CN102993371A - Preparation process of leak protection plugging agent along with drilling by controlling dosage of cross-linking agent - Google Patents
Preparation process of leak protection plugging agent along with drilling by controlling dosage of cross-linking agent Download PDFInfo
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- CN102993371A CN102993371A CN 201110290407 CN201110290407A CN102993371A CN 102993371 A CN102993371 A CN 102993371A CN 201110290407 CN201110290407 CN 201110290407 CN 201110290407 A CN201110290407 A CN 201110290407A CN 102993371 A CN102993371 A CN 102993371A
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Abstract
The invention discloses a preparation process of a leak protection plugging agent along with drilling by controlling the dosage of a cross-linking agent. The preparation process comprises the following steps: (a) purifying AM (acrylamide) and AMPS (2-acrylamido-2-methyl propane sulfonic acid) for later use; (b) weighing AA (acrylic acid), hydrolyzing and transferring into a reactor in a super constant-temperature water bath; (c) adding a certain amount of cross-linking agent, wherein the dosage of the cross-linking agent is 0.28%-0.32%; (d) adding AM and AMPS solutions, and regulating the pH value of a reaction system to 7; (e) introducing inert gas for deoxygenation, stirring and adding an initiator; and (f) regulating the temperature to reaction temperature, and performing polymerization reaction for a certain period of time to get a target product. According to the preparation process disclosed by the invention, the leak protection plugging agent along with drilling can be successfully prepared by controlling the dosage of the cross-linking agent in reaction process, the preparation process further has the advantages of high production efficiency, simple production process, simplicity in operation and capability of greatly reducing production cost, various performances of the produced leak protection plugging agent along with drilling are far better than those of an existing product, and the leak protection plugging agent along with drilling is further conductive to field well leakage treatment.
Description
Technical field
The present invention relates to a kind of control the linking agent dosage with boring leak-proof sealing agent preparation technology.
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 finishing liquid 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 measure, 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 testing method 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 investigation to leakage, high level has been arrived in the researchdevelopment of plugging test equipment, leak stoppage tool.
For improving the drilling well working 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, lost circulation additive 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 plugging agents at present, it is the powder-like 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 jelly forms through pulverizing, and it contains Mierocrystalline cellulose, xylogen, poly-pentose etc.), humate, carboxymethyl celluloses.The NFU plugging agent, it is composite and be equipped with powdery or the granulated product that the inert material of different varieties, different grain size, different dosages forms through scientific approach with multiple macromolecular compounds such as nanmu root powder (a kind of Purpleback Murdannia thicket tree root that contains vegetable jelly forms through pulverizing), humic acids high-valency metal salt, starch sodium carboxymethyl, polyacrylamides.The NFDF8012 plugging agent, it is through composite powdery or the granulated product that forms and form with addition of the inert material of difference amount, different grain size, different varieties of scientific formula, scientific approach with multiple macromolecular compounds such as nanmu root powder, humic acids high-valency metal salt or derivatives thereof, ammonium methylcellulose gum, 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 patching materials, 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 plugging agent is unreasonable, and particle shape is bad with the form fit in the crack of being blocked up, duct, lacks the reactive force that stretches into the borehole wall, greatly reduces shutoff efficient.And the hydroexpanding body plugging agent can reach this reactive 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 patching materials, 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 financial loss.In this case, research and the application of lost circulation additive 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.Lost circulation additive is pre-lost circulation prevention well, greatly reduces the stratum and produces the possibility of inducing the crack leakage.
Preventing having advantages of uniqueness aspect perviousness and the fractured leakage with boring leak-proof sealing agent.Its less investment, method is simple, do not need to stop bore to process, decrease treatment time and the expense of oil gas leakage, for the drilling speed that improves the leakage stratum with reduce drilling cost and be significant.
In the technological process of preparation with the brill leak-proof sealing agent, there is very large impact on what prepare in the linking agent dosage with boring the leak-proof sealing agent quality, and suitable linking agent dosage of how to confirm seems particularly important to preparation with boring leak-proof sealing agent.
Summary of the invention
Purpose of the present invention is in order to overcome the deficiencies in the prior art and defective, provide a kind of control the linking agent dosage with boring leak-proof sealing agent preparation technology, this preparation technology is by the linking agent dosage in the control reaction process, thereby can successfully prepare with the brill leak-proof sealing agent, and production efficiency is high, production technique is simple, simple to operate, greatly reduce production cost, and produce all greatly be better than present product with boring the leak-proof sealing agent properties, be beneficial to the processing of on-the-spot leakage.
Purpose of the present invention is achieved through the following technical solutions: control linking agent dosage with boring leak-proof sealing agent preparation technology, may further comprise the steps:
(a) purify AM and AMPS for subsequent use;
(b) take by weighing a certain amount of AA and with its hydrolysis, move into and to place in the reaction vessel of thermostatic water-circulator bath;
(c) add a certain amount of linking agent, and the linking agent dosage is 0.28%～0.32%;
(d) add a certain amount of AM and AMPS, the sodium hydroxide solution with 10% transfers to 7 with pH value of reaction system;
(e) logical rare gas element deoxygenation and stir about add initiator after for some time;
(f) temperature is transferred to temperature of reaction, the polyreaction certain hour namely obtains target product.
