CN114428030B - Experimental device and method for simulating oil gas loss in core - Google Patents
Experimental device and method for simulating oil gas loss in core Download PDFInfo
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- CN114428030B CN114428030B CN202010941614.5A CN202010941614A CN114428030B CN 114428030 B CN114428030 B CN 114428030B CN 202010941614 A CN202010941614 A CN 202010941614A CN 114428030 B CN114428030 B CN 114428030B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 56
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 37
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 37
- 238000005303 weighing Methods 0.000 claims abstract description 37
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims description 23
- 238000005339 levitation Methods 0.000 claims description 17
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 10
- 238000011156 evaluation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 43
- 239000000126 substance Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 8
- 239000010779 crude oil Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000000295 fuel oil Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000105 evaporative light scattering detection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention provides an experimental device and method for simulating oil and gas loss in a core. The heating device, the fluid source and the pressure measuring device are respectively connected with the high-pressure container, and the temperature measuring device is arranged on the heating device. The processing unit is respectively connected with the temperature measuring device, the pressure measuring device and the weighing device. Control valves are arranged on the connecting pipeline between the fluid source and the high-pressure container and at the outlet of the high-pressure container, and the control valves can control the fluid source to enter or exit the high-pressure container. Fluid sources include oil and gas and drilling fluids. According to the experimental device and the method provided by the invention, experimental data of hydrocarbon loss of the rock core in the process of lifting the rock core from the bottom of the well to the wellhead and experimental data of loss of hydrocarbon at normal temperature and normal pressure after the rock core is taken out of the cylinder can be obtained, a new research method is provided for recovering the hydrocarbon loss in the rock core, and the evaluation research of the oil-gas content and the flowability of the stratum is facilitated.
Description
Technical Field
The invention relates to the technical field of oil and gas geological exploration and development, in particular to an experimental device and method for simulating oil and gas loss in a core.
Background
Cores, as the most valuable stratum samples, contain a great deal of geological information. The oil-gas content detection and analysis are performed after the core is taken out of the barrel, and are one of the basic works of comprehensive evaluation and research. Because oil gas has outstanding fluidity and diffusibility, loss (dissipation) of hydrocarbon substances in the core is universal after the core is lifted from the bottom of the well to the top of the well and out of the cylinder, and meanwhile, the core has obvious diversity. This variability is of great importance for accurate assessment of the oil and gas properties of the formation. In production and scientific research practice, a plurality of scholars pay attention to the problem of light hydrocarbon loss in the process of collecting, preserving, processing and testing rock samples, take some technical measures and measures, and research and establish some core light hydrocarbon loss compensation (or recovery) and oil-gas-containing property testing methods.
The method and the device disclosed in the prior art have certain advancement and practicability. However, in the process of lifting the core from the bottom of the well to the top of the well, along with depressurization and degassing and hydrocarbon material loss, researches on the loss rule, influence factors thereof and the like are to be deepened, and particularly, lack of corresponding experimental devices and methods is one of the key technical problems to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an experimental device and method for simulating oil and gas loss in a rock core, can obtain experimental data of hydrocarbon loss in the rock core in the process of lifting the rock core from a well bottom to a well head and experimental data of loss of hydrocarbon loss in the rock core at normal temperature and normal pressure after the rock core is discharged from a cylinder, provides a new research method for recovering hydrocarbon loss in the rock core, and is beneficial to evaluation research of oil and gas contents and flowability of a stratum.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
An experimental device for simulating oil and gas loss in a core comprises a high-pressure container for arranging a core sample, a weighing device, a heating device, a fluid source, a temperature measuring device, a pressure measuring device and a processing unit. Wherein the weighing device is arranged on the high-pressure vessel. The heating device, the fluid source and the pressure measuring device are respectively connected with the high-pressure container, and the temperature measuring device is arranged on the heating device. The processing unit is respectively connected with the temperature measuring device, the pressure measuring device and the weighing device. Control valves are arranged on the connecting pipeline between the fluid source and the high-pressure container and at the outlet of the high-pressure container, and the control valves can control the fluid source to enter or exit the high-pressure container. Fluid sources include oil and gas and drilling fluids.
