CN102108860A - Visualized fracture network oil displacement model and manufacturing method thereof - Google Patents
Visualized fracture network oil displacement model and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a visualized fracture network oil displacement model and a manufacturing method thereof. The structure of the model consists of a transparent template, a gimbal and a base, wherein the transparent template consists of an edge covering frame, a main template, a cover plate and a simulation well, wherein the main template is fracture network grooves formed by jointing matrix rock blocks; sand residue is filled in the fracture network grooves; a sealing pad is embedded between the cover plate and the main template; the edge covering frame covers the circumference of the main template and the cover plate; simulation wells represented by common valves are arranged on the upper and lower edges of the edge covering frame and on the surface of the cover plate, and the simulation wells pass through the upper and lower edges of the edge covering frame and the surface of the cover plate through threaded pipe connectors to be connected with the fracture network grooves; and the gimbal consists of a U-shaped frame, an upright post, left and right rotating components and front and back rotating components, the top end of the upright post is connected with the middle of the U-shaped frame through the left and right rotating components, and the upper end of the U-shaped frame is connected with the middle of the two sides of the edge covering frame through the front and back rotating components. The method provided by the invention can solve the problem that visualized physical experiments in a fracture network and injection well network mode cannot be performed. The method has the characteristics of simplicity, high maneuverability, effectiveness, practicality and the like, and therefore has high promotion and use value.
Description
Technical field
The invention belongs to the reservoir physics research field, relate to the experimental model preparation method under visual fracture network of a kind of large scale and the flooding pattern pattern, promptly according to actual fracture development situation and flooding pattern type in the oil reservoir, fracture network form in the contrived experiment simulation model and flooding pattern pattern can reflect the influence to oil field development of fracture network distribution in the actual oil reservoir and non-homogeneity and flooding pattern realistically.
Background technology
Field geology and core analysis discover, in fractured reservoir, often grow very much in the crack, interconnection and network-like distribution mutually between crack and the crack, and its non-homogeneity is stronger, the fluid flow characteristics complexity.The crack core or the visual thin slice model of microcosmic of main at present employing small scale carry out Related Experimental Study, are difficult to the influence to oil reservoir development of network-like fractue spacing of reflection and flooding pattern.For this reason, the present invention proposes a kind of visual fracture network displacement of reservoir oil model and preparation method thereof, this method is according to actual fracture development situation and flooding pattern type in the oil reservoir, fracture network form in the contrived experiment simulation model and flooding pattern pattern, can reflect the influence of fracture network distribution in the actual oil reservoir and non-homogeneity and flooding pattern realistically to oil field development, can be used for studying the oil-water movement mode under the fracture network and flooding pattern pattern in the fractured reservoir, motion process, oil displacement efficiency, the recovery ratio of different phase, feature such as moisture content and Remaining Oil Distribution, thus guidance provided for improving such reservoir development effect.
Summary of the invention
Traditional small scale crack core model and the visual thin slice model of microcosmic, be difficult to the influence of network-like fractue spacing of reflection and flooding pattern pattern to such oil reservoir development, at the problems referred to above, the present invention proposes a kind of visual fracture network displacement of reservoir oil model and preparation method thereof.
