CN104267175A - Sand-suspending capacity testing method for sand-carrying fluid - Google Patents
Sand-suspending capacity testing method for sand-carrying fluid Download PDFInfo
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- CN104267175A CN104267175A CN201410551059.XA CN201410551059A CN104267175A CN 104267175 A CN104267175 A CN 104267175A CN 201410551059 A CN201410551059 A CN 201410551059A CN 104267175 A CN104267175 A CN 104267175A
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Abstract
The invention relates to a sand-suspending capacity testing method, applied to a sand-suspending capacity testing experiment for a sand-carrying fluid, for the sand-carrying fluid used in fracturing or sand prevention operations. The experiment is carried out according to the following steps: (a) preparing the sand-carrying fluid to be tested or a base fluid of the sand-carrying fluid to be tested; (b) under the condition of room temperature, measuring 500 milliliters of the prepared sand-carrying fluid or base fluid, adding the sand-carrying fluid or base fluid into an agitator, adjusting the rotation speed of the agitator, and maintaining the adjusted rotation speed; (c) in case of a thickened sand-carrying fluid, adding gravels into the sand-carrying fluid according to a certain volume ratio, agitating the mixture for 2 minutes, and pouring the sand-carrying fluid with the gravels into a 1,000-milliliter measuring cylinder; in case of a gel sand-carrying fluid, adding the gravels into the sand-carrying fluid according to a certain volume ratio, adding a cross-linking agent after uniform agitation, continuing to agitate until the liquid level is slightly raised, stopping agitation, and pouring the sand-carrying fluid with the gravels into the 1,000-milliliter measuring cylinder; (d) observing and recording the time required for all the gravels to settle down to the bottom of the container, and calculating the settling velocity. The experiment steps are the same as the steps for field operation, and the experiment results are more accurate.
Description
Technical field
The present invention relates to the sand-carrying agent technical field that underground fracture or sand control in oil exploitation use, particularly relate to sand-carrying agent and hang sand aptitude tests method.
Background technology
In field of petroleum exploitation oil producing operation, in order to improve oil well output, usually frac job is carried out to oil well.Frac job is silica sand or haydite, below describe in be called gravel, carry with sand-carrying agent and pump in formation fracture.In order to prevent unconsolidated sandstone formation from shaking out, sand control treatment is usually carried out in down-hole, and sand control treatment also will pump into down-hole by sand-carrying agent gravel.Also have a kind of fracturing sand control operation, it combines pressure break and sand control two kinds of technology, also needs gravel sand-carrying agent to carry pump into down-hole or enter stratum.No matter any operation, all requires that sand-carrying agent has and good takes grittiness energy.At present to sand-carrying agent take grittiness can evaluation mainly contain two kinds of modes, individual particle gravel slumping method and outstanding grittiness energy method of testing.The gravel slumping method of individual particle surveys the settling velocity of individual particle gravel in sand-carrying agent, but individual particle gravel slumping method does not reflect the characteristic that sand-carrying agent carries colony's gravel.Outstanding sand performance test methods the most frequently used is at present the gravel adding different sand ratio in sand-carrying agent under static state, survey the speed of its complete sedimentation, as Chinese patent, number of patent application 201210409896.X, applying date 2012.10.09, patent name " a kind of outstanding sand aptitude tests method of fracture polymer "; Another one patent, application number 201010531650.0, applying date 2010.10.25, denomination of invention " a kind of method of testing of outstanding grittiness energy of foam fracturing fluid used for coal bed gas "; Also has a patent, application number 201110290368.2, applying date 2011.09.14, denomination of invention " a kind of outstanding grittiness evaluation method of clean fracturing fluid ", these three patent documentations all disclosed in be the method for testing of under static state carrying out sand-carrying agent cobble-stone settling velocity.No matter which kind of method, owing to being test in a stationary situation, mulling is even not, causes gravel agglomerating, not easily disperses, and the accuracy of the settling velocity of gravel is surveyed in impact.Further, directly in the sand-carrying agent of gel-type, add gravel, also first add gravel with scene, after add crosslinking chemical actual job operation be not inconsistent, test result can not reflect actual conditions.
Summary of the invention
For solving the problems of the technologies described above, having invented sand-carrying agent and having hanged sand aptitude tests method, the method adopts dynamic method to test, and mulling is even, and there will not be agglomerating phenomenon, and experimental procedure is identical with site work step, experimental result is more accurate.
