The method of processing oil in the oil well

 

(57) Abstract:

Usage: in the mining industry, namely in the methods of processing oil in the oil well. The method involves separation from the oil produced water is injected into the oil demulsifying agent containing disolve. Then the oil is heated and defend in the separation tank. Dehydrated oil is fed into the pipeline for transport to the main pumping station. The introduction of demulsifier carried out periodically at the wellhead in the amount of 6 to 10 grams per ton of extracted oil. Heating is carried out until a temperature of at least +60oC, followed by settling of the oil separation tank for 1.5 - 2 hours the Demulsifier as dissolvine contains disolved 3431 and further comprises proxanol is chosen PM when the mixing ratio from 1 : 3 to 3 : 1. Supply dehydrated oil pipeline for transportation of alternate feed into the pipeline separated water through the layer selection from the separation tank. The invention provides a more effective treatment of produced oil and its further transportation by increasing the depth of dehydration and reduce dehydration. 2 C.p. f-crystals, 1 Il., table 1.

A method of processing oil in the oil well, including separation from the oil produced water is injected into the oil demulsifying agent containing disolve, followed by heating and defending her from the separation tank and a supply of dehydrated oil in the pipeline for transportation to the main pumping station (GSP) (see USSR author's certificate N 948393, B 01 D 17/05, published. 1982).

The disadvantage of this method is the low depth of oil dehydration, and that because of this, when the further transportation of oil from residual water in the pipelines as a result of mixing water with oil is formed finely dispersed sustainable hardly separated emulsion, for subsequent separation which you want to spend extra money and time and more significant. In addition, you must implement the additional heating of the oil at higher temperatures, because during transportation, especially in the winter time, it is cooled to +25oC at the outlet from the well up to +4oC at the end of the transport pipeline. The disadvantage is the inefficiency of pumping oil from the fact that oil is less dense than water.< the its further transportation by increasing the depth of dehydration, reducing the cost of dehydration, the exclusion of further oil dehydration and improve transportation conditions due to pumping by the pump more dense medium and push it through the less dense oil.

The specified task is achieved in that in the method of processing oil in the oil well, including separation from the oil produced water is injected into the oil demulsifying agent containing disolve, followed by heating and defending her in the separation tank and a supply of dehydrated oil in the pipeline for transportation to the main pumping station (SHG), in contrast to the method according to the prototype of the introduction of demulsifier carried out periodically at the wellhead in the number of 6-10 g per ton of extracted oil, and heating is carried out to a temperature of at least +60oC, followed by settling of the oil separation tank for 1.5-2 h, and the demulsifier as dissolvine contains disolved 3431 and further comprises proxanol is chosen PM when the mixing ratio from 1:3 to 3:1, and the supply of dehydrated oil pipeline for transportation of alternate feed into the pipeline separated water through the layer selection from the separation tank.

the processing of fusel oils in the ratio of 1:1 to the total number of proxanol is chosen by the PM and dissolvine 3431.

And the fact that the defense of oil after the introduction into it of demulsifier conduct in two separate containers, the filling and emptying of which lead in turn.

Proxanol is chosen PM is a water-soluble block copolymer of ethylene oxides and propylene with a molecular mass of 3000-6000, produced by the Ukrainian company "Barma".

Disolve 3431 is an oil-soluble mixture of liquid nonionic surfactant, produced by German company "Hoechst".

Propylethylene faction processing fusel oil is a product of distillation of fusel oils.

The drawing shows a process flow diagram of installation for implementing the method.

The installation consists of the separation tank 1, has an input line 23 is connected to the pipe 3 for supplying the produced oil from the well, and outlet pipes 4 and 5 for supplying dehydrated oil and separated water respectively in the pipe 6 to the pumping pump 7 for transportation to the main pumping station (SHGs). The pipes 2, 4, 5 and 6 installed valves 8, 9, 10 and 11. In the pipe 3 has an input 12 for feeding the extracted oil demulsifier.

To reduce the time on podgototovki 15 and the output pipes 16 and 17 by bolts 18 and 19 to supply dehydrated oil and separated water in the pipe 6.

The separation tank 1 and 13 are the outputs 20 and 21 to release the separated gases. On line 3 after you enter 12 for the demulsifier is selected, the heater 22.

Patented method is as follows.