Visual fracture network displacement of reservoir oil model of the present invention, its structure is by transparent template, gimbals and base are formed, wherein transparent template is by the bound edge framework, master module, simulation matrix sillar, cover plate and simulation well are formed, be bonded with the simulation matrix sillar of band fracture network groove on the master module, be filled with sand formation cuttings in the fracture network groove, the soffit of cover plate bonds together by the upper surface of silica gel with simulation matrix sillar, the periphery of simulation matrix sillar is provided with sealing mat, the limit portion of cover plate and master module bonds together by silica gel and sealing mat, the bound edge framework is with master module, the periphery of sealing mat and cover plate is encapsulated in together, the simulation well of representing with common valve is arranged on the both sides up and down of bound edge framework and the surface of cover plate, and simulation well passes bound edge framework and cover plate by screwed pipe joint surface is connected with the fracture network groove;
Gimbals are made up of U-shaped frame, column, left-right rotation assembly and front and back runner assembly, and the column top is connected by left-right rotation assembly and U-shaped frame bottom are middle, and U-shaped frame upper end is by being connected in the middle of front and back runner assembly and the bound edge both sides;
The front and back runner assembly is made up of the positioning spiro pit on front and back rotational fixation positioning disk, rotating shaft, front and back rotational positioning bolt and the bound edge framework, front and back rotational fixation positioning disk is arranged on the top of U-shaped frame, the centre has axis hole, limit portion has screwed hole, the corresponding different rotational angle of different screwed holes, front and back rotational positioning bolt is passed from the respective screw hole on the rotational fixation positioning disk of front and back, rotate the bound edge framework, the rotational positioning bolt enters the positioning spiro pit on the bound edge framework again before and after making, thereby transparent template is fixed on the U-shaped frame;
The left-right rotation assembly is by left-right rotation stationary positioned dish, left-right rotation is moved positioning disk, pivot pin and left-right rotation positioning bolt are formed, two left-right rotation stationary positioned dishes are arranged on the top that section is the square column, the centre has axis hole, limit portion has screwed hole, be provided with the left-right rotation positioning bolt in the screwed hole, in the middle of the moving positioning disk of left-right rotation axis hole is arranged, periphery has locating hole, the moving positioning disk of left-right rotation is arranged between the left-right rotation stationary positioned dish, the moving positioning disk of left-right rotation stationary positioned dish and left-right rotation links together by pivot pin, the end of the left-right rotation positioning bolt of left-right rotation stationary positioned web portion is corresponding with the locating hole of the moving location of left-right rotation web portion, and the middle part of the both sides of the moving positioning disk of left-right rotation and U-shaped frame bottom is fixed together;
The bottom of base is provided with universal wheel, and the top and the column lower end of base are fixed together.
Visual fracture network displacement of reservoir oil modelling making step is as follows:
(1) according to relevant Research of Reservoir Description achievement, based on the theory of similarity, the position simulation drawing of each well is standby in the interconnection form by computer design fracture network and fracture aperture feature and the flooding pattern;
(2) get core, field appear sampling or artificial preparation means by mining site, be ready to the required simulation matrix sillar materials of modelling;
(3) with simulation drawing data input draught machine, master module is fixed on the draught machine, draught machine goes out fracture network form identical with simulation drawing and aperture feature according to the simulation drawing data at the master module surface rendering, adopt the matrix sillar materials of preparing in the step (2), carry out assembly unit and cement in the surface of master module according to fracture network form on the master module and aperture feature, the last simulation matrix sillar that on master module, forms band fracture network groove with silica gel;
(4) quartz sand or the reservoir landwaste of requirement of experiment satisfied in selection, is filled in the fracture network groove in the simulation matrix sillar, in order to the crack filling state in the simulation reservoir;
(5) silica gel is cleaned out and coated to the upper surface that will have the simulation matrix sillar of fracture network groove, periphery at simulation matrix sillar is provided with sealing mat, bond together with cover plate then, treat to use after silica gel solidifies the grooved metal frame that master module, sealing mat and cover plate are carried out bound edge and reinforce standby;
(6) according to the position of each well in the simulation drawing, both sides up and down and lid surface corresponding position at transparent template drill through simulation well, the simulation well bottom is linked up with simulation matrix sillar crack, valve in the adapter of simulation well port of export mounting strap, before the mounted valve with the well head of each simulation well up, then model is carried out leak test, guarantee the sealing of model and the connectedness of simulation matrix sillar fracture network;
(7) transparent template is assembled on gimbals and the base, by the left-right rotation of left-right rotation assembly control transparent template and the location steadiness of left and right sides positioning bolt, by the front and back rotation of front and back runner assembly control transparent template and the location steadiness of front and back positioning bolt, the rotational angle by regulating left-right rotation assembly and front and back runner assembly is in order to actual inclination angle of simulating oil deposit and different displacement directions.