Present invention employs following technical scheme: sand-carrying agent hangs sand aptitude tests method, carries out according to the following steps:
A () configures sand-carrying agent to be measured, gel-type sand-carrying agent then only configures base fluid in this way;
Under (b) room temperature, measure sand-carrying agent that 300mL ~ 700 mL configures or base fluid is poured in stirrer, the whirlpool regulating rotating speed to the liquid of stirrer to be formed also can see propeller-blade axis top;
C () keeps stirrer constant revolution,
For densification type sand-carrying agent, add gravel by 10% ~ 100% volume ratio, stir 1min ~ 4min, pouring in 1000mL graduated cylinder containing gravel sand-carrying agent;
For gel-type sand-carrying agent, add gravel by 10% ~ 100% volume ratio, then add cross-linking agent solution by recipe requirements, be stirred to liquid level slightly protruding, stop stirring, pouring in 1000mL graduated cylinder containing gravel sand-carrying agent;
D () is observed and is recorded gravel and be all settled down to container bottom required time.
Compared with prior art, the invention has the beneficial effects as follows, this experimental technique is owing to being adopt dynamic method to test, and mulling is even, there will not be agglomerating phenomenon.And consider gel-type sand-carrying agent site work operation, in experiment, first in the sand-carrying agent base fluid of gel-type, add gravel, after add crosslinking chemical, this conforms to actual job operation, and test can reflect actual conditions, and result is more accurate.This assay method energy Quick Measuring makes the outstanding sand ability of fracture polymer, and testing procedure is simple, convenient operation.
Embodiment
Before explanation experimental technique of the present invention, first explain two nouns: densification type sand-carrying agent, gel-type sand-carrying agent.According to SY/T5185-2008 gravpack water-base carrier fluid method of evaluating performance, sand-carrying agent is divided into densification type sand-carrying agent and gel-type sand-carrying agent.Densification type sand-carrying agent is in spreading agent, add the formulated sand-carrying agent of viscosifying agent.Gel-type sand-carrying agent is the sand-carrying agent with crosslinking chemical, base fluid being cross-linked into frozen glue shape.Due in site work process, the outfit of densification type sand-carrying agent and gel-type sand-carrying agent with add sand operation and there are differences, in order to test structure more accurately and reliably, experimental procedure simulated field flow chart of the present invention.
For densification type sand-carrying agent, its outstanding sand aptitude tests method is carried out according to the following steps:
A () configures sand-carrying agent to be measured;
Under (b) room temperature, measure sand-carrying agent that 500 mL configure and pour that Wu Yin is mixed to be adjusted in device into, regulate the rotating speed of stirrer to liquid to form whirlpool and propeller-blade axis top can be seen;
C () keeps stirrer constant revolution, add gravel by 10% volume ratio, stirs 2min, pouring in 1000 mL graduated cylinders containing gravel sand-carrying agent;
D () is observed and is recorded gravel and be all settled down to container bottom required time.
Test different sand than under the gravel slumping time, repeat step (a) ~ (d), the sand ratio wherein in step (c) is respectively 20%, 30%, 40%, 50%, 75%, 100%.
For gel-type sand-carrying agent, its outstanding sand aptitude tests method is carried out according to the following steps:
E () configures sand-carrying agent base fluid to be measured;
Under (f) room temperature, measure sand-carrying agent base fluid that 500 mL configure and pour that Wu Yin is mixed to be adjusted in device, the whirlpool regulating rotating speed to the liquid of stirrer to be formed also can see propeller-blade axis top into;
G () keeps stirrer constant revolution, add gravel, then add cross-linking agent solution by recipe requirements, be stirred to whirlpool disappearance liquid level slightly protruding by 10% volume ratio, stops stirring, pouring in 1000 mL graduated cylinders containing gravel sand-carrying agent;
H () is observed and is recorded gravel and be all settled down to container bottom required time.
Test different sand than under the gravel slumping time, repeat step (e) ~ (h), the sand ratio wherein in step (g) is respectively 20%, 30%, 40%, 50%, 75%, 100%.
" liquid level is slightly protruding " described in above-mentioned experimental procedure (g), can reference standard number be: SY/T5107-2008, title be 6.4 in " aqueous fracturing fluid method of evaluating performance ": the test of fracturing liquid crosslinking time.
