FR2598144A2 - Process for delaying and controlling the formation of gels or precipitates of aluminium derivatives, corresponding compositions and applications especially in the operation of oil wells - Google Patents
Process for delaying and controlling the formation of gels or precipitates of aluminium derivatives, corresponding compositions and applications especially in the operation of oil wells Download PDFInfo
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- FR2598144A2 FR2598144A2 FR8606434A FR8606434A FR2598144A2 FR 2598144 A2 FR2598144 A2 FR 2598144A2 FR 8606434 A FR8606434 A FR 8606434A FR 8606434 A FR8606434 A FR 8606434A FR 2598144 A2 FR2598144 A2 FR 2598144A2
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
- C01F7/57—Basic aluminium chlorides, e.g. polyaluminium chlorides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
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Abstract
Description
Procédé pour retarder et contrôler la formation de aels ou nréciPit8s de dérivés d'aluminium, compositions correspondantes et applications notamment à l'exploitation de Duits pétroliers. Process for delaying and controlling the formation of aels or nréciPit8s of aluminum derivatives, corresponding compositions and applications in particular for the exploitation of petroleum wells.
La présente invention concerne des compositions permettant de retarder et contrôler la formation de gels ou précipités de dérivés d'aluminium, dans le domaine de l'exploitation de puits pétroliers.The present invention relates to compositions for delaying and controlling the formation of gels or precipitates of aluminum derivatives, in the field of the exploitation of oil wells.
Lorsque l'on produit des hydrocarbures i partir de formations souterraines, il est souvent souhaitable de réduire la perméabilité de certaines zones de la formation. Ceci est par exemple le cas lorsqu'une formation voisine du puits de production permet le passage d'eau de la formation vers le puits. Un autre exemple concerne le cas où des zones de forte perméabilité sont adjacentes aux puits d'injection.When producing hydrocarbons from underground formations, it is often desirable to reduce the permeability of certain areas of the formation. This is for example the case when a formation close to the production well allows the passage of water from the formation to the well. Another example relates to the case where zones of high permeability are adjacent to the injection wells.
Une méthode pour reduire la perméabilité de certaines zones de formations souterraines consiste à précipiter un produit in situ. Cette technique est bien connue et est habituellement mise en oeuvre par un placement consécutif de deux fluides incompatibles dans le réservoir. Ainsi, il se forme un précipité et l'on obtient une réduction de perméabilité partout où les deux fluides se mélangent dans le réservoir. L'homme de métier pourra par exemple se reporter aux brevets des
Etats-Unis d'Amérique
No 3,837,400 - 4,031,958 - 4,304,301.One method of reducing the permeability of certain areas of underground formations consists in precipitating a product in situ. This technique is well known and is usually implemented by a consecutive placement of two incompatible fluids in the tank. Thus, a precipitate is formed and a reduction in permeability is obtained wherever the two fluids mix in the tank. Those skilled in the art may for example refer to the patents of
United States of America
No 3,837,400 - 4,031,958 - 4,304,301.
Une seconde possibilité réside dans l'introduction d'un fluide destiné réagir avec un composant particulier du réservoir, par exemple, l'eau contenue dans le réservoir, pour former un précipité insoluble. L'homme de métier pourra se reporter dans ce domaine au brevet des Etats-Unis d'A métrique No 3,837,400.A second possibility lies in the introduction of a fluid intended to react with a particular component of the reservoir, for example, the water contained in the reservoir, to form an insoluble precipitate. Those skilled in the art may refer in this area to the United States patent A 3,837,400.
Une autre technique consiste encore a introduire un fluide qui possède un potentiel intrinsèque å former un précipité ou un gel, cette formation étant cependant retardée d'une manière quelquonque. Yet another technique is to introduce a fluid which has intrinsic potential to form a precipitate or gel, however this formation is somewhat delayed.
L'homme de métier pourra se référer dans ce domaine aux brevets des Etats-unis d'Amérique No 4,413,680 et 3,614,985. Those skilled in the art may refer in this area to United States of America patents Nos. 4,413,680 and 3,614,985.
Le contrôle des deux paramètres, c'est à dire du retard apporté à la réaction de relation ou de précipitation, et de la morphologie de la phase solide produite, est essentiel pour bien concevoir l'opération à effectuer, car le retard apporté à la réaction détermine le degré possible de pénétration à l'intérieur de la formation, tandis que la morphologie de la phase solide détermine l'efficacité avec laquelle il sera possible de réduire la perméabilité de la formation.The control of the two parameters, that is to say the delay brought to the relation or precipitation reaction, and the morphology of the solid phase produced, is essential to properly design the operation to be carried out, because the delay brought to the reaction determines the possible degree of penetration inside the formation, while the morphology of the solid phase determines the efficiency with which it will be possible to reduce the permeability of the formation.
Le brevet des Etats-Unis d'Amérique No 3,614,985 décrit la précipitation d'hydroxydes métalliques, tels que de l'hydroxyde de chrome ou d'aluminium, à partir d'une solution homogène.U.S. Patent No. 3,614,985 describes the precipitation of metal hydroxides, such as chromium or aluminum hydroxide, from a homogeneous solution.
De nombreux sels simples d'aluminium III tels que le chlorure d'aluminium ou le nitrate d'aluminium sont solubles dans des milieux moyennement acides, mais forment des hydroxydes d'aluminium insolubles lorsque le pH dépasse approximativement la valeur 5.Many simple aluminum III salts such as aluminum chloride or aluminum nitrate are soluble in moderately acidic media, but form insoluble aluminum hydroxides when the pH exceeds approximately the value 5.
Le brevet précité décrit la formation retardée de composés de type hydroxyde d'aluminium, par une composition contenant une solution d'un sel convenable d'aluminium et un activateur.The aforementioned patent describes the delayed formation of compounds of the aluminum hydroxide type, by a composition containing a solution of a suitable aluminum salt and an activator.