Advantage of the present invention and effect are:
(1) modelling is based on the theory of similarity, in conjunction with fractured reservoir water drive oil seepage flow feature affects parameter, designs, makes according to the principle of geometric similarity and kinematic similitude;
(2) compare with conventional small scale model, this model volume is big, and metering is easy, and experimentation is clear, and error is little;
(3) model can be carried out the physical simulation experiment research contents of different well patterns, different displacement mode and different displacement direction and angle, and intuitive is strong, easy operating.
(4) method of the present invention's proposition, according to actual fracture development situation and the flooding pattern type in the oil reservoir, based on the principle of similitude, fracture network form in the contrived experiment simulation model and flooding pattern pattern, can reflect the influence of fracture network distribution in the actual oil reservoir and non-homogeneity and flooding pattern realistically, can be used for studying the features such as recovery ratio, moisture content and Remaining Oil Distribution of oil-water movement mode under the fractured reservoir flooding pattern pattern, motion process, oil displacement efficiency, different phase oil field development.
(5) method of the present invention's proposition can be filled up the blank of " can't carry out visual Physical Experiment under fracture network and the flooding pattern pattern ", and have characteristics such as method is simple, workable, effective practicality, thereby have good value for applications.
Description of drawings:
Fig. 1 is the main TV structure schematic diagram of model;
Fig. 2 is the left TV structure schematic diagram of model;
Fig. 3 is the structural representation of transparent template;
Fig. 4 is that the A-A of Fig. 3 is to the section structure schematic diagram.
Description of reference numerals: base 1, column 2, left-right rotation stationary positioned dish 3, left-right rotation positioning bolt 4, U-shaped support 5, front and back rotational fixation positioning disk 6, rotating shaft 7, front and back rotational positioning bolt 8, front and back rotational positioning screwed hole 9, bound edge framework 10, fracture network groove 11, simulation well 12, the moving positioning disk 13 of left-right rotation, master module 14, silica gel 15, sand formation cuttings 16, universal wheel 17, pivot pin 18, cover plate 19, simulation matrix sillar 20, sealing mat 21.
The specific embodiment:
With reference to accompanying drawing visual fracture network displacement of reservoir oil model of the present invention is done concrete detailed description,
Shown in accompanying drawing 1-3, visual fracture network displacement of reservoir oil model of the present invention, its structure is by transparent template, gimbals and base are formed, wherein transparent template is by bound edge framework 10, master module 14, simulation matrix sillar 20, cover plate 19 and simulation well 12 are formed, be bonded with the simulation matrix sillar 20 of band fracture network groove 11 on the master module 14, be filled with sand formation cuttings 16 in the fracture network groove 11, the soffit of cover plate 19 bonds together by the upper surface of silica gel 15 with simulation matrix sillar 20, the periphery of simulation matrix sillar 20 is provided with sealing mat 21, the limit portion of cover plate 19 and master module 10 bonds together by silica gel 15 and sealing mat 21, bound edge framework 10 is with master module 14, the periphery of sealing mat 21 and cover plate 19 is encapsulated in together, the simulation well of representing with common valve 12 is arranged on the both sides up and down of bound edge framework 10 and the surface of cover plate 19, and simulation well 12 is connected with fracture network groove 11 by the surface that screwed pipe joint passes bound edge framework 10 and cover plate 19;
Gimbals are made up of U-shaped frame 5, column 2, left-right rotation assembly and front and back runner assembly, and column 2 tops are connected by left-right rotation assembly and U-shaped frame 5 bottoms are middle, and U-shaped frame 5 upper ends are by being connected in the middle of front and back runner assembly and the bound edge both sides;
The front and back runner assembly is by front and back rotational fixation positioning disk 6, rotating shaft 7, positioning spiro pit 9 on front and back rotational positioning bolt 8 and the bound edge framework 10 is formed, front and back rotational fixation positioning disk 6 is arranged on the top of U-shaped frame, the centre has axis hole, limit portion has screwed hole, the corresponding different rotational angle of different screwed holes, front and back rotational positioning bolt 8 is passed from the respective screw hole on the front and back rotational fixation positioning disk 6, rotate bound edge framework 10, the positioning spiro pit 9 that rotational positioning bolt 8 enters on the bound edge framework 10 again before and after making, thus transparent template is fixed on the U-shaped frame 5;
The left-right rotation assembly is by left-right rotation stationary positioned dish 3, left-right rotation is moved positioning disk 13, pivot pin 18 and left-right rotation positioning bolt 4 are formed, two left-right rotation stationary positioned dishes 3 are arranged on the top that section is a square column 2, axis hole is opened in the centre, limit portion has screwed hole, be provided with left-right rotation positioning bolt 4 in the screwed hole, open axis hole in the middle of the moving positioning disk 13 of left-right rotation, periphery is driven locating hole, the moving positioning disk 13 of left-right rotation is arranged between the left-right rotation stationary positioned dish 3, the moving positioning disk of left-right rotation stationary positioned dish 3 and left-right rotation 13 links together by pivot pin, the end of the left-right rotation positioning bolt 4 of left-right rotation stationary positioned dish 3 limit portions is corresponding with the locating hole of the moving positioning disk 13 limit portions of left-right rotation, and the both sides of the moving positioning disk 13 of left-right rotation and middle part, U-shaped frame 5 bottoms are fixed together; The bottom of base 1 is provided with universal wheel 17, and the top of base 1 and column 2 lower ends are fixed together.
