The method of isolation of water and getprotocol in wells
The method of isolation of water and getprotocol in wells refers to the oil industry and can be used for isolation of water and getprotocol in wells neftegazonosnyh collectors, predominantly carbonate. The technical result - improving the efficiency and reliability of the method. The method of isolation of water and getprotocol in wells, including injection insulating composition through hydrodynamic oscillation generator installed in the tubing pipes in the interval of injection of the composition into the reservoir, provides prior to injection into the formation of the insulating composition through hydrodynamic oscillation generator download fringe a mixture of water with commercial oil and rims of water or aqueous sedimentation reagents and conducting technological exposure, the insulating composition use composition containing high molecular uglepodgotovitelnyj polymer is butyl rubber with a molecular mass of 16000-60000 or polyisobutylene with a molecular mass of 20000-80000, hydrocarbon solvent and high-viscosity oil in the following ratio, wt.%: the specified high molecular uglepodgotovitelnyj polymer 0,25-0,35, uglevodorodyonogo n-heptane, n-hexane, diesel fuel, kerosene, gasoline, natural gas condensate. And after injection of the insulation composition through hydrodynamic oscillation generator download fringe water, oil, nonionic and/or anionic surfactants in the following ratio, wt.%: nonionic and/or anionic surfactant 0,08-0,2, commodity oil 50,0-54,0, water the rest. Technological exposure can be carried out in a period of time not less than 40 hours as sedimentation reagents can be used solutions of soda ash and liquid glass in fresh water and potassium chloride water with density 1160-1200 kg/m3. Water commodity oil, solutions sedimentation reagents and oil with an aqueous solution of nonionic and/or anionic surfactants - surfactants can be injected into the column tubing simultaneously or separately. 5 C.p. f-crystals, 3 tab., 1 Il. The invention relates to the oil industry and can be used for isolation of water and getprotocol in wells neftegazonosnyh collectors, predominantly carbonate.There is a method of isolation of water and getprotocol in squag the ri mixture which is formed vadagadacilebuli material, and after injection solutions madagascariensis intervals of the formation affect the acoustic oscillations. As a result, in these intervals is dynamic acceleration and more efficient mixing of reagents with the formation of a solid insulating material, due to acoustic flows (ed. St. USSR 1640364, CL E 21 In 33/138, publ. in B. I. 13, 1991). The disadvantages of this method are the large amount rims of the injected reagents and excessive consumption of the base reagent is inherent to methods with sequential injection of reagents. Because the impact on the formation of acoustic vibrations produced after injection of the reagents, the dynamic mixing will only occur on the boundary of rims and increase coverage of the processed interlayer insulating effect will be insignificant. And in the case of isolation gazobetona, due to the high penetrating ability of gas, the known method becomes unreliable due to breakthrough of gas in low-permeability intervals isolated interlayer. The low efficiency of this method when applied in carbonate (hydrophobic) reservoirs is also a consequence of bright pyunyh layers, including the injection of the insulation composition of the hydrocarbon-based, characterized in that the insulation composition of the pumped oil solution of the polyolefin in the following ratio, wt. %: polyolefins - 0,8-10, oil - 90-99,2 (RF patent 2081310, CL E 21 In 43/32, publ. in B. I. 16, 1997). The disadvantage of this method is the high consumption of a basic reagent (polyolefins). Applied in the known method, the polyolefin is a low molecular weight polymers (oligomers) which, when dissolved in oil of medium viscosity form a biphasic solution of oil - dispersed phase. Therefore, the isolation mechanism such solutions are close to the movement of a mechanical blockage of the formation, but in a weakened form. Consequently, the known method is ineffective for prolonged restriction of inflow of water into the well. From the above description of the example implementation of this method on the well implies that it is inefficient to limit the flow of gas into the well, as the oil and hydrocarbon gas unlimited mixed together.Closest to the proposed invention is a method of restricting the inflow of water