Highly effective viscosity-reducing agent for thermodynamic oil extraction process

A technology for thermal oil recovery and viscosity reducing agent, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of practical application of difficult thermal oil recovery technology, poor solubility of layered asphaltenes, limited viscosity reduction ability, etc. Achieve the effect of solving the problem of the timeliness of the agent, improving the ultimate recovery factor, and reducing the viscosity and pour point.

Active Publication Date: 2008-08-06
盘锦河升大地石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The water-soluble viscosity reducer is mainly composed of surfactant and water, and has the following defects when used in thermal oil recovery technology: first, it mainly uses the principle of emulsification to reduce viscosity, and cannot directly dissolve asphaltenes, colloids, and wax crystals. The viscosity-reducing effect is limited; second, it is difficult to automatically diffuse into the crude oil after being injected into the oil layer from the oil well; third, there is no effect or the opposite effect when the crude oil in the oil layer has a low water content
[0004] The oil-in-water emulsion viscosity reducer is mainly composed of surfactants, water and organic solvents. It has the following defects when used in thermal oil recovery technology: First, it mainly uses the principle of emulsification to reduce viscosity, directly dissolves and breaks asphaltenes, Colloids and wax crystals have limited ability to reduce viscosity; second, it is difficult to automatically diffuse into the crude oil after being injected into the oil layer from the oil well; third, the effect is extremely poor or opposite when the water content of the oil layer is low; The oil emulsion immediately delaminates under the heating of high-temperature fluid, and the synergistic injection construction process cannot be realized
[0005] Oil-soluble viscosity reducers are mainly composed of oil-soluble pour point depressants, organic solvents, etc., and have the following defects: First, although oil-soluble viscosity reducers can inhibit or disperse wax crystals, colloids, and asphaltenes, they cannot make them reach the true level. The size of t

Method used

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Effect test

Embodiment 1

[0045] The present invention is a kind of high-efficiency viscosity reducer that is used for thermal oil recovery process, and it is made up of the raw material of following weight percent:

[0046] 1) Biphenyl 4%;

[0047] 2) Diesel 35%;

[0048] 3) Sodium alkyl sulfonate 18%;

[0049] 4) Fusel oil 5%;

[0050] 5) Ethylene glycol butyl ether 10%;

[0051] 6) Alkylphenol formaldehyde resin 2%;

[0052] 7) Performic acid 0.5%,

[0053] Dicumyl peroxide 0.5%;

[0054] 8) Urea 20%;

[0055] 9) Cyclopentanone 5%

[0056] The content of chlorine element and sulfur element in the diesel oil is less than one thousandth. The high-efficiency viscosity reducer used in the thermal oil recovery process of the present invention is prepared by mixing the above-mentioned raw materials at normal temperature and pressure.

Embodiment 2

[0058] The present invention is a kind of high-efficiency viscosity reducer that is used for thermal oil recovery process, and it is made up of the raw material of following weight percent:

[0059] 1) Naphthalene 0.1%;

[0060] 2) 97.7% of natural aggregates of hydrocarbons in granular state at room temperature;

[0061] 3) Alkyltrimethylammonium chloride 0.1%;

[0062] 4) Fusel oil 0.5%;

[0063] 5) Diethylene glycol ethyl ether 0.5%;

[0064] 6) Polyacrylate 0.1%;

[0065] 7) Ammonium carbonate 0.5%;

[0066] 8) Cyclopentanone 0.5%;

[0067] The content of chlorine element and sulfur element in the hydrocarbon natural aggregates in granular state at normal temperature is less than 1 / 1000. The high-efficiency viscosity reducer used in the thermal oil recovery process of the present invention is prepared by mixing the above-mentioned raw materials at normal temperature and pressure.

Embodiment 3

[0069] The present invention is a kind of high-efficiency viscosity reducer that is used for thermal oil recovery process, and it is made up of the raw material of following weight percent:

[0070] 1) Methylnaphthalene 1%;

[0071] 2) Emulsified diesel oil 89%;

[0072] 3) Polyoxyethylene alkylphenol ether carboxylic acid sodium salt 1%;

[0073] 4) Fusel oil 1%;

[0074] 5) Diethylene glycol butyl ether 1%;

[0075] 6) Polyvinyl carboxylate 1%;

[0076] 7) Dibenzoyl peroxide 2%;

[0077] 8) Ammonium bicarbonate 2%;

[0078] 9) Hexanone 2%;

[0079] The contents of chlorine element and sulfur element in the emulsified diesel oil are less than one thousandth. The high-efficiency viscosity reducer used in the thermal oil recovery process of the present invention is prepared by mixing the above-mentioned raw materials at normal temperature and pressure.

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PUM

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Abstract

High efficiency viscosity-reducing agent which is used on THE thermal oil extraction technology, which is formed by the following raw materials with percentage by weight, firstly phenyl benzene, fused ring aromatic hydrocarbon or fused ring aromatic hydrocarbon derivative which does not contain chlorine element and sulfur element, secondly liquid petroleum product whose aromatic hydrocarbons content is no more than 5%, petroleum resin which is liquid state under the constant temperature or hydrocarbons natural aggregation which is particle state under the constant temperature, thirdly water-soluble anionic surface active agent, water-soluble non-ionic surface active agent, oil solubility anionic surface active agent or oil solubility non-ionic surface active agent, fourthly fusel oil, fifthly alcohol ether, sixthly oil solubility or water-soluble polymer which respectively has nonpolar portion which has eutectic crystal with ceresin wax molecular and polar portion which can make wax crystal system twisty on main chain and or branch chain, seventhly hyperoxide, eighthly carbamide, ammonium carbonate, ammonium acid carbonate or ammonium nitrite and ninthly ketone. The high efficiency viscosity-reducing agent has strong suitability, strong viscosity-reducing ability, safety and reliability, can largely reduce extract cost and increase the yield of oil pump, and increases the final recovery efficiency of oil reservoir.

Description

technical field [0001] The invention relates to a petroleum recovery additive, in particular to a high-efficiency viscosity reducer used in thermal oil recovery technology. Background technique [0002] At present, the thermal oil recovery process is mainly used in the recovery of heavy oil and high pour point oil, and viscosity reducers are generally used as auxiliary agents. The existing viscosity reducers are usually divided into water-based viscosity reducers and oil-based viscosity reducers. Water-based viscosity reducers are further divided into water-soluble viscosity reducers, oil-in-water emulsion viscosity reducers, oil-based viscosity reducers The base viscosity reducer is further divided into oil-soluble viscosity reducer and organic solvent type viscosity reducer, all of which have different defects. [0003] The water-soluble viscosity reducer is mainly composed of surfactant and water, and has the following defects when used in thermal oil recovery technology...

Claims

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Application Information

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IPC IPC(8): C09K8/524
Inventor 李向东
Owner 盘锦河升大地石油科技有限公司
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