L'activateur sert à élever lentement le pH de la solution, aux températures classiques de fond de puits, ce qui provoque par conséquent la formation lente d'une phase hydroxyde insoluble. Selon ce document, un activateur convenable est l'urée qui subit une hydrolyse à haute température avec formation d'ammoniac, ce qui par conséquent élève le pH de la solution. La phase solide d'hydroxyde d'aluminium précipitée de cette manière a tendance à ètre amorphe et sa consistance est celle d'un gel.The activator is used to slowly raise the pH of the solution, to conventional downhole temperatures, which consequently causes the slow formation of an insoluble hydroxide phase. According to this document, a suitable activator is urea which undergoes hydrolysis at high temperature with formation of ammonia, which consequently raises the pH of the solution. The solid phase of aluminum hydroxide precipitated in this way tends to be amorphous and its consistency is that of a gel.
Le seul exemple de système pratique décrit dans le brevet précité concerne la précipitation de l'hydroxyde d'aluminuim à partir du chlorure d'aluminium. Cependant, tel qu'il est décrit, le système est impraticable pour l'utilisation dans le domaine de l'exploitation pétrolière, aussi bien du point de vue de la sécurité que du point de vue technique. En effet, le chlorure d'aluminium solide réagit violemment avec l'eau, avec dégagement de chaleur et de vapeurs d'acide chlorydrique. The only example of a practical system described in the aforementioned patent concerns the precipitation of aluminum hydroxide from aluminum chloride. However, as described, the system is impractical for use in the field of petroleum exploitation, both from the safety point of view and from the technical point of view. Indeed, solid aluminum chloride reacts violently with water, with the release of heat and hydrochloric acid vapors.
Sur le champ, un tel système serait donc extremement dangereux à manipuler. De plus, l'utilisation d'une solution concentrée en chlorure d'aluminium n'est pas souhaitable, en raison du volume nécessaire de fluide et de l'obligation d'utiliser un inhibiteur de corrosion pour protéger les pompes doseuses.On the field, such a system would therefore be extremely dangerous to handle. In addition, the use of a concentrated solution of aluminum chloride is not desirable, because of the necessary volume of fluid and the obligation to use a corrosion inhibitor to protect the metering pumps.
On sait que les inhibiteurs de corrosion affectent souvent le traitement du puits.It is known that corrosion inhibitors often affect the treatment of the well.
Les solutions typiques de traitement (environ 0,05 0,15 M Al 3+) ont un pH d'environ 3 et, comme le recommande le brevet précité, il est préférable de régler le pH à environ 4. En effet, à pH 3, l'intEraction du fluide -avec les carbonates présents dans le milieu poreux est très rapide et limite la pénétration du fluide dans la matrice. Même dans le cas d'un grès très pur, où l'interaction avec les carbonates n'est pas un problème, un pH de 3 nécessite une forte concentration en urée pour provoquer la réaction de précipitation, et, on préférera donc un pH - 4.Typical treatment solutions (approximately 0.05 0.15 M Al 3+) have a pH of approximately 3 and, as recommended by the aforementioned patent, it is preferable to adjust the pH to approximately 4. Indeed, at pH 3, the interaction of the fluid with the carbonates present in the porous medium is very rapid and limits the penetration of the fluid into the matrix. Even in the case of a very pure sandstone, where the interaction with carbonates is not a problem, a pH of 3 requires a high concentration of urea to cause the precipitation reaction, and, we will therefore prefer a pH - 4.
Malheureusement, avec le système décrit dans le brevet précité, cet ajustement du pH est impossible ou au mieux impraticable. L'addition d'un agent alcalin à une solution typique de chlorure d'aluminium provoque en effet une précipitation immédiate et inévitable, et, bien que ce précipité se dissolve lentement avec le temps en donnant une solution de pH plus élevé, la présence de ce précipité nécessite l'emploi de techniques de mélange en discontinu. Ces tecniques ne peuvent pas etre choisies pour des opérations portant sur des quantités importantes de fluide, durant plusieurs jours ou plusieurs semaines, d'autant plus que les opérations sont effectuées sur des espaces très restreints. Ce qui précède est valable lorsque l'on dispose d'eau pure. Lorsque l'eau de mélange n'est pas de l'eau pure mais une saumure classique sur les champs pétroliers, comme par exemple une saumure, de l'eau de mer, etc., le précipité initial formé par l'addition de l'agent alcalin ne se redissoudra pas, meme sous agitation énergique à haute température, et durant une longue période. Dans un tel cas, qui est très fréquent, le problème n'a pas de solution. Unfortunately, with the system described in the aforementioned patent, this adjustment of the pH is impossible or at best impractical. The addition of an alkaline agent to a typical solution of aluminum chloride in fact causes immediate and inevitable precipitation, and, although this precipitate dissolves slowly over time giving a solution of higher pH, the presence of this precipitate requires the use of batch mixing techniques. These techniques cannot be chosen for operations involving large quantities of fluid, lasting several days or several weeks, all the more so since the operations are carried out on very limited spaces. The above is valid when pure water is available. When the mixing water is not pure water but a conventional brine on oil fields, such as for example brine, sea water, etc., the initial precipitate formed by the addition of l The alkaline agent will not redissolve, even with vigorous stirring at high temperature, and for a long time. In such a case, which is very common, the problem has no solution.
Une étape importante a été franchie avec la demande principale FR-A-85. 10272 déposée le 2 juillet 85 et qui décrit l'emploi d'un hydroxychlorure d'aluminium. Ce sel polymère est produit commercialement par électrolyse de solutions de chlorure d'aluminium. I1 répond sous sa forme crystalline à la formule
[Al2(OH)5Cl, 2,5 H2O]n.An important milestone was reached with the main application FR-A-85. 10272 filed July 2, 85 and which describes the use of an aluminum hydroxychloride. This polymer salt is produced commercially by electrolysis of aluminum chloride solutions. I1 responds in its crystalline form to the formula
[Al2 (OH) 5Cl, 2.5 H2O] n.
