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Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method

A technology of oil and gas migration and accumulation and physical simulation, applied in the field of oil and gas exploration and development, can solve the problems that cannot reflect the characteristics of the curved surface of underground formations, control the physical experiment system of oil and gas migration and accumulation mechanism, and the influence of outlet pressure and outlet pressure, etc., to achieve three-dimensional Visual effects

Inactive Publication Date: 2015-09-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) The existing physical simulations of the mechanism of oil and gas migration and accumulation are basically carried out around faults, unconformities and single sand bodies, and there is no physical experiment system for controlling the mechanism of oil and gas migration and accumulation according to the lithological configuration structure
[0011] (2) The existing physical simulation methods of oil and gas migration paths either do not consider the influence of charging pressure on the simulated path, or only consider the influence of inlet pressure on the simulation experiment. Since the actual underground oil and gas migration is dominated by the migration force, The formation pressure is one of the important migration forces, and the oil and gas migration process is affected by both the inlet pressure and the outlet pressure, that is, the confining pressure and pressure relief conditions in the actual geological process.
Therefore, the existing technology does not really solve the simulation experiment technology under voltage control
[0012] (3) The existing physical models are all filled with sand bodies in a single box, which cannot effectively set up lithological configuration structures and study the mechanism of reservoir control
[0013] (4) In the existing physical simulation experiment system, the filled quartz sand layer is mostly designed horizontally, which cannot reflect the characteristics of the curved surface of the underground formation, especially the characteristics of oil and gas migration along the structural ridge

Method used

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  • Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method
  • Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method
  • Lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method

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specific Embodiment 1

[0054] Specific embodiment one: as figure 1 As shown, a physical simulation system for oil and gas migration and accumulation controlled by lithological composite structure includes a simulation box 1, a pressure control system connected to the oil injection port 2 and oil outlet 3 of the simulation box 1, and the data connected to the pressure control system Process analysis system4. The simulation box 1 is made of fully transparent tempered glass, which is convenient for observing the process of oil and gas migration and accumulation. chamber, the top and bottom surfaces of each layer of simulation chambers are provided with holes 29 with a diameter of 75 microns, which are effective for preventing leakage of quartz sand with a particle size of more than 200 meshes, but cannot prevent the seepage of oil, gas, and water, so , oil, gas, and water can flow up and down through the top and bottom plates of each simulation chamber, making the entire simulation system an effective...

specific Embodiment 2

[0079] Specific embodiment two: different from the specific embodiment one, in the specific embodiment two, the simulation box 1 includes a lower bottom plate 5, an upper top plate 6 and five layers of simulation chambers installed between the lower bottom plate 5 and the upper top plate 6, wherein, The top and bottom surfaces of the simulation chamber on the topmost layer have no holes, and the top and bottom surfaces of the simulation chambers on the remaining layers are provided with holes 29 with a diameter of 150 microns. The seepage of oil, gas, and water cannot be prevented. Therefore, oil, gas, and water can flow up and down through the top and bottom plates of each simulation chamber, making the entire simulation system an effective whole in which fluids can freely penetrate.

[0080] Such as Figure 9 As shown, a four-layer lithological structure configuration model is designed in this embodiment, and the model is composed of drawer II, drawer III, drawer IV, and dra...

specific Embodiment 3

[0093] Specific embodiment three: different from the specific embodiment one, in the specific embodiment three, the simulation box 1 includes a lower bottom plate 5, an upper top plate 6 and five layers of simulation chambers installed between the lower bottom plate 5 and the upper top plate 6, wherein, The top and bottom surfaces of the top two simulation chambers have no holes, and the top and bottom surfaces of the remaining simulation chambers are provided with holes 29 with a diameter of 200 microns, which are effective for preventing leakage of quartz sand with a particle size above 75 mesh. But it cannot prevent the seepage of oil, gas, and water. Therefore, oil, gas, and water can flow up and down through the top and bottom plates of each simulation chamber, making the entire simulation system an effective whole in which fluids can freely penetrate.

[0094] Such as Figure 13 As shown, a three-layer lithological structure configuration model is designed in this embodi...

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Abstract

The invention relates to a lithological association structure-controlled oil and gas migration and accumulation physical simulation system and experimental method. The simulation system comprises a simulation box, a pressure control system connected with an oil inlet and an oil outlet of the simulation box, and a data processing and analyzing system connected with the pressure control system, wherein the simulation box comprises a lower base plate, a top plate and multiple layers of simulation chambers installed between the lower base plate and the top plate, and holes are formed in the top surface and bottom surface of each simulation chamber, or no hole is formed in the top surface or bottom surface of at least one layer of simulation chamber. The simulation box is designed to be a box-structure physical model provided with the multiple layers of simulation chambers, and rock mass with different lithological characters can be allocated to different simulation chambers conveniently and quickly, so that different lithological configure structure models are established and oil and gas migration and accumulation mechanism characterization study of the models is achieved. In the simulation experiment process, simulation can be controlled by controlling pressure and flow, and the influence of filling pressure, outlet pressure and flow speed on oil and gas migration and accumulation can be controlled.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to a physical simulation system and an experimental method for oil and gas migration paths. Background technique [0002] The secondary migration of oil and gas underground occurs in different rock formations, so the configuration relationship between rocks is the primary geological factor affecting oil and gas migration. Different rock assemblage structures will lead to different hydrocarbon migration paths and hydrocarbon migration and accumulation results. At the same time, the migration of oil and gas occurs along a limited path within the channel, so it can be seen that the secondary migration of oil and gas is a process of non-uniform flow. Among them, the distribution of formation morphology, the configuration relationship between formation rocks and the strength of formation pressure are crucial to the study of the heterogeneity p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
Inventor 陈中红黄伟孙滕奎
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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