CN102998199A - Method for testing imbibing capability of leakage-proof plugging agent while drilling - Google Patents
Method for testing imbibing capability of leakage-proof plugging agent while drilling Download PDFInfo
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- CN102998199A CN102998199A CN 201110290381 CN201110290381A CN102998199A CN 102998199 A CN102998199 A CN 102998199A CN 201110290381 CN201110290381 CN 201110290381 CN 201110290381 A CN201110290381 A CN 201110290381A CN 102998199 A CN102998199 A CN 102998199A
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- leakage
- leak
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Abstract
The invention discloses a method for testing imbibing capability of a leakage-proof plugging agent while drilling. The method comprises the steps of (a) purifying and drying the leakage-proof plugging agent while drilling for future use; (b) weighing W1 g of the dried leakage-proof plugging agent while drilling and putting the dried leakage-proof plugging agent into a reaction container; (c) adding a liquid to be imbibed; (d) weighing an imbibed gel weight W2 after imbibing is saturated; and (e) calculating an imbibing rate of the leakage-proof plugging agent while drilling through a formula. With the adoption of the method, the imbibing capability of the leakage-proof plugging agent while drilling can be rapidly tested; the test precision is high, and the test steps are simple; and the test cost is greatly reduced.
Description
Technical field
The present invention relates to a kind of method of testing with boring the leak-proof sealing agent imbibition ability.
Background technology
Leakage is in the various borehole operation processes such as the drilling well of oil, natural gas exploration and development, well cementation, test or well workover, the fluid (comprising drilling fluid, grout, well completion fluid and other working fluid) of work is under the effect of pressure reduction, a kind of down hole problem of leakage in the stratum is one of the most general in the drilling engineering, modal technical barrier.Why claiming that it is a kind of down hole problem, is because its generation majority is not that the people causes, and independent of man's will, certainly, this saying is not accurate enough.If run into the leakage channel that can produce leakage, but taked corresponding effective measures, so just might not can produce leakage, can reduce widely the leakage degree at least.Secondly, even the existing micropore in stratum is unlikely the generation leakage, but when its some measures of taking are not suitable for physical condition, for example operation pressure surpasses the parting pressure on stratum, also can cause severe circulation loss, its visualize descends at ground mud tank liquid level, or wellhead drilling fluid returns output less than the normal discharge capacity of pump, or well head returns out without drilling fluid.
Leakage is one of down hole problem common in the drilling process, and it not only can expend rig time, loss mud, and might cause the series of complex situations such as bit freezing, blowout, well slough, even cause well to be scrapped, cause heavy economic losses.
Namely paid attention to the research of leakage Prevention Technique abroad as far back as the forties; To the fifties, about leakage mechanism and leak-proof leak-stopping research on mechanism, drop ply method of testing and leak-stopping technique technology all have larger development; Carried out lost circulation simulator and leakage research on mechanism 60～seventies, progressively grasped drop ply characteristics and the leakage rule in various leakages area, various blocking methods and leak-stopping technique reach its maturity, and the leak stopping success ratio obviously improves; Developed a series of compound leakage stop agents with reservoir protection effect 80～nineties, the leak stopping success ratio improves again; Paid attention to the theoretical research to leakage, high level has been arrived in the research and development of plugging test equipment, leak stoppage tool.
For improving the drilling well work efficiency, reduce the loss of the working fluids such as activity duration and mud, minimizing to the injury of reservoir etc. obtaining maximum economic benefit, plugging while drilling technique the method that provides that addresses this problem is provided, it is with boring with stifled a kind of leakage stopping technology in drilling engineering.
Drill-feeding plugging agent is domestic and international in recent years development, the good class New Kind of Plugging Agent of result of use.Existing with boring 801 lost circulation additives at present, it is the powder product that forms through the scientific approach complex treatment with multiple macromolecular compounds such as Chinese bandoline wood powder (a kind of timber that contains vegetable gum forms through pulverizing, and it contains cellulose, lignin, poly-pentose etc.), humate, carboxymethyl cellulose.The NFU lost circulation additive, it is composite and be equipped with powdery or the pelletized product that the inert material of different cultivars, different grain size, different dosages forms through scientific approach with multiple macromolecular compounds such as nanmu root powder (a kind of purpleback murdannia herb bushes tree root that contains vegetable gum forms through pulverizing), humic acid high-valency metal salt, starch sodium carboxymethyl, polyacrylamides.The NFDF8012 lost circulation additive, it is through composite powdery or the pelletized product that forms and form with addition of the inert material of difference amount, different grain size, different cultivars of scientific formula, scientific approach with multiple macromolecular compounds such as nanmu root powder, humic acid high-valency metal salt or derivatives thereof, ammonium methylcellulose, polyacrylamide, leather powder.These drill-feeding plugging agents in the geology coalfield in 23 provinces in the whole nation, district, more than 300 unit of the industries such as metallurgy, coloured, nuclear industry, oil, chemical industry, building materials use.
In recent years, very fast in research and the application facet development of leak-proof leak-stopping technology both at home and abroad, developed multiple lost circulation material, developed the drilling fluid system of multiple leak-proof leak-stopping, wherein bridge blinding and gel blocking technology have obtained using more widely.But these methods also do not solve the root problem of leakage, mainly are that bearing capacity is poor.Reason is that the grain size distribution of conventional lost circulation additive is unreasonable, and particle shape is bad with the form fit in the crack of being blocked up, duct, lacks the acting force that stretches into the borehole wall, greatly reduces shutoff efficient.And the hydroexpanding body lost circulation additive can reach this acting force, improves the bearing capacity of the borehole wall.
