High-penetration grouting mortar. RU patent 2513220.
 Composition and method for diverting injected fluids to achieve improved hydrocarbon fluid recovery / 2511444Invention relates to compositions and methods which can be used to improve oil recovery. Disclosed is a composition which contains expandable cross-linked polymeric microparticles having an unexpanded volume average diameter of 0.05-5000 mcm and cross-linking agent content of 100-200000 ppm of hydrolytically labile silyl ester or silyl ether cross-linking agents. Also disclosed is a method of improving recovery of hydrocarbon fluids using said composition. |
 Method of aluminium powder activation / 2509790Invention relates to powder metallurgy, particularly, to activation of disperse aluminium powder combustion and can be used in various branches of industry. Proposed method comprises impregnation of initial powder with activator based on vanadium oxide compound. Gel is used as said activator containing 4.0-8.2 g/l of vanadium obtained by melting of vanadium oxide or vanadium oxide and lithium or sodium carbonate or vanadium oxide and boric acid or mix thereof with subsequent addition of the melt to distilled water at intensive mixing and curing. Initial aluminium powder is impregnated with said gel at gel-to-aluminium powder ratio making 2 ml:1 g. Then produced mass is filtered at vacuum filter and dried at 50-60°C for 0.5-1 h. |
|
Foaming aqueous composition / 2509096 Foaming aqueous composition, which contains a foaming agent which contains at least one surfactant, contains triethanolamine oleic acid soap and disubstituted sodium phosphate, with the following ratio of components, wt %: foaming agent 9.0-31.0, triethanolamine oleic acid soap 0.2-6.0, disubstituted sodium phosphate 0.2-2.0, water - the balance. |
 Method of regenerating hydrate inhibitor / 2508308Invention relates to a method of producing a lean liquid hydrate inhibitor composition from a rich liquid hydrate inhibitor composition in which the liquid hydrate inhibitor is characterised by a boiling point above that of water. According to the invention, two lean inhibitors are obtained, one free of salt and the other containing salt. |
 Grouting mortar for cementing horizontal holes / 2508307Proposed grouting mortar comprises grouting Portland cement PTTS- IG-CC-1, fluid loss reducing agent HYDROTSEM, supersoftener - polyether carboxylate Melflux F or sulphuretted melamine-phenolic resin TSEMPLAST MF, antifoamer POLITSEM DF and setting accelerator, i.e. calcium chloride, and water. It differs from known compositions in that it includes extra mineral additive, i.e. metakaolin or Meta-Mix-1, or CON MIX SF1, or MIKRODUR, at the following ratio of components. Wt %: PTTS IG-CC-1 - 93.35-98.9, HYDROTSEM - 0.1-0.5, said csupersoftener - 0.05-0.3, POLITSEM DF - 0.1-0.3, said mineral additive - 0.5-1.0, calcium chloride - 0.1-2.0, water to water-cement ratio of 0.45-0.55. |
 Method of formation hydraulic fracturing / 2507389Method includes filling formation with mixture of fracturing liquid with proppant agent. As proppant agent gas crystallohydrates are used. Filling is performed under thermobaric conditions of existence of gas crystallohydrates. After formation fracture gas crystallohydrates are decomposed with extraction of gaseous phase additional to splitting macro and micro-cracks of formation fracture. Filling of fracturing liquid mixture with proppant agent, formation fracture and crystallohydrates decomposition are performed one or several times. |