Plus généralement il s'agit d'un sel acide d'aluminium, partiellement neutralisé, de formule générale
Aln(OH)mXp dans laquelle X est un anion minéral ou organique ou un mélange d'anions minéraux ou organiques, avec (pxq) + m " 3n, q étant la valence de l'anion, le rapport (m/3n)xlO0 définissant la basicité dudit sel et se situant entre 30 et 80 %.More generally it is an acid salt of aluminum, partially neutralized, of general formula
Aln (OH) mXp in which X is a mineral or organic anion or a mixture of mineral or organic anions, with (pxq) + m "3n, q being the valence of the anion, the ratio (m / 3n) xlO0 defining the basicity of said salt and being between 30 and 80%.
L'emploi d'un hydroxychlorure d'aluminium comme agent de colmatage ("plugging agent") permet de résoudre les problèmes rencontrés dans l'art antérieur, et également d'ouvrir de nouvelles possibilités à l'homme du métier, notamment un contrôle efficace du temps de gel ou de précipitation et un contrôle de la morphologie du précipité. The use of an aluminum hydroxychloride as a plugging agent makes it possible to solve the problems encountered in the prior art, and also to open up new possibilities for those skilled in the art, in particular a control. effective freezing or precipitation time and control of the morphology of the precipitate.
GEL : Dans le cas où la zone de forte perméabilité que l'on doit traiter est réellement et simplement une matrice poreuse, une phase solide résistante à consistance de gel sera probablement préférée et plus efficace pour diminuer l'écoulement dans ladite zone.GEL: In the case where the zone of high permeability which must be treated is really and simply a porous matrix, a solid solid phase resistant to gel consistency will probably be preferred and more effective in reducing the flow in said zone.
PARTICULES : Un précipité de particules solides pourra outre préféré lorsque la zone de forte perméabilité est due à la fois à une matrice poreuse et à une fracture. En effet, les particules formées dans la fracture se déposeront sur les faces de la fracture où apparait l'écoulement, et les zones correspondantes seront colmatées. PARTICLES: A precipitate of solid particles may be more preferred when the zone of high permeability is due to both a porous matrix and a fracture. Indeed, the particles formed in the fracture will be deposited on the faces of the fracture where the flow appears, and the corresponding zones will be clogged.
L'hydroxychlorure d'aluminium se dissout rapidement et totalement, et sans dégagement d'une quantité importante de chaleur ni de gaz chlorhydrique.Aluminum hydroxychloride dissolves quickly and completely, without releasing a significant amount of heat or hydrochloric gas.
Ceci représente déjà une amélioration importante concernant la sécurité. L'hydroxychlorure d'aluminium est également disponible en solution aqueuse concentrée, dans le cas où un dosage liquide est absolument essentiel sur un site donné, et ce sel polymère présente l'avantage complémentaire d'être environ deux fois plus concentré que les solutions commerciales de chlorure d'aluminium qui ne présentent qu'un pH d'environ 3.This is already a significant improvement in security. Aluminum hydroxychloride is also available in concentrated aqueous solution, in the case where a liquid dosage is absolutely essential on a given site, and this polymer salt has the additional advantage of being approximately twice as concentrated as commercial solutions aluminum chloride which only have a pH of around 3.
L'hydroxychlorure d'aluminium se dissout rapidement et totalement avec formation de solutions dont le pH est compris entre 4 et 4,5, ce qui assure une pénétration suffisante dans le réservoir sans qu'il soit nécessaire d'avoir recours à des agents caustiques ni à des techniques discontinues, tandis qu'au contraire des techniques de mélange en continu deviennent possibles.Aluminum hydroxychloride dissolves quickly and completely with the formation of solutions with a pH between 4 and 4.5, which ensures sufficient penetration into the tank without the need for caustic agents nor to discontinuous techniques, while on the contrary continuous mixing techniques become possible.
L'homme de métier pourra se référer à la demande de brevet 85-10272 précitée, dont l'enseignement est incorporé ici à titre de référence.A person skilled in the art can refer to the aforementioned patent application 85-10272, the teaching of which is incorporated here for reference.
Selon la présente invention, il a été découvert que d'autres bases faibles que l'urée pouvaient etre utilises comme "activateur". L'invention propos en particulier l'emploi de l'hexaméthylènetétramine comme "activateur" en combinaison avec un hydroxychlorure d'aluminium utilisé comme agent de colmatage ("plugging agent").According to the present invention, it has been discovered that other weak bases than urea can be used as an "activator". The invention proposes in particular the use of hexamethylenetetramine as an "activator" in combination with an aluminum hydroxychloride used as a plugging agent.
On trouvera dans ce qui suit des exemples non limitatifs de l'invention et des résultats obtenus aussi bien avec l'ure qu'avec l'hexamethylènetetramine.The following are non-limiting examples of the invention and the results obtained both with urea and with hexamethylenetetramine.
On notera que le produit "LOCRON" est un hydroxychlorure d'aluminium solide répondant à la formule précitée et commercialisé par la Société
HOECHST A.G., Allemagne fédérale.It will be noted that the product "LOCRON" is a solid aluminum hydroxychloride corresponding to the above formula and marketed by the Company
HOECHST AG, Federal Germany.
Les % sont en volume, sauf indication contraire.
Dans les tableaux suivants, les symboles ont les significations suivantes
GG : gel résistant
WG : gel peu resistant
BG : gel cassé
NG : pas de formation de gel
S : synérèse (retrait)
C : solution trouble C1 : solution claire jours h : heures. The% are by volume, unless otherwise indicated.
In the following tables, the symbols have the following meanings
GG: resistant gel
WG: weak gel
BG: broken gel
NG: no gel formation
S: syneresis (withdrawal)
C: cloudy solution C1: clear solution days h: hours.