According to the simulation experiment device provided by the invention, hydrocarbon substances (first fluid source) can be injected into the pore system of the core sample in a pressurizing injection mode under the set temperature condition on the basis of processing the core sample, and after the injection is balanced, the first fluid source is replaced by a second fluid source (drilling fluid, clear water and the like). Thereafter, a second fluid source (drilling fluid, clean water, etc.) is withdrawn from the pore system of the core sample in a depressurized drain. In the experimental process, the pressure, the temperature and the sample mass data in the injection process are obtained, the initial mass data of the sample after the fluid source is replaced and the pressure, the temperature and the sample mass data in the first fluid source (oil gas) discharging process are also obtained, and data support is provided for researching the loss rule of hydrocarbon substances in the process of lifting the rock core from the bottom of the well to the wellhead. After the experiment of the first stage is finished, the second fluid source (drilling fluid, clear water and the like) in the high-pressure container is emptied, so that the pressure and the temperature of the high-pressure container are in a normal pressure and normal temperature state, the change of the quality of the rock sample along with time is measured at preset time intervals or continuously, and meanwhile, the data support is provided for the research on the loss law of the gas hydrocarbon dissipated by the core sample at normal temperature and normal pressure through the concentration change data monitoring of the gas hydrocarbon in the high-pressure container.
Further improvements to the above described solution are possible as follows.
According to the experimental device for simulating oil and gas loss in the rock core, in a preferred embodiment, the weighing device is a magnetic levitation balance. The high-pressure container is internally provided with a sample holding device for arranging a core sample, and the sample holding device is connected with a permanent magnet of the magnetic suspension balance. The electromagnet of the magnetic levitation balance is positioned above the high-pressure container and is arranged opposite to the permanent magnet of the magnetic levitation balance. The balance body of the magnetic levitation balance is connected with and positioned above the electromagnet of the magnetic levitation balance.
The magnetic levitation balance is adopted to carry out non-contact weighing on the core sample placed in the closed high-pressure container, so that the whole device can be simplified, and the practicability and the testing accuracy of the whole experimental device can be improved.
Further, in a preferred embodiment, a limiting device for limiting the permanent magnet is provided in the high-pressure container.
Through setting up stop device, thereby can improve the structural stability of whole experimental apparatus and ensure the steady reliability of whole test process.
In particular, in a preferred embodiment, the fluid source is stored by a pressure vessel and pumped into the high pressure vessel by a piston pump connected to the pressure vessel. The pressure measuring device is connected with a connecting pipeline between the piston pump and the pressure container.
Through the cooperation of pressure vessel and piston pump, can be convenient for in the experiment fluid source reach preset pressure in the high-pressure vessel of discharging into fast steadily to effectively improve test efficiency, can acquire required experimental data in time effectively through pressure measuring device.
In particular, in a preferred embodiment, the control valve at the outlet of the high pressure vessel is a vent valve.
Based on the control action of the emptying valve, the fluid source can be ensured to be smoothly discharged out of the high-pressure container, the experimental device can be simplified as much as possible, and the oil source is reasonably utilized, so that the experimental cost can be effectively saved.
Specifically, in a preferred embodiment, the heating device is a temperature control bath provided around the outer periphery of the high-pressure vessel, and the temperature measuring device is disposed on the temperature control bath.
The temperature control bath can well realize the temperature regulation and heat preservation effects in the pressure vessel, and the processing unit can acquire temperature data in time.
In particular, in a preferred embodiment, the experimental device for simulating oil and gas loss in a core of the invention further comprises a vacuumizing device connected with the high-pressure container, and the pressure measuring device is connected with a connecting pipeline between the vacuumizing device and the high-pressure container.