 Method of submerged reservoirs processing / 2507387Method of processing for dissolution of acid-soluble material and solubilisation of hydrocarbons, emulsions and water barriers comprises the following jobs. Injection of micellar dispersion in the bed, said dispersion is a Winsor micro emulsion IV containing water, one or several precursors of organic acids, one or several surfactants and, not necessarily, one or several substances selected from salts, auxiliary surfactants and/or organic fluids which are not precursors of organic acids. Solubilisation is performed of micellar dispersion of hydrocarbons, emulsions or water barriers present in the bed and in-situ hydrolysis of, at least, a portion of organic acid precursor to produce sufficient amount of organic acid to cause notable dissolution of acid-soluble material present in filtration crests or nearby them, or other damage in the bed. Hydrolysis of organic acid precursor brings about the production of at least one of formic, acetic, hydroxiacetic and lactic acids. Organic acid precursor concentration makes at least 1 wt %. Well shutdown after introduction of micellar dispersion makes 0.5 h or more. |
 Low-density grouting mortar / 2507380Low-density grouting mortar contains astringent, light filler, super plasticiser C-3, nitrile trimethyl phosphonic acid - NTF and water. Said binder represents high-water-absorption finely ground binder with specific surface of 20000-25000 cm2/g - "Microdur" or INTRATSEM while light filler is composed of hollow glass microspheres. Said components are present at the following ratio, wt %: high-water-absorption finely ground binder - 100, hollow glass microspheres - 10-100, NTF - 0.07-0.25, super plasticiser C-3 - 0.2-1.3, water - 150-320. |
 Solidifying compositions containing natural puzzolana and method related therewith / 2507379Proposed method of cementing comprises injection of cementing composition in underground stratum. Note here that cementing composition comprises: ground Portland cement is mixed with burned shale, cement kiln dust, natural puzzolana and water and solidified. Used cementing composition contains aforesaid components. Invention is developed in dependent claims. |
|
Method of water production zones isolation in well / 2507377 Proposed method comprises preparation and injection into well of the mix of 100 wt % of organosilicon fluid (OSF) and 50-100 wt % of 0.5%-solution of polyacrylamide DP9-8177 with reinforcement additive composed by 0.1-1.0 wt % of fibers. |
|
Drilling foam composition / 2268283 Foam composition comprises surfactant, foam stabilizer, water, water hardness control additive and lubricant. The water hardness control additive is sodium silicate. The lubricant is VNIINP-117 emulsion. The foam stabilizer is polyacrylamide, the surfactant is sulphonole. All above components are taken in the following amounts (% by weight): sulphonole - 0.8-1.5, sodium silicate - 0.2-0.5, polyacrylamide - 0.1-0.5, VNIINP-117 - 0.5-2, remainder is water. |
|
Drilling mud / 2268909 Drilling mud contains the following components, mass-%: clay, 1.5-3.0; carboxymethyl cellulose, 0.1-0.3;carboxymethyl starch, 0.75-1.5; mixture of ethers and amides of fatty acids and ethanol amides, 0.75-1.0; product of rectification of propylene oligomers of isoolefin type, fraction C13-C15, 0.75-1.5;lubricating additive, 0.5-3.0; the remainder being water. |
|
Lubricating additive for water-based drilling fluids / 2269562 Invention relates to drilling fluids used when boring oil and gas wells. Lubricating additive contains 10-30% tall oil, 15-20% polyglycols, 40-50% oxal flotation reagent, and 15-20% beet molasses. |
|
Composition for treating well bottom zone of carbonate formation wells / 2269563 Invention relates to oil production technology involving use of hydrochloric acid-based chemicals via complex hydrochloric acid effect on well bottom zone to intensify oil production and may be specifically used to increase oil recovery of viscous oil-saturated low-permeable carbonate reservoirs. Composition contains 22-28% of 20 vol % aqueous HCl solution, 7-8% of 98% aqueous acetic acid solution, and 65-70% of solvent based on light pyrolysis tar obtained as secondary product from petroleum processing enterprises. |
|
Multiple-purpose reagent for process liquids used in boring operation and in pullout of holes / 2271378 Multiple-purpose reagent containing lubrication-and-stabilization component (70-80%) and solvent (20-30%) contains, as said lubrication-and-stabilization component, oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons at ratio 2:3:4, and, as said solvent, diesel fuel or kerosene. |
|