Exemple 1 : "LOCRON" + urée
Variables : % NaCl
Température d'essai
Différentes solutions contenant l'hydroxychlorure d'aluminium "LOCRON", de l'urée et du NaCl sont préparées et on élève leur température jusqu'à la "température d'essai".Example 1: "LOCRON" + urea
Variables:% NaCl
Test temperature
Different solutions containing aluminum hydroxychloride "LOCRON", urea and NaCl are prepared and their temperature is raised to the "test temperature".
On observe, ou non, la formation d'un gel (essai "en bouteille", "bottle test").We observe, or not, the formation of a gel ("bottle test").
La composition des solutions, la température d'essai, et les résultats après un certain nombre d'heures ou de jours sont rassemblés dans les
Tableaux I à VI suivants.The composition of the solutions, the test temperature, and the results after a certain number of hours or days are collected in the
Tables I to VI below.
Exemple 2 : "LOCRON" + urée
NaCl, CaCl2 ou eau de mer.Example 2: "LOCRON" + urea
NaCl, CaCl2 or sea water.
Température d'essai, 80 C (176 F). Test temperature, 80 C (176 F).
On procède comme dans l'exemple 1.The procedure is as in Example 1.
La concentration en l'hydroxychlorure d'aluminium "LOCRON" est de 3 % en volume de la solution, ainsi que la concentration en urée, également 3 % en volume de la solution.The concentration of aluminum hydroxychloride "LOCRON" is 3% by volume of the solution, as well as the concentration of urea, also 3% by volume of the solution.
La composition de l'eau de mer utilisée est indiquée dans le Tableau VII ci-après.The composition of the seawater used is shown in Table VII below.
Les résultats obtenus auprès un certain nombre d'heures, ainsi que les % en NaCl et CaCl2, sont rassemblés dans le Tableau VIXI ci-apres,
Exemple 3: "LOCRON" + hexamethylène tétramine
C6 H12 N4
Température d'essai : 800C (176 F)
NaCl : 1 t
On opère comme dans les exemples 1 et 2.The results obtained from a certain number of hours, as well as the% in NaCl and CaCl2, are collated in Table VIXI below,
Example 3: "LOCRON" + hexamethylene tetramine
C6 H12 N4
Test temperature: 800C (176 F)
NaCl: 1 t
The procedure is as in Examples 1 and 2.
On utilise 3 t de "LOCRON" et 1 % de NaCl. 3 t of "LOCRON" and 1% NaCl are used.
Les compositions, et les résultats obtenus après un certain nombre d'heures, sont rassemblés dans le
Tableau IX ci-aprEs. The compositions, and the results obtained after a certain number of hours, are collected in the
Table IX below.
Les temps de gélification obtenus avec 1 % NaCl et 3 % "LOCRON", à 80 C, (1760F) sont par ailleurs indiqués sur la figure unique annexee, en fonction de la concentration en hexamethylènetetramine.The gel times obtained with 1% NaCl and 3% "LOCRON", at 80 ° C., (1760F) are also indicated in the attached single figure, as a function of the concentration of hexamethylenetetramine.
L'homme de métier saura utiliser les tableaux présentés ici pour choisir au mieux les paramètres en fonction d'une situation particulière de puits, par exemple en fonction de la température à laquelle le traitement doit être effectué.A person skilled in the art will know how to use the tables presented here to best choose the parameters as a function of a particular well situation, for example as a function of the temperature at which the treatment must be carried out.
L'un des avantages importants des compositions selon l'invention réside dans leur compatibilité avec les milieux salins.One of the important advantages of the compositions according to the invention lies in their compatibility with saline environments.
On sait en effet que la présence de sels (NaCl, eau de mer, et surtout sels multivalents tels calcium et magnésium) provoque de très sérieux ennuis lors d'un traitement selon l'art antérieur, par exemple à l'aide d'un polyacrylamide. Avec de tels polymères, un traitement ne peut pas être effectué en présence de plus de 400 ou 500 ppm de sels de Ca ou Mg.It is known in fact that the presence of salts (NaCl, seawater, and especially multivalent salts such as calcium and magnesium) causes very serious problems during a treatment according to the prior art, for example using a polyacrylamide. With such polymers, a treatment cannot be carried out in the presence of more than 400 or 500 ppm of Ca or Mg salts.
Les compositions selon l'invention, au contraire, peuvent être utilisées en présence de plusieurs % de sels, meme de calcium, ou dans de l'eau de mer ce qui ouvre le domaine "off-shore" (forages en mer). The compositions according to the invention, on the contrary, can be used in the presence of several% of salts, even of calcium, or in sea water which opens up the "off-shore" field (drilling at sea).