Before a specific experiment, the high-pressure container is vacuumized through the vacuumizing device, so that the core sample can be ensured to suck hydrocarbon substances as much as possible under the condition of simulating formation pressure at the beginning of the experiment, and the accuracy and reliability of experimental data are effectively ensured.
According to the experimental method for simulating oil and gas loss in a rock core, which is implemented by adopting the device, the experimental method comprises the following steps: and S01, placing the core sample in a high-pressure container, weighing the core sample through a weighing device, and transmitting data to a processing unit. S02, heating the high-pressure container to a preset temperature through the heating device, wherein the preset temperature is set according to simulated stratum temperature conditions. And S03, adding oil gas into the high-pressure container, detecting the pressure and the mass of the core sample in real time through the pressure measuring device and the weighing device in the process, and transmitting data to the processing unit. S04, when the pressure in the high-pressure container reaches a preset pressure value, standing for a preset period of time; wherein the preset pressure is set with reference to simulated formation conditions. S05, replacing oil gas in the high-pressure container with drilling fluid under the condition of keeping a preset pressure value, standing for a preset period of time, detecting the mass of the core sample through the weighing device, and transmitting data to the processing unit. And S06, when the pressure in the high-pressure container is reduced to reach a preset pressure value, standing for a preset period of time, weighing the core sample by a weighing device, and transmitting data to a processing unit. S07, evacuating the drilling fluid in the high-pressure container, and ensuring that the core sample is in a normal temperature and normal pressure environment. And S08, carrying out core sample quality detection at preset time intervals or continuously through a weighing device, collecting a gas sample in a high-pressure container, measuring the concentration and the components of the gaseous hydrocarbon, and transmitting data to a processing unit.
According to the experimental method for simulating oil and gas loss in the core, experimental data of hydrocarbon loss of a core sample in the process of lifting a simulated core from a bottom hole to a wellhead can be obtained, and experimental data of loss of hydrocarbon loss in the core at normal temperature and normal pressure after the core is discharged from a barrel are also obtained. When a representative core sample is selected and experiments are carried out under different types of hydrocarbon substances (light oil, heavy oil and different dissolved gas contents) and different temperature and pressure conditions, a hydrocarbon substance loss model under various conditions can be established for evaluating and researching the oil-gas properties of the stratum.
Further improvements to the above described solution are possible as follows.
According to the experimental method for simulating oil and gas loss in a core of the present invention, in a preferred embodiment, in step S06, the pressure in the high pressure vessel is reduced in a stepped manner.
The pressure in the high-pressure container is gradually reduced in a step-down mode, so that the pressure in the pressure container can be ensured to be more stably reduced, and the stability and reliability of the whole experimental process and accurate data are effectively ensured.
Specifically, in a preferred embodiment, before heating the high-pressure container, the high-pressure container is vacuumized in step S02, and the vacuumized condition is monitored by the pressure measuring device.
This approach can further improve the accuracy of experimental data.
Compared with the prior art, the invention has the advantages that: experimental data for simulating the loss of oil and gas in the rock in the process of lifting the rock core from the bottom of the well to the wellhead can be obtained; the loss experimental data of the gaseous hydrocarbon in the core at normal temperature and normal pressure after the core is taken out of the cylinder can be obtained; when a representative core sample is selected, experiments are carried out on different types of crude oil (light oil, heavy oil and different dissolved gas contents) under different temperature and pressure conditions, a hydrocarbon loss model in the core under various conditions can be established for evaluating and researching the hydrocarbon bearing property of the stratum.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
Fig. 1 schematically shows the overall structure of an experimental apparatus for simulating loss of oil and gas in a core according to an embodiment of the present invention.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific examples, which are not intended to limit the scope of the invention.
FIG. 1 schematically shows the overall structure of an experimental apparatus 10 for simulating loss of oil and gas in a core according to an embodiment of the invention.
