Disclosure of Invention
In view of this, the invention provides an experimental apparatus for simulating the side water driven oil recovery of a collapsed storage reservoir.
The invention provides an experimental device for simulating side water driven oil extraction of a collapse accumulation reservoir body, which comprises an inner barrel, an outer barrel, a cover body, a side water driven power system, a fluid output metering system and a data acquisition system, wherein the outer barrel is vertically arranged in the inner barrel, the inner barrel is coaxially fixed in the outer barrel, the upper end of the outer barrel is flush with the upper end of the outer barrel, a cavity is formed between the outer barrel and the cover body, the cover body is of a disc structure matched with the outer barrel, the cover body is detachably arranged at the upper end of the outer barrel so as to open or cover the upper end of the outer barrel, a first through hole assembly is arranged on the outer barrel, a plurality of groups of first through hole assemblies are respectively distributed along the circumference of the outer barrel at intervals and can be communicated or sealed with the inside of the outer barrel, a plurality of groups of second through hole assemblies are arranged on the inner barrel at intervals and can be communicated or sealed with the inside of the inner barrel, at least one group of first through hole assemblies and the second through hole assemblies are detachably arranged at the upper end of the cover body, in addition, a plurality of groups of first through hole assemblies are respectively communicated with the fluid output metering system and the fluid output metering system, a plurality of groups of through holes are respectively arranged at the side water metering system and are connected with the inner side water output system, the fluid metering system is connected with the side water output system, the side water metering system is connected with the fluid output system, and the side water metering system is respectively.
Further, an iron wire net is arranged in the inner barrel, and the iron wire net is fixedly connected with the inner wall of the inner barrel.
Further, the first through hole assembly includes a plurality of first through holes, and is a plurality of first through holes are respectively followed the even interval distribution of axial of outer bucket, the second through hole assembly includes a plurality of second through holes, and a plurality of the second through holes are respectively followed the axial interval distribution of interior bucket, wherein a set of a plurality of first through hole assembly respectively with the second through hole intercommunication that the second through hole assembly corresponds to form a plurality of detection sub-channel, data acquisition system respectively with a plurality of detection sub-channel connection, in addition the second through hole with the equal detachable of first through hole department installs the sealing plug.
Further, the data acquisition system comprises a data processing terminal and a pressure acquisition unit, wherein the pressure acquisition unit is connected with a plurality of detection sub-channels and is used for acquiring the pressure in the inner barrel, and the data processing terminal is connected with the pressure acquisition unit and the fluid output metering system.
Further, the pressure acquisition unit includes circuit board, display screen and with a plurality of the pressure measurement pipe that detects the subchannel and correspond the setting, the one end of pressure measurement pipe with correspond detect the subchannel and be connected, its other end with the circuit board electricity is connected, the display screen with the circuit board with data processing terminal electricity is connected, be equipped with on the pressure measurement pipe rather than inside intercommunication air inlet, air inlet department detachable installs the sealing member, the sealing member is used for closing and opening the air inlet.
Further, the fluid output metering system comprises a first peristaltic pump, a first liquid storage container and a metering unit, wherein the first peristaltic pump is communicated with the third through hole through a second hose, the first liquid storage container is arranged on the metering unit, the metering unit is used for weighing the first liquid storage container, the discharge end of the second hose stretches into the first liquid storage container, the metering unit is electrically connected with the data processing terminal, and a first valve is arranged at one end, close to the second through hole, of the second hose.
Further, the side water driving power system comprises a third hose, a second liquid storage container and a second peristaltic pump, one end of the third hose is connected with any one of the first through holes on the corresponding first through hole component in a sustainable connection mode, the other end of the third hose stretches into the second liquid outlet container, the second peristaltic pump is arranged on the third hose, and a second valve is arranged at one end, close to the corresponding first through hole, of the third hose.
The technical scheme provided by the invention has the beneficial effects that: the experimental device for simulating the side water driven oil extraction of the collapse and accumulation reservoir body has the following advantages:
1. The experimental device is provided with an inner barrel space and an outer barrel space which are mutually independent, wherein the inner barrel space is used for filling a medium simulation reservoir, the outer barrel space is an annular space for storing side water, and the purpose of simulating the side water oil reservoir is achieved through a unique structure;
2. According to the experimental device, four different side water injection ports can be selected on the outer barrel, so that the purpose of injecting side water into the outer barrel from different positions is achieved, and through selectively opening part of hole sites on the inner barrel, the side water can be selectively led into a reservoir from different height positions, and the influence degree of the side water injection position on the recovery ratio can be studied;
3. the experimental device can set different side water driving speeds to study the influence and the influence degree of the side water driving speed on the recovery ratio.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
In the invention, the simulation required by the experiment is crude oil, the surface water is selected to simulate the formation water, and the experiment is carried out under the conditions of normal temperature and normal pressure.