Embodiment
The preparation method of visual fracture network displacement of reservoir oil model of the present invention, it is as follows to design and produce step:
(1) according to relevant Research of Reservoir Description achievement, based on the theory of similarity, the position simulation drawing of each well is standby in the interconnection form by computer design fracture network and fracture aperture feature and the flooding pattern;
(2) get core, field appear sampling or artificial preparation means by mining site, be ready to the required simulation matrix sillar materials of modelling;
(3) with simulation drawing data input draught machine, master module is fixed on the draught machine, draught machine goes out fracture network form identical with simulation drawing and aperture feature according to the simulation drawing data at the master module surface rendering, adopt the matrix sillar materials of preparing in the step (2), carry out assembly unit and cement in the surface of master module according to fracture network form on the master module and aperture feature, the last simulation matrix sillar that on master module, forms band fracture network groove with silica gel;
(4) quartz sand or the reservoir landwaste of requirement of experiment satisfied in selection, is filled in the fracture network groove in the simulation matrix sillar, in order to the crack filling state in the simulation reservoir;
(5) silica gel is cleaned out and coated to the upper surface that will have the simulation matrix sillar of fracture network groove, periphery at simulation matrix sillar is provided with sealing mat, bond together with cover plate then, treat to use after silica gel solidifies the grooved metal frame that master module, sealing mat and cover plate are carried out bound edge and reinforce standby;
(6) according to the position of each well in the simulation drawing, both sides up and down and lid surface corresponding position at transparent template drill through simulation well, the simulation well bottom is linked up with simulation matrix sillar crack, valve in the adapter of simulation well port of export mounting strap, before the mounted valve with the well head of each simulation well up, then model is carried out leak test, guarantee the sealing of model and the connectedness of simulation matrix sillar fracture network;
(7) transparent template is assembled on gimbals and the base, by the left-right rotation of left-right rotation assembly control transparent template and the location steadiness of left and right sides positioning bolt, by the front and back rotation of front and back runner assembly control transparent template and the location steadiness of front and back positioning bolt, the rotational angle by regulating left-right rotation assembly and front and back runner assembly is in order to actual inclination angle of simulating oil deposit and different displacement directions.
