CN102466590A - Method for testing influence of time on leakage stoppage effect of super-absorbent resin - Google Patents
Method for testing influence of time on leakage stoppage effect of super-absorbent resin Download PDFInfo
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- CN102466590A CN102466590A CN2010105586815A CN201010558681A CN102466590A CN 102466590 A CN102466590 A CN 102466590A CN 2010105586815 A CN2010105586815 A CN 2010105586815A CN 201010558681 A CN201010558681 A CN 201010558681A CN 102466590 A CN102466590 A CN 102466590A
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- absorbing resin
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Abstract
The invention discloses a method for testing influence of time on a leakage stoppage effect of super-absorbent resin. The method for testing influence of time on the leakage stoppage effect of the super-absorbent resin comprises the following steps of: preparing the super-absorbent resin and well slurry for later use; respectively adding quantitative river sand to different vessels; adding the super-absorbent resin and wall slurry for leakage stoppage; and respectively testing leakage amounts within different time so as to obtain the influence of time on the leakage stoppage effect of the super-absorbent resin. The method disclosed by the invention can be used for testing the influence of different time on the leakage stoppage effect of the super-absorbent resin, has the advantages of high testing precision and simple test samples and provides a theoretical basis for application of the super-absorbent resin to leakage stoppage.
Description
Technical field
The present invention relates to the method for a kind of test duration to the influence of super-strong moisture absorbing resin leak stopping ability.
Background technology
Drilling fluid leakage is a kind of common down hole problem in the drilling operation.That leakage can occur in is shallow, in and deep formation, also can in the geochronic stratum of difference, take place, and all possibly occur in the stratum of all kinds of lithology.The leakage that has is that mud pit level slowly descends, and then having into of having do not have, in case miss; Not only incur loss through delay the drilling operation time, prolong drilling period, the loss drilling fluid; The infringement hydrocarbon zone is disturbed geological logging work, but also possibly caused a series of complex situations and accidents such as well slough, bit freezing, blowout; Even cause well to be scrapped, cause great economic loss.Therefore, in drilling operation, should avoid the generation of leakage as far as possible.
According to statistics, whole world leakage incidence accounts for 25 20 percent to percent of total well number, and the annual fund that expends because of leakage is up to several hundred million units in the global petroleum industry.All there is the leakage problem to some extent in the most of oil fields of China, and the most outstanding is that Chuan Dong is regional with south, river, and annual leak stopping is consuming time to account for 5～8% of the gross drilling time.Also to consume a large amount of drilling fluids and lost circulation material simultaneously, drilling cost is risen significantly.As area, east, a river year loss mud amount is 8000～13000m a few years ago
3, year about 200 wells of generation leakage, 14～35 rig moons of lost time, year is directly consumed 400～6,000,000 yuan.
The leakage problem is drilling well work long-term existence and fails the technical barrier of fine solution that leakage stopping technology is the important topic that drilling engineering circle studies for a long period of time.Leakage stopping technology has had bigger development in recent years, and each oil field has all summed up the leak-stopping technique technology of suitable this area characteristics both at home and abroad, and the kind of lost circulation material is on the increase, and the leak stopping success ratio is also improving constantly.
However, because the each department formation lithology changes hole, crack, solution cavity developmental state difference; The reason of leakage is complicated, the leakage type is different; Restraining factors are more, and the specific aim of leakage stopping technology is stronger, are difficult to so far carry out leakproof and leak stopping with a general pattern.It is even more serious particularly to bore fissured formation leakage problem.According to incompletely statistics, the reserves of state's internal fissure property bad ground account for 50% of total reserves, but grow because of formation fracture, hole, and the leakage problem is difficult to solve, the loss that causes and serious.Therefore, the pernicious leakage problem of crack property bad ground has become the emphasis that drilling well circle is paid close attention to.
About the research of super-strong moisture absorbing resin, external starting is morning, and what wherein effect was maximum is the U.S. and Japan, secondly is Germany and French.And decades in evening are wanted in domestic relative research, but in the last few years, relevant technology emerges in an endless stream, and each side all is being devoted to research whole-heartedly.
1961, north research institute of United States Department of Agriculture began from starch-grafted vinyl cyanide, and super-strong moisture absorbing resin is studied, and this type of research subsequently is more and more deep, and successfully developed super-strong moisture absorbing resin to the seventies end of the sixties.After this, number of research projects has been carried out to the aspects such as kind, manufacturing approach, performance and application of super-strong moisture absorbing property resin in countries in the world such as Germany, France, has obtained achievement.Begin the eighties to occur producing the water absorptivity material through chemical reaction with other natural compound derivatives.
