The method of obtaining salt from produced water of an oil field |
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IPC classes for russian patent The method of obtaining salt from produced water of an oil field (RU 2211802):
 The method of injection of fluid into the reservoir / 2211314
The invention relates to the oil industry, in particular to the development of oil fields, and can be used for reservoir pressure maintenance by water injection and for injection into the reagent reservoir to increase oil recovery
The way to develop high-viscosity oil pools / 2210664
The invention relates to the oil industry and can find application in the development of high-viscosity oil pools
The way of the development of oil deposits / 2209954
The invention relates to the field of development of oil fields and may find application in the development of irrigated oil deposits
The way of the development of oil deposits / 2209953
The invention relates to the oil industry and can find application in the development of reservoirs with bottom water
 The way of the development of oil deposits / 2209952
The invention relates to the oil industry and can find application in the development of reservoirs with bottom water and fractured porous cavernous collector
The way of the development of oil deposits / 2209951
The invention relates to the oil industry and can find application in the development of oil deposits
 The way to develop high-viscosity oil pools / 2209950
The invention relates to the oil industry and can find application in the development of high-viscosity oil pools
 The way of development of deposits of oil from low-permeability reservoirs / 2208140
The invention relates to oil field development, namely the development of oil from low-permeability reservoirs
 The way to develop flooded oil reservoirs with a zone - inhomogeneous and rannapromenaadi layers / 2208139
The invention relates to the field of oil field development and can be used in the development of irrigated zone-inhomogeneous oil fields with clay collectors
 The way of the development of oil deposits / 2206725
The invention relates to the oil industry and can be used in the development of complex oil fields
 The method of obtaining potassium fertilizers / 2196759
The invention relates to the field of production of potash fertilizers from sylvinite ores by flotation method
The method of obtaining salt / 2167286
 The method of obtaining potassium chloride / 2154025
The invention relates to techniques for processing fine potassium chloride, resulting in the production of potash fertilizers from sylvinite ores
 The method of obtaining potassium chloride / 2147011
The invention relates to the processing of potash ores, in particular the production of mineral fertilizers
The method of obtaining potassium chloride / 2143999
The invention relates to techniques for the production of potassium chloride from sylvinite ores by the method of dissolution-crystallization
 The method of obtaining potassium chloride from sylvinite ores / 2136594
The invention relates to the enrichment of sylvinite ores upon receipt of potassium chloride
 The way quasi determine the degree of saturation silvina hot solutions and device for its implementation / 2114804
The invention relates to a method continuous determining the degree of saturation Silvina hot solutions and device for its implementation
 The method of obtaining potassium chloride / 2114784
The invention relates to the production of potassium chloride from substandard fine by-product of potash factories and involves the dissolution of fine substandard potassium chloride - cyclone dust gallerycheck or flotation plants, crystalline product obtained by classification of the main product or concentrate, etc
 Installation for physical and mechanical tests of materials / 2083826
The invention relates to test equipment, in particular for testing of rock samples
Potassium chloride and sodium chloride production process / 2307790
Invention is intended for use in chemical and mining industries to manufacture mineral fertilizers and food salts. Ground sylvinite ore is dissolved in recycled potassium chloride-saturated lye. Resulting solution is directed at a rate of 0.03-0.15 m/s to leaching in the first dissolution column, with its electrodes connected to one of a current source poles, and treated by low-frequency (1-5 Hz) alternating electric field at voltage 30-100 v. Solution thus enriched with potassium chloride is fed together with solid phase into the downstream second dissolution column with its electrodes connected to opposite pole of the current source. Treatment by alternating electric field in the second column is effected under the same conditions as in the first column. Two-step leaching results in potassium chloride solution and sodium chloride-enriched solid phase. Separated sodium chloride is sent to production of food salt. Potassium chloride is separated from solution via crystallization.
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The invention is intended for petroleum, chemical, food and mining industries and can be used to obtain different salt range and fluid damping. Produced water oil deposits cleaned from mechanical impurities, residues of oil and iron salts. Treated produced water is served on termocompressive evaporation plant, which is led by its evaporation before reaching the density of the residual liquid from 1310 until 1398 kg/m3. The obtained salt with different particle size and different contents of calcium and magnesium, depending on the density of the residual liquid, used as a dining room, feed salt or for salting fish or meat. The residual liquid is identical with reservoir water set mineral salts and can be used as a kill fluid. The invention allows to expand the range of the resulting salt. The method is simple, economical and non-waste. table 2.
The invention relates to a process for the production of chlorides of alkali and alkaline earth metals.
A method of obtaining sodium chloride from the brine oil wells. [Overview. Sa unsuitability of sodium chloride for food purposes because of the presence of contamination.