Referring to fig. 1-4, an experimental apparatus for simulating side water driven oil recovery of a collapse accumulation reservoir is provided in an embodiment of the present invention, which comprises an inner barrel 10, an outer barrel 20, a cover 30, a side water driven power system, a fluid output metering system and a data acquisition system, wherein the outer barrel 20 is vertically disposed, a base 21 is disposed at the lower end of the outer barrel 20, the inner barrel 10 is coaxially fixed in the outer barrel 20, the upper end of the inner barrel is flush with the upper end of the outer barrel 20, a cavity 22 is formed between the inner barrel and the outer barrel 20, the cover 30 is a disk structure matched with the outer barrel 20, and is detachably mounted at the upper end of the outer barrel 20 to open or cover the upper end of the outer barrel 20, a plurality of groups of first through hole assemblies are disposed on the outer barrel 20 at intervals along the circumferential direction of the outer barrel 20, and can be communicated or sealed with the interior of the outer barrel 20, the inner barrel 10 is provided with a plurality of groups of second through hole assemblies which are arranged in one-to-one correspondence with the first through hole assemblies, the plurality of groups of second through hole assemblies are distributed at intervals along the circumferential direction of the inner barrel 10 and can be communicated or sealed with the inner part of the inner barrel 10, at least one group of first through hole assemblies are communicated with the corresponding second through hole assemblies to form a detection channel, the other groups of first through hole assemblies are respectively provided with a side water driving power system which is used for conveying side water into the outer barrel 20, the middle part of the cover body 30 is provided with a third through hole 31 which penetrates through the cover body from top to bottom, the fluid output metering system is connected with the third through hole 31 and is used for driving fluid output and metering and storing the output fluid, the data acquisition system is respectively connected with the detection channel and the fluid output metering system, to collect the pressure value inside the inner tub 10 and the weight of the fluid.
In the present invention, the inner tub 10 and the outer tub 20 are both made of organic glass material, the inner tub 10 is used for filling a medium to simulate a collapsed stacked reservoir, and the plurality of second through-hole assemblies provided on the inner tub 10 form one screen with the inner tub 10, the screen serving to support the boundary of the collapsed stacked reservoir. The cavity 22 functions to store side water. The outer tub 20 and the inner tub 10 are respectively provided with 5 groups of first through hole assemblies and second through hole assemblies, wherein one group of first through hole assemblies and the second through hole assemblies form detection channels, and the remaining 4 first through hole assemblies are used as side water input channels, and correspondingly, 4 side water driving power systems are also provided. The cover 30 is directly connected with the outer tub 20 and fixed by mounting and dismounting bolts, and in order to improve the tightness when the cover 30 is connected with the outer tub 20, a first sealing ring and a second sealing ring are coaxially arranged at the lower end of the cover 30, wherein the first sealing ring is used for sealing the outer tub 20, and the second sealing ring is used for sealing the inner tub 10. In the test process, the position where the second through hole assembly is communicated with the interior of the inner barrel 10 is selected, the side water is input into the inner barrel 10 through four groups of first through hole assemblies and corresponding side water driving power systems, the position where the side water second through hole assembly is communicated with the interior of the inner barrel 10 and the position where the side water second through hole assembly is communicated with the interior of the inner barrel 10 enter into the collapse accumulation reservoir, then oil in the collapse accumulation reservoir is ejected from the third through holes 31 and flows into the fluid output metering system, the fluid output metering system weighs the oil, weight information is sent to the data acquisition system, the data acquisition system records and stores the weight information, and meanwhile, the data acquisition system acquires the pressure in the inner barrel 10 at all times so as to record and store the pressure condition in the test process.
The base 21 can improve the supporting force of the outer barrel 20, the height is 240mm, the width is 630mm, the inner diameter of the outer barrel 20 is 600mm, the outer diameter is 630mm, the height is 490mm, the wall thickness is 15mm, the inner diameter of the inner barrel 10 is 280mm, the outer diameter is 300mm, the height is 490mm, the wall thickness is 10mm, the diameters of the first through hole 24 and the second through hole 11 are 5mm, the diameter of the cover body 30 is 680mm, the thickness of the outer edge is 10mm, the length is 25mm, the diameter of the sealing ring is 620mm, the thickness is 3mm, the diameter of the second sealing ring is 290mm, and the thickness is 3mm.
