Determining method for stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve

A measurement method, a technique for high pressure gas, used in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc.

Active Publication Date: 2014-03-19
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it still uses the traditional steady-state method to test the relative permeability of gas and water.

Method used

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  • Determining method for stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve
  • Determining method for stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve
  • Determining method for stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve

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Embodiment Construction

[0062] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

[0063] Such as figure 1 As shown, the device used in the formation high-temperature and high-pressure gas-water phase permeability curve determination method includes an injection system, a constant temperature box 8, a core holder 6, a confining pressure pump 7 and a back pressure system. The injection system includes an injection pump 1. Two intermediate containers and an air-water balancer 4, the two intermediate containers are respectively the intermediate container for gas samples 2 and the intermediate container for water samples 3, and the injection pump 1 passes through the pipeline and the intermediate container for gas samples 2 and the intermediate container for water samples respectively One end of 3 is connected, the outlet pipe of injection pump 1 is provided with a pressure gauge, the ...

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Abstract

The invention discloses a determining method for a stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve. The determining method comprises the following steps: S1, preparing a rock core; S2, preparing fluid; S3, carrying out a single separation test on balance gas and balance stratum water; S4, saturating the rock core with water; S5, carrying out a connecting flow and raising the temperature to generate a pressure; S6, carrying out a balance water-phase permeability Kw test; S7, carrying out a gas-driving-water process relative permeability test; S8, correcting an accumulated water yield amount W(t) and an accumulated gas yield amount G(t); converting a value recorded under a ground condition to a stratum condition; and S9, calculating a water-phase relative permeability rate Krw and a gas-phase relative permeability rate Krg at each moment, and a gas-containing saturation degree (Sge) of a rock sample outlet end face. The determining method for the stratum high-temperature high-pressure gas-phase and water-phase relative permeability curve has the beneficial effects that high-temperature and high-pressure conditions of a real gas deposit stratum are effectively simulated and the influences on rocks and the fluid by the high-temperature and high-pressure conditions of the stratum are sufficiently considered; a determined result meets the actual production and the usable value of experimental data is high; the disadvantages in an existing determining method are overcome.

Description

technical field [0001] The invention relates to a method for measuring high-temperature and high-pressure gas-water phase permeability curves of formations in the technical field of petroleum and natural gas exploration and development. Background technique [0002] Gas-water phase permeability is an important basic data in the development of gas fields. The current standard practice of gas-water phase permeability testing is to use compressed air under laboratory temperature conditions according to the standard SY / T5345-2007 "Measurement method for relative permeability of two-phase fluid in rocks". Or nitrogen and formation water (injected water) or standard brine are measured by steady-state method or unsteady-state method. The existing measurement methods do not consider the influence of rock and fluid under high temperature and high pressure conditions in the formation, and cannot realize the gas-water viscosity ratio and interfacial tension under the formation conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 郭平方建龙杜建芬汪周华罗玉琼赵春兰董超熊燏铭郑鑫平何佳林涂汉敏李洋
Owner SOUTHWEST PETROLEUM UNIV
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