Claims (2)
1. visual fracture network displacement of reservoir oil model, it is characterized in that, comprise transparent template, gimbals and base, wherein transparent template is by the bound edge framework, master module, simulation matrix sillar, cover plate and simulation well are formed, be bonded with the simulation matrix sillar of band fracture network groove on the master module, be filled with sand formation cuttings in the fracture network groove, the soffit of cover plate bonds together by the upper surface of silica gel with simulation matrix sillar, the periphery of simulation matrix sillar is provided with sealing mat, the limit portion of cover plate and master module bonds together by silica gel and sealing mat, the bound edge framework is with master module, the periphery of sealing mat and cover plate is encapsulated in together, the simulation well of representing with common valve is arranged on the both sides up and down of bound edge framework and the surface of cover plate, and simulation well passes bound edge framework and cover plate by screwed pipe joint surface is connected with the fracture network groove;
Gimbals are made up of U-shaped frame, column, left-right rotation assembly and front and back runner assembly, and the column top is connected by left-right rotation assembly and U-shaped frame bottom are middle, and U-shaped frame upper end is by being connected in the middle of front and back runner assembly and the bound edge both sides;
The front and back runner assembly is made up of the positioning spiro pit on front and back rotational fixation positioning disk, rotating shaft, front and back rotational positioning bolt and the bound edge framework, front and back rotational fixation positioning disk is arranged on the top of U-shaped frame, the centre has axis hole, limit portion has screwed hole, the corresponding different rotational angle of different screwed holes, front and back rotational positioning bolt is passed from the respective screw hole on the rotational fixation positioning disk of front and back, rotate the bound edge framework, the rotational positioning bolt enters the positioning spiro pit on the bound edge framework again before and after making, thereby transparent template is fixed on the U-shaped frame;
The left-right rotation assembly is by left-right rotation stationary positioned dish, left-right rotation is moved positioning disk, pivot pin and left-right rotation positioning bolt are formed, two left-right rotation stationary positioned dishes are arranged on the top that section is the square column, the centre has axis hole, limit portion has screwed hole, be provided with the left-right rotation positioning bolt in the screwed hole, in the middle of the moving positioning disk of left-right rotation axis hole is arranged, periphery has locating hole, the moving positioning disk of left-right rotation is arranged between the left-right rotation stationary positioned dish, the moving positioning disk of left-right rotation stationary positioned dish and left-right rotation links together by pivot pin, the end of the left-right rotation positioning bolt of left-right rotation stationary positioned web portion is corresponding with the locating hole of the moving location of left-right rotation web portion, and the middle part of the both sides of the moving positioning disk of left-right rotation and U-shaped frame bottom is fixed together;
The bottom of base is provided with universal wheel, and the top and the column lower end of base are fixed together.
2. the preparation method of visual fracture network displacement of reservoir oil model is characterized in that, it is as follows to design and produce step:
(1) according to relevant Research of Reservoir Description achievement, based on the theory of similarity, the position simulation drawing of each well is standby in the interconnection form by computer design fracture network and fracture aperture feature and the flooding pattern;
(2) get core, field appear sampling or artificial preparation means by mining site, be ready to the required simulation matrix sillar materials of modelling;
(3) with simulation drawing data input draught machine, master module is fixed on the draught machine, draught machine goes out fracture network form identical with simulation drawing and aperture feature according to the simulation drawing data at the master module surface rendering, adopt the matrix sillar materials of preparing in the step (2), carry out assembly unit and cement in the surface of master module according to fracture network form on the master module and aperture feature, the last simulation matrix sillar that on master module, forms band fracture network groove with silica gel;
(4) quartz sand or the reservoir landwaste of requirement of experiment satisfied in selection, is filled in the fracture network groove in the simulation matrix sillar, in order to the crack filling state in the simulation reservoir;
(5) silica gel is cleaned out and coated to the upper surface that will have the simulation matrix sillar of fracture network groove, periphery at simulation matrix sillar is provided with sealing mat, bond together with cover plate then, treat to use after silica gel solidifies the grooved metal frame that master module, sealing mat and cover plate are carried out bound edge and reinforce standby;
(6) according to the position of each well in the simulation drawing, both sides up and down and lid surface corresponding position at transparent template drill through simulation well, the simulation well bottom is linked up with simulation matrix sillar crack, valve in the adapter of simulation well port of export mounting strap, before the mounted valve with the well head of each simulation well up, then model is carried out leak test, guarantee the sealing of model and the connectedness of simulation matrix sillar fracture network;
(7) transparent template is assembled on gimbals and the base, by the left-right rotation of left-right rotation assembly control transparent template and the location steadiness of left and right sides positioning bolt, by the front and back rotation of front and back runner assembly control transparent template and the location steadiness of front and back positioning bolt, the rotational angle by regulating left-right rotation assembly and front and back runner assembly is in order to actual inclination angle of simulating oil deposit and different displacement directions.
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