In the above embodiment, the first through hole assembly includes a plurality of first through holes 24, the plurality of first through holes 24 are uniformly spaced along the axial direction of the outer tub 20, the second through hole assembly includes a plurality of second through holes 11, and the plurality of second through holes 11 are spaced along the axial direction of the inner tub 10, wherein the plurality of first through holes 24 of a group of first through hole assemblies are respectively communicated with the corresponding second through holes of the second through hole assemblies to form a plurality of detection sub-channels, the data acquisition system is respectively connected with the plurality of detection sub-channels, and in addition, the sealing plugs 50 are detachably mounted at the positions of the second through holes 11 and the first through holes 24.
In the present invention, the purpose of freely selecting the injection position of the side water and the height position of the side water flowing into the inner tub 10 can be achieved by removing the sealing plugs 50 provided at each of the first through holes 24 or the second through holes 11 according to experimental needs, and the purpose of researching the influence and extent of influence of the side water injection position on the recovery ratio by selectively allowing the side water to enter the reservoir from different height positions can be achieved. Specifically, one first through hole 24 is arbitrarily selected from each group of first through hole assemblies to be communicated with the side water driving power system, the remaining first through holes 24 in the same first through hole assembly are closed by a sealing plug 50, and similarly, one second through hole 11 is arbitrarily selected from each group of second through hole assemblies to be communicated with the interior of the inner barrel 10, and the remaining second through holes 11 in the same second through hole assemblies are closed by the sealing plug 50.
In the above embodiment, the data acquisition system includes a data processing terminal 60 and a pressure acquisition unit, the pressure acquisition unit is connected to a plurality of the detection sub-channels for acquiring the pressure inside the inner tub 10, and the data processing terminal 60 is connected to the pressure acquisition unit and the fluid output metering system.
In the invention, the data processing terminal 60 is a computer, and the computer has the advantages of high signal receiving and processing speed, timely processing, quick response and the like.
In the above embodiment, the pressure collecting unit includes a circuit board 61, a display 62, and a pressure measuring tube 63 corresponding to a plurality of detection sub-channels, each detection sub-channel is provided with a capillary glass tube 64, one end of the capillary glass tube 64 is fixedly connected with the corresponding second through hole 11, the other end of the capillary glass tube 64 passes through and extends out of the corresponding first through hole 24, one end of the capillary glass tube 64 extending out of the first through hole 24 is provided with a first hose not shown in the figure, one end of the pressure measuring tube 63 is connected with a first hose installed at the corresponding detection sub-channel, the other end of the pressure measuring tube 63 is electrically connected with the circuit board 61 and the data processing terminal 60, the pressure measuring tube 63 is provided with an air inlet 65 communicated with the inside of the pressure measuring tube, and a sealing member (not shown in the figure) is detachably installed at the air inlet 65 for closing and opening the air inlet 65.
In the present invention, the capillary glass tube 64 is made of an organic glass material, and serves to spatially connect the inner space of the inner tub 10 with the pressure measuring tube 63, thereby measuring the pressure inside the inner tub 10. The pressure measuring tubes 63 are fixed by fixing pieces (not shown in the figure), the fixing pieces are organic glass plates, the pressure measuring tubes 63 measure the pressure by the compression condition of air columns in the pressure measuring tubes after liquid is injected, the pressure measuring tubes are converted by the circuit board 61 and then displayed on the display screen 62, meanwhile, the collected pressure information is sent to the data processing terminal 60 for recording and storage by a circuit, and the pressure collecting unit has the advantages of high measuring speed, accurate measuring results and the like. The present invention is not limited to the structure of the sealing member, and any structure capable of sealing the air inlet 65 in the prior art may be used as a specific embodiment of the sealing member in the present invention, such as a plug, a bolt, etc. Wherein, the total length of the pressure measuring tube 63 is 530mm, the diameter is 5mm, the width of the fixing piece is 880mm, and the length is 78mm.
In the above embodiment, the inner barrel 10 is provided with the wire netting 12, and the wire netting 12 is fixedly connected with the inner wall of the inner barrel 10, where it should be noted that the wire netting 12 is fully paved on the inner wall of the whole inner barrel 10, and the wire netting 12 enables the side water to uniformly enter the reservoir.
In the above embodiment, the fluid output metering system includes a first peristaltic pump 70, a first liquid storage container 71 and a metering unit 72, where the first peristaltic pump 70 is communicated with the third through hole 31 through a second hose 73, the metering unit 72 is an electronic balance and is horizontally disposed, the first liquid storage container 71 is disposed on the metering unit 72, a discharge end of the second hose 73 extends into the first liquid storage container 71 and into the first liquid storage container 71 by 1-2cm, the metering unit 72 is electrically connected with the data processing terminal 60, and a first valve 74 is disposed at an end of the second hose 73 close to the third through hole 31.