Example 1
As shown in fig. 1, an experimental apparatus 10 for simulating loss of oil and gas in a core according to an embodiment of the present invention includes a high-pressure vessel 1 for disposing a core sample 7, a weighing device 2, a heating device 3, a fluid source 4, a temperature measuring device, a pressure measuring device 5, and a processing unit 6. Wherein the weighing device 2 is arranged on the high-pressure vessel 1. The heating device 3, the oil and gas source 4 and the pressure measuring device 5 are connected to the high-pressure vessel 1, and the temperature measuring device is arranged on the heating device 3. The processing unit 6 is connected to the temperature measuring device, the pressure measuring device 5 and the weighing device 2, respectively. A pressure vessel is arranged on a connecting pipeline between the oil gas source 4 and the high-pressure vessel 1. The connecting pipeline between the fluid source 4 and the high-pressure container 1 and the outlet of the high-pressure container 1 are both provided with control valves 8, and the control valves 8 can control the fluid source 4 to enter or exit the high-pressure container 1. The fluid source 4 comprises oil and gas and drilling fluid.
According to the simulation experiment device provided by the embodiment of the invention, on the basis of processing the core sample, a first fluid source (oil gas) is injected into a pore system of the core sample in a pressurizing injection mode under a set temperature condition, and after the injection is balanced, the first fluid source is replaced by a second fluid source (drilling fluid, clear water and the like). Thereafter, a second fluid source (drilling fluid, clean water, etc.) is withdrawn from the pore system of the core sample in a depressurized drain. In the experimental process, the pressure, the temperature and the sample mass data in the injection process are obtained, the initial mass data of the sample after the fluid source is replaced and the pressure, the temperature and the sample mass data in the first fluid source (oil gas) discharging process are also obtained, and data support is provided for researching the loss rule of hydrocarbon substances in the process of lifting the rock core from the bottom of the well to the wellhead. After the experiment of the first stage is finished, the second fluid source (drilling fluid, clear water and the like) in the high-pressure container is emptied, so that the pressure and the temperature of the high-pressure container are in a normal pressure and normal temperature state, the change of the quality of the rock sample along with time is measured at preset time intervals or continuously, and meanwhile, the data support is provided for the research on the loss law of the gas hydrocarbon dissipated by the core sample at normal temperature and normal pressure through the concentration change data monitoring of the gas hydrocarbon in the high-pressure container.
Specifically, in the present embodiment, the control valve 8 at the outlet of the high-pressure vessel 1 is a purge valve. Based on the control action of the emptying valve, the fluid source can be ensured to be smoothly discharged out of the high-pressure container, the experimental device can be simplified as much as possible, and the oil source is reasonably utilized, so that the experimental cost can be effectively saved.
Further, as shown in fig. 1, the experimental device 10 for simulating oil and gas loss in a core according to the embodiment of the invention further comprises a vacuumizing device 9 connected with the high-pressure container 1, and the pressure measuring device 5 is connected with a connecting pipeline between the vacuumizing device 9 and the high-pressure container 1. Before a specific experiment, the high-pressure container is vacuumized through the vacuumizing device, so that the core sample can be ensured to suck hydrocarbon substances as much as possible under the condition of simulating formation pressure at the beginning of the experiment, and the accuracy and reliability of experimental data are effectively ensured. Specifically, in the present embodiment, the evacuation device 9 is a vacuum pump.