TABLEAU I
Température d'essai 55 C (131 F)
Essai No 1 2 3 4 5 6 7
NaCl 1 % "LOCRON" 3 %
UREE (%) 6 5 4 3 2,5 2 1,5
5j GG GG NG NG NG NG NG 6j n n " 1
7j " " GG " " " "
8j " " " " " " "
9j " " " " " " "
10j " " " Cl Cl " "
11j " " " GG GG " "
14j " " " " " Cl "
17j " " " " " GG "
18j " " " " " " Cl
TABLEAU I (suite 1)
Température d'essai 55 C (131 F)
Essai No 9 10 11 12 13 14 15
NaCl 1 % "LOCRON" 3 %
UREE (%) 6 5 4 3 2,5 2 1,5
5j NG NG NG NG NG NG Cl
6j " " " " " " GG
7j " " " " " GG "
8j " " " " Cl " "
9j " " " " GG " "
12j " " Cl GG " " "
13j " " GG " " " "
TABLEAU I (suite 2)
Température d'essai 55 C (131 F)
Essai No 20 21 22 23 24 25 26
NaCl 3 % "LOCRON" 3 %
UREE (t) 6 5 4 3 2,5 2 1,5
5t GG GG NG NG NG NG NG
6j " " Cl " " " "
7j " " GG Cl " " "
lot " " " QG GG Cl "
11j " " " " " GG "
12j " " " " " " Cl
13j " " " " " " Cl
14j " " " " " " GG
TABLEAU I (suite 3)
Température d'essai 55 C (131 F)
Essai No 29 30 31 32 33 34 35
NaCl 3 % "LOCRON" 6 5 4 3 2,5 2 1,5
UREE (%) 3 %
5j NG NG NG NG NG NG Cl
6j " " " " " " WG
7j " " " " " " WG
8j " " " Cl " Cl "
9j " " " " GG GG "
12j " " Cl GG " " "
13j " " WG " " " "
TABLEAU II
Température d'assai 55 C (150 F)
Essai No 1 2 3 4 5 6 7 8 9
NaCl 1 % "LOCRON" (%) 3 3 3 3 3 2,5 2 1.5 1
UREE (t) 3 2.5 2 1.5 1 3 3 3 3
18h NG NG NG NG NG NG NG NG NG
25h " " " " " " " " WG
39h " " " " " " C C WG
45h " " " " " " GG GG WG
48h " " " " " WG QG WG
63h C " " " " GG BG BG WG
66h GG " " " " GG S S WG
68h GG " " " " GG "
71h GG C " " " GG "
88h GG GG C " S
93h GG GG C " " "
95h GG GG SG " " "
134h GG GG Cl "
14Oh S S S GG Cl S S S WG
164h S S S GG NG S S S WG
TABLEAU II (suite)
Température d'essai 55 C (150 F)
Essai No 10 11 12 13 14 15 16 17 18
NaCl 3 % "LOCRON" (%) 3 3 3 3 3 2,5 2 1,5 1
UREE (%) 3 2.5 2 1.5 1 3 3 3 3
18h NG NG NG NG NG NG NG NG C
25h " " " " " " " C C
39h " " " " " C C C C
45h " " " " " GG GG WG WG
48h C " " " " GG GG WG WG
63h GG GG " " " GG GG WG WG
66h GG GG " " " BG BG " "
68h GG GG " " " S S " "
71h GG GG C " " " "
88h GG GG GG C " " "
93h C n " "
134h BG BG BG BG GG "
140h 8 8 8 s GG " n
164h S S S S GG S S WG WG
TABLEAU III
Température d'essai 70 C (158 F)
Essai No 1 2 3 4 5 6 7
NaCl 1 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 18h NG NG NG NG NG NG NG 20h " " " " " " C 24h " " " " " C GG 26.5h n n n n " GG 32h " " " " " " " 41h GG C " " " " " 45.5h " GG C " " " " 50.5h " " GG " " " " 65h " " " C " " " 69.5h " " " GG " " " 73h n n H n n n n
TABLEAU III (suite)
Température d'essai 70 C (158 F)
Essai No 10 11 12 13 14 15 16
NaCl 3 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 18h NG NG NG NG NG NG NG 20h n n n n n C " 22.5h n n n n n 28h WG C " " " " " 32h GG C " " " " " 41h " GG GG " " " " 45.5h n " n C n n n 50.5h n n " " " " " 65h n H n GG " " 73h n " n M n n "
TABLEAU IV
Température d'essai 70 C (167 F)
Essai No 1 2 3 4 5 6 7
NaCl 1 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 14h NG NG NG NG NG GG GG 17.5h n n n n n n 20h GG " " " " n 22.5h " " " 23.5h " C " 24h " C C " " S S 26h " GG GG Cl Cl " 27h n n n " n 28.5h " " " " " " " 29.5h " " n C " " " 38h " " " GG " " " 43.5h " " " " WG " "
TABLEAU IV (suite)
Température d'essai 75 C (167 F)
Essai No 10 11 12 13 14 15 16
NaCl 3 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 14h GG C NG NG NG GG GG 17.5h n GG C n n n n 20h n n GG " n S 22.5h H n n C " N n n 23.5h n n n n n n n 24h n n n H n n n 26h n n n GG n n 27h n n n n n n " 29.5h n n n n n n n 38h n n n n GG n n
TABLEAU V
Température d'essai 79 C (174 F)
Essai No 1 2 3 4 5 6 7
NaCl 1 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 7h NG NG NG NG NG NG NG 8.5h " " " " C C 9h " " " " " GG GG 10h " " " " " " " 12h C " " " " " " 13h GG C C " " " " 13.5h " GG " " " n 14h " " " " " " " 15.5 " " GG " " " " 16h " " " C " " " 24h " " " GG " " " 26h " " " " GG " "
TABLEAU V (suite)
Température d'essai 79 C (174 F)
Essai No 10 11 12 13 14 15 16
NaCl 3 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (t) 3 2.5 2 1.5 1 3 3 7h NG NG NG NG NG GG 8.5h " " " " " " " 9h C C " n n n n 10h GG n n n n n 12h n GG C n n 13h n n WG n n n n 14.5h n " GG C " " " 15.5 " " " GG " " " 16h n n n n n " " 24h n n n n GG n n
TABLEAU VI
Température d'essai 90 C (194 F)
Essai No 1 2 3 4 5 6 7
NaCl 1 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3
