Technological process of thermochemistry dehydrating for ultra thick oil

A process method and ultra-heavy oil technology, applied in the field of thermochemical dehydration of ultra-heavy oil, can solve the problems of high viscosity of ultra-heavy oil, complicated process, complex equipment, etc., and meet the requirements of low temperature resistance, low operating cost, and The effect of less heat load

Inactive Publication Date: 2005-10-26
LIAOHE GASOLINEEUM EXPLORATION BUREAU
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Problems solved by technology

[0003] However, due to the extremely high viscosity and high density of super heavy oil in Liaohe Oilfield, some super heavy oil has a density higher than that of water, which is quite different from foreign super heavy oil in physical properties. The above super heavy oil dehydration process is not suitable for my country's national conditions. At present, in China, only ultra-heavy oil mixed with thin oil for viscosity reduction and dehydration, and high-temperature dehydration of heavy oil are used. The process is complicated, the cost is high, and the equipment is complicated.

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  • Technological process of thermochemistry dehydrating for ultra thick oil

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Embodiment 1

[0018] Embodiment 1: One-stage static sedimentation dehydration (for ultra-heavy oil with a water content lower than 50%) process: the entry of super-heavy oil is mainly carried out by pipeline transportation and vehicle pulling, and the crude oil is transported through pipelines and oil unloading tanks, that is, pipeline transportation When crude oil enters the station, the incoming oil at 70-75°C is first measured under the condition of pipeline transportation pressure of 0.4MPa, and demulsifiers LH-2 and RS-2 oil-soluble demulsifiers are added, while the crude oil transported into the station by car is firstly ground After weighing, it is unloaded into the oil tank, boosted and metered by the unloading pump, and then added demulsifier and mixed with pipeline crude oil to enter the heat exchanger to raise the temperature to 90°C, and then enter a section of crude oil settling tank for dehydration. Experiments show that The density of heavy oil and the density of water are at ...

Embodiment 2

[0021] Two-stage static sedimentation dehydration process (for ultra-heavy oil with high water content, generally greater than 50%). Crude oil with high water content enters the station. After dosing, the temperature is raised to 80°C through the first-stage heat exchanger, and then enters the first-stage static settling tank. After most of the free water is released, the second-stage dosing, dehydration and boosting are carried out, and the temperature of the second-stage heat exchanger is raised to 90°C. ℃, into the second-stage static settling tank for settling and dehydration. The one-stage and two-stage sedimentation methods are the same static sedimentation dehydration process. The first-stage sedimentation time is 24 hours, and the second-stage sedimentation time is 96 hours. After the sedimentation, the water content of crude oil can be controlled below 5%.

Embodiment 3

[0023] The heating and heat tracing of the super heavy oil dehydration system described in the present invention adopts the indirect heat supply process with heat transfer oil as the heat carrier. Coking, heat transfer oil can be recycled, but no loss. In the static settling tank, a floating oil discharge mechanism is adopted, which floats with the liquid in the tank, so that the oil receiving port is always near the liquid surface, and the oil-water interface will not be disturbed even when the oil is discharged, ensuring the oil discharge The water content in oil is at the lowest value. The patent number of the floating oil delivery mechanism is: ZL95232982.4.

[0024] The structure of the heat exchanger is composed of two-layer spiral tubes, the outer tube is the heat transfer oil heat medium, and the inner tube is the heated super thick oil medium. The heat exchanger is made of stainless steel thin-walled tube material, which is extruded into The corrugated tube-side heat...

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Abstract

The present invention relates to a thermochemical dehydration process for ultrahenvy oil. Said invention is characterized by that it adopts thermochemical static settlement dehydration and indirect heat-supplying mode using heat transfer oil as thermal carrier, and adopts nodel tubular heat exchange equipment to implement thermochemical dehydration process of ultraheavy oil. In the course of dehydration LH-2 or RS-2 oil-soluble demulsifier with a certain concentration is added in the ultraheavy oil, and the water content of dehydrated and settled raw oil can be up to 3-5% standard.

Description

Technical field: [0001] The invention relates to a thermochemical dehydration process for super heavy oil, which belongs to the heavy oil chemical dehydration technology category. Background technique: [0002] China's Liaohe, Shengli, Xinjiang and other oilfields have high viscosity of super heavy oil. At present, the viscosity of super heavy oil at 50°C is up to 187000mPa·s, which contains high colloidal asphalt and has a small density difference with water. The mining method has a high water content in the oil, but the dehydrated super heavy oil can still be used for petroleum refining. Therefore, the dehydrated super heavy oil has high use value. At present, the foreign super heavy oil dehydration technology is in the exploratory stage. Take Canada's Pinghe and Lenghu centralized treatment stations as an example. They still use a two-stage dehydration process. The first stage uses a horizontal three-phase separator, and the second stage uses electric dehydration. The hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/00
Inventor 郭文奇臧秀萍张维志赵文学陈国玉邓裕明周庆林
Owner LIAOHE GASOLINEEUM EXPLORATION BUREAU