In coming out of the wells produced oil supplied through the pipe 34, at the wellhead, where the oil temperature is 23 - 25oC, periodically through enter 12 enter the demulsifier containing proxanol is chosen by the PM and disolve 3431 in the ratio, for example 1:1. The frequency of introduction of demulsifier is determined by the filling time of the extracted oil separation tank 1 (it is introduced only during the filling and not injected during the sedimentation of oil). The demulsifier enter in the quantity, for example, 8 g per ton of extracted oil. After that, the oil is heated to a temperature equal to not less than 60oC, the heater 22 and fill her separation tank 1, where the heated oil demulsifier rest for 2 hours resulting In the stratification of the extracted oil to the dehydrated oil and water with the release of gases which are discharged through the outlet 20. At the time of sludge produced layer-by-layer selection of oil and water. First select obersvation to HCC, in this case, valve 10 in the pipe 5 is closed. After pumping all dehydrated oil from the separation tank 1 select water. To do this, close the valve 9 and opening the valve 10 in the pipe 5 and the pump 7, water is supplied into the pipeline for transport to HCC followed by a portion of the dehydrated oil. Such portions pumping contributes to more efficient transportation of oil by pipeline, because it pumped more dense medium is water.

The use of a demulsifying agent containing proxanol is chosen by the PM and disolve 3431 in the specified proportions, leads to a deeper odottelen. For more efficient separation of water from oil demulsifier enter propylethylene faction processing of fusel oils, introduced in the ratio of 1:1 to the total number of proxanol is chosen by the PM and dissolvine 3431.

The results of the comparative tests are given in table. When the tests were processed viscous oil density 860-870 g/cm3the tar - 16%, paraffin - up to 4%. Processing was carried out at a temperature of 60oC.

The introduction of a demulsifying agent containing proxanol is chosen by the PM and disolve 3431 in the specified proportions, allows to increase the depth of oil dehydration, to 1.9%, and uvedenemu number of proxanol is chosen by the PM and dissolvine 3431, increases the depth of dehydration to 1.5%.

Heating costs up to 60oC extracted oil at the wellhead with an initial temperature of 25oC is much less than heat up to this temperature the oil to HCC, where she after transporting it by pipeline cools to a temperature of 4oC.

For deletion, the installation may have a second separation tank 13, which is populated with the extracted oil after filling it the first separation tank 1. While in the first container 1 is in the process of separating oil, water and gas, the second tank 13 is filled, and when the second container 13 separates oil, water and gas from the first tank 1 is produced layer-by-layer selection dehydrated oil and water. This preparation process oil, its pumping by the pump 7 into the pipeline for transport occurs almost without breaks and stops. A more complete separation of water from oil prevents the formation of stable emulsions in gathering systems and transportation of oil and as a result does not require expensive equipment and technology for its further destruction.

1. The method of processing oil in the oil well, including separation from narrowly missed the om and defending her in the separation tank and a supply of dehydrated oil in the pipeline for transportation to the main pumping station (SHGs), characterized in that the introduction of demulsifier carried out periodically at the wellhead in the amount of 6 to 10 g per 1 ton of produced oil, and the heating is carried out to a temperature of at least +60oC, followed by settling of the oil separation tank for 1.5 - 2 h, and the demulsifier as dissolvine contains disolved 3431 and further comprises proxanol is chosen PM when the mixing ratio from 1 : 3 to 3 : 1, and the supply of dehydrated oil pipeline for transportation of alternate feed into the pipeline separated water through the layer selection from the separation tank.

2. The method according to p. 1, characterized in that the demulsifier addition enter propylethylene faction processing of fusel oils in the ratio of 1 : 1 to the total number of proxanol is chosen by the PM and dissolvine 3431.

3. The method according to p. 1 or 2, characterized in that the defense of oil after the introduction into it of demulsifier conduct in two separate containers, the filling and emptying of which lead in turn.

 

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FIELD: crude oil treatment.

SUBSTANCE: to oil emulsion is added surface-active demulsifying additive containing (i) aqueous solution of surfactant based on sodium salt of oxyethylated isononylphenol carboxymethylate expressed by general formula C9H19-C6H4-O-(-CH2-CH2O)nCOONa, where n=10-12, (ii) self-emulsifying organosilicon compound, and (iii) sodium or calcium chloride salt.

EFFECT: increased demulsifying power.

1 tbl, 13 ex

FIELD: composition for crude oil treatment in oil producing and oil refinery industry.

SUBSTANCE: claimed composition is obtained by mixing of four components. Oxyethylated isononylphenone sodium carboxymethylate of formula C9H19-C6H4-O-(-CH2-CH2O)nCOONa, where n = 12 is used as an active ingredient. Silicone is introduced in composition as self-emulsifying addition, and aqueous or aqueous-salt solution is used as solvent. Composition contains (mass %) oxyethylated isononylphenone sodium carboxymethylate 25-35; self-emulsifying silicone addition 0.01-1.0; calcium chloride 0-25; and as balance: water.

EFFECT: composition with high demulsifying action and reduced foaming formation in crude oil emulsion.

2 ex, 1 tbl

FIELD: crude oil treatment.

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EFFECT: increased efficiency in destruction of oil-water emulsion and in removal of petroleum products from waste waters accompanied by good corrosion protection and anti-deposits effect.

2 cl, 3 tbl, 20 ex

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