5h NG NG NG NG NG NG NG
6h GG C " " " GG GG
7h " GG " " " " "
8h " " GG " " " "
9h " " " C " " " 10h " " " GG " " " 14h " " " " WG " "
TABLEAU VI (suite)
Température d'essai 90 C (194 F)
Essai No 10 11 12 13 14 15 16
NaCl 3 % "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3
5h NG NG NG NG NG C C
6h GG C C " " GG GG
7h " GG C " " " "
8h " " GG C " " "
9h " " " GG " " " 14h " " " " WG " "
TABLEAU VII
Eau de mer
COMPOSANT CONCENTRATION (g/l)
NaCl 24,53
MgCl2,6H2O 11,1
Na2SO4,10H20 9,3
CaC12,2H20 1,54
KC1 0,70
NaHCO3 0,20
KBr 0,10
H3BO3 0,03
SrC12,6H20 0,04
NaF 0,003 pH - 8 environ
TABLEAU VIII 80 C (176 F) ; 3 % "LOCRON" 3 % Urée
No 1 2 3 4 5 6 7
NaCl t 1 2 4 6 8 10 Eau de
CaCl % 0 0 0 0 0 0 Mer
3h Cl Cl Cl Cl Cl Cl C
5h " " " " " " GG
6h " " " C WG WG "
7h n n C WQ n
9h " " WG " " " " 24h GG WG " " " " "
TABLEAU VIII (suite) 80 C (176 F) ; 3 % "LOCRON" 3 % Urée
No 8 9 10 11 12 13
NaCl % 0 0 4 4 8 8
CaCl2 % 1 2 1 2 1 2
3h Cl Cl Cl Cl Cl Cl
5h " " " " " "
6h " " " " C C
7h " " " C WG WG
9h " " WG WG " " 24h WG WG " " " "
TABLEAU IX
80 C (176 F) ; "LOCRON" 3 %
No 1 2 3 4 5 6 7 "LOCRON" 3 3 3 3 3 3 3
NaCl (%) 1 %
H.T (ppm) 100 200 300 400 500 700 800
2h NG NG NG NG NG C C
2.5h " " " " " " "
3h " " " " " GG GG
5h n n n n C n "
6h n n n n WG n n
7h n n n n GG n n 15.5h NG NG NG C " GG GG 24h " " " " " " " 48h " " " " " " " 100h n n n n " " "
Note : HT - hexamethylènetetramine
TABLEAU IX (suite 1)
No 8 9 10 11 12 13 14 "LOCRON" % 3 3 3 3 3 3 3
NaCl (%) 1 %
H.T (%) 0.1 0.15 0.2 0.25 0.5 1 1.5 0.75 NG NG NG NG NG NG 1h " " " " " C 1.5h " " " " " WG 1.75h C C C " C GO 2h GG GG GG C WG 2.5h " n " GG GG 3h n n n " " " 5h " " " " " " 6h n n n n n n
TABLEAU IX (suite 2)
No 15 16 17 18 19 20 "LOCRON" % 3 3 3 3 3 3
NaCl (%) 1 %
H.T (%) 2 2.5 3 4 5 6 0.75h C C C C WG GG 1h WG GG GG GG GG " 1.5h GG " " " " TABLE I
Test temperature 55 C (131 F)
Trial No 1 2 3 4 5 6 7
NaCl 1% "LOCRON" 3%
UREE (%) 6 5 4 3 2.5 2 1.5
5d GG GG NG NG NG NG NG 6d nn "1
7d "" GG """"
8d """""""
9d """""""
10d """ClCl""
11d """GGGG""
14d """""Cl"
17d """""GG"
18d """""" Cl
TABLE I (continued 1)
Test temperature 55 C (131 F)
Trial No 9 10 11 12 13 14 15
NaCl 1% "LOCRON" 3%
UREE (%) 6 5 4 3 2.5 2 1.5
5d NG NG NG NG NG NG Cl
6d """""" GG
7d """""GG"
8d """" Cl ""
9d """" GG ""
12d "" Cl GG """
13d "" GG """"
TABLE I (continued 2)
Test temperature 55 C (131 F)
Trial No 20 21 22 23 24 25 26
NaCl 3% "LOCRON" 3%
UREE (t) 6 5 4 3 2.5 2 1.5
5t GG GG NG NG NG NG NG
6d "" Cl """"
7d "" GG Cl """
lot """HQ GG Cl"
11d """""GG"
12d """""" Cl
13d """""" Cl
14d """""" GG
TABLE I (continued 3)
Test temperature 55 C (131 F)
Trial No 29 30 31 32 33 34 35
NaCl 3% "LOCRON" 6 5 4 3 2.5 2 1.5
UREE (%) 3%
5d NG NG NG NG NG NG Cl
6d """""" WG
7d """""" WG
8d """Cl" Cl "
9d """" GG GG "
12d "" Cl GG """
13d "" WG """"
TABLE II
Test temperature 55 C (150 F)
Trial No 1 2 3 4 5 6 7 8 9
NaCl 1% "LOCRON" (%) 3 3 3 3 3 2.5 2 1.5 1
UREE (t) 3 2.5 2 1.5 1 3 3 3 3
6 p.m. NG NG NG NG NG NG NG NG NG
25h """""""" WG
39h """""" CC WG
45h """""" GG GG WG
48h """""WG HQ WG
63h C """" GG BG BG WG
66h GG """" GG SS WG
68h GG """" GG "
71h GG C """GG"
88h GG GG C "S
93h GG GG C """
95h GG GG SG """
134h GG GG Cl "
14Oh SSS GG Cl SSS WG
164h SSS GG NG SSS WG
TABLE II (continued)
Test temperature 55 C (150 F)
Trial No 10 11 12 13 14 15 16 17 18
NaCl 3% "LOCRON" (%) 3 3 3 3 3 2.5 2 1.5 1
UREE (%) 3 2.5 2 1.5 1 3 3 3 3
6 p.m. NG NG NG NG NG NG NG NG C
25h """""""CC
39h """""CCCC
45h """""GG GG WG WG
48h C """" GG GG WG WG
63h GG GG """GG GG WG WG
66h GG GG """BGBG""
68h GG GG """SS""
71h GG GG C """"
88h GG GG GG C """
93h C n ""
134h BG BG BG BG GG "
140h 8 8 8 s GG "n
164h SSSS GG SS WG WG
TABLE III
Test temperature 70 C (158 F)
Trial No 1 2 3 4 5 6 7
NaCl 1% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 18h NG NG NG NG NG NG NG 20h """""" C 24h """""C GG 26.5hnnnn" GG 32h """""""41h GG C """""45.5h" GG C """" 50.5h "" GG """" 65h """C""" 69.5h """GG""" 73h nn H nnnn
TABLE III (continued)
Test temperature 70 C (158 F)
Trial No 10 11 12 13 14 15 16
NaCl 3% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 6 p.m. NG NG NG NG NG NG NG 20h nnnnn C "22.5hnnnnn 28h WG C""""" 32h GG C """""" 41h "GG GG""""" 45.5 hn "n C nnn 50.5hnn""""" 65h n H n GG "" 73h n "n M nn"
TABLE IV
Test temperature 70 C (167 F)
