CN1137246C - Condensed oil emulsifying and viscosity reducing method - Google Patents
Condensed oil emulsifying and viscosity reducing method Download PDFInfo
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- CN1137246C CN1137246C CNB001027220A CN00102722A CN1137246C CN 1137246 C CN1137246 C CN 1137246C CN B001027220 A CNB001027220 A CN B001027220A CN 00102722 A CN00102722 A CN 00102722A CN 1137246 C CN1137246 C CN 1137246C
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Abstract
The present invention provides a method for the emulsification and the viscosity reduction of thick oil, which comprises the step that emulsifying agents containing petroleum sulphonate condensation products, and water are in contact with thick oil to emulsify the thick oil to form o/w type emulsion, wherein the concentration of the emulsifying agents measured by the weight of the thick oil is from 0.01 to 1%, and the water concentration is from 10 to 100%. The emulsifying agents adopted in the method of the present invention are petroleum sulphonate condensation products prepared by the synthesis of byproducts of catalytic cracking or steam cracking, so that the cost is low. Simultaneously, the petroleum sulphonate condensation products have a favorable lipophilic property and the capabilities of high temperature resistance and hard water resistance, the effects of the emulsification and the viscosity reduction of thick oil and super thick oil are enhanced, and extracting requirements of thick oil in deep wells can be satisfied.
Description
The present invention relates to the reducing viscosity by emulsifying method of viscous crude oil.
Along with constantly carrying out of Oil extraction, the viscosity of crude in the oil well increases gradually, and conventional reoovery method can not meet the demands, need reduce viscosity of thickened oil by means of emulsifying agent, reaches the purpose that improves recovery ratio.Method of thick-oil viscosity depression by emulsification commonly used at present is that alkali lye, emulsifying agent and mineralized water are mixed, add from sleeve pipe then, mix with the viscous crude from the stratum filtration to the pit shaft, emulsifying agent reduces oil water interfacial tension greatly, formation is disperse phase with the viscous crude, water is the O/W type emulsion system of external phase, has stoped the gathering of oil droplet.Because the viscosity of external phase water is very low, the viscous crude internal friction becomes the friction between water and tube wall, greatly reduces the resistance to flow in the pit shaft, and fluid viscosity significantly reduces, and wellhead back pressure also significantly reduces, and power consumption reduces, thereby has increased substantially recovery ratio.
Wherein, the more emulsifying agent of bibliographical information and practical application is a nonionic surface active agent, for example:
CN1064498A has reported with the example of polyoxyethylene polyoxypropylene alkylbenzene phenolic ether as emulsifying agent, original reduction by tens of viscosity ratio even hundred times behind the viscous crude formation O/W type milk sap.The document claims that this emulsifying agent can make production efficiency improve 10%, and the oil pumper load reduces by 25%, and pump detection period prolongs 2-4 doubly, and the oil well output amplitude of successively decreasing reduces 50-80%.
CN88105018A has reported with the method for polyxyethylated alkylphenol as thick oil emulsifier.In addition, other patent has also been reported with the method for nonionogenic tensides such as polyxyethylated alcohol, polyoxyethylene sorbitan esters, polyoxyethylene oxypropylene polyethylene polyamine, polyoxyethylene oxypropylene propylene glycol as thick oil emulsifier.The cost of these nonionic surface active agent is higher, and temperature is when higher, obvious variation of reducing viscosity by emulsifying effect even inefficacy.
The production cost of anion surfactant is low, but resistance to hard water is relatively poor.In order to reduce the cost of emulsifying agent, people attempt to use the recombiner of anion surfactant and nonionogenic tenside or the emulsifying agent that use has two kinds of groups, as sulfuric acid (ester) salt of aliphatic alcohol polyethenoxy and oxypropylene etc.But this baroque emulsifying agent has further improved cost.
US4147638 has reported with the sulfonated petro-leum of the not condensation oil production method as emulsifying agent, but be not suitable for heavy crude producing and super viscous crude, because the field conditions of viscous crude is more special, phreatic salinity is very high, when the coordinating with steam rapid heat cycle displacement of reservoir oil, temperature can reach more than 350 ℃.Under such condition, the lower molecular weight sulfonated petro-leum of condensation is not invalid.