The expansion of and applied research synthetic along with super absorbent resin, the also corresponding development of its forming processing technology.Absorbent composites produced in the eighties in 20th century, because it can improve many performances such as intensity of hydrogel after the brine tolerance, absorption speed, suction of super-strong moisture absorbing property resin, so development rapidly.To the beginning of the nineties, advance by leaps and bounds especially.In recent years the blend of water-absorbing resins has begun one's study.These provide wide prospect more for the development super absorbent resin.
The dominant company of world production super absorbent resin in 1985 has only 13 families, to nineteen ninety-five foreign study and the company of production reach nearly 50 families unexpectedly.Japan is maximum in the world super-strong moisture absorbing resin production and research state.Cooperate with other countries such as the U.S., Germany again subsequently, the super-strong moisture absorbing resin technology is rapid growth constantly.
For the super-strong moisture absorbing resin Study on Theory, the 1950's, the suction theory of Flory was established theoretical foundation for the development of absorbent polymer.After the sixties, super-strong moisture absorbing property resin began to go into operation, along with its fast development, People more and more need to feel the further instructive theory of further investigation super-strong moisture absorbing property resin.The end of the seventies, various countries began to pay attention to its research in succession.State such as Japan and the United States particularly, more fruitful theoretical research has been carried out in, hydrating structure theoretical in suction and aspects such as form and macromolecule hydrogel, and new development has been arranged.
The super-strong moisture absorbing resin water absorptivity is strong, can absorb the water of tens to several thousand times of own vols, and the ability biodegradation is widely used, and considers it also is a good selection from the global environment factor.Transport fluid suppresses water absorbent polymer and expands, and with water filling behind mixture pump such as the drop ply, makes its expansion, thus the shutoff weak zone, and particularly to serious fractured leakage situation, this technology is in aboveground successful Application.Abroad on the super-strong moisture absorbing resin leakage stopping technology, start to walk early, achievement is many, and the correlation technique instance is also a lot.
Super-strong moisture absorbing resin is popularized in the petroleum industry field gradually, and the research that relevant oilfield chemistry is used hydroscopic high-molecular resin has also caused oilfielder's attention.Particularly in the oil gas field probing, be used as the chemical plugging material, chemical plugging is a kind of important techniques measure in the oil gas field drilling process.Development since the eighties has obtained good achievement.At present, the on-the-spot lost circulation additive of the hydroscopic high-molecular resin class of Application and Development has SYZ, PAT and TP-9010 type brand, JPD imbibition polymkeric substance, WS-1 type GEL USED FOR PLUGGING WELL LOST CIRCULATION, WEA-1 delayed expansion particle lost circulation additive.
In addition, super-strong moisture absorbing resin can be made encapsulant in the defeated construction of oil gas field ground line; In probing, make additive for drilling fluid, can be used as the lubricant of drill bit and the gel of drilling fluid; Application in other professional domains of oilfield chemistry because of its performance is remarkable, like tertiary oil recovery, is made gel in oil gas field waste water treatment aqueous fracturing fluid, the acid fracturing liquid, the hardening agent of well control fluid etc.
In a word, the development of super-strong moisture absorbing resin is also just in nearly decades.No matter, perhaps, all obtained huge development from the situation of processing and application and theoretical research from the kind and the quantity of product.Because performance that hydroscopic high-molecular resin is peculiar and considerable application prospect; Develop extremely rapid over 30 years; By general application performance, function, to the high-level exploitation development of intelligent multi-function material, its application has been penetrated into all trades and professions of national economy.Particularly be a new applied research direction in oilfield chemistry, have a good application prospect.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art; The method of a kind of test duration to the influence of super-strong moisture absorbing resin leak stopping ability is provided; This method of testing can be measured the influence of different time to super-strong moisture absorbing resin leak stopping ability fast; Measuring accuracy is high, and testing procedure is simple, for super-strong moisture absorbing resin is applied to leak stopping theoretical foundation is provided.
The object of the invention is realized through following technical proposals: a kind of test duration may further comprise the steps the method for super-strong moisture absorbing resin leak stopping ability influence:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in container, add quantitative river sand, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in container, adds super-strong moisture absorbing resin and well slurry carries out leak stopping, and applies certain pressure;
(d) test the interior wastage of different time respectively, thereby obtain the influence of time super-strong moisture absorbing resin leak stopping ability.