Multiple-purpose reagent for process liquids used in boring operation and in pullout of holes / 2271378 Multiple-purpose reagent containing lubrication-and-stabilization component (70-80%) and solvent (20-30%) contains, as said lubrication-and-stabilization component, oxidized mixture of paraffins, naphthenic and aromatic hydrocarbons at ratio 2:3:4, and, as said solvent, diesel fuel or kerosene. |
|
Biocationic drilling fluid / 2272824 Invention provides water-based solid phase-free biocationic drilling fluid with density 10-70-1520 kg/m3. Drilling fluid contains 10-60% of a cation spectrum, namely calcium and sodium chlorides, and 0.1-2% of polymer additive, in particular xanthane series biopolymer. |
|
Salt-saturated plugging composition for high-temperature holes / 2273654 Invention relates to materials used for cementing oil, gaseous, gas-condensate and geothermal holes under conditions of saline and hydrogen sulfide media. The salt-saturated plugging composition for high-temperature holes comprising a binding agent and sodium chloride includes additionally swollen vermiculite sand of fraction 0.3-2.5 mm in the following ratio of components, wt.-%: binding agent, 85-90; sodium chloride, 8-10; swollen vermiculite sand of fraction 0.3-2.5 mm, the balance. Invention provides preparing impermeable cement stone with enhanced coupling strength with a column in the range of temperatures 50-110°C. |
 Polymer-clay fluid for drilling well in permafrost rock / 2274651Invention relates to drilling oil and gaseous wells, in particular, to polymer-clay fluids for drilling used under conditions of permafrost rocks. Proposed polymer-clay fluid shows the improved pseudoplastic properties providing enhancing retaining and transporting capacity and treatment degree of the well walls, diminished filtration due to high rate in formation of low-penetrable filtration crust preventing the well pollution and promoting to retention of its collector properties, reduced rate of warming up of permafrost rocks that prevents formation of caverns and destruction of the well walls and as result provides prolonged retention of the well trunk in the stable state. Polymer-clay fluid for wells drilling in permafrost rocks doesn't freeze at negative temperatures and comprises clay, stabilizing agent as a mixture of polysaccharide reagent and structure-forming agent, hydrocarbon antifreeze and water. As a polysaccharide reagent the polymer-clay fluid comprises Acinetobacter sp. biopolymer, and as a structure-forming agent it comprises condensed sulfite-alcohol distillery grains in the following ratio of components, wt.-%: clay, 6-8; condensed sulfite-alcohol distillery grains, 4-6; Acinetobacter sp. biopolymer, 2-4; hydrocarbon antifreeze, 7-19, and water, the balance, wherein the ratio of Acinetobacter sp. biopolymer and condensed sulfite-alcohol distillery grain = 1:(1-3) mas. p., respectively. As hydrocarbon antifreeze, polymer-clay fluid comprises carbamide or glycerol. Invention provides enhancing effectiveness in drilling of wells in permafrost rocks. |
 Flowing well killing method / 2275497Method involves blocking perforation interval and part of well bottom zone by replacing well fluid with blocking fluid and killing liquid arranged over the blocking one. Free gas is removed from well before blocking fluid delivery to well bottom. Necessary liquid level at well head is provided by well operation stoppage for a certain time, which provides termination of formation fluid degassing in well bore and free gas lifting to well head. Tube space and hole annuity is filled with liquid in several steps along with discharge of gas portions. Gas portion discharge may not result in formation fluid rise inside well bore to level of formation fluid degassing. Density of liquid to be added in tube space and hole annuity provides well filling to head thereof. Well killing liquid comprises industrial magnesium chloride, alkali or alkaline-earth metal hydrate, alkali metal carbonate and pore sealant, for instance cacao-bean pods and fresh water taken in predetermined ratio. |
FIELD: chemistry.
