Dynamic shale pore pressure transmission tester

A technology of pore pressure and experimental equipment, which is applied in the direction of measuring equipment, suspension and porous material analysis, scientific instruments, etc., to achieve the effect of convenient operation and reasonable structure

Active Publication Date: 2012-10-03
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the influence of the difference ΔP between the fluid column pressure and the pore pressure in the well, drilling fluid properties, physical and chemical effects of drilling fluid / rock, and shale permeability on fluid migration. lack of analysis

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  • Dynamic shale pore pressure transmission tester

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0022] Such as figure 1 As shown, the dynamic shale pore pressure transmission experimental device of the embodiment of the present invention mainly includes a core holder 10, an ISCO pump 1, an automatic confining pressure tracking pump 17, a vacuum pump 18, a mechanical booster pump 24, a high-pressure gas source 16, a second An upstream piston container 5, a second upstream piston container 6 and a downstream piston container 23 and so on.

[0023] The core holder 10 includes an upstream working chamber, a downstream working chamber, a perforated plate, etc., and the core ...

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Abstract

The invention discloses a dynamic shale pore pressure transmission tester, which overcomes the defect that physicochemical effects such as properties of drilling fluid and influences of shale permeability and the like on fluid migration are not effectively analyzed currently. In the tester, a core holding unit comprises an upstream workroom and a downstream workroom, a confining pressure automatic tracking pump is connected to the core holding unit through a pipeline, a downstream piston container and a vacuum pump are connected to the downstream workroom of the core holding unit through a shared pipeline, an outlet end of a first upstream piston container and an outlet end of a second upstream piston container are connected with the upstream workroom of the core holding unit through a shared pipeline, and return pressure is provided for an end surface of the core holding unit by a high pressure air source; and the downstream piston container is connected with a mechanical booster bump, and the vacuum pump is connected to a pipeline between the core holding unit and the downstream piston container. According to the device disclosed by the invention, the influence of fluid on the efficiency of shale semi-permeable membranes can be studied.

Description

technical field [0001] The invention relates to a dynamic shale pore pressure transmission analysis technology, in particular to a dynamic shale pore pressure transmission experimental device. Background technique [0002] Wellbore instability caused by shale pressure transfer is a difficult research problem in oil and gas well engineering. Its mechanism of action and its main controlling factors are one of the basic topics that are urgently studied in the field of oil and gas exploration and development. [0003] The rate of fluid migration (filtration) in shale depends on the difference ΔP between the fluid column pressure and pore pressure in the well, the properties of the drilling fluid, the permeability of the wellbore rock, and the physicochemical / mechanical interaction between the drilling fluid / rock, etc. And other factors. Due to the low permeability of mud shale and low hydraulic conductivity, the change of pore pressure cannot be transmitted out quickly, so as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 王健胡进军刘罡夏小春孙强耿铁项涛
Owner CHINA NAT OFFSHORE OIL CORP
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