In the said step (b), container is a steel cylinder.
In the said step (b), the particle diameter of river sand is inhomogeneous.
In the said step (b), the river sand particle diameter is between 10～100 orders.
In the said step (c), probe temperature is 25 ℃.
In the said step (c), applied pressure is 1.2MPa.
In sum, the invention has the beneficial effects as follows: can measure the influence of different time to super-strong moisture absorbing resin leak stopping ability fast, measuring accuracy is high, and testing procedure is simple, for super-strong moisture absorbing resin is applied to leak stopping theoretical foundation is provided.
Description of drawings
Fig. 1 is the influence synoptic diagram of time to super-strong moisture absorbing resin leak stopping ability.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done further detailed description, but embodiment of the present invention is not limited only to this.
Embodiment:
A kind of test duration that the present invention relates to, its concrete steps were following to the method for super-strong moisture absorbing resin leak stopping ability influence:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in container, add quantitative river sand, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in container, adds super-strong moisture absorbing resin and well slurry carries out leak stopping, and applies certain pressure;
(d) test the interior wastage of different time respectively, thereby obtain the influence of time super-strong moisture absorbing resin leak stopping ability.
In the said step (b), container is a steel cylinder.
In the said step (b), the particle diameter of river sand is inhomogeneous.
In the said step (b), the river sand particle diameter is between 10～100 orders.
In the said step (c), probe temperature is 25 ℃.
In the said step (c), applied pressure is 1.2MPa.
In order to obtain different time, theoretical foundation is provided for super-strong moisture absorbing resin is applied to leak stopping to influence to super-strong moisture absorbing resin leak stopping ability.The present invention has done the influence test of different time to super-strong moisture absorbing resin leak stopping ability respectively, and the result is as shown in Figure 1.
Above-mentioned method of testing can be measured the influence of different time to super-strong moisture absorbing resin leak stopping ability fast, and measuring accuracy is high, and testing procedure is simple, for super-strong moisture absorbing resin is applied to leak stopping theoretical foundation is provided.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment did all fall within protection scope of the present invention.
Claims (6)
1. a test duration is characterized in that the method that super-strong moisture absorbing resin leak stopping ability influences, and may further comprise the steps:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in container, add quantitative river sand, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in container, adds super-strong moisture absorbing resin and well slurry carries out leak stopping, and applies certain pressure;
(d) test the interior wastage of different time respectively, thereby obtain the influence of time super-strong moisture absorbing resin leak stopping ability.
2. a kind of test duration according to claim 1 is characterized in that to the method for super-strong moisture absorbing resin leak stopping ability influence in the said step (b), container is a steel cylinder.
3. a kind of test duration according to claim 1 is characterized in that to the method for super-strong moisture absorbing resin leak stopping ability influence in the said step (b), the particle diameter of river sand is inhomogeneous.
4. a kind of test duration according to claim 1 is characterized in that to the method for super-strong moisture absorbing resin leak stopping ability influence in the said step (b), the river sand particle diameter is between 10～100 orders.
5. a kind of test duration according to claim 1 is characterized in that to the method for super-strong moisture absorbing resin leak stopping ability influence in the said step (c), probe temperature is 25 ℃.
6. a kind of test duration according to claim 1 is characterized in that to the method for super-strong moisture absorbing resin leak stopping ability influence in the said step (c), applied pressure is 1.2MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105586815A CN102466590A (en) | 2010-11-18 | 2010-11-18 | Method for testing influence of time on leakage stoppage effect of super-absorbent resin |
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| CN2010105586815A CN102466590A (en) | 2010-11-18 | 2010-11-18 | Method for testing influence of time on leakage stoppage effect of super-absorbent resin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168336A (en) * | 2017-01-17 | 2019-08-23 | 沃特世科技公司 | For detecting system, the method and apparatus of the leakage in chromatographic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110168336A (en) * | 2017-01-17 | 2019-08-23 | 沃特世科技公司 | For detecting system, the method and apparatus of the leakage in chromatographic system |
| CN110168336B (en) * | 2017-01-17 | 2022-04-19 | 沃特世科技公司 | Systems, methods, and apparatus for detecting leaks in chromatography systems |
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Application publication date: 20120523 |