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Method for characterization research of depth fluid flowing diverting agent in oil field

A liquid flow diversion and oil reservoir technology, which is applied in earthwork drilling, wellbore/well components, measuring devices, etc., can solve the problem that it is difficult to make cores with fractures or large pores, experimental phenomena cannot be seen, and deep liquid flow diversion agents cannot Injection and other issues

Active Publication Date: 2012-07-18
PETROCHINA CO LTD
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Problems solved by technology

[0011] The problem with this method is that it is difficult to make cores with fractures or large pores with the same parameters. The experimental process is complicated, and the experimental phenomena are invisible. Under most conditions, there will be a problem that the deep liquid flow diverting agent cannot be injected.

Method used

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  • Method for characterization research of depth fluid flowing diverting agent in oil field
  • Method for characterization research of depth fluid flowing diverting agent in oil field
  • Method for characterization research of depth fluid flowing diverting agent in oil field

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The large pore simulation visual model test device of the oil reservoir includes: a piston container with magnetic stirring, a visual model of the large pore simulation of the oil reservoir, a video camera, and a measuring cylinder.

[0045] The outlet of the oil reservoir large pore simulation visual model 1 is set at the upper side, connected with the stainless steel pipe 4, the measuring cylinder 5 is placed at the outlet of the stainless steel pipe 4, and the inlet of the oil reservoir large pore simulation visual model 1 is set at the lower side, made of stainless steel The tube 3 communicates with the piston container 8 with magnetic stirring, and the camera 6 is set on the side of the oil reservoir large pore simulation visual model 1 with the optical glass 2. The pressure sensor is connected to the pipeline 10 at the bottom of the piston container 8 with magnetic stirring, and then connected to the pressure sensor 11. The top is in communication with the distille...

Embodiment 2

[0074] One of the important issues in the application of granular deep liquid diversion agents is injectability. In the indoor simulation of long-term water flooding in the reservoir, the visual model of mm-level large pores and large pores combined with different pore-throat sizes was produced, and the injectability test was carried out.

[0075] The blockage pressure, breakthrough pressure and flow of flexible diverting agent (SR-3) in large formation pores are related to formation fluid velocity, pore size, particle size and strength of flexible diverting agent (SR-3). In order to study the flow, clogging, deformation and migration performance of flexible diverting agents in large pores, a series of visual simulation models of reservoir large pores with different pore-throat size combinations were developed and processed (see Fig. 3- Figure 7 ). The surface of the model is 10mm thick optical glass, channels and holes of different sizes are carved on the stainless steel su...

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Abstract

The invention relates to a method for carrying out characterization research on an indepth fluid diverting agent of an oil reservoir. An oil reservoir large pore canal stimulated visible model experiment device comprising a magnetic stirring piston vessel and an oil reservoir large pore canal stimulated visible model is used to fill a suspension solution of the indepth fluid diverting agent to the magnetic stirring piston vessel; distilled water as a displacement medium enters from an upper mouth and pushes an inbuilt piston to drive the indepth fluid diverting agent on the lower part to the oil reservoir large pore canal stimulated visible model through an enlarged conical channel; when the indepth fluid diverting agent passes through different types of large stimulated pore canals or porous medium simulated hypertonic belts in the oil reservoir, the pressure change and the outlet flow in the flowing process are mensurated with the help of a pressure sensor educed from an inlet of the oil reservoir large pore canal simulated visible model; simultaneously, the deformation process that the indepth fluid diverting agent blocks the large pore canal in the flowing process and passes through the large pore canal by creep deformation under the effect of pressure is shot by a video camera; and an action mechanism of the indepth fluid diverting agent in the large pore canal or the porous medium stimulated hypertonic belt is researched.

Description

technical field [0001] The invention relates to a method for studying the deformation, creep migration and accumulation plugging of a deep liquid flow diversion agent in a simulated large pore of an oil reservoir under visual conditions by means of a visual model for simulating a large pore of the oil reservoir. Background technique [0002] Many oilfields in my country have entered the stage of high water cut and high recovery. High permeability layers or large pores appear in water injection oil layers, which lead to ineffective circulation of injected water, and even polymer flooding channeling, causing a series of serious problems. After research, the injection of deep liquid flow diverting agent (pre-crosslinked bulky particles or flexible diverting agent (product code: SR-3)) [1] technology can solve the above problems [2～6] . [0003] Existing Research and Characterization Techniques for Deep Flow Diverting Agents [7] There are maximum passing pressure method and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00E21B49/00
Inventor 朱怀江罗健辉刘玉章熊春明
Owner PETROCHINA CO LTD
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