CN102865899A - In-situ fluid volume measuring method for use in high-temperature and high-pressure rock core displacement process and device thereof - Google Patents
In-situ fluid volume measuring method for use in high-temperature and high-pressure rock core displacement process and device thereof Download PDFInfo
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- CN102865899A CN102865899A CN2012103313600A CN201210331360A CN102865899A CN 102865899 A CN102865899 A CN 102865899A CN 2012103313600 A CN2012103313600 A CN 2012103313600A CN 201210331360 A CN201210331360 A CN 201210331360A CN 102865899 A CN102865899 A CN 102865899A
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Abstract
The invention discloses an in-situ fluid volume measuring method for use in a high-temperature and high-pressure rock core displacement process, and a device which can be used for measuring the fluid volume by using the method. The method comprises the following steps of: I, preparing before formal displacement to keep a fluid in the rock core, a fluid in a guide tube and a fluid in a container in a corresponding high-temperature and high-pressure environment; II, starting formal displacement: pumping a displacement liquid through a pressure pump, and converging the fluid (particularly gas and oil) driven out of the rock core through displacement in an enclosed transparent container; and III, measuring the volume of each fluid: after oil, gas and water are delaminated fully, reading the volumes of oil, gas and water through graduation marks on the container according to different colors of the three kinds of fluids. The design fluid volume measuring device is simple in structure, and is realized by only arranging four valves, two guide tubes, two pressure measuring instruments, a collecting container, a buffering container and a semi-permeable clapboard on the basis of the conventional high-temperature and high-pressure rock core displacement experimental device.
Description
Technical field
The present invention relates to a kind of fluid volume measurement mechanism simultaneously, particularly relates to a kind of High Temperature High Pressure rock core displacement process medium fluid volume measurement device.
Background technology
Under the High Temperature High Pressure, there is gas-liquid two-phase in the especially existence of high temperature so that displace fluid in the rock core displacement process.Displace at present the uncovered little graduated cylinder of the many employings of fluid and directly measure, gas phase just catches and measures and can't realize like this; In addition at high temperature, liquid is volatile, so the error in dipping of liquid is larger, and particularly in the tight sand displacement test, because displacing velocity is slow, it is very little to displace amount of liquid, and the error that the volatilization of liquid causes can be larger.Shortcoming for adopting uncovered a small amount of cylinder metering method to exist has proposed closed metering system, and namely one section thick liquid of filling (such as aviation kerosene) carries out shutoff in thin glass tube.Though gas can be caught and measure to this mode, also can avoid the volatilization of liquid, but still there are a lot of problems in this metering method, more topmost is that this metering method can't realize that fluid is in the hyperbaric environment, the variation of pressure is very large on the gas volume impact, also affect simultaneously the solubleness of gas in liquid, and then changed gas-liquid volume ratio, so each the phase fluid volume that measures under this mode is still inaccurate, can not truly reflect the fluid volume of rock core inside under the High Temperature High Pressure.
Summary of the invention
The object of the present invention is to provide a kind of method that in High Temperature High Pressure rock core displacement process, can carry out the fluid volume in site measurement, and can use the method to carry out the device that fluid volume is measured.
The objective of the invention is to be achieved through the following technical solutions: do following preliminary work before the formal displacement, the temperature of setting constant temperature oven is the required high-temperature temperature of experiment, after temperature is elevated to setting value and keeps certain hour, filling liquid respectively from the core holding unit two ends toward each conduit and container, wherein can discharge the air of being besieged by the valve of opening the collection container upper end, and then in the assurance collection container without air, then applying ring to core holding unit presses and axial compression, regulate the opening pressure of check valve greater than the pressure wait the rear liquid that pressurizes, then be pressurized to synchronously predetermined pressure from the core holding unit two ends to liquid respectively, but the pressure of liquid is less than ring pressure and the axial compression that applies after the pressurization, thereby so that rock core inner fluid, fluid and fluid in container are under the corresponding high temperature and high pressure environment in the conduit, in order to guarantee gas that displacement goes out coming together in the closed container as much as possible, in conduit, increased semi-permeable plate to stop gas to pass through; After above preliminary work is finished, begin formal displacement, at first turn down the opening pressure of check valve and be the pressure of the rear rock core inner fluid of pressurization, be the displacement liquid pressing by forcing pump then, when being elevated to the pressure of rock core inner fluid, can open towards the core holding unit valve pressure for the treatment of displacement liquid, continuation is the displacement liquid pressing by forcing pump, so that displacement liquid enters rock core, the fluid that displacement goes out from rock core (especially G﹠O) is before flowing out check valve, under action of gravitation, come together in the airtight transparent vessel; Measure before each fluid volume, preferably interrupt displacement and static regular hour, guarantee the fully layering in closed container of oil gas water, behind the oil and gas and water layer, the color of three kinds of fluids is different in addition, can read by the scale on the container three's volume, because the complicacy of rock core pore texture, in the whole displacement process, there is fluctuation in the pressure of fluid, for the fluctuation of slowing down fluid pressure, increased by a buffer container, filling air in the container.