SUBSTANCE: invention relates to oil and gas industry, particularly well repairing and casing, and can be used in remedial cementing for sealing off extraneous water and gas overflow channels in the cement column outside the production casing. The grouting mortar contains, pts.wt per 100 pts.wt microcement CS BTRUO Micro: filtrate reducer PF-BMC 0.25-0.75, setting retarder ZS BMC 0.50-3.00, microsilica MK-85 0.00-10.00, antifoaming agent 0.10-0.30, fresh water 70.0-80.0.
EFFECT: wider range of high-tech grouting mortars with high penetrating power and ultra-low water loss designed for remedial cementing.
2 tbl, 1 ex
The invention relates to the oil and gas industry, in particular to repair and mounting holes, and can be used for repair and isolation works in wells, for insulation of foreign waters and getoperationid channels in cement ring for operational column.
Known lightweight cement slurry [1 - analogue], including by mass: Portland 100, bentonite to 2, acetylcellulose 0,8-0,9 and water 80-100.
The disadvantage of cement slurry is the low penetration power in channels and pores insulated reservoir due to the low degree of dispersion of hydraulic binder.
Closest to the proposed technical solution is grouting mortar [2 prototype]including wt.%: Portland cement 64,41-66,24, alfacell 0,13-0,40, fume MK-85 0,33-1.99 and water 33,20-33,30.
The disadvantage of cement slurry is also low penetrating power in channels and pores insulated reservoir and high yield. High values of the index of water loss in downhole conditions can lead to significant filtering liquid mixing and premature zagustevaniya cement slurry.
These deficiencies can cause problems when you download composition into the well and reduce its efficiency.
When creating inventions was a task of development vysokopronitsaemogo cement slurry with a high level of technological qualities: low yield, low rheological characteristics, adjustable setting time in a wide range of temperatures, high strength of cement stone.
The technical result is the expansion of the range of high-tech cement slurries with high penetrating power and ultra-low-yield intended for repair and isolation works.
The solution of the problem is achieved by grouting mortar, including knitting, filtrate agent - hydroxyethyl cellulose, silica fume, and water, additionally contains zamedlitel shvatyvanija "CS-VIC", which is a mixture of sulfur-containing organic substances and mineral supplements and silicon - organic antifoam, which is "Cecil 201" or "Politeam", or "Basopur DF5", and as a binder contains cement mixture of BTREE "Micro" with specific surface not less than 900,0 m2 /kg, as of hydroxyethyl cellulose - reagent "PF-VIC", in the following ratio of components, parts per 100 parts by weight of microcemento CA, BTREE "Micro":
The reducer filter PF-VIC"
0,25-0,75
Zamedlitel shvatyvanija "CS-VIC"
0,50-3,00
Microsilica MK-85
0,00-10,0
Defoamer
0,10-0,30
Fresh water
70,0-80,0
For making cement slurry in the experiments we used the following materials and reagents:
- Cement mixture "CA BTREE" brand "Micro" produced according to TU 2458-066-54651030-2010, is a mixture of cement clinker and mineral admixtures, with a specific surface not less than 900,0 m2 /kg
- Filtrate agent "PF-VIC" produced according to TU 2458-085-54651030-2011, is a low viscosity, hydroxyethyl cellulose, providing its 1%aqueous solution viscosity of not more than 50 MPa·S.
- Zamedlitel shvatyvanija "CS-VIC" produced according to TU 2458-084-54651030-2011, is a mixture of sulfur-containing organic substances and mineral supplements.
- Antifoam "Cecil-201" is issued to OOO "NPF Technocracy" beyond 2251-003-9894-2484-2007, is an aqueous emulsion of silicone polymers.
- Antifoam "Politeam" is issued ZAO NPO "policell" beyond 2637-023-97457491-2010, is an aqueous emulsion of silicone polymers.
- Antifoam "Basopur DF 5" supplied by BASF, is alkoxycarbonyl fatty alcohol.
- "Fume condensed matter", produced according to TU 5743-048-02495332-96, is an ultra-fine powder-like material consisting of spherical particles, obtained in the process of gas cleaning furnaces in the production of silicon-containing alloys. The main component of the material is silicon dioxide amorphous modifications. Microsilica in the presence of moisture interacts with cement education hydrosilicate of calcium, which offers more advanced spatial structure.