into the producing wells, providing for the injection IKI it into the reservoir install hydraulic vibrator in the column tubing. Before injection of the insulating composition in the reservoir interval injection is subjected to vibration impacts from hydraulic vibrator in the processing of wells in circulation (RF patent 2168608, CL E 21 In 33/13, 43/32, publ. in BIPM 16, 2001).The disadvantage of this method is low efficiency from the use of gel-forming compounds on carbonate rocks, the increased consumption of basic chemicals, the need for preliminary laboratory study for each processed borehole core samples from the reservoir to determine the ion-exchange activity breed of collector when interacting with the gel-forming composition and associated water - to establish the process of precipitation during its interaction with this song.The objective of the invention is to improve the efficiency and reliability of the method is mainly applied to carbonate reservoirs by increasing the uniformity of coverage of the formation rims filterable liquids and increasing isolation steps used in the method of insulating composition in conjunction with the proposed technological operations, along with the reduction of the consumption of the basic reagent.The problem is solved Theo composition through hydrodynamic oscillator, installed in the tubing pipes in the interval of injection of the composition into the reservoir, according to the invention, prior to injection into the formation of the insulating composition through hydrodynamic oscillator pumped a slug of a mixture of water with commodity oil, then the rim of the water or aqueous solution precipitation forming reagents, and conduct technology exposure, the insulating composition use composition containing high molecular uglepodgotovitelnyj polymer is butyl rubber with a molecular mass of 16000-60000 or polyisobutylene with a molecular mass of 20000-80000, hydrocarbon solvent and high-viscosity oil in the following ratio, wt.%: High-molecular uglepodgotovitelnyj polymer - 0,25 - 0,35 Hydrocarbon solvent - 8,0 - 10,0 high-Viscosity oil - the Rest as a hydrocarbon solvent using n-heptane, n-hexane, diesel fuel, kerosene, gasoline, natural gas condensate.After injection of the insulation composition suitable for improving the reliability of the method to upload via hydrodynamic vibrator constituting water, crude oil, nonionic surfactant - surfactant type ethoxylated alkylphenol and/or anionic the second surfactant type ethoxylated alkylphenol and/or anionic surfactants of the type NP sulfonic acid-3 - 0,08 - 0,2 Marketable oil - 50,0 - 54,0 Water - the Rest as nonionic surfactants can be used OP-6, OP 10, disolve-4411, AF9-6, AF9-12, separol-25 and otherAs anionic surfactants can be used surfactant type sulfonic acid NP-3.Technological exposure it is advisable to set for at least 40 hours.As sedimentation reagents can be used soda ash solution with liquid glass in fresh water and potassium chloride water with a density of 1160 - 1200 kg/m3.To obtain a stable inverse emulsions and maximum sediment at the output of the generator is advisable water with commodity oil, sedimentation reagents and marketable oil with an aqueous solution of nonionic and/or anionic surfactant injected into the column tubing simultaneously and separately.The technical result in the proposed method is achieved by forming in the rock around the wellbore solid, uniform gas-tight screen held in the reservoir by a continuous rim offer insulating composition. The creation of such a screen is possible by increasing the uniformity of coverage of the insulated pays for the expense of obtaining fine dispersion in the reservoir in the field of elastic waves, and thanks to the destruction of these field fluctuations polymolecular layers of physically bound water and their mass removal from the surface of rocks. Download fringes formed in the layer of the inverse emulsion and aqueous sedimentation reagents in these conditions creates favorable preconditions for the subsequent hydrophobic interaction sites emerging spatial grid proposed insulation composition with a hydrophobic surface pores and cracks carbonate rocks. Thus, the application of the proposed sequence of fringes in the field of elastic waves provides after technological excerpts getting in the hydrophobic layer is rigidly coupled with the rock two-phase system consisting of mobile and immobile phases, which makes the phase constant of water gastight screen insignificant.Increasing isolation steps in the present invention