Above-mentioned experiment, except Wu Yin mixed tune device, can certainly use the stirrer of other type, as long as the object reaching fully mixing sand-carrying agent and gravel just can.
The amount adding sand-carrying agent in stirrer or its base fluid can fully be stirred sand-carrying agent with the leaf oar of stirrer and is as the criterion, can not very little, can not be too many, very little the leaf oar of stirrer stir less than, too many inconvenient operation, is generally advisable with 300mL ~ 700 mL.
Testing gravel used is generally silica sand or haydite, and its particle diameter is 0.425mm ~ 0.850mm.
Embodiment as herein described is only exemplary embodiments, but is not limited only to these embodiments, and those skilled in the art can not depart from spirit of the present invention and make amendment under enlightening.A lot of change, combination and amendment may be there is in scheme disclosed herein; and all within the scope of the invention, therefore, protection domain is not limited only to explanation above; but define according to claim, protection domain comprises all equivalents of the target of claim.
Claims (6)
1. sand-carrying agent hangs sand aptitude tests method, carries out according to the following steps:
A () configures sand-carrying agent to be measured, gel-type sand-carrying agent then only configures base fluid in this way;
Under (b) room temperature, measure sand-carrying agent that 300mL ~ 700 mL configures or base fluid is poured in stirrer, the whirlpool regulating rotating speed to the liquid of stirrer to be formed also can see propeller-blade axis top;
C () keeps stirrer constant revolution,
For densification type sand-carrying agent, add gravel by 10% ~ 100% volume ratio, stir 1min ~ 4min, pouring in 1000mL graduated cylinder containing gravel sand-carrying agent;
For gel-type sand-carrying agent, add gravel by 10% ~ 100% volume ratio, then add cross-linking agent solution by recipe requirements, be stirred to liquid level slightly protruding, stop stirring, pouring in beaker containing gravel sand-carrying agent;
D () is observed and is recorded gravel and be all settled down to container bottom required time.
2. sand-carrying agent according to claim 1 hangs sand aptitude tests method, it is characterized in that, step (b) measures sand-carrying agent that 500 mL configure or base fluid is poured in stirrer.
3. sand-carrying agent according to claim 1 hangs sand aptitude tests method, it is characterized in that, step (c) be by 10%, 20%, 30%, 40%, 50%, 75%, 100% volume ratio add respectively gravel carry out testing different sand than under settling time.
4. sand-carrying agent according to claim 1 hangs sand aptitude tests method, it is characterized in that, for densification type sand-carrying agent in step (c), mixing time is 2min.
5. sand-carrying agent according to claim 1 hangs sand aptitude tests method, it is characterized in that, described stirrer is Wu Yin mixed tune device.
6. sand-carrying agent according to claim 1 hangs sand aptitude tests method, it is characterized in that, described gravel is silica sand or haydite, and its particle diameter is 0.425mm ~ 0.850mm.
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Cited By (4)
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| CN104990906A (en) * | 2015-07-14 | 2015-10-21 | 中国华能集团清洁能源技术研究院有限公司 | System and method for testing sand carrying capacity of fracturing fluid |
| CN106680038A (en) * | 2017-01-03 | 2017-05-17 | 南京林业大学 | Stratified sampling device and method used for determining sand suspension capability of sludge and measuring method for stratified sampling |
| CN109211912A (en) * | 2018-08-02 | 2019-01-15 | 西南石油大学 | A kind of foam fracturing fluid prop-carrying capacity evaluating apparatus and working method |
| CN111999224A (en) * | 2020-08-28 | 2020-11-27 | 陕西延长石油（集团）有限责任公司 | Fracturing fluid dynamic sand suspension performance testing device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104990906A (en) * | 2015-07-14 | 2015-10-21 | 中国华能集团清洁能源技术研究院有限公司 | System and method for testing sand carrying capacity of fracturing fluid |
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| CN109211912A (en) * | 2018-08-02 | 2019-01-15 | 西南石油大学 | A kind of foam fracturing fluid prop-carrying capacity evaluating apparatus and working method |
| CN111999224A (en) * | 2020-08-28 | 2020-11-27 | 陕西延长石油（集团）有限责任公司 | Fracturing fluid dynamic sand suspension performance testing device and method |
| CN111999224B (en) * | 2020-08-28 | 2023-09-29 | 陕西延长石油（集团）有限责任公司 | Fracturing fluid dynamic sand suspension testing device and method |
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Application publication date: 20150107 |