Existing blocking method respectively has its relative merits, but generally speaking they all more or less delayed rig time, reduced drilling efficiency, need to stop to bore such as static leak stopping method, above-mentioned other each methods have changed the performance of drilling fluid because adding lost circulation material, need readjust the work such as prescription of drilling fluid, all will expend a large amount of time, bring very large inconvenience to drilling well, cause larger economic loss.In this case, research and the application of plugging while drilling are arisen at the historic moment, and it is to be accompanied by the carrying out of drilling well work and to carry out leak stopping, need not stop to bore, and need not adjust working fluid and lose time, really accomplish with bore with stifled with stifled with brill.Being applicable to the leakage situation is not the various leakages of especially severe, if the long section natural horizontal crack on cavern, large fracture, superficial part stratum and the leakage situation of solution cavity then need other leaking-stopping measure or just can resolve the leak stopping problem with other blocking method compound uses.Plugging while drilling is pre-lost circulation prevention well, greatly reduces the stratum and produces the possibility of inducing the crack leakage.
Preventing having unique advantage aspect perviousness and the fractured leakage with boring leak-proof sealing agent SAR.Its less investment, method is simple, do not need to stop bore to process, decrease processing time and the expense of oil gas leakage, for the bit speed that improves the leakage stratum with reduce drilling cost and be significant.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiencies in the prior art and defective, a kind of method of testing with boring the leak-proof sealing agent imbibition ability is provided, and this method of testing can test out fast with the imbibition ability that bores leak-proof sealing agent, and measuring accuracy is high, testing procedure is simple, greatly reduces testing cost.
Purpose of the present invention is achieved through the following technical solutions: a kind of method of testing with boring the leak-proof sealing agent imbibition ability may further comprise the steps:
(a) will be with boring the leak-proof sealing agent drying for standby of purifying;
(b) claim W
1The drying of gram is put in the reaction vessel with boring leak-proof sealing agent;
(c) imbibition is treated in adding again;
(d) wait absorb saturated after, claim to get the water absorbent gel weight W
2
(e) calculate with the water-intake rate that bores leak-proof sealing agent by following formula:
Water-intake rate=(W
2-W
1)/W
1
In the described step (a), A is with boring leak-proof sealing agent by the ethanol drying of purifying.
In the described step (b), reaction vessel is beaker.
In sum, the invention has the beneficial effects as follows: can test out fast with the imbibition ability that bores leak-proof sealing agent, and measuring accuracy is high, testing procedure is simple, greatly reduces testing cost.
Embodiment
Below in conjunction with embodiment, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited to this.
Embodiment:
The present invention relates to a kind of method of testing with boring the leak-proof sealing agent imbibition ability, may further comprise the steps:
(a) will be with boring the leak-proof sealing agent drying for standby of purifying;
(b) claim W
1The drying of gram is put in the reaction vessel with boring leak-proof sealing agent;
(c) imbibition is treated in adding again;
(d) wait absorb saturated after, claim to get the water absorbent gel weight W
2
(e) calculate with the water-intake rate that bores leak-proof sealing agent by following formula:
Water-intake rate=(W
2-W
1)/W
1
In the described step (a), A is with boring leak-proof sealing agent by the ethanol drying of purifying.
In the described step (b), reaction vessel is beaker.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and any simple modification, the equivalent variations on every foundation technical spirit of the present invention above embodiment done all fall within protection scope of the present invention.
Claims (3)
1. the method for testing with brill leak-proof sealing agent imbibition ability is characterized in that, may further comprise the steps:
(a) will be with boring the leak-proof sealing agent drying for standby of purifying;
(b) claim W
1The drying of gram is put in the reaction vessel with boring leak-proof sealing agent;
(c) imbibition is treated in adding again;
(d) wait absorb saturated after, claim to get the water absorbent gel weight W
2
(e) calculate with the water-intake rate that bores leak-proof sealing agent by following formula:
Water-intake rate=(W
2-W
1)/W
1
2. a kind of method of testing with boring the leak-proof sealing agent imbibition ability according to claim 1 is characterized in that, in the described step (a), A is with boring leak-proof sealing agent by the ethanol drying of purifying.
3. a kind of method of testing with boring the leak-proof sealing agent imbibition ability according to claim 1 is characterized in that in the described step (b), reaction vessel is beaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290381 CN102998199A (en) | 2011-09-14 | 2011-09-14 | Method for testing imbibing capability of leakage-proof plugging agent while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290381 CN102998199A (en) | 2011-09-14 | 2011-09-14 | Method for testing imbibing capability of leakage-proof plugging agent while drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102998199A true CN102998199A (en) | 2013-03-27 |
Family
ID=47927050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110290381 Pending CN102998199A (en) | 2011-09-14 | 2011-09-14 | Method for testing imbibing capability of leakage-proof plugging agent while drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102998199A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237097A (en) * | 2013-06-09 | 2014-12-24 | 中国石油化工股份有限公司 | Plugging effect evaluating method by completely dipping rock debris |
| CN105547900A (en) * | 2015-12-04 | 2016-05-04 | 李锦记（新会）食品有限公司 | Method and system for on-line measurement of soybean water absorption |
-
2011
- 2011-09-14 CN CN 201110290381 patent/CN102998199A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237097A (en) * | 2013-06-09 | 2014-12-24 | 中国石油化工股份有限公司 | Plugging effect evaluating method by completely dipping rock debris |
| CN104237097B (en) * | 2013-06-09 | 2016-12-07 | 中国石油化工股份有限公司 | Landwaste immerses plugging effect evaluation method entirely |
| CN105547900A (en) * | 2015-12-04 | 2016-05-04 | 李锦记（新会）食品有限公司 | Method and system for on-line measurement of soybean water absorption |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130327 |