The inventive method specifically comprises the steps:
Step 1: before the formal displacement, under hot environment, in each conduit and collection container, fill with liquid in advance, core holding unit applies after ring pressure and the axial compression, pressurize synchronously to liquid from the core holding unit two ends respectively again, so that fluid and fluid in container are under the corresponding high temperature and high pressure environment in the rock core inner fluid, conduit;
Step 2: begin formal displacement, the fluid that displacement goes out from rock core (especially G﹠O) was collected by a closed container before flowing out check valve;
Step 3: interrupt displacement, behind the static certain hour, oil gas water-mass density difference is so that three's layering in closed container, by the volume of the cup scale metered three on the container.
Before the present invention pressurizes to liquid synchronously from the core holding unit two ends, the opening pressure of check valve is greater than the pressure of the rear liquid of pressurization, the pressure of liquid is less than ring pressure and the axial compression that applies after the pressurization, when beginning formal displacement, turns down the opening pressure of check valve and is the pressure of rock core inner fluid after pressurizeing.
Can open valve when the pressure that the present invention squeezes into displacement liquid by forcing pump equals the pressure of rock core inner fluid, further improve in the situation of displacement fluid pressure, so that displacement liquid enters rock core.
The present invention uses semi-permeable plate to stop gas to pass through, thereby guarantees that gas collection that displacement goes out is in closed container.
In order to slow down the fluctuation of hydrodynamic pressure in the displacement process, increased by a buffer container, filling air in the container.
The device that High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method of the present invention uses is to have increased by four valves (2,8,10,14) on the basis of conventional High Temperature High Pressure rock core displacement test device, two conduits (7,13), two pressure-measuring devices (6,15), a collection container (9), a buffer container (12) and a semi-permeable plate (4).
The entrance of collection container of the present invention (9) is broad, and main body is very thin, and the top is provided with relief port (11), makes the material high temperature high voltage resistant, and is not yielding and transparent, and peripheral with strengthening steel slab, inwall scribbles hates oil reservoir.
Buffer container of the present invention (12) volume is large, makes material high temperature high voltage resistant and not yielding.
Compared with prior art, the invention has the beneficial effects as follows, the fluid that can go out displacement in High Temperature High Pressure and rock core displacement process carries out in site measurement, the fluid volume measuring accuracy is high, and the volume that can reflect more truly inner each phase fluid of rock core under the High Temperature High Pressure, designed apparatus structure is simple in addition, only needs to increase several accessories on the basis of conventional High Temperature High Pressure rock core displacement test device and gets final product.
Description of drawings
Fig. 1 is the structural representation of High Temperature High Pressure rock core displacement process medium fluid volume in-situ measurement device of the present invention;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Experimental provision in the accompanying drawing, except forcing pump 1, other device all is positioned in the constant temperature oven.Before formal displacement, the temperature of at first setting constant temperature oven is the required high-temperature temperature of experiment, valve-off 2, regulate the opening pressure of check valve 5 greater than the pressure wait the rear liquid that pressurizes, after temperature is elevated to setting value and keeps certain hour, open valve 8 and 14, respectively by conduit 7 and 13 from core holding unit 3 two ends toward each conduit and container filling liquid, discharge the air of being besieged therein by the valve 10 of opening collection container 9 upper ends during this time, guarantee in the collection container 9 without air, valve-off 10 more afterwards, then applying ring to core holding unit 3 presses and axial compression, then pressurize synchronously for liquid by conduit 7 and 13 respectively, after fluid pressure is elevated to predetermined pressure, valve-off 8 and 14, the pressure of liquid can be by two pressure-measuring devices 6 and 15 real-time monitored, in order to guarantee gas that displacement goes out coming together in the closed container 9 as much as possible, in conduit, increased semi-permeable plate 4 to stop gas to pass through; During formal displacement, at first turn down the opening pressure of check valve 5 and be the pressure of the rear rock core inner fluid of pressurization, then be the displacement liquid pressing by forcing pump 1, when being elevated to the pressure of rock core inner fluid, opens towards core holding unit valve 2 pressure for the treatment of displacement liquid, continue to be the displacement liquid pressing by forcing pump 1, the fluid that displacement goes out from rock core (especially G﹠O) under action of gravitation, came together in the collection container 9 before flowing out check valve 5; Collection container 9 transparent and on scale is arranged, static certain hour is so that behind the oil and gas and water layer, read three's volume by the scale on the collection container 9.
Claims (9)
1. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method is characterized in that comprising the steps:
Step 1: before the formal displacement, under hot environment, in each conduit and collection container, fill with liquid in advance, core holding unit applies after ring pressure and the axial compression, pressurize synchronously to liquid from the core holding unit two ends respectively again, so that fluid and fluid in container are under the corresponding high temperature and high pressure environment in the rock core inner fluid, conduit;
Step 2: begin formal displacement, the fluid that displacement goes out from rock core (especially G﹠O) was collected by a closed container before flowing out check valve;
Step 3: interrupt displacement, behind the static certain hour, oil gas water-mass density difference is so that three's layering in closed container, by the volume of the cup scale metered three on the container.
2. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method as claimed in claim 1, it is characterized in that, from the core holding unit two ends to synchronously pressurization of liquid before, the opening pressure of check valve is greater than the pressure of the rear liquid of pressurization, the pressure of liquid is less than ring pressure and the axial compression that applies after the pressurization, when beginning formal displacement, turn down the opening pressure of check valve and be the pressure of the rear rock core inner fluid of pressurization.
3. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method as claimed in claim 1, it is characterized in that, when equaling the pressure of rock core inner fluid, the pressure of squeezing into displacement liquid by forcing pump can open valve, further improving in the situation of displacement fluid pressure, so that displacement liquid enters rock core.
4. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method as claimed in claim 1 is characterized in that, uses semi-permeable plate to stop gas to pass through, thereby guarantees that gas collection that displacement goes out is in closed container.
5. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method as claimed in claim 1 is characterized in that, in order to slow down the fluctuation of hydrodynamic pressure in the displacement process, increases buffer container, filling air in the buffer container.
6. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method as claimed in claim 1, it is characterized in that displacement goes out in the rock core fluid be gas or (with) oil.
7. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measurement device, it is characterized in that, four valves (2,8,10,14) have been increased on the basis of conventional High Temperature High Pressure rock core displacement test device, two conduits (7,13), two pressure-measuring devices (6,15), a collection container (9), a buffer container (12) and a semi-permeable plate (4).
8. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measurement device as claimed in claim 7, it is characterized in that, the entrance of collection container (9) is wide, main body is thin, the top is provided with relief port (11), makes the material high temperature high voltage resistant, and is not yielding and transparent, peripheral with strengthening steel slab, inwall scribbles hates oil reservoir.
9. High Temperature High Pressure rock core displacement process medium fluid volume in-situ measurement device as claimed in claim 7 is characterized in that buffer container (12) volume is large, makes material high temperature high voltage resistant and not yielding.
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| CN201210331360.0A CN102865899B (en) | 2012-09-07 | 2012-09-07 | High Temperature High Pressure rock core displacement process medium fluid volume in-situ measuring method and device thereof |
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Cited By (6)
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| CN103383378A (en) * | 2013-07-19 | 2013-11-06 | 东北石油大学 | Oil gas adsorption-desorption displacement experiment device |
| CN105673003A (en) * | 2015-12-29 | 2016-06-15 | 中国石油天然气股份有限公司 | Tight oil exploitation physical simulation test method |
| CN106323402A (en) * | 2015-06-29 | 2017-01-11 | 中国石油天然气股份有限公司 | Flow measurement method and flow measurement device of rock core displacement experiment |
| CN106989792A (en) * | 2017-05-18 | 2017-07-28 | 太仓阳鸿石化有限公司 | The measuring method of liquid chemical product and gas volume in ship-to-shore feed-line |
| CN111663938A (en) * | 2019-03-05 | 2020-09-15 | 中国石油化工股份有限公司 | High-temperature drilling temperature measurement method |
| CN114509374A (en) * | 2020-11-17 | 2022-05-17 | 中国石油天然气股份有限公司 | Gas-liquid metering device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103383378A (en) * | 2013-07-19 | 2013-11-06 | 东北石油大学 | Oil gas adsorption-desorption displacement experiment device |
| CN103383378B (en) * | 2013-07-19 | 2014-11-05 | 东北石油大学 | Oil gas adsorption-desorption displacement experiment device |
| CN106323402A (en) * | 2015-06-29 | 2017-01-11 | 中国石油天然气股份有限公司 | Flow measurement method and flow measurement device of rock core displacement experiment |
| CN105673003A (en) * | 2015-12-29 | 2016-06-15 | 中国石油天然气股份有限公司 | Tight oil exploitation physical simulation test method |
| CN105673003B (en) * | 2015-12-29 | 2019-05-07 | 中国石油天然气股份有限公司 | A kind of fine and close oil exploitation physical simulation experiment method |
| CN106989792A (en) * | 2017-05-18 | 2017-07-28 | 太仓阳鸿石化有限公司 | The measuring method of liquid chemical product and gas volume in ship-to-shore feed-line |
| CN106989792B (en) * | 2017-05-18 | 2019-11-08 | 太仓阳鸿石化有限公司 | The measurement method of liquid chemical product and gas volume in ship-to-shore feed-line |
| CN111663938A (en) * | 2019-03-05 | 2020-09-15 | 中国石油化工股份有限公司 | High-temperature drilling temperature measurement method |
| CN111663938B (en) * | 2019-03-05 | 2023-07-04 | 中国石油化工股份有限公司 | High-temperature drilling temperature measurement method |
| CN114509374A (en) * | 2020-11-17 | 2022-05-17 | 中国石油天然气股份有限公司 | Gas-liquid metering device and method |
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