is achieved qualitatively new properties offered insulating composition, the main of which is the phase transition "viscous solution - pseudogene - gel after preparation of the solution depending on the type of high-molecular polymer and selected for it pliopithecus from 20 to 65oFor butyl rubber with a molecular weight of 16,000 - 60000 and polyisobutylenes with a molecular weight of from 20,000 to 80,000. In the drawing for a demonstration of this transition shows the dependence of macroviscosity from the time that has elapsed after its preparation, for insulating composition containing 0.3% butyl rubber with a molecular weight of 16,000, 9.7% of diesel fuel and 90% of high-viscosity oil with a kinematic viscosity of 136 mm2/s, measured at a temperature 30oC. a Solution of butyl rubber in the diesel fuel was prepared within 3 days with periodic stirring, its viscosity was 3 mm3/s, i.e. it is true. Then it was mixed with the heavy oil in the ratio that satisfies the proposed composition. When using polymers with the above-mentioned molecular mass was phase transition "viscous solution - pseudogene - gel". Similar dependencies were obtained for the entire claimed range of concentrations of the used polymer.As high-molecular uglepodgotovitelnyj polymers can be used butyl rubber with a molecular mass of 16000-60000 or polyisobutylene with a molecular mass of 20000-80000. The upper limit of the molecular weight due to the solubility of the polymer that at a given molecular weight, the polymer is still able to cause a phase transition in the insulating composition "viscous solution pseudogene - gel" For similar insulating composition, but on the basis of low-molecular-weight butyl rubber or polyisobutylene identical represented in the drawing dependence was observed only the first step, i.e., recorded only a transition viscous solution - pseudogene".Table 1 shows the values of macroviscosity







Claims
High-molecular uglepodgotovitelnyj polymer - 0,25-0,35
Hydrocarbon solvent - 8,0-10,0
High-viscosity oil - Rest
2. The method according to p. 1, characterized in that as a hydrocarbon solvent using n-heptane, n-hexane, diesel fuel, kerosene, gasoline, natural gas condensate.3. The method according to each of paragraphs.1 and 2, characterized in that after the injection of the insulating composition through hydrodynamic oscillator pumped a slug of water, crude oil, nonionic and/or anionic surfactants - surfactants in the following ratio, wt.%:
Nonionic and/or anionic surfactants - 0,08-0,2
Commodity oil - 50,0-54,0
Water - the Rest
4. The method according to each of paragraphs.1 -3, characterized in that the technological exposure is carried out in a period of time not less than 40 hours5. The method according to each of paragraphs.1-4, characterized in that as sedimentation R will bind water with density 1160-1200 kg/m3.6. The method according to each of paragraphs.1-5, characterized in that the water product oil solutions sedimentation reagents and oil with an aqueous solution of nonionic and/or anionic surfactant is injected into the column tubing simultaneously or separately.
FIELD: oil and gas production.
SUBSTANCE: invention relates to grouting mortars used for cementing casing pipes of gas, gas-condensate, and oil wells complicated by presence of formations with low hydraulic rupture pressure as well as presence of permafrost rocks. Light-weight grouting mortar contains 47.0-60.0% special-type cement, 6.6-11.8% clinoptilite as light-weight additive, and water. As a result, casing-pipe annulus incidents during boring and running wells are avoided owing to improved parameters of grouting cement, in particular increased sedimentation stability of mortar, dimensional stability and needed strength of cement stone at low positive and negative temperature in early hardening stages are achieved at simultaneous lowering of grouting mortar density.
EFFECT: improved performance characteristics of grouting mortar.
1 tbl
FIELD: oil and gas chambers construction.
SUBSTANCE: method includes pumping of portion of water-absorbing acryl polymer, exposure of it in a well, pumping of second portion of same polymer, tempered on fresh water with concentration 1-20%, buffer of fresh water dries up, and before and after pumping of second portion of water-absorbing polymer, tempered on hydrocarbon liquid with concentration 10-20%, buffer of hydrocarbon liquid is pumped in, besides, said 2-portion systems are pumped into well multiple times.
EFFECT: higher efficiency.
1 ex
FIELD: oil and gas production.