- Fresh water.
Used in plugging the solution of complex zamedlitel shvatyvanija "CS-VIC" to regulate the hardening period when downhole temperatures up to 110 degrees C. in Addition, the LC-VIC" performs the function of plasticizer.
Enter in the composition of the cement slurry binder with high specific surface allows to increase penetration ability in channels and pores because of their higher degree of dispersion.
Enter in the composition of the cement slurry microsilica helps reduce sulphate corrosion of cement stone and increase its strength on compression.
The decreases in the amount of filtrate agent "PF-VIC", zamedlitel shvatyvanija "CS-VIC", microsilica, antifoam below these values, increases water loss, increase of rheological parameters, rapid zagustevaniya solution, foaming.
The increase in the content of filtrate agent "PF-VIC", zamedlitel shvatyvanija "CS-VIC", microsilica, antifoam above mentioned values, also leads to the increase of rheological indices, reducing the strength of cement stone.
The following are examples of preparation of cement compositions in laboratory conditions. Table 1 presents the composition of the studied cement slurries, and in table 2 their technological parameters.
The definition of the basic properties of cement slurries and stones carried out at a temperature of 75 degrees Celsius in accordance with the international standard ISO 10426-2 (specification API 10A). The density of the cement slurry was determined using the balance mud and cement slurries FANN 140. Plastic dynamic viscosity and shear stress was determined by using a rotational viscometer FANN 35SA at room temperature. The water loss solution was determined on the tester Chandler Engineering M 7120 at a temperature of 75 C and the pressure drop 69 ATM. Time of thickening the solution was determined on the consistometer Chandler Engineering M 7222 at a temperature of 75 C and a pressure of 150 ATM. Compressive strength of cement stone was determined on the ultrasonic analyzer strength Chandler Engineering M 4262 at a temperature of 75 C and the pressure 207 bar.
Tampon solutions prepared in the following way. If required by the recipe, cooked dry mixture of microcemento with microsilica in predetermined ratios. The necessary quantity of additives - zamedlitel shvatyvanija "CS-VIC", reducer filter PF-VIC", antifoam dissolved in water. Then the obtained water solution closing net microcement or dry mixture in a blender Chandler Engineering 3060 M.
Below is a sample preparation and testing of composition №4 of table 1 in the laboratory.
Example. For preparation of 2500 g vysokopronitsaemogo cement slurry (the number of the solution, sufficient for all kinds of research, composition №4 in table 1) you must take 1027,70 g of water (75 parts per 100 parts by weight of cement) and dissolving 23,98 g zamedlitel shvatyvanija "CS-VIC" (1,75 parts per 100 parts by weight of cement), then in the same water to dissolve 6,85 g reducer filter PF-VIC" (of 0.5 parts per 100 parts by weight of cement) and 2,74 g antifoam "Cecil-201" (of 0.2 parts by weight of 100 parts by weight of cement). To cook dry cement mixture of 1370,20 g microcemento CA, BTREE "Micro" (100 parts by weight of cement) and 68,50 g microsilica (5 parts per 100 parts by weight of cement). Composition (for 2 admission) shut 50 seconds in a blender Chandler Engineering 3060 M. Then determine the density. Rheological parameters are determined after kneading cement slurry in atmospheric consistometer at room temperature for 20 minutes Then, the solution is poured into a glass of consistometer Chandler Engineering M 7222 and determine the time of thickening at a temperature of 75 C and a pressure of 150 ATM. To determine water yield a solution fill in the collected cylinder tester Chandler Engineering M 7120 and determine the yield at a temperature of 75 C and the pressure drop 69 ATM. To determine the strength of a solution fill in the cell ultrasonic analyzer strength Chandler Engineering M 4262.
