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Computed tomography (CT) scanning heterogeneous model testing system

A technology of CT scanning and model test, applied in measurement devices, analysis of suspensions and porous materials, scientific instruments, etc., can solve problems such as impermeability, and achieve the effect of simplifying test devices, excellent performance, and stable insulation

Active Publication Date: 2011-06-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the metal casing used by conventional core holders has a strong absorption of X-rays, making X-rays "impenetrable" to the metal casing, and the "artifacts" caused by radiation hardening, which affect the application of CT technology Main Factors in Homogeneity Studies

Method used

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  • Computed tomography (CT) scanning heterogeneous model testing system
  • Computed tomography (CT) scanning heterogeneous model testing system
  • Computed tomography (CT) scanning heterogeneous model testing system

Examples

Experimental program
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Embodiment 1

[0021] Embodiment 1 CT scanning intralayer heterogeneity model test system

[0022] Such as figure 1 As shown, the intralayer heterogeneous model test system consists of CT scanning system F, displacement system A, confining pressure system B, pressure measurement system C, core holder D and metering system E.

[0023] CT scanning system F can use a conventional medical CT scanning system, such as GE LightSpeed ​​8 multi-slice helical scanning system, the minimum scanning slice thickness is 0.625mm, the maximum scanning voltage is 140kV, and the accuracy of saturation measurement is 1%.

[0024] Displacement system A consists of two high-pressure metering pumps, which can deliver two fluids at the same time, and are the power source for displacement. Flow rate range: 0.001-15ml / min, maximum pressure: 70MPa.

[0025] The confining pressure system B consists of pumps, such as JB-800 pump group, which are used to add confining pressure to the core holder and core to simulate th...

Embodiment 2

[0030] Example 2 CT scan evaluation experiment of water flooding efficiency of heterogeneous model in layer

[0031] Firstly, three natural oil reservoir cores collected from different depths were taken to make cuboid single-layer core models with the same specifications. Measure the porosity and air permeability of each single-layer core model respectively; saturate each single-layer core with formation water, and measure the water-phase permeability respectively; then carry out oil flooding on each single-layer core respectively, and measure the oil permeability after reaching the state of bound water; The effective permeability of the facies and calculate the irreducible water saturation of each monolayer core.

[0032] The rock cores of each layer containing irreducible water are placed in the rock core chamber of the rock core holder of the system described in Example 1 according to the anti-rhythm arrangement; the rock core upper and lower plugs and upper and lower fixin...

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Abstract

The invention relates to a computed tomography (CT) scanning heterogeneous model testing system. The system comprises a CT scanning system, a displacement system, an overburden pressure system, a pressure measurement system, a heterogeneous multilayer core clamp holder and a metering system, wherein the heterogeneous multilayer core clamp holder consists of a shell, a rubber cylinder, a core left plug, a core right plug, a left fixing sleeve, a right fixing sleeve, a left fastening sleeve, a right fastening sleeve and a fixed bracket; the core right plug is provided with a plurality of liquid outlets; each liquid outlet is respectively aligned with one layer of core model; and a strip liquid outlet sealing gasket is formed on the core right plug, which correspond to a seam between two adjacent layers of core models, so that liquid flow passing through each layer of core model flows out from the corresponding liquid outlet of each layer of core model, and thus, intraformational heterogeneous water displacing oil layered measurement is realized. By the CT scanning system, the real-time on-line monitoring of the on-way distribution of saturation of fluid on each layer section in a heterosphere is realized so as to observe the interlayer communication phenomenon.

Description

technical field [0001] The invention relates to a test device for simulating combined injection and delamination mining in an oil field, in particular to a CT scanning heterogeneity model test system. Background technique [0002] CT technology has developed rapidly and has been widely used in core analysis, core heterogeneity measurement, core sample selection, fracture quantitative analysis, online saturation measurement, flow experiment research, etc. as a conventional testing technology in core analysis. Visually characterize the pore structure, heterogeneity, and remaining oil distribution of the rock through quantitative and image analysis of the physical properties of the rock; conduct visual research on the displacement process to deeply understand the oil recovery mechanism, monitor fluid distribution and channeling characteristics, and understand aggregation The impact of material flooding on increasing the swept volume and revealing the mechanism of formation dama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01N15/08
Inventor 吕伟峰张祖波严守国罗蔓莉刘庆杰
Owner PETROCHINA CO LTD
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