SUBSTANCE: invention provides grouting composition intended for selective insulation of water inflows into wells, including those occurring under low-temperature and high-permeation oil reservoirs, as well as for suppressing lost-circulating zones and brine inflow zones. Composition including product of hydrolytic etherification of chlorine-containing phenyltrichlorosilane still residues with aqueous alcohol solution contains, more specifically, product obtained by hydrolytic etherification of 100 wt parts of indicated residues with 10-32,8 wt parts of 90-93% aqueous alcohol solution in presence of 10-40 wt parts of orthosilicic acid ethyl ester and, additionally, 15-35 wt parts of chlorine-containing phenyltrichlorosilane still residues at summary content of the two components 133.2-161.6 wt parts. Grouting composition may further contain up to 16.8 wt parts of polar solvent.
EFFECT: lowered repair operation cost, enabled utilization in a wide formation temperature range, including that in high-permeation and low-temperature oil reservoirs, and prolonged shelf time of grouting composition.
2 cl, 1 tbl
FIELD: oil extractive industry.
SUBSTANCE: method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum nitrate, chrome nitrate, iron nitrate, magnesium nitrate, barium nitrate, calcium nitrate or their mixtures.
EFFECT: higher efficiency.
2 tbl
FIELD: oil extractive industry.
SUBSTANCE: method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum acetate, chrome acetate, iron acetate, magnesium acetate, copper acetate, barium acetate, manganese acetate, calcium acetate or their mixtures.
EFFECT: higher efficiency.
1 tbl
FIELD: oil extractive industry.
SUBSTANCE: method includes pumping, in carrying liquid - waterless mixture of oil products containing waterless oil, of powder-like water-soluble polymer and connector in amount of 0.05-0.2% for mass of carrying liquid or 30-100% for mass of power-like water-soluble polymer, as said mixture a mixture of waterless oil and light oil products processed in relation 0.1:9.9-9.9:0.1 is used, and as connector - dry aluminum sulfate, chrome sulfate, iron sulfate, magnesium sulfate, copper sulfate or their mixtures, or their alums with common formula MIMIII(SO4)
EFFECT: higher efficiency.
2 tbl
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes feeding water-isolating compound along tubing pipes, containing polyvinyl spirits and consisting of components forming an impenetrable zone in case of mixing in the bed, pressing it into bed, washing and exposure of well for forming of impenetrable zone, tubing column is lowered for 2-3 meters below perforation range, and into isolation range along tubing pipes hydro-repelling liquid is first pumped, in volume, exceeding volume of water-isolating composition in at least two times, water-isolating composition includes special liquid except from polyvinyl spirits, its pumping is performed in sequence - first goes polyvinyl spirits, then buffer liquid, special liquid, buffer liquid, repeating these operations until reaching required height of isolation interval and fixing of well-adjacent area, after that said pressing, washing of well and said polymerization exposure are performed.
EFFECT: higher efficiency.
1 dwg, 1 ex
FIELD: oil and gas production.
SUBSTANCE: plugging mix intended for cementation of oil, gas, and gas condensate wells under moderate and elevated temperatures contains 50-76% Portland cement, 20-40% finely ground quartz, and caustic magnesite powder.
EFFECT: reduced filtration and shrinkage of plugging mortar.
1 tbl
FIELD: oil and gas production.
SUBSTANCE: Portland cement-based composition contains, wt %: polymer 1-10, hardening accelerator 6-8. plasticizer 0.3-0.5, alumina cement 7-10, gypsum dihydrate and/or anhydrite 5-8, said polymer being selected from the group comprising: polyacrylamide, hydrolyzed polyacrylonitrile, polyvinyl alcohol, organosilicon liquid, latex and cationic bitumen emulsion, and said hardening accelerator being alkali or alkali-earth metal sulfates or chlorides.
EFFECT: improved properties, reduced shrinkage deformations, and under conditions resistance to fissuring.
2 cl, 2 tbl
FIELD: mining engineering, in particular improving of reservoir recovery.
SUBSTANCE: claimed composition contains (mass parts): resin 100; liquid curing agent (e.g., alkali solutions) 15.1-60; ammonium carbonate 0.1-9.9. Composition of present invention afford the ability to limit the water and sand inflow, to increase strength and permeability of formed reservoir.
EFFECT: improved reservoir recovery, increased turnaround time, reduced underground equipment in well.
2 tbl, 4 ex, 2 cl