The object of the present invention is to provide a kind of novel method of thick-oil emulsified adhesive-reducing, this method cost is low, and reducing viscosity by emulsifying is effective, but high temperature resistance and hard water.
Method of thick-oil viscosity depression by emulsification provided by the invention comprises: the emulsifying agent that will contain the sulfonated petro-leum condenses contacts emulsification with water with viscous crude, forms o/w type emulsion.Wherein, be benchmark with viscous crude weight, emulsifier concentration is 0.01～1%, and is preferred 0.05～0.5%, the water yield is 10～100%, preferred 20～80%.
The molecular weight of said sulfonated petro-leum condenses can be 500～3000, and is preferred 1000～3000, more preferably 1000～2500, and can be the commercial goods, also can prepare according to the CN1168360 disclosed method.
Can also contain nonionogenic tenside in the said emulsifying agent, to increase resistance to hard water, as alkyl polyoxyethylene ether, alkylphenol polyoxyethylene, organic carboxyl acid Soxylat A 25-7, organic amide Soxylat A 25-7 etc.The content of nonionogenic tenside in emulsifying agent can be 0～90%, preferred 10～70%.
Can also contain alkali in the emulsifier aqueous solution, as ammoniacal liquor, sodium hydroxide, potassium hydroxide, yellow soda ash, sodium bicarbonate etc., the existence of alkali can in and viscous crude in part acid, thereby improve the reducing viscosity by emulsifying effect.The concentration of alkali in emulsifier aqueous solution can be 0～0.5%, preferred 0.05～0.2%.
Said emulsification water can be common water quality, as tap water, well water, distilled water, also can be that salinity is not higher than 60000mg/L, and calcium ions and magnesium ions concentration is not more than the mineralized water of the high salinity of 1000mg/L.
According to method provided by the invention, the emulsifying temperature of emulsifying agent, water and viscous crude is 0～90 ℃.
Said emulsifying agent can be different and different according to concrete application scenario with the water and the way of contact of viscous crude.For example,, can with less water emulsifying agent be mixed with solution earlier, again emulsifier aqueous solution be injected pit shaft with water filling if be used for viscosity reducing; If be used for steam flooding, then can with less water emulsifying agent be mixed with solution earlier, inject oil reservoir (will answer volume of water input to be converted into quantity of steam) with injecting steam then; If be used for pipeline oil transportation, whole water and emulsifying agent can be mixed with the aqueous solution, mix with viscous crude again.
The emulsifying agent that method of thick-oil viscosity depression by emulsification provided by the invention adopts is with catalytic pyrolysis or steam cracking
The emulsifying agent that method of thick-oil viscosity depression by emulsification provided by the invention adopts is that the by product with catalytic pyrolysis or steam cracking is a raw material synthetic sulfonated petro-leum condenses, with low cost, the sulfonated petro-leum condenses has good lipophilicity simultaneously, but also has the ability of high temperature resistance and anti-hard water, improved reducing viscosity by emulsifying effect, can satisfy the exploitation requirement of deep-well viscous crude viscous crude and super viscous crude.
The invention will be further described below by example.
Example 1
The triumph Dan Jia temple high viscous crude 100g that to take by weighing 60 ℃ of viscosity be 22000mP.s, 0.2g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, compound agent factory of Huiyuan product), 0.1g the polyoxyethylene nonylphenol ether (NP-30 of HLB=17.4, chemical plant, Lvshun product), 0.043g sodium hydroxide, 43g high salinity hard water (total mineralization 50000mg/l, wherein calcium ions and magnesium ions concentration is 750mg/l), 60 ℃ are stirred after 5 minutes down, with the viscosity of NDJ-1 type rotational viscosimeter (100 rev/mins) test emulsification viscous crude, test result sees Table 1.
Example 2
The Liaohe River promotion high viscous crude 100g that to take by weighing 60 ℃ of viscosity be 7521mP.s, 0.05g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, compound agent factory of Huiyuan product), 0.05gHLB=13.3 polyoxyethylene nonylphenol ether (NP-10, chemical plant, Lvshun product), 0.043g sodium hydroxide, 43g high salinity hard water, stir after 5 minutes, with the test of NDJ-1 type rotational viscosimeter, the emulsification viscosity of thickened oil sees Table 1.