Trial No 1 2 3 4 5 6 7
NaCl 1% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 14h NG NG NG NG NG GG GG 17.5hnnnnnn 20h GG """" n 22.5h "" 23.5h "C" 24h "CC""SS26h" GG GG Cl Cl "27h nnn" n 28.5h """""""29.5h""nC""" 38h """GG""" 43.5h """" WG ""
TABLE IV (continued)
Test temperature 75 C (167 F)
Trial No 10 11 12 13 14 15 16
NaCl 3% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 14h GG C NG NG NG GG GG 17.5hn GG C nnnn 20h nn GG "n S 22.5h H nn C" N nn 23.5hnnnnnnn 24h nnn H nnn 26h nnn GG nn 27h nnnnnn "29.5hnnnnnnn 38h nnnn GG nn
TABLE V
Test temperature 79 C (174 F)
Trial No 1 2 3 4 5 6 7
NaCl 1% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3 7h NG NG NG NG NG NG NG 8.5h """" CC 9h """""GG GG 10h""""""" 12h C """""" 13h GG CC """" 13.5h "GG""" n 14h """""""15.5""GG""""16h""" C """24h""" GG """26h"""" GG ""
TABLE V (continued)
Test temperature 79 C (174 F)
Trial No 10 11 12 13 14 15 16
NaCl 3% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (t) 3 2.5 2 1.5 1 3 3 7h NG NG NG NG NG GG 8.5h """""""9hCC" nnnn 10h GG nnnnn 12h n GG C nn 13h nn WG nnnn 14.5hn "GG C"""15.5""" GG """16hnnnnn""24h nnnn GG nn
TABLE VI
Test temperature 90 C (194 F)
Trial No 1 2 3 4 5 6 7
NaCl 1% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3
5h NG NG NG NG NG NG NG
6h GG C """GG GG
7h "GG"""""
8h "" GG """"
9h """C""" 10h """GG""" 14h """" WG ""
TABLE VI (continued)
Test temperature 90 C (194 F)
Trial No 10 11 12 13 14 15 16
NaCl 3% "LOCRON" (%) 3 3 3 3 3 2.5 2
UREE (%) 3 2.5 2 1.5 1 3 3
5h NG NG NG NG NG CC
6h GG CC "" GG GG
7h "GG C""""
8h "" GG C """
9:00 am """GG""" 2:00 pm """" WG ""
TABLE VII
Sea water
COMPONENT CONCENTRATION (g / l)
NaCl 24.53
MgCl2,6H2O 11.1
Na2SO4.10.1020 9.3
CaC12,2H20 1.54
KC1 0.70
NaHCO3 0.20
KBr 0.10
H3BO3 0.03
SrC12.6H20 0.04
NaF 0.003 pH - about 8
TABLE VIII 80 C (176 F); 3% "LOCRON" 3% Urea
No 1 2 3 4 5 6 7
NaCl t 1 2 4 6 8 10 Water
CaCl% 0 0 0 0 0 0 Sea
3h Cl Cl Cl Cl Cl Cl C
5h """""" GG
6h """C WG WG"
7h nn C WQ n
9h "" WG """" 24h GG WG """""
TABLE VIII (continued) 80 C (176 F); 3% "LOCRON" 3% Urea
No 8 9 10 11 12 13
NaCl% 0 0 4 4 8 8
CaCl2% 1 2 1 2 1 2
3h Cl Cl Cl Cl Cl Cl
5h """"""
6h """" CC
7h """C WG WG
9h "" WG WG "" 24h WG WG """"
TABLE IX
80 C (176 F); "LOCRON" 3%
No 1 2 3 4 5 6 7 "LOCRON" 3 3 3 3 3 3 3
NaCl (%) 1%
HT (ppm) 100 200 300 400 500 700 800
2h NG NG NG NG NG CC
2.5h """""""
3h """""GG GG
5h nnnn C n "
6h nnnn WG nn
7h nnnn GG nn 15.5h NG NG NG C "GG GG 24h""""""" 48h """""""100hnnnn"""
Note: HT - hexamethylènetetramine
TABLE IX (continued 1)
No 8 9 10 11 12 13 14 "LOCRON"% 3 3 3 3 3 3 3
NaCl (%) 1%
HT (%) 0.1 0.15 0.2 0.25 0.5 1 1.5 0.75 NG NG NG NG NG NG 1h """""C1.5h""""" WG 1.75h CCC "C GO 2h GG GG GG C WG 2.5h" n " GG GG 3h nnn """5h""""""6h nnnnnn
TABLE IX (continued 2)
No 15 16 17 18 19 20 "LOCRON"% 3 3 3 3 3 3
NaCl (%) 1%
HT (%) 2 2.5 3 4 5 6 0.75h CCCC WG GG 1h WG GG GG GG GG "1.5h GG""""
Claims (2)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR868606434A FR2598144B2 (en) | 1986-04-30 | 1986-04-30 | PROCESS FOR DELAYING AND CONTROLLING THE FORMATION OF GELS OR PRECIPITIES OF ALUMINUM DERIVATIVES, CORRESPONDING COMPOSITIONS AND APPLICATIONS IN PARTICULAR FOR THE EXPLOITATION OF OIL WELLS. |
| EP86108492A EP0210427A1 (en) | 1985-07-02 | 1986-06-21 | Process for retarding and controlling the formation of gels or precipitates derived from aluminium and corresponding compositions, plus the corresponding applications - in particular regarding oil wells |
| CA000512754A CA1282667C (en) | 1985-07-02 | 1986-06-30 | Process for retarding and controlling the formation of gels or precipitates derived from aluminum and corresponding compositions, plus the corresponding applications - in particular regarding oil wells |
| SU864027789A SU1514244A3 (en) | 1985-07-02 | 1986-07-01 | Method of producing aluminium hydroxide for plugging porous subterranean strata in oil production |
| NO862647A NO862647L (en) | 1985-07-02 | 1986-07-01 | PROCEDURE FOR RETARDING AND CONTROL OF THE GELING OR FELLOWS DETAILED FROM ALUMINUM AND SIMILAR MIXTURES, PLUS SIMILAR APPLICATIONS, SPECIFICALLY IN CONNECTION WITH OIL BROWNS. |
| US06/881,147 US4889563A (en) | 1985-07-02 | 1986-07-02 | Process for retarding and controlling the formation of gels or precipitates derived from aluminium and corresponding compositions, plus the corresponding applications-in particular regarding oil wells |
