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Experimental facility and experimental method for evaluating steam reforming feature of reservoir rock

A technology of characteristic evaluation and experimental equipment, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc.

Active Publication Date: 2013-12-18
PETROCHINA CO LTD
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Problems solved by technology

[0004] At present, there is no systematic method and device for the visual evaluation of the transformation and dissolution characterization process of different types of reservoir rocks by high temperature and high pressure steam

Method used

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  • Experimental facility and experimental method for evaluating steam reforming feature of reservoir rock
  • Experimental facility and experimental method for evaluating steam reforming feature of reservoir rock

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Embodiment Construction

[0046] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0047] Such as figure 1 , figure 2 As shown, the present invention proposes an experimental device 100 for evaluating the rock characteristics of steam reformed reservoirs. The experimental device 100 includes: a model system 1, a steam injection system 2, a steam extraction system 3, a confining pressure control system 4, and an Control system 5, vacuum system 6, fluid analysis system 7 and image acquisition and analysis system 8;

[0048] The model system 1 is composed of a holder 11 fixedly arranged in a hyperbaric chamber 13 and a rock core 12 arranged in the holder 11; as figure 2 As shown, in this embodiment, the holder 11 is placed vertically, and the holder 11 includes a cylindrical main body 111, and the upper and lo...

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Abstract

The invention relates to an experimental facility and an experimental method for evaluating steam reforming feature of reservoir rock. The experimental facility comprises a model system, a steam injection system, a steam recovery system, a confining pressure control system, an overburden pressure control system, a vacuum pumping system, a fluid analysis system and an image acquisition and analysis system. Steam is injected from a steam chamber to provide a high-temperature high-pressure contact environment for the overall-diameter core bottom subjected to coring actually, a steam monitoring chamber provides an actual oil reservoir overburden pressure to simulate reforming effect of steam to an upper core pore structure of a steam injection well and dissolution to intercalation core during the actual process of injecting steam into oil reservoirs. Core top fluid in the steam monitoring chamber is sampled and analyzed, so that steam breakthrough conditions of different core samples are monitored in time. The core is scanned by means of industrial CT (computed tomography) imaging in time, so that dissolution and breakthrough conditions of the different core samples on different steam injection conditions are analyzed, and key operation parameters are provided for steam injection development of great quantities of inhomogeneous oil reservoirs developed from the intercalation.

Description

technical field [0001] The present invention relates to an experimental device and method for evaluating rock characteristics in the field of petroleum development, in particular to an experimental device and method for evaluating rock characteristics of steam-reformed reservoir rocks that can be used for high-temperature and high-pressure steam to describe and visually evaluate the characteristics of dissolution and transformation of different types of rocks . Background technique [0002] Affected by the continental sedimentary environment, the heterogeneity of heavy oil reservoirs in my country is generally strong, and a large number of interlayers are developed in the reservoirs. Among them, interlayers refer to parts of mudstone, siltstone, or calcareous mineral components. The interlayer has a certain permeability inside the interlayer, usually with a permeability of 1 to 0.0001×10 －3 um 2 . In the steam injection development process of heavy oil reservoirs, due to t...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B43/24
Inventor 吴永彬李秀峦王红庄赵欣
Owner PETROCHINA CO LTD
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