Example 3
The triumph Dan Jia temple high viscous crude 100g that to take by weighing 60 ℃ of viscosity be 22000mP.s, 0.2g molecular-weight average is 2500 sulfonated petro-leum condenses (PF200A, compound agent factory of Huiyuan product), 0.1g the peregal (A-20 of HLB=15, auxiliary reagent factory, Tianjin product), 0.043g sodium hydroxide, 43g high salinity hard water (total mineralization 50000mg/l, wherein calcium ions and magnesium ions concentration is 750mg/l), 60 ℃ are stirred after 5 minutes down, with the viscosity of NDJ-1 type rotational viscosimeter (100 rev/mins) test emulsification viscous crude, test result sees Table 1.
Example 4
The triumph Dan Jia temple high viscous crude 100g that to take by weighing 60 ℃ of viscosity be 22000mP.s, 0.2g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, compound agent factory of Huiyuan product), 0.1g the amine hydroxybenzene Soxylat A 25-7 (SFC905 of HLB=15.0, chemical plant, Shandong product), 0.043g the buffered soln of yellow soda ash and sodium hydroxide, 43g high salinity hard water (total mineralization 50000mg/l, wherein calcium ions and magnesium ions concentration is 750mg/l), 60 ℃ are stirred after 5 minutes down, with the viscosity of NDJ-1 type rotational viscosimeter (100 rev/mins) test emulsification viscous crude, test result sees Table 1.
Example 5
This example adopts different emulsifying temperatures.
Emulsifying temperature is 90 ℃, and all the other conditions and emulsifying step are with example 1, and the viscosity of emulsification viscous crude sees Table 1.
Example 6
This example viscous crude source is different.
The Xinjiang viscous crude oil 100g that to take by weighing 60 ℃ of viscosity be 140mP.s, 0.09g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, compound agent factory of Huiyuan product), 0.01g polyoxyethylene nonylphenol ether (NP-30, chemical plant, Lvshun product), 0.043g sodium hydroxide, 43g high salinity hard water, stir after 5 minutes, with the test of NDJ-1 type rotational viscosimeter, the emulsification viscosity of thickened oil sees Table 1.
Example 7
This example adopts low salinity water.
60 ℃ of Dan Jia temple high viscous crude 100g that viscosity is 22000mP.s, 0.02g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, synthetic compound agent factory of Huiyuan product), 0.01g polyoxyethylene nonylphenol ether (NP-30, chemical plant, Lvshun product), 43g low salinity water (total mineralization 5000mg/l, calcium ions and magnesium ions 250mg/l wherein), stir after 5 minutes, with the test of NDJ-1 type rotational viscosimeter, the viscosity of emulsification viscous crude sees Table 1.
Example 8
This example adopts the mineralized water of different amounts.
60 ℃ of Dan Jia temple high viscous crude 100g that viscosity is 22000mP.s, 0.02g molecular-weight average is 1500 sulfonated petro-leum condenses (PF200A, synthetic compound agent factory of Huiyuan product), 0.01g polyoxyethylene nonylphenol ether (NP-30, chemical plant, Lvshun product), 66g high salinity hard water stirs after 5 minutes, with the test of NDJ-1 type rotational viscosimeter, the viscosity of emulsification viscous crude sees Table 1.
Example 9
Only contain the sulfonated petro-leum condenses in this example emulsifying agent.
60 ℃ of Dan Jia temple high viscous crude 100g that viscosity is 22000mP.s, 0.02g molecular-weight average are 1500 sulfonated petro-leum condenses (PF200A, synthetic compound agent factory of Huiyuan product), the 43g tap water, stir after 5 minutes, with the test of NDJ-1 type rotational viscosimeter, the viscosity of emulsification viscous crude sees Table 1.
Example 10
This example is the high temperature resistance test.
In order to simulate the high temperature working conditions of deep-well bottom, with example 1 described compound emulsifying agent, behind insulation 3h under 350 ℃, according to example 1 preparation emulsification viscous crude, with the test of NDJ-1 type rotational viscosimeter, the emulsification viscosity of thickened oil sees Table 1.
Comparative Examples 1
Replace example 1 described compound emulsifying agent with commercially available nonionogenic tenside NP-30 (polyoxyethylene nonylphenol ether, the same CN88105018 of structure), emulsification dosage, emulsification condition and emulsifying step are with example 1, and test result sees Table 1.
Comparative Examples 2
Emulsifying agent is NP-30, carries out emulsification according to the method for example 5, and test result sees Table 1.
