CN102466679A - Method for testing leaking stoppage of ultra-absorbent resin - Google Patents
Method for testing leaking stoppage of ultra-absorbent resin Download PDFInfo
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- CN102466679A CN102466679A CN2010105603098A CN201010560309A CN102466679A CN 102466679 A CN102466679 A CN 102466679A CN 2010105603098 A CN2010105603098 A CN 2010105603098A CN 201010560309 A CN201010560309 A CN 201010560309A CN 102466679 A CN102466679 A CN 102466679A
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Abstract
The invention discloses a method for testing leaking stoppage of ultra-absorbent resin. The method comprises the steps of: preparing the ultra-absorbent resin and well slurry for later use; respectively injecting quantitative river sand in different containers; applying different pressures for carrying out leakage stoppage; and respectively measuring leaking quantities in different times so as to obtain the influence of the pressure and the time to the leakage stoppage capacity of 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
The present invention relates to a kind of method of testing 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; A kind of method of testing of super-strong moisture absorbing resin leak stopping ability is provided; This method of testing can be measured the influence to super-strong moisture absorbing resin leak stopping ability of different pressures and time 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 method of testing of super-strong moisture absorbing resin leak stopping ability may further comprise the steps:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in different vessels, add quantitative river sand respectively, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in different vessels, adds super-strong moisture absorbing resin and well slurry respectively carries out leak stopping, and applies different pressure without container;
(d) test wastage in the different time respectively, thereby obtain the influence of pressure and 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 particle diameter of river sand is 10～100 orders.
In the said step (c), probe temperature is 25 ℃.
In sum, the invention has the beneficial effects as follows: can measure the influence to super-strong moisture absorbing resin leak stopping ability of different pressures and time 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 variation synoptic diagram of interior wastage of identical time with pressure;
Fig. 2 is a wastage synoptic diagram over time under the different pressures.
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:
The method of testing of a kind of super-strong moisture absorbing resin leak stopping ability that the present invention relates to, its concrete steps are following:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in different vessels, add quantitative river sand respectively, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in different vessels, adds super-strong moisture absorbing resin and well slurry respectively carries out leak stopping, and applies different pressure without container;
(d) test wastage in the different time respectively, thereby obtain the influence of pressure and 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 particle diameter of river sand is 10～100 orders.
In the said step (c), probe temperature is 25 ℃.
In order to obtain the influence of different pressures and time, theoretical foundation is provided for super-strong moisture absorbing resin is applied to leak stopping to super-strong moisture absorbing resin leak stopping ability.The present invention has done different pressures respectively and the time tests the influence of super-strong moisture absorbing resin leak stopping ability, and the result is like Fig. 1, shown in 2.Can be known by Fig. 1,2: just begun in the continuous pressure process, wastage increases.Because in the following period of time of beginning, lost circulation additive also is not squeezed into leakage channel, does not bring into play plugging action, the drop ply connectedness is fine, so in time, pressure changes, wastage is quickens increase trend, when being forced into P
1The time, reach the wastage maximum point.In pressure process, the super-strong moisture absorbing resin driving that is stressed is constantly clamp-oned drop ply and is matched, imbibition simultaneously, thus constantly stop up leakage channel, to miss controlledly, wastage constantly reduces, when being forced into another pressure P
2The time, bearing capacity is best, obtains the wastage minimum value.After this increase with pressure, super-strong moisture absorbing resin can not bear this pressure reduction, and flow channel is opened again, and wastage is quickened to increase, and final drop ply is breakdown because of bearing pressure reduction.
Can know that through The above results constantly raise with pressure reduction, plugging effect is become better and better, super-strong moisture absorbing resin constantly is squeezed into the crack passage, fills with formation channels coupling, the obstruction of building bridge, compacting, simultaneously, continues imbibition, and plugging action is become better and better.And after pressure surpasses certain value, just bearing capacity is played destruction, and promptly reducing gradually with pressure rising bearing capacity, wastage is increasing, reaches breakthrough pressure at last, and the stratum is breakdown.
Above-mentioned method of testing can be measured the influence to super-strong moisture absorbing resin leak stopping ability of different pressures and time 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 (5)
1. the method for testing of a super-strong moisture absorbing resin leak stopping ability is characterized in that, may further comprise the steps:
(a) producing super-strong moisture absorbing resin and well starches subsequent use;
(b) in different vessels, add quantitative river sand respectively, through this loose leakiness stratum of sand bed simulation;
(c) the mixing leakage-stop liquid that in different vessels, adds super-strong moisture absorbing resin and well slurry respectively carries out leak stopping, and applies different pressure without container;
(d) test wastage in the different time respectively, thereby obtain the influence of pressure and time super-strong moisture absorbing resin leak stopping ability.
2. the method for testing of a kind of super-strong moisture absorbing resin leak stopping ability according to claim 1 is characterized in that, in the said step (b), container is a steel cylinder.
3. the method for testing of a kind of super-strong moisture absorbing resin leak stopping ability according to claim 1 is characterized in that, in the said step (b), the particle diameter of river sand is inhomogeneous.
4. the method for testing of a kind of super-strong moisture absorbing resin leak stopping ability according to claim 1 is characterized in that, in the said step (b), the particle diameter of river sand is 10～100 orders.
5. the method for testing of a kind of super-strong moisture absorbing resin leak stopping ability according to claim 1 is characterized in that, in the said step (c), probe temperature is 25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105603098A CN102466679A (en) | 2010-11-18 | 2010-11-18 | Method for testing leaking stoppage of ultra-absorbent resin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105603098A CN102466679A (en) | 2010-11-18 | 2010-11-18 | Method for testing leaking stoppage of ultra-absorbent resin |
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| CN102466679A true CN102466679A (en) | 2012-05-23 |
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| CN2010105603098A Pending CN102466679A (en) | 2010-11-18 | 2010-11-18 | Method for testing leaking stoppage of ultra-absorbent resin |
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- 2010-11-18 CN CN2010105603098A patent/CN102466679A/en active Pending
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Application publication date: 20120523 |