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Oil-displacement foam system evaluation device and evaluation method thereof

A foam system and evaluation device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of large measurement errors and single evaluation gas, and achieve the effects of avoiding pressure fluctuations, reducing measurement errors, and avoiding dead volume

Pending Publication Date: 2020-01-24
PETROCHINA CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of single evaluation gas and large measurement error in the above-mentioned prior art, and provide a foam system evaluation device and evaluation method for oil displacement

Method used

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  • Oil-displacement foam system evaluation device and evaluation method thereof

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Embodiment 1

[0039] The oil reservoir conditions in Wuliwan Block 1 of Changqing Oilfield are as follows: reservoir temperature 54°C, formation pressure 14.7MPa, foaming agent fatty alcohol polyoxyethylene ether sodium sulfate, and foaming gas medium: nitrogen The performance evaluation method of the foam system is as follows :

[0040] 1) Experiment preparation

[0041] Prepare 200mL of fatty alcohol polyoxyethylene ether sodium sulfate foaming agent solution with a mass concentration of 0.4% by using the water injected in Wuliwan District 1, and select a nitrogen cylinder with a pressure of 18MPa and a capacity of 8L as the gas source, with a diameter of 3cm and an aperture of 2μm. A quartz sintered plate acts as a foamer. According to the flow of the connection device shown in Embodiment 1, the pressure relief pipeline 25 of the back pressure valve and the vent pipeline 24 are connected to the outdoor. Start the pressure test to check the airtightness of the device.

[0042] 2) Foam ...

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Abstract

The invention discloses an oil-displacement foam system evaluation device and an evaluation method thereof, and belongs to the field of oilfield development. According to the oil-displacement foam system evaluation device, a transparent window and a graduated scale are arranged on a cavity wall; a temperature control device is arranged on the periphery of the cavity wall; a temperature sensor is arranged in a cavity; a cavity top cover is arranged on the top of the cavity; a second rapid connection head is arranged on the cavity top cover; a foam generator and a cavity bottom cover are arranged at the bottom of the cavity; a first rapid connection head is arranged on the cavity bottom cover; a gas source is respectively connected with a first four-way valve and the first rapid connection head through a first three-way valve; pipelines among the above parts are each provided with a needle valve; another three joints of the first four-way valve are respectively connected with the secondrapid connection head, a back pressure control system and a first pipeline; the first pipeline is an escape pipe; and pipelines among the above parts are each provided with a needle valve. By means ofthe oil-displacement foam system evaluation device in the invention, dead volume of foam liquid and generation of an observation blind hole are effectively avoided; the measurement error is reduced;and furthermore, multiple gases can be evaluated.

Description

technical field [0001] The invention belongs to the field of oilfield development, in particular to a foam system evaluation device for oil displacement and an evaluation method thereof. Background technique [0002] As an effective production stimulation technique, foam flooding is widely used in oil fields to enhance oil recovery. The foam used in foam flooding includes gas (air, nitrogen, carbon dioxide, hydrocarbon gas, etc.), water and foam. In the research of foam flooding technology, the screening and evaluation of foam system is one of the core contents of foam flooding technology research. [0003] At present, the mainstream evaluation methods of foam system for oil displacement are Ross-Miles method and Warning Blender method. Although the above methods can qualitatively evaluate the basic performance of foam system to a certain extent, due to the limitation of the evaluation equipment, it is impossible to simulate the reservoir. Under high temperature and high pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 范伟熊维亮李姝蔓赵继勇王永宏张永强朱圣举余光明王靖华刘蕾王丽莉张皎生张庆洲段文标曾山
Owner PETROCHINA CO LTD
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