Closest to the proposed invention solves the above disadvantages, is the method of obtaining salt from produced water of an oil field. The method includes the treatment of the source of produced water from mechanical impurities, residues of oil, iron salts and evaporation of produced water with the concentration of salts. When reaching a certain concentration of calcium chloride in the brine is the deposition of salt, suitable for food purposes. Table salt is separated from the rest of the brine on the centrifuge, washed from the salts of calcium source produced water is again sent to a centrifuge to separate from the liquid and dried [W. F. Takhautdinov, R. S. Khisamov, R. H. Muslimov and other prospects of development of hydromineral resources of oil deposits of the Ural-Volga region. // The oil economy, 1998, 7, - S. 79].
The disadvantage of this method is the limited range of products, due to the fixed value of the density of the residual liquid, equal to 1300 kg/m3.
The task of the invention is the expansion of the range of salt and receive residual liquids of different density odinakovye fact, in the method of obtaining salt from produced water oil fields, including the treatment of the source of produced water from mechanical impurities, residues of oil, iron salts and evaporation of produced water with precipitation of salt, according to the invention, the evaporation is carried out to achieve the density of the residual liquid from 1310 kg/m3to 1398 kg/m3.
The essence of this invention is to provide a residual liquid from produced water of an oil field with different densities but the same with reservoir water set mineral salts, suitable for plugging wells in a wide range of changes in reservoir pressure and salt for various purposes. Killing the well is a technological replacement operation of the downhole fluid at a special liquid with high density. This operation is necessary for subsequent underground repair of wells, reservoir pressure which may vary from 7.5 to 26 MPa (Romashkinskoye oil field). The increase in the density evaporation occurs at a constant separation of salt from the residual liquid. In the beginning of the process receive a large salt almost without the but-effect relationship with the density of the residual liquid. With the increase in the density of the residual liquid to decrease the size of the crystals of sodium chloride and increases the content of chlorides of calcium and magnesium precipitated salt. Changing the density of the residual liquid at a constant part of the original formation water, it is possible to produce commercial products for various purposes. This is the difference of the proposed method from the known. At the beginning of the interval densities of the residual liquid density taken 1310 kg/m3. The upper limit of the density of the residual liquid is selected density 1398 kg/m3. When the density is higher 1398 kg/m3the residual liquid becomes thick and sedimentation unstable. Changing the properties of precipitated salt causes different applications. For example, when salting fish requires coarse salt with a low content of magnesium and calcium, and for pickling meat needed salt medium grain and limited content of magnesium compounds [Overview. Food industry, series 18. Salt industry, vol.1, M:, 1981, S. 6, 2nd paragraph]. Table salt is obtained by evaporation of produced water to a density of 1330 kg/m3and above, without additional purification it concealthe as the dining room, because it contains is necessary for the body trace amounts of substances. With further increase in the density of the evaporating liquid (1350 kg/m3and above) in the precipitated salt goes from 3 to 9% of the chlorides of calcium and magnesium, making it unfit for human consumption, but it is applicable in animal feed. The dependence of the properties of salt fluid density damping determined in laboratory conditions. The results are shown in table. 1.
An example of a specific implementation. At the first stage of processing produced water to produce cleaned from mechanical impurities, residues of oil and iron salts. Next, the produced water is supplied to termocompressive evaporation unit in which different modes evaporation of produced water with increasing concentration of salts. Based on the demand for fluid for plugging wells with a certain density, choose the appropriate mode of evaporation (see table 1). The density of the residual liquid for killing wells determine the rate of creation by the liquid column hydrostatic pressure in the well in excess of formation (pore) pressure on the value of 10-15%. For example, for a well with a depth of 1700 m and reservoir pressure of 24.5 MPa, density of calcium chloride from brine water is the precipitation of sodium chloride, suitable for food purposes. Table salt is obtained when 6 mode residue, can be used for pickling meat. Table salt is separated from the residual liquid by centrifuge, washed with salts of calcium source produced water, again return to a centrifuge to separate from the liquid and dried. Ready salt goes on the packaging. Based on the quality of the salt samples meet the standards GOST 13830-91 (see tab.2).
The residual liquid after evaporation is used as the liquid plugging of oil wells. The efficiency of the method is caused by without waste, as both products (salt and residual liquid) are the target.
Claims The method of obtaining salt from produced water oil fields, including the treatment of the source of produced water from mechanical impurities, residues of oil, iron salts and evaporation of produced water with precipitation of the salt, wherein the evaporation is carried out to achieve the density of the residual liquid from 1310 until 1398 kg/m3.
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