Specifically, as shown in fig. 1, in the present embodiment, the weighing device 2 is a magnetic levitation balance. The high-pressure container 1 is internally provided with a sample holding device 11 for arranging the core sample 7, and the sample holding device 11 is connected with a permanent magnet 21 of the magnetic suspension balance. The electromagnet 22 of the magnetic levitation balance is positioned above the high-pressure container 1 and is arranged opposite to the permanent magnet 21 of the magnetic levitation balance. The balance body 23 of the magnetic levitation balance is connected to and above the electromagnet 22 of the magnetic levitation balance. The magnetic levitation balance is adopted to carry out non-contact weighing on the core sample placed in the closed high-pressure container, so that the whole device can be simplified, and the practicability and the testing accuracy of the whole experimental device can be improved. Further, in the present embodiment, a stopper 12 for restricting the permanent magnet 21 is provided in the high-pressure vessel 1. Through setting up stop device, thereby can improve the structural stability of whole experimental apparatus and ensure the steady reliability of whole test process.
Specifically, in the present embodiment, the oil and gas source 4 is stored by the pressure vessel 41 and pumped into the high pressure vessel 1 by the piston pump 42 connected to the pressure vessel 41. The pressure measuring device 5 is connected to a connecting line between the piston pump 42 and the pressure vessel 1. Through the cooperation of pressure vessel and piston pump, can be convenient for in the experiment the oil gas source reach preset pressure in advance and discharge into high pressure vessel fast steadily to effectively improve test efficiency, can acquire required experimental data in time effectively through pressure measuring device.
Specifically, in the present embodiment, the heating device 3 is a temperature control bath 31 fitted around the outer periphery of the high-pressure vessel 1, and the temperature measuring device is disposed on the temperature control bath 31. The temperature control bath can well realize the temperature regulation and heat preservation effects in the pressure vessel, and the processing unit can acquire temperature data in time.
Example 2
The experimental method for simulating the loss of oil and gas in the core according to the embodiment of the invention is implemented by adopting the device 10, and comprises the following steps: and S01, placing the core sample 7 in the high-pressure container 1, weighing the core sample 7 by the weighing device 2, and transmitting data to the processing unit 6. S02, heating the high-pressure container 1 to a preset temperature through the heating device 3, wherein the preset temperature is set according to simulated stratum temperature conditions. And S03, adding oil gas into the high-pressure container 1, detecting the pressure and the mass of the core sample 7 in real time through the pressure measuring device 5 and the weighing device 2 in the process, and transmitting data to the processing unit 6. S04, when the pressure in the high-pressure container 1 reaches a preset pressure value, standing for a preset period of time; wherein the preset pressure is set with reference to simulated formation conditions. S05, replacing oil gas in the high-pressure container 1 with drilling fluid under the condition of keeping a preset pressure value, standing for a preset period of time, detecting the mass of the core sample 7 through the weighing device 2, and transmitting data to the processing unit 6. And S06, when the pressure in the high-pressure container 1 is reduced to reach a preset pressure value, standing for a preset period of time, weighing the core sample 7 by the weighing device 2, and transmitting data to the processing unit 6. S07, evacuating the drilling fluid in the high-pressure container 1, and ensuring that the core sample is in a normal temperature and normal pressure environment; and S08, carrying out mass detection on the core sample 7 by a weighing device 2 every interval for a preset time period or continuously, collecting the gaseous oil gas in the high-pressure container 1, measuring the concentration (content) and the components, and transmitting the data to a processing unit.
According to the experimental method for simulating the loss of oil and gas in the rock core, experimental data of hydrocarbon loss of a rock core sample in the process of lifting the simulated rock core from a bottom hole to a wellhead can be obtained, and experimental data of loss of hydrocarbon loss in the rock core at normal temperature and normal pressure after the rock core is discharged from a cylinder can be obtained. When a representative core sample is selected and experiments are carried out under different types of hydrocarbon substances (light oil, heavy oil and different dissolved gas contents) and different temperature and pressure conditions, a hydrocarbon substance loss model under various conditions can be established for evaluating and researching the oil-gas properties of the stratum.
Further, in the present embodiment, before heating the high-pressure container 1 in step S02, the high-pressure container 1 is vacuumized, and the vacuumized condition is monitored by the pressure measuring device 5. This approach can further improve the accuracy of experimental data.