Prepared in the example, the composition has a density 1.64 g/cm 3 , plastic viscosity 44,2 MPa·s, dynamic shear stress 161 DPA, the time of thickening up to 70 Su - 250 min, yield for 30 minutes to 30.2 ml, compressive strength after 1 day - 20,3 MPa.
Examples of preparation and testing of compounds 1-3 and 5-7, are shown in table 1, the same algorithm.
The solution of the prototype was prepared in the laboratory according to the description and for him, as described in the example, were measured technological parameters.
As seen from table 2, we state grouting mortar has ultra-low-yield (declare 30,2 ml, and the prototype 435,3 ml). Plastic viscosity of cement slurry is 44.2 MPa·s and prototype 77,5 MPa·S. The increased content of silica fume increases the strength of the stone compression, but an increase in its content exceeding 10% by weight of microcemento provides the solution excessively high rates of dynamic shear stress, which may be undesirable.
The proposed cement solution allows to improve the quality of responsible operations on repair cementing due to the extremely low water availability cement slurry and low rates of rheology in combination with its high penetrating ability and high strength of cement stone.
Table 1Compositions vysokopronitsaemogo cement slurry
No. p/pMicrocement CA, BTREE "Micro"
Filtrate agent "PF-VIC"
Zamedlitel shvatyvanija "CS-VIC"
Defoamer
Microgramme-ZEM
WaterCecil-201
Politeam
Basopur DF5
(parts per 100 parts by weight of cement)
1 100 0,25 0,50 0,10 - - - 70,0 2 100 0,50 1,75 0,20 - - - 75,0 3 100 0,75 3,00 0,30 - - - 80,0 4 100 0,50 1,75 0,20 - - 5,00 75,0 5 100 0,50 1,75 0,20 - - 10,0 75,0 6 100 0,50 1,75 - 0,20 - 5,00 75,0 7 100 0,50 1,75 - - 0,20 5,00 75,0PROTOTYPE
8100 (cement grade (G)
0,42 (alfacell)
3,09 51,5 Table 2Properties of compositions vysokopronitsaemogo cement slurry, presented in table 1.
no part of table 1
Density, g/cm 3
Plastic viscosity, MPa·s
Dynamic shear stress, DPA
Podataka, cm 3 30 min
Time of thickening up to 70 Sun, HH:mm
Compressive strength, MPa, 1 day
Calculated
Measured
1 1,67 1,67 156,0 403 50,5 01:00 13,1 2 1,64 1,64 38,2 24 29,5 02:10 12,2 3 1,60 1,60 62,5 46 19,5 06:45 11,5 4 1,64 1,64 44,2 161 30,2 04:10 20,3 5 1,65 1,65 63,0 357 35,3 04:30 23,2 6 1,64 1,64 43,9 158 30,1 04:10 20,6 7 1,64 1,64 43,7 155 30,0 04:15 19,9PROTOTYPE
8 1,82 1,82 77,5 17,1 435,3 03:10 20,4Sources of information
1. Patent RU 2085702 C1, E21B 33/138 published 27.07.1997, is similar.
2. Patent RU 2322471 C1, C09K 8/467 published 20.04.2008, prototype.
Grouting mortar containing astringent, filtrate agent - hydroxyethyl cellulose, silica fume, and water, wherein additional contains zamedlitel shvatyvanija "CS-VIC", which is a mixture of sulfur-containing organic substances and mineral supplements, and silicone antifoam, which is "Cecil 201" or "Politeam", or "Basopur DF5", and as a binder contains cement mixture of TRWA "Micro" with specific surface not less than 900,0 m2 /kg, as of hydroxyethyl cellulose - reagent "PF-VIC", in the following ratio of components, parts per 100 parts by weight of microcemento CA, BTREE "Micro":
Filtrate agent "PF-VIC"
0,25-0,75
Zamedlitel shvatyvanija "CS-VIC"
0,50-3,00
Microsilica MK-85
0,00-10,0
Defoamer
0,10-0,30
Fresh water
70,0-80,0