In the present invention, the first peristaltic pump 70 controls the speed of the output fluid (i.e., oil), and the oil displaced by the side water is fed into the first reservoir 71 through the second hose 73 and the first peristaltic pump 70, at this time, the metering unit 72 begins to weigh the oil being extracted and continuously records and stores the weight information in the data processing terminal 60, and at the same time, the first reservoir 71 collects and stores the oil being extracted. Wherein the first valve 74 has a length of 50mm and a diameter of 5mm.
In the above embodiment, the side water driving power system includes a third hose 80, a second liquid storage container 81 and a second peristaltic pump 82, one end of the third hose 80 is continuously connected with any one of the first through holes 24 corresponding to the first through hole assembly, the other end of the third hose extends into the second liquid storage container 81, the second peristaltic pump 82 is disposed on the third hose 80, and a second valve 84 is disposed at one end of the third hose 80 adjacent to the corresponding first through hole 24.
In the present invention, the second liquid storage container 81 is used for storing the side water, and the side water in the corresponding second liquid storage container 81 can be input into the outer tub 20 through the second peristaltic pump 82. Wherein the second peristaltic pump 82 may provide a steady adjustable rim water drive rate for different rim water injection locations such that the rim water obtains sufficient power into the reservoir to jack the oil out of the reservoir.
The working principle of the experimental device is as follows: the sealing plugs 50 on the second through holes 11 positioned at the bottom part of the inner barrel 10 in each group of second through holes 11 are removed, the inner barrel 10 is filled with limestone and broken stone media, the inner barrel 10 and the outer barrel 20 are filled with surface water, the cover body 30 is covered, and the first peristaltic pump 70 and the first hose are respectively connected. According to the experimental conditions, an experimental oil of an amount required for weighing in advance is added to the first liquid storage container 71. And 4 hole sites, close to the bottom of the outer barrel 20, in the four groups of first through hole assemblies are selected as side water injection ports, corresponding third hoses 80, second valves 84 and second peristaltic pumps 82 are respectively connected, and the sealing piece on each pressure measuring pipe 63 is taken down to be communicated with the atmosphere so as to ensure that the pressure in each pressure measuring pipe 63 is the same. The first valve 74 and the second valve 84 are opened, the rotation direction of the propellers of the first peristaltic pump 70 and the second peristaltic pump 82 is adjusted, the pump speeds of the first peristaltic pump 70 and the second peristaltic pump 82 are set, the pump speed of the first peristaltic pump 70 is equal to the sum of the pump speeds of the second peristaltic pump 82, the first peristaltic pump 70 and the second peristaltic pump 82 are simultaneously opened, the first peristaltic pump 70 and the second peristaltic pump 82 are started to rotate positively, and the air in the first hose and the third hose 80 is discharged respectively through water circulation, so that the influence on the data calculation in the later period of the experiment is avoided. After the gas is purged, the first peristaltic pump 70 and the second peristaltic pump 82 are turned off. The first peristaltic pump 70 and the plurality of second peristaltic pumps 82 are started to rotate reversely, oil in the first liquid storage container 71 is input into the inner barrel 10 under the action of the first peristaltic pump 70 and is accumulated at the top of a reservoir, meanwhile, surface water is discharged from the second through hole 11 which is opened at the bottom of the outer barrel 20 under the action of the second peristaltic pump 82, and the first peristaltic pump 70 is closed after the oil amount in the input inner barrel 10 reaches the expected oil amount. By calculating the amount of oil remaining in the first reservoir 71, the original amount of oil stored into the inner tub 10 can be obtained.
The air outlet of the pressure measuring tube 63 is closed, and the whole device is ensured to be in a closed state. The weighed container is replaced on the metering unit 72, the orifice of the third hose 80 is suspended 1-2cm above the container for the produced liquid, and balance data recording software in the data processing terminal 60 is started to communicate with a circuit connected with the pressure measuring tube 63. The first peristaltic pump 70 and the second peristaltic pump 82 are activated to rotate forward, and simultaneously the first valve 74 and the second valve 84 are opened to inject surface water into the outer tub 20, and the reservoir is ejected to flow into the first reservoir 71 through the first hose and the first peristaltic pump 70. During the period, the pressure value in the inner barrel 10 is monitored at the moment through the pressure measuring pipe 63, meanwhile, the experimental conditions are recorded and stored through the data acquisition system, and after the experiment is finished, the actual oil discharge data of the experiment can be obtained.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.