CN114459964A - Multi-pipe parallel experimental device capable of measuring channeling rule - Google Patents
Multi-pipe parallel experimental device capable of measuring channeling rule Download PDFInfo
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- CN114459964A CN114459964A CN202210071295.6A CN202210071295A CN114459964A CN 114459964 A CN114459964 A CN 114459964A CN 202210071295 A CN202210071295 A CN 202210071295A CN 114459964 A CN114459964 A CN 114459964A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
Abstract
The invention belongs to the technical field of petroleum development equipment, and particularly relates to a multi-pipe parallel experimental device capable of measuring a channeling rule, which comprises an injection end, an extraction end, a pressure sensor, a flowmeter, a high-permeability injection end, a low-permeability injection end, a test end connector and a confining pressure shell, wherein the injection end is connected with the extraction end through a pipeline; the injection end is respectively communicated with the high-permeability core and the low-permeability core through the high-permeability injection end and the low-permeability injection end, the tail ends of the high-permeability core and the low-permeability core are provided with extraction ends, the high-permeability core and the low-permeability core are communicated through three test end connectors, flow meters are mounted on the test end connectors on two sides, and a pressure sensor is mounted on the test end connector in the middle; the high-permeability core and the low-permeability core are located in the confining pressure shell, and a confining pressure inlet is formed in the confining pressure shell. The experimental device can quantitatively measure the flow channeling rate and the pressure distribution rule under the conditions of different permeabilities and different oil saturation degrees.
Description
Technical Field
The invention belongs to the technical field of petroleum development equipment, and particularly relates to a multi-pipe parallel experimental device capable of measuring a channeling rule.
Background
Due to the different permeability of each layer of the heterogeneous reservoir in the layer, the fluid in one layer may flow into another layer perpendicular to the general flow direction under the action of one or more of viscous force, gravity and capillary force. In the early stage of injection, the displacement front edge of the high-permeability layer tends to move fastest, the difference of the positions of the front edges of all layers leads to the non-uniformity of the saturation of the upper fluid in all layers, so that the fluid can flow into the low-permeability layer (water-wet) from the high-permeability layer under the action of capillary force, and capillary force seepage and absorption in the vertical direction are called capillary force channeling. Meanwhile, if the fluidity ratio M is not 1, the pressure distribution of each layer is different, a pressure gradient exists vertically in the layer, and thus the resulting vertical flow is called viscous cross flow. Gravity differentiation can lead to gravity cross flow over the layers. At present, the channeling experimental study aiming at water flooding, polymer flooding and the like can only study the channeling rule through calculation or CT and nuclear magnetism, the method has high cost and can only qualitatively describe the channeling rule between layers, and large errors exist in the experimental process. In addition, the method can only simulate the flow channeling at a certain moment, and cannot comprehensively simulate the flow channeling condition at any moment in the displacement experiment process. Moreover, all the current crude oil displacement experiments are carried out without considering the cross flow between the intervals with different permeability, and actually the cross flow between the intervals is inevitable, and if the cross flow between the intervals is considered, the cross flow rule between different permeability or the same permeability and different oil saturation is difficult to be described quantitatively in the specific experimental process. Therefore, it is necessary to design a multi-tube parallel experimental device capable of measuring the channeling rule.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a multi-pipe parallel experimental device capable of measuring a channeling rule, which can quantitatively measure the channeling flow and the pressure distribution rule under the conditions of different permeabilities and different oil saturation degrees.
The technical scheme adopted by the invention is as follows: a multi-pipe parallel experimental device capable of measuring a channeling rule comprises an injection end, a production end, a pressure sensor, a flowmeter, a high-permeability injection end, a low-permeability injection end, a test end connector and a confining pressure shell; the injection end is respectively communicated with the high-permeability core and the low-permeability core through the high-permeability injection end and the low-permeability injection end, the tail ends of the high-permeability core and the low-permeability core are provided with extraction ends, the high-permeability core and the low-permeability core are communicated through three test end connectors, flow meters are mounted on the test end connectors on two sides, and a pressure sensor is mounted on the test end connector in the middle; the high-permeability core and the low-permeability core are located in the confining pressure shell, and a confining pressure inlet is formed in the confining pressure shell.
Further, the test end connector is made of a metal material.
Further, the joint of the test end connector and the rock core is wrapped by rubber.
Furthermore, whether the flow is caused by the channeling at different positions among the cores with different permeability in the water flooding process can be observed through the reading of the pressure sensor connected with the test end connector.
Further, the cross-flow between different locations at different permeabilities during the flooding process can be observed by reading the meter attached to the test end connector.
Furthermore, the flow channeling conditions of different positions of the rock cores with different permeability in the polymer flooding or three-component composite flooding process are observed through the readings of the flow meter and the pressure sensor.
Furthermore, during measurement, the injection pump is connected with the middle container and then connected with the pipeline to the injection end, cores with high permeability and low permeability (or different oil saturation degrees) are sequentially connected, a test end connector is added in the middle of each core and is respectively connected with the pressure sensor and the flowmeter, certain confining pressure is added in a mode of injecting water or oil into a confining pressure port, the flow or pressure is set after the displacement pump is started, and the flow channeling rule in the water flooding process is quantitatively researched by measuring the flow channeling and the pressure channeling. The device can quantitatively measure the flow-through flow and the pressure distribution rule under the conditions of different permeabilities and different oil saturation degrees.
