Modified sheet rock mix
The invention relates to the oil and gas industry and can be used for cementing oil, gas and gas condensate wells. The technical result is to increase frost resistance and reducing the degree of degradation of the cement stone. Modified sheet rock grouting mixture including Portland cement, gypsum and gidrokarbonat calcium, it also contains jingikan in the following ratio, wt.%: Portland 50-96, gypsum 2-25, gidrokarbonat calcium 1,98-24,95, jingikan 0,02-0,05. table 1. The invention relates to the oil and gas industry and can be used for cementing oil, gas and gas condensate wells.Known sheet rock solutions foreign firms (Halliburton, Byron Jackson, Schlumberger and others), including Portland cement and gypsum at a ratio of from 50/50 to 60/40 [1]. Cement stone, formed from these mixtures is characterized by low resistance and frost resistance of cement, as well as its high degree of destruction. These factors have a negative impact on the quality of cementing and durability of the support hole.The closest eucheuma Portland, gypsum and gidrokarbonat calcium - associated product complex nepheline ores on alumina [2] . The specified mix, although it does have a number of improved properties (zero voodoodoll, increased resistance and extension), but it is characterized by low resistance and a high degree of degradation of the cement stone. Taken together, these shortcomings reduce the reliability and durability well as structures in complex geocryological conditions of the Far North.In the claimed invention solved the problem of improving the quality of attachment and reliability of the wells in the conditions of permafrost due to increase frost resistance and reduce the degree of destruction of the cement stone.The technical result of the invention is to develop a cement slurry forming cement stone with high frost resistance and low degree of decomposition.The solution of this problem is achieved in that the modified sheet rock grouting mixture including Portland cement, gypsum and gidrokarbonat calcium, it also contains jingikan in the following ratio, wt.%: Portland - 50-96 Gypsum - 2-25 Gidrokarbonat calcium - 1,98-24,95 Jingikan - 0,02-0,isovalues in the form of dark green rhombic crystals with a characteristic metallic sheen. Physico-mechanical properties: molecular weight 218,21, with a density of 1400 kg/m3the melting point of 171oC.Preparation of sheet rock mixture in the factory is carried out on existing technology and is reduced to the dosage of the individual components with Poppet feeders or weight feeders and subsequent grinding in ball mills. Field preparation sheet rock mixture can be carried out using cementoossifying machines SMS-20, and hangeron is introduced into the liquid mixture, prepared with the help of cementing units CA-320.Were prepared with the composition of the known sheet rock mixture comprising Portland cement, gypsum and gidrokarbonat calcium, and five trains a sheet rock grouting mixture according to the invention (Portland cement, gypsum, gidrokarbonat calcium and jingikan) when Vademecum respect 0,38 with boundary and an average grade components, as well as their contents below and above the boundary limits at a temperature of 0
2oC.Determination of frost resistance was carried out in accordance with the methodology proposed in [3] the coefficient frost resistance, harakterizuyu the completed samples held during this period at a temperature of 5oC. the Degree of degradation of cement was estimated by the ratio of the strength of the samples in compression to tensile bending in a two-day age.The test results presented in the table. The data obtained indicate that the proposed sheet rock compound with an optimal ratio of components has better properties than known, namely: - coefficient frost resistance increased on average by 25%; - the degree of degradation of the formed stone fell on average by 36%.When the content of the components above the upper limit worsen the rheological properties of the solution, and when the content of component below the lower limit of the degree of degradation of the cement stone.The increase frost resistance and reducing the degree of degradation of cement in the aggregate, contribute to the quality of attachment and reliability of wells under conditions of permafrost.Sources of information 1. Century. And. Vyakhirev, A. C. Rudnitsky, A. A. Ryabokon and other Backfill materials and chemicals foreign firms//KBO. Inform. Ser. Drilling of gas and gas condensate wells. - M: IDC, JSC "Gazprom", 1997, - 44 C.2. Patent 2127798 RF, MP the ski guidelines for the testing of backfill materials for the conditions of permafrost". - M.: the gas industry, 1982, - 32 C.
Claims
Modified sheet rock grouting mixture including Portland cement, gypsum and gidrokarbonat calcium, characterized in that it further comprises jingikan in the following ratio, wt. %:Portland cement - 50 - 96
Gypsum - 2 - 25
Gidrokarbonat calcium - 1,98 - 24,95
Jingikan - 0,02 - 0,05 and
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
