole and branch's pit shaft is covered with sand control screens; Said perforation is an interval square crossing formula perforation.
3. physical analogy visual experimental apparatus according to claim 1 is characterized in that said water injection well is vertical setting, and it is positioned at the marginal portion of said casing.
4. physical analogy visual experimental apparatus according to claim 1; It is characterized in that; Said experimental facilities also comprises the seepage flow plate; Be connected in the said casing, said water injection well flatly is positioned at the below of said seepage flow plate said seepage flow plate level, and said horizontal production well is positioned at the top of said seepage flow plate.
5. according to any described physical analogy visual experimental apparatus of claim 1 to 4, it is characterized in that said main hole and branch's pit shaft are steel pipe and process, said main hole is welded to each other with the branch pit shaft and is connected.
6. physical analogy visual experimental apparatus according to claim 5 is characterized in that, the angle between said branch pit shaft and the said main hole is that said main hole is identical with the diameter of branch's pit shaft between 0 °-90 °.
7. physical analogy visual experimental apparatus according to claim 6 is characterized in that, the angle between said branch pit shaft and the said main hole is 30 °, 45 ° or 60 °.
8. physical analogy visual experimental apparatus according to claim 1 is characterized in that, said porous media is a fine sand, perhaps is the mixture of montmorillonite powder and sand, and the mixed proportion of montmorillonite powder and sand is 1: 4.
9. the formation method of a visual experimental apparatus is characterized in that, said method comprises step:
Form casing; Water injection well and horizontal production well; Said horizontal production well comprises main hole, and the tail end of said main hole is connected with connecting cylinder, and the side of said main hole is provided with at least one branch's pit shaft; Said branch pit shaft is positioned on the horizontal plane of said main hole, all is provided with a plurality of perforations on said main hole and the branch's pit shaft equably;
Water injection well and horizontal production well are put into casing;
Porous media inserted carry out compacting in the said casing, water injection well and horizontal production well are covered by among the porous media;
Adopt to inject the method for water water saturation carried out on the porous media stratum, and then the mode that adopts oily expelling water that porous media is carried out oil is saturated, to simulate the profit distribution in the prime stratum fully, so form visual experimental apparatus.
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