Method for testing influence to leakage stoppage effect of resin grain size to ultra-absorbent resin
A technology of water-absorbing resin and resin pellets, applied in the direction of using stable tension/pressure to test material strength, fluid tightness test, machine/structural component test, etc., can solve problems such as loss, leakage, formation cracks, etc. Simple test steps and high test accuracy
Inactive Publication Date: 2012-05-23
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Problems solved by technology
According to incomplete statistics, domestic reserves of fractured and complex formations account for about 50% of the total reserves, but due to the development of formation fractures and holes, the problem of leakage is difficult to solve, and the resulting losses are extremely serious
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[0028] The present invention relates to a method for testing the effect of resin particle size on plugging effect of superabsorbent resin, the specific steps of which are as follows:
[0029] (a) Prepare a superabsorbent resin sample for subsequent use;
[0030] (b) select a certain amount of superabsorbent resin samples with different resin particle sizes respectively;
[0031] (c) Superabsorbent resin samples with different resin particle sizes are mixed with well fluid plugging agent respectively and injected into cores with the same core sand particle diameter;
[0032] (d) Record the plugging time and leakage volume, wait for it to stop leaking, let it stand for a period of time, and then measure the pressure bearing capacity;
[0033] (e) According to the measured plugging time, leakage volume and pressure bearing capacity, analyze the influence of resin particle size on plugging effect of super absorbent resin, and then determine the optimal resin particle size.
[00...
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Abstract
The invention discloses a method for testing influence to leakage stoppage effect of resin grain size to ultra-absorbent resin. The method comprises the steps of: selecting ultra-absorbent resin samples with different resin grain sizes; respectively injecting the ultra-absorbent resin samples with different resin grain sizes into cores with same core grain diameters; recording leakage stoppage time and leaking quantity, then measuring a pressure-bearing capacity; and analyzing the influence of the resin grain size to the leakage stoppage of the ultra-absorbent resin according to the measured stoppage time, the leaking quantity and the pressure-bearing capacity, and further determining an optical resin grain size. The method can be used for rapidly measuring the influence to the leakage stoppage effect of the resin grain size to the ultra-absorbent resin, has the advantages of high measurement precision and simple measurement steps, and provides a theoretical basis for the ultra-absorbent resin applied to the leakage stoppage.
Description
technical field [0001] The invention relates to a method for testing the influence of resin particle size on the plugging effect of superabsorbent resin. Background technique [0002] Drilling fluid loss is a common downhole complication in drilling operations. Lost circulation can occur in shallow, medium and deep formations, and can also occur in formations of different geological ages, and may occur in formations of various lithologies. Some lost circulations are just a slow drop in the liquid level of the mud pool, while others have no entry but no exit. Once a loss occurs, it will not only delay the drilling operation time, prolong the drilling cycle, lose drilling fluid, damage oil and gas layers, and interfere with geological logging work, but also It may also cause a series of complex situations and accidents such as well collapse, drill sticking, and blowout, and even lead to the scrapping of the wellbore, resulting in major economic losses. Therefore, the occurre...
Claims
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IPC IPC(8): G01N33/44G01N3/08G01M3/00E21B33/13
Inventor 常萍
Owner 常萍