| JP61316061A JPS62256722A (en) | 1986-04-30 | 1986-12-26 | Method of controlling and delaying formation of gel or sediment derived from aluminum and corresponding compositionand application to oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR868606434A FR2598144B2 (en) | 1986-04-30 | 1986-04-30 | PROCESS FOR DELAYING AND CONTROLLING THE FORMATION OF GELS OR PRECIPITIES OF ALUMINUM DERIVATIVES, CORRESPONDING COMPOSITIONS AND APPLICATIONS IN PARTICULAR FOR THE EXPLOITATION OF OIL WELLS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2598144A2 true FR2598144A2 (en) | 1987-11-06 |
| FR2598144B2 FR2598144B2 (en) | 1990-09-14 |
Family
ID=9334902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR868606434A Expired - Lifetime FR2598144B2 (en) | 1985-07-02 | 1986-04-30 | PROCESS FOR DELAYING AND CONTROLLING THE FORMATION OF GELS OR PRECIPITIES OF ALUMINUM DERIVATIVES, CORRESPONDING COMPOSITIONS AND APPLICATIONS IN PARTICULAR FOR THE EXPLOITATION OF OIL WELLS. |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62256722A (en) |
| FR (1) | FR2598144B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380151A1 (en) * | 1989-01-27 | 1990-08-01 | Pumptech N.V. | Delayed rigid foam systems and applications in particular for plugging - selective treatments in the oil industry |
| EP0380150A1 (en) * | 1989-01-27 | 1990-08-01 | Pumptech N.V. | Delayed rigid foam systems and applications in particular for selective plugging treatments in the oil industry |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4756782B2 (en) * | 2001-07-12 | 2011-08-24 | 大明化学工業株式会社 | Method for producing α-alumina |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2898306A (en) * | 1956-05-08 | 1959-08-04 | Socony Mobil Oil Co Inc | Preparation of alumina gels |
| US3614985A (en) * | 1970-03-30 | 1971-10-26 | Shell Oil Co | Plugging a subterranean formation by homogeneous solution precipitation |
| GB1268361A (en) * | 1968-03-18 | 1972-03-29 | Cawood Wharton & Co Ltd | Improvements in or relating to refractory or ceramic shapes |
| FR2150637A1 (en) * | 1971-09-03 | 1973-04-13 | Chevron Res | Maintaining formation permeability withhydro |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1427708A (en) * | 1972-10-04 | 1976-03-10 | Zirconal Processes Ltd | Rigid coherent gel |
| JPS5812932B2 (en) * | 1977-06-30 | 1983-03-10 | 日本ゼオン株式会社 | Hollow fiber manufacturing method |
| JPS5717425A (en) * | 1980-06-30 | 1982-01-29 | Sumitomo Alum Smelt Co Ltd | Manufacture of readily acid-soluble aluminum hydroxide and basic aluminum salt solution |
-
1986
- 1986-04-30 FR FR868606434A patent/FR2598144B2/en not_active Expired - Lifetime
- 1986-12-26 JP JP61316061A patent/JPS62256722A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2898306A (en) * | 1956-05-08 | 1959-08-04 | Socony Mobil Oil Co Inc | Preparation of alumina gels |
| GB1268361A (en) * | 1968-03-18 | 1972-03-29 | Cawood Wharton & Co Ltd | Improvements in or relating to refractory or ceramic shapes |
| US3614985A (en) * | 1970-03-30 | 1971-10-26 | Shell Oil Co | Plugging a subterranean formation by homogeneous solution precipitation |
| FR2150637A1 (en) * | 1971-09-03 | 1973-04-13 | Chevron Res | Maintaining formation permeability withhydro |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380151A1 (en) * | 1989-01-27 | 1990-08-01 | Pumptech N.V. | Delayed rigid foam systems and applications in particular for plugging - selective treatments in the oil industry |
| EP0380150A1 (en) * | 1989-01-27 | 1990-08-01 | Pumptech N.V. | Delayed rigid foam systems and applications in particular for selective plugging treatments in the oil industry |
| FR2642467A1 (en) * | 1989-01-27 | 1990-08-03 | Schlumberger Cie Dowell | DELAYED RIGID FOAM SYSTEMS AND APPLICATIONS IN PARTICULAR TO SELECTIVE CLAMPING TREATMENTS IN THE PETROLEUM INDUSTRY |
| FR2642468A1 (en) * | 1989-01-27 | 1990-08-03 | Schlumberger Cie Dowell | FOAM SYSTEMS FOR SELECTIVELY CLAMPING UNDERGROUND FORMATIONS, ESPECIALLY AROUND PETROLEUM WELLS |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62256722A (en) | 1987-11-09 |
| FR2598144B2 (en) | 1990-09-14 |
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