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Core simulated sand-filled pipe device and filling method

A technology for simulating cores and sand-packing pipes, applied in earthwork drilling, production fluids, boreholes/well components, etc., which can solve end face plugging, reduce continuous gel displacement and plugging effects, and fail to simulate actual injection conditions, etc. problem, to achieve the effect of improving displacement and plugging effect, reducing plugging and shearing

Pending Publication Date: 2019-01-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the continuous gel displacement process of the existing sand-packing pipe device for simulating rock, the end face is clogged due to the existence of the dense screen, which cannot simulate the actual injection situation. This reduces the displacement and plugging effect of the continuous gel, which makes the experimental results different from the actual injection. At present, there is no simple and easy-to-operate sand-packing tube core filling method to solve the problem of end face plugging and shearing. all questions

Method used

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  • Core simulated sand-filled pipe device and filling method
  • Core simulated sand-filled pipe device and filling method

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Experimental program
Comparison scheme
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Embodiment 1

[0043] The embodiment of the present invention provides a sand filling pipe device for simulating a rock core, and its structural schematic diagram is as follows figure 1 As shown, it mainly includes a sealing cover and a sand filling pipe 2, wherein,

[0044] The sealing cover includes a first sealing cover 1 and a second sealing cover 3, the first sealing cover 1 is set on the first end of the sand filling pipe 2, and the second sealing cover 3 is set on the second end of the sand filling pipe 2;

[0045] The first sealing cover 1 is provided with a first through hole 1-1 for injecting fluid into the sand filling pipe 2;

[0046] The second sealing cover 3 is provided with a second through hole 3-1 for discharging the fluid in the sand filling pipe 2,

[0047] The sand packing pipe 2 includes a pipe string body 2-1 and a pipe section 2-2 extending outward from one end of the pipe string body 2-1 with a gradually increasing pipe diameter. The port of the pipe section 2-2 is ...

Embodiment 2

[0060] The embodiment of the present invention provides a filling method of a simulated core sand filling pipe, which can be used in different regional conditions for filling based on the simulated core sand filling pipe device. The third district and Gangdong first district are taken as examples, the flow chart of the method is as follows figure 2 As shown, the details are as follows:

[0061] Step 101: Connect and seal the first sealing cover and the first end of the sand filling pipe.

[0062] Specifically, the first sealing cap is aligned with the first end of the sand packing pipe and the first sealing cap is rotated. At the same time, the first hole plug is inserted into the first through hole to ensure the tightness between the first sealing cap and the sand packing pipe. It is sealed to ensure that the inside of the sand filling pipe is not connected with the outside world.

[0063] Step 102: inject the first quartz sand of the first preset mesh into the sand fillin...

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Abstract

The invention discloses a core simulated sand-filled pipe device and a filling method, and belongs to the technical field of oil field oil recovery enhancing. According to the core simulated sand-filled pipe device, a pipe section which extends from one end of a string body and has the gradually increasing pipe diameter is arranged on the string body of a sand-filled pipe; the pipe section is filled with of first quartz sand with a first preset mesh number, second quartz sand with a second preset mesh number and third quartz sand with a third preset mesh number in sequence to form a first quartz sand layer, a second quartz sand layer and a third quartz sand layer; the string body is filled with formation sand to form a formation sand layer; and an interface is formed between the formationsand layer and the third quartz sand layer. The formed first quartz sand layer, the second quartz sand layer and the third quartz sand layer can be used for replacing a dense screen cloth, and the interface is used for replacing the end face of the sand-filled pipe, so that the blocking and shearing to continuous gel are reduced in the injecting process of the continuous gel, and the displacementand plugging effect of the continuous gel is improved.

Description

technical field [0001] The invention belongs to the technical field of oil field enhanced oil recovery, and in particular relates to a sand filling pipe device and a filling method for simulating rock cores. Background technique [0002] Sand-packed tube core displacement experiment is a commonly used EOR experiment method in China at present. This method can use the method of approximately simulating the formation permeability, porosity and other parameters in the experimental area to conduct core displacement experiments. After the experiment is completed, it can be The formation sand in the core of the sand-filling pipe is taken out and refilled again to save the cost of the experiment. [0003] At present, the sand-filling pipe device of the conventional simulated rock core is a straight cylinder. In order to prevent the formation sand from overflowing at both ends of the sand-filled pipe device of the simulated rock core, dense filter screens are arranged on both ends o...

Claims

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Application Information

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IPC IPC(8): E21B43/16E21B49/00
CPCE21B43/16E21B49/00
Inventor 郭志强熊英葛红江许红恩雷齐玲田继东宋阳坤程静马超
Owner PETROCHINA CO LTD
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