Water-plugging performance evaluation device for particulate water-plugging agents
An evaluation device and water blocking agent technology, which is applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., can solve the problems that affect the use, blockage, and complex structure of the water blocking performance evaluation device of granular water blocking agents, and achieve Simple structure, avoid clogging and prevent settlement
Active Publication Date: 2017-06-27
PETROCHINA CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The structure of the evaluation device provided by the prior art is complicated, and the number of transmission pipelines and valves is large. The granular water shutoff agent usually blocks the transmission pipeline and valves, which affects the use of the water shutoff performance evaluation device of the granular water shutoff agent.
Method used
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Examples
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Embodiment 1
[0058] The granular water shutoff agent used in this example is a commercially available pre-crosslinked granular water shutoff agent, and the data provided by the manufacturer shows that the shutoff rate of the water shutoff agent is 90%.
[0059] Step 1. Measure the permeability of water in the tubular sand pack model before plugging
[0060] Open the upper cover 3, take out the piston 4, inject clean water into the cylinder 2, and stop water injection when the liquid level in the cylinder 2 reaches 1 / 2 of the total height of the cylinder 2. Then, put the piston 4 back into the cylinder 2, move the piston 4 downward, extrude the air in the lower chamber of the cylinder 2, and make the air pass through the first air release hole 401 and the second air release hole 401 of the piston 4 in sequence. Hole 402 flows out. As the piston 4 continues to move downward, when there is no more air flowing out of the second air release through hole 402, tighten the plug 5 at the top of th...
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Abstract
The invention discloses a water-plugging performance evaluation device for particulate water-plugging agents and belongs to the field of water-plugging agents. The device comprises a displacement pump, an injection pipeline, a pressure collector, a pipe type sand filling model, a cylinder body, an upper cover, a piston, a screwed plug and a stirrer, wherein an injection through hole is formed in the top of the upper cover, so as to connect the injection pipeline; the pressure collector is connected with the injection pipeline, so as to collect injection pressure; a first deflation through hole is formed in a piston body, a second deflation through hole communicated with the first deflation through hole is formed in the top of the piston, and the screwed plug is used for blocking the second deflation through hole; the upper end of the cylinder body is in detachable sealed connection with the upper cover, the lower end of the cylinder body is in sealed connection with the pipe type sand filling model, the piston is arranged in the cylinder body in an axial sliding manner to divide an inner cavity of the cylinder body into an upper cavity body and a lower cavity body, and the lower cavity is filled with the particulate water-plugging agents; the stirrer is arranged at the bottom of the cylinder body and is used for stirring the particulate water-plugging agents. According to the device, the blockage of a conveying pipeline caused by the water-plugging agents can be effectively prevented.
Description
technical field [0001] The invention relates to the field of water shutoff agents, in particular to a water shutoff performance agent evaluation device for granular water shutoff. Background technique [0002] Water shutoff agent, such as granular water shutoff agent, is a kind of chemical agent commonly used in oil field production such as oilfield drilling plugging, water injection well profile control, and oil production well water shutoff. It can seal the target area to different degrees. To prevent oil and water leakage, adjust the water injection profile, etc. For granular water shutoff agents, their water shutoff performance directly affects water shutoff, profile control and leakage plugging effects. In order to study the differences in water shutoff performance of different kinds of granular water shutoff agents, and provide the necessary screening basis for their use , it is necessary to evaluate the water shutoff performance of granular water shutoff agents. The...
Claims
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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 郑家朋覃孝平李良川郭吉清孙桂玲彭通路海伟邢丽洁周敏孙蓉
Owner PETROCHINA CO LTD