Method for detecting oil/water split-phase seepage flow resistance gradient

A detection method and gradient technology, applied in the field of reservoir physics research, can solve the problems of inability to distinguish the oil phase seepage resistance gradient and water phase seepage resistance gradient

Inactive Publication Date: 2007-04-11
中国石化股份胜利油田分公司地质科学研究院
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Problems solved by technology

[0004] The present invention proposes a new experimental detection scheme for the problem that the traditional method cannot distinguish between the oil-phase seepage resistance gradient and the water-phase seepage resistance gradient when oil-water co-seepage occurs

Method used

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  • Method for detecting oil/water split-phase seepage flow resistance gradient
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  • Method for detecting oil/water split-phase seepage flow resistance gradient

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Experimental program
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Embodiment

[0040] 1. Prepare the core sample and the corresponding oil and water samples, and prepare the experimental device according to Figure 1.

[0041] Experimental core: The core used in this example is Niu4-11 / 31, and the core parameters are shown in Table 1.

[0042]

Rock core number

Length(cm)

Diameter (cm)

Air permeability

(10 -3 um 2 )

Cow 4-11 / 31

4.990

2.540

6.78

[0043] Experimental water: 3% KCL aqueous solution, density 0.9992g / cm 3 , The viscosity is 1mPa.s at room temperature (22°C).

[0044] Experimental oil: It is made up of kerosene and white oil, with a density of 0.8537g / cm at room temperature 3 , The viscosity is 1.15mPa.s.

[0045] 2. Experimental determination steps

[0046] (1) By controlling the pump speed, keeping the oil speed constant at 0.0015mL / min, carry out displacement experiments with different water speeds (water speeds are: 0.0015, 0.004, 0.012, 0.023, 0.038, 0.114, 0.228 mL / min) Afte...

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Abstract

The present invention is experiment and detection method of oil / water phase splitting seepage resistance gradient and belongs to the field of reservoir physics research. Based on generalized seepage description theory, the flow state of any one differential linear seepage section in non-linear seepage curve may be described with the linear equation the present invention gives. The present invention proposes method of detecting oil / water phase splitting seepage resistance gradient, and by means of the method, seepage resistance gradient for the fluid phase in some flow rate and in certain conditions may be determined. The method of the present invention has the features of being simple, fast and accurate.

Description

Technical field [0001] The invention belongs to the field of oil layer physics research, and relates to an experimental measurement method for the phase separation resistance gradient of oil-water two-phase seepage, that is, it can distinguish between the oil-phase seepage resistance gradient and the water-phase seepage resistance gradient during the oil-water two-phase seepage. Background technique [0002] In the classic DARCY law of seepage theory, the seepage resistance of the fluid is ignored. As long as there is displacement power, the fluid will flow in the reservoir. In recent years, domestic and foreign studies have found that in the process of oil-water seepage, especially in low-permeability reservoirs, the seepage resistance has a great influence on the movement of oil and water underground. As we all know, objects are subject to resistance during movement. Like the movement of objects, when oil-water two-phase seepage, fluids of different phases (i.e. oil and water) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04G01N33/00G06F19/00
Inventor 孙焕泉周涌沂王端平刘显太李振泉杨耀忠时佃海
Owner 中国石化股份胜利油田分公司地质科学研究院
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