In the described step (a), AM and AMPS purify by ethanol.
In the described step (b), reaction vessel is three-necked bottle.
In the described step (c), linking agent is NMBA.
In the described step (e), rare gas element is nitrogen.
In the described step (e), initiator is ammonium persulphate.
In the described step (c), the linking agent dosage is 0.30%.
Above-mentioned AM is acrylamide, is mainly used in improving the molecular weight of polymkeric substance; AMPS is 2-methyl-2-acrylamido propanesulfonic acid, mainly improves the temperature resistant antisalt performance of polymkeric substance; AA is vinylformic acid, is used for improving the water-retaining capacity of polymkeric substance; NMBA is N, and N-methylene-bis acrylic amine is lower same.
In sum, the invention has the beneficial effects as follows: this technique is by the linking agent dosage in the control reaction process, thereby can successfully prepare with boring leak-proof sealing agent, and production efficiency is high, production technique is simple, and is simple to operate, greatly reduces production cost, and that produces all is better than present product greatly with boring the leak-proof sealing agent properties, is beneficial to the processing of on-the-spot leakage.
Description of drawings
Fig. 1 is that the linking agent dosage is on the schematic diagram that affects with brill leak-proof sealing agent performance.
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 control the linking agent dosage with boring leak-proof sealing agent preparation technology, may further comprise the steps:
(a) purify AM and AMPS for subsequent use;
(b) take by weighing a certain amount of AA and with its hydrolysis, move into and to place in the reaction vessel of thermostatic water-circulator bath;
(c) add a certain amount of linking agent, and the linking agent dosage is 0.28%～0.32%;
(d) add a certain amount of AM and AMPS, the sodium hydroxide solution with 10% transfers to 7 with pH value of reaction system;
(e) logical rare gas element deoxygenation and stir about add initiator after for some time;
(f) temperature is transferred to temperature of reaction, the polyreaction certain hour namely obtains target product.
In the described step (a), AM and AMPS purify by ethanol.
In the described step (b), reaction vessel is three-necked bottle.
In the described step (c), linking agent is NMBA.
In the described step (e), rare gas element is nitrogen.
In the described step (e), initiator is ammonium persulphate.
In order to obtain best linking agent dosage, the present invention tests, experiment condition monomer ratio m (AMPS): m (AA): m (AM) is 1: 2: 7, initiator is 1.5%, monomer concentration is 16.7%, pH is 11, under 50 ℃ of conditions, the investigation linking agent is the impact on the hydroexpanding body performance, and the result as shown in Figure 1, as shown in Figure 1, along with the increase of linking agent dosage, the rate of expansion of hydroexpanding body constantly increases, when linking agent reaches 0.3%, it is maximum that rate of expansion reaches, and after this rate of expansion reduces; The elasticity of hydroexpanding body is variation gradually along with the increase of linking agent dosage, becomes fragile.This be because the reaction in when the linking agent dosage is less, the product cross-linking density is low, intensity is little, soluble part is many, liquid absorbency rate is low; And when the linking agent dosage was too high, the product cross-linking density was high, generated fine and close network structure, and sucked liquid is difficult to enter hydroexpanding body inside, also can reduce liquid absorbency rate.Therefore, the better linking agent dosage of this experiment is 0.3%.
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 (7)
- Control linking agent dosage with boring leak-proof sealing agent preparation technology, it is characterized in that, may further comprise the steps:(a) purify AM and AMPS for subsequent use;(b) take by weighing a certain amount of AA and with its hydrolysis, move into and to place in the reaction vessel of thermostatic water-circulator bath;(c) add a certain amount of linking agent, and the linking agent dosage is 0.28%～0.32%;(d) add a certain amount of AM and AMPS, the sodium hydroxide solution with 10% transfers to 7 with pH value of reaction system;(e) logical rare gas element deoxygenation and stir about add initiator after for some time;(f) temperature is transferred to temperature of reaction, the polyreaction certain hour namely obtains target product.
- Control linking agent dosage according to claim 1 with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (a), AM and AMPS purify by ethanol.
- Control linking agent dosage according to claim 1 with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (b), reaction vessel is three-necked bottle.
- Control linking agent dosage according to claim 1 with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (c), linking agent is NMBA.
- Control linking agent dosage according to claim 1 with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (e), rare gas element is nitrogen.
- Control linking agent dosage according to claim 1 with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (e), initiator is ammonium persulphate.
- 7. according to claim 1～6 each described control linking agent dosage with boring leak-proof sealing agent preparation technology, it is characterized in that, in the described step (c), the linking agent dosage is 0.30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290407 CN102993371A (en) | 2011-09-14 | 2011-09-14 | Preparation process of leak protection plugging agent along with drilling by controlling dosage of cross-linking agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110290407 CN102993371A (en) | 2011-09-14 | 2011-09-14 | Preparation process of leak protection plugging agent along with drilling by controlling dosage of cross-linking agent |
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| CN102993371A true CN102993371A (en) | 2013-03-27 |
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| CN 201110290407 Pending CN102993371A (en) | 2011-09-14 | 2011-09-14 | Preparation process of leak protection plugging agent along with drilling by controlling dosage of cross-linking agent |
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Application publication date: 20130327 |