The invention has the beneficial effects that: the multi-pipe parallel experimental device capable of measuring the channeling rule can quantitatively measure the channeling flow and the pressure distribution rule under the conditions of different permeabilities and different oil saturation degrees. Compared with the prior art, the experimental device can accurately describe the flow-over pressure and flow-over flow among various permeability (intervals); the method can be used for simulating the flow channeling pressure and flow between each layer section in the whole experiment process by water flooding, polymer flooding and binary and ternary combination flooding; the method has the advantages of low measurement cost, strong operability and wide popularization value.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Detailed Description
Example one
Referring to fig. 1, the experimental device comprises an injection end 1, a production end 2, a pressure sensor 3, a flowmeter 4, a high-permeability injection end 5, a low-permeability injection end 6, a test end connector 7 and a confining pressure shell 11; the injection end 1 is respectively communicated with a high-permeability core 9 and a low-permeability core 10 through a high-permeability injection end 5 and a low-permeability injection end 6, the tail ends of the high-permeability core 9 and the low-permeability core 10 are provided with extraction ends 2, the high-permeability core 9 and the low-permeability core 10 are communicated through three test end connectors 7, flow meters 4 are mounted on the test end connectors 7 on two sides, and a pressure sensor 3 is mounted on the test end connector 7 in the middle; the high-permeability core 9 and the low-permeability core 10 are positioned in a confining pressure shell 11, and a confining pressure inlet 8 is formed in the confining pressure shell 11; the test end connector 7 is made of metal materials; the joint of the test end connector 7 and the rock core is wrapped by rubber.
The liquid injected from the injection end enters the production end after passing through two (or more) cores with different permeabilities, and the water content and recovery ratio change of each permeability core and the comprehensive water content and overall recovery ratio change rule are calculated by measuring the oil and water production amount in the fluid at the discharge end. The pressure sensors are connected through the test end connectors and connected with different positions of different rock cores, and pressure distribution at different positions of the rock cores can be measured through the pressure sensors. The flowmeter is connected with different cores through the test end connector, and the flow channeling flow of the different cores at different positions is measured through the flowmeter. The test end connector is wrapped up with the both ends of rock core contact through rubber, guarantees that the inside drunkenness that can not take place of rock core, and the connector itself is made for the metal, but connecting pressure sensor and flowmeter are provided with the passageway in different positions department in addition, connect both ends rock core. And certain water or oil is injected into the confining pressure inlet to ensure that two (or more) rock cores can perform subsequent water flooding (or polymer, binary and ternary flooding) experiments under certain confining pressure.
The experimental method comprises the following steps: firstly, placing the configured displacement liquid in an intermediate container, connecting an injection pump with the intermediate container, then connecting a pipeline to an injection end, and sequentially accessing rock cores with high permeability and low permeability (or different oil saturation); a test end connector is added in the middle of the device and is respectively connected with a pressure sensor and a flowmeter; and finally, adding certain confining pressure in a mode of injecting water or oil into the confining pressure port, setting flow or pressure after the displacement pump is started, and quantitatively researching the flow channeling rule in the water drive process by measuring the flow channeling and the pressure channeling in the process.
Example two
According to the experimental requirements in the first embodiment, the cores are not limited to two, the connectors are not limited to three, and the other measuring instruments are not limited to the number defined in the first embodiment.
Claims (3)
1. The utility model provides a multitube parallel experiment device of measurable quantity crossflow law which characterized in that: the experimental device comprises an injection end (1), a production end (2), a pressure sensor (3), a flowmeter (4), a high-permeability injection end (5), a low-permeability injection end (6), a test end connector (7) and a confining pressure shell (11); the injection end (1) is communicated with a high-permeability core (9) and a low-permeability core (10) through a high-permeability injection end (5) and a low-permeability injection end (6) respectively, the tail ends of the high-permeability core (9) and the low-permeability core (10) are provided with extraction ends (2), the high-permeability core (9) and the low-permeability core (10) are communicated through three test end connectors (7), flow meters (4) are installed on the test end connectors (7) on two sides, and a pressure sensor (3) is installed on the test end connector (7) in the middle; the high-permeability core (9) and the low-permeability core (101) are located in a confining pressure shell (11), and a confining pressure inlet (8) is formed in the confining pressure shell (11).
2. The multi-pipe parallel experimental device capable of measuring the channeling rule as claimed in claim 1, wherein: the test end connector (7) is made of metal materials.
3. The multi-pipe parallel experimental device capable of measuring the channeling law as claimed in claim 2, wherein: the joint of the test end connector (7) and the rock core is wrapped by rubber.
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| CN202210071295.6A CN114459964A (en) | 2022-01-21 | 2022-01-21 | Multi-pipe parallel experimental device capable of measuring channeling rule |
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2022
- 2022-01-21 CN CN202210071295.6A patent/CN114459964A/en active Pending
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