Comparative Examples 3
Replace example 1 described compound emulsifying agent with commercially available phosphoric acid ester (salt) type tensio-active agent CY-2 (the same US4355651 of structure), all the other conditions are with example 1, and test result sees Table 1.
Comparative Examples 4
Emulsifying agent is CY-2, carries out emulsification according to the method for example 10, and test result sees Table 1.
Comparative Examples 5
Preparing molecular weight according to the method for US4147638 is 350 sulfonated petro-leum, be re-dubbed compound emulsifying agent in example 1 described ratio and nonionic components, and by described step emulsification viscous crude, test result sees Table 1.
Table 1
| Example | Emulsifying temperature, ℃ | The emulsification viscosity of thickened oil, mP.s |
| Example 1 | 60 | 49 |
| Example 2 | 60 | 230 |
| Example 3 | 60 | 8 |
| Example 4 | 60 | 24 |
| Example 5 | 90 | 62 |
| Example 6 | 60 | 15 |
| Example 7 | 60 | 40 |
| Example 8 | 60 | 17 |
| Example 9 | 60 | 33 |
| Example 10 | 60 | 340 |
| Comparative Examples 1 | 60 | 150 |
| Comparative Examples 2 | 90 | Not emulsification |
| Comparative Examples 3 | 60 | Not emulsification |
| Comparative Examples 4 | 60 | Not emulsification |
| Comparative Examples 5 | 60 | Not emulsification |
Claims (8)
1. the method for a thick-oil emulsified adhesive-reducing, comprising: emulsifying agent, the water that will contain the sulfonated petro-leum condenses contact emulsification with viscous crude, form o/w type emulsion, wherein, are benchmark with viscous crude weight, and emulsifier concentration is 0.01～1%, and the water yield is 20～80%.
2. according to the said method of claim 1, it is characterized in that emulsifier concentration is 0.05～0.5%.
3. according to the said method of claim 1, it is characterized in that the molecular weight of said sulfonated petro-leum condenses is 1000～2500.
4. according to the said method of claim 1, it is characterized in that, also contain 0～90% nonionogenic tenside that is selected from alkyl polyoxyethylene ether, alkylphenol polyoxyethylene, organic carboxyl acid Soxylat A 25-7, organic amide Soxylat A 25-7 in the said emulsifying agent.
5. according to the said method of claim 4, it is characterized in that the content of nonionogenic tenside in emulsifying agent is 10～70%.
6. according to the said method of claim 1, it is characterized in that, also contain 0～0.5% alkali in the emulsifier aqueous solution.
7. according to the said method of claim 1, it is characterized in that emulsifying temperature is 0～90 ℃.
8. according to the said method of claim 1, it is characterized in that emulsification is not higher than 60000mg/L with water salinity, calcium ions and magnesium ions concentration is not more than 1000mg/L.
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| CNB001027220A CN1137246C (en) | 2000-02-22 | 2000-02-22 | Condensed oil emulsifying and viscosity reducing method |
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| CNB001027220A CN1137246C (en) | 2000-02-22 | 2000-02-22 | Condensed oil emulsifying and viscosity reducing method |
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| CN1137246C true CN1137246C (en) | 2004-02-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1297625C (en) * | 2004-05-08 | 2007-01-31 | 刘玉勤 | Chemical adjuvant for heavy crude oil extraction and its uses |
| CN101735115B (en) * | 2008-11-18 | 2013-06-05 | 长江大学 | Salt resistance and calcium resistant deep extra-heavy oil emulsifier and viscosity dropping agent |
| CN101824979B (en) * | 2010-05-12 | 2012-10-31 | 闫若曦 | Emulsion process profile control and water shutoff method of thickened oil steam huff-puff wells |
| CN104265252B (en) * | 2014-08-19 | 2017-07-07 | 中国石油天然气股份有限公司 | A kind of heavy crude reservoir artificial oil stream displacement recovery method |
| CN105567206B (en) * | 2014-10-17 | 2018-03-20 | 中国石油化工股份有限公司 | A kind of emulsified viscous oil visbreaking agent |
| CN108531156B (en) * | 2018-04-03 | 2020-11-17 | 东营市百扬石油科技有限责任公司 | Thickened oil dispersion oil production auxiliary agent suitable for offshore oil field |
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