Specifically, in the present embodiment, in step S06, the pressure inside the high-pressure vessel 1 is gradually reduced in a stepwise manner. The pressure in the high-pressure container is gradually reduced in a step-down mode, so that the pressure in the pressure container can be ensured to be more stably reduced, and the stability and reliability of the whole experimental process and accurate data are effectively ensured.
Preferably, in the present embodiment, the preset time period for standing is 12 to 24 hours in step S04 to step S06, and the preset time period for standing is 0.5 to 1.5 hours in step S06.
The procedure of one specific experiment conducted by the experimental method of this example was as follows:
(1) Preparing a crude oil sample; (2) Placing a core sample 7 weighing 10g into the high pressure vessel 1; (3) vacuum-pumping the high-pressure container 1; (4) Heating the high-pressure container 1 to 80 ℃ through a temperature control bath 31; (5) Pumping a crude oil sample into a high-pressure container 1 through a piston pump 42 and a pressure container 41, and boosting the pressure to 20MPa; (6) standing for 12 hours, and keeping the temperature and the pressure stable; (7) After the crude oil sample is replaced by the drilling fluid, standing for 1 hour; the mass of the core sample 7 at this time was recorded as 6.8g; (8) The pressure of the high-pressure vessel 1 was gradually lowered to normal pressure, and after standing for 1 hour, the mass of the core sample 7 was 6.75g.
From the above experimental preliminary analysis, the sample lost 0.05g of crude oil in the depressurization process, regardless of the difference in crude oil density at 20MPa and normal pressure.
According to the embodiment, the experimental device and the method for simulating the loss of the oil gas in the rock core can obtain experimental data of the loss of the oil gas in the rock during the process of lifting the simulated rock core from the bottom of the well to the wellhead; the experimental data of loss of oil gas in the core at normal temperature and normal pressure after the core is discharged from the cylinder can be obtained; when a representative core sample is selected, experiments are carried out on different types of crude oil (light oil, heavy oil and different dissolved gas contents) under different temperature and pressure conditions, a hydrocarbon loss model in the core under various conditions can be established for evaluating and researching the hydrocarbon bearing property of the stratum.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An experimental device for simulating oil and gas loss in a core is characterized by comprising a high-pressure container for arranging a core sample, a weighing device, a heating device, a fluid source, a temperature measuring device, a pressure measuring device and a processing unit; wherein,
The weighing device is arranged on the high-pressure container;
The heating device, the fluid source and the pressure measuring device are respectively connected with the high-pressure container, and the temperature measuring device is arranged on the heating device;
the processing unit is respectively connected with the temperature measuring device, the pressure measuring device and the weighing device;
Control valves are arranged on a connecting pipeline between the fluid source and the high-pressure container and at the outlet of the high-pressure container, and the control valves can control the fluid source to enter or exit the high-pressure container;
The fluid source comprises oil gas and drilling fluid;
the fluid source is stored by the pressure vessel and pumped into the high pressure vessel by a piston pump connected to the pressure vessel;
The piston pump is configured to displace oil gas in the high-pressure container with drilling fluid after the pressure in the high-pressure container rises to a first preset pressure and is kept stand for a preset period of time, and to empty the drilling fluid in the high-pressure container after the pressure in the high-pressure container falls to a second preset pressure and is kept stand for a preset period of time, wherein the first preset pressure is greater than the second preset pressure.
2. The experimental device for simulating hydrocarbon loss in a core of claim 1, wherein the weighing device is a magnetic levitation balance; wherein,
The high-pressure container is internally provided with a sample holding device for arranging a core sample, and the sample holding device is connected with a permanent magnet of the magnetic suspension balance;
The electromagnet of the magnetic levitation balance is positioned above the high-pressure container and is arranged opposite to the permanent magnet of the magnetic levitation balance;
The balance body of the magnetic levitation balance is connected with and positioned above the electromagnet of the magnetic levitation balance.
3. The experimental device for simulating oil and gas loss in a rock core according to claim 2, wherein a limiting device for limiting the permanent magnet is arranged in the high-pressure container.
4. An experimental device for simulating hydrocarbon loss in a core according to any one of claims 1 to 3, wherein the pressure measurement device is connected to a connecting line between the piston pump and the pressure vessel.
5. An experimental device for simulating hydrocarbon loss in a core according to any one of claims 1-3, wherein the control valve at the outlet of the high pressure vessel is a blow-down valve.
6. An experimental device for simulating oil and gas loss in a core according to any one of claims 1 to 3, wherein the heating device is a temperature control bath sleeved on the periphery of the high pressure vessel, and the temperature measuring device is arranged on the temperature control bath.
7. An experimental device for simulating the loss of oil and gas in a core according to any one of claims 1 to 3, further comprising a vacuum pumping device connected to the high pressure vessel, wherein the pressure measuring device is connected to a connecting line between the vacuum pumping device and the high pressure vessel.
8. An experimental method for simulating oil and gas loss in a core, implemented by the device of any one of the claims 1 to 7, comprising the steps of:
S01, placing a core sample in a high-pressure container, weighing the core sample by a weighing device, and transmitting data to a processing unit;
s02, heating the high-pressure container to a preset temperature through a heating device, wherein the preset temperature is set according to simulated stratum temperature conditions;
S03, adding oil gas into a high-pressure container, detecting the pressure and the quality of the core sample in real time through a pressure measuring device and a weighing device in the process, and transmitting data to a processing unit;
S04, when the pressure in the high-pressure container reaches a preset pressure value, standing for a preset period of time; wherein the preset pressure is set with reference to simulated formation conditions;
S05, replacing oil gas in the high-pressure container with drilling fluid under the condition of keeping a preset pressure value, standing for a preset period of time, detecting the mass of the core sample through a weighing device, and transmitting data to a processing unit;
s06, when the pressure in the high-pressure container is reduced to reach a preset pressure value, standing for a preset period of time, weighing the core sample by a weighing device, and transmitting data to a processing unit;
S07, evacuating the drilling fluid in the high-pressure container, and ensuring that the core sample is in a normal temperature and normal pressure environment;
And S08, carrying out core sample quality detection at preset time intervals or continuously through a weighing device, collecting a gas sample in a high-pressure container, measuring the concentration and the components of the gaseous hydrocarbon, and transmitting data to a processing unit.
9. The experimental method for simulating oil and gas loss in a core according to claim 8, wherein in step S06, the pressure in the high pressure vessel is reduced in a stepped down manner.
10. The experimental method for simulating oil and gas loss in a core according to claim 8, wherein in step S02, the high-pressure vessel is vacuumized before being heated, and the vacuumized condition is monitored by a pressure measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010941614.5A CN114428030B (en) | 2020-09-09 | 2020-09-09 | Experimental device and method for simulating oil gas loss in core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010941614.5A CN114428030B (en) | 2020-09-09 | 2020-09-09 | Experimental device and method for simulating oil gas loss in core |
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| Publication Number | Publication Date |
|---|---|
| CN114428030A CN114428030A (en) | 2022-05-03 |
| CN114428030B true CN114428030B (en) | 2024-05-14 |
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| FR2853071B1 (en) * | 2003-03-26 | 2005-05-06 | Inst Francais Du Petrole | METHOD AND DEVICE FOR EVALUATING PHYSICAL PARAMETERS OF A UNDERGROUND DEPOSIT FROM ROCK DEBRIS WHICH ARE TAKEN THEREFROM |
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| US5345819A (en) * | 1990-10-22 | 1994-09-13 | Chevron Research And Technology Company | Method and apparatus for wellbore stability analysis |
| US6076961A (en) * | 1997-02-27 | 2000-06-20 | Elf Antar France | Method and device for determining the low-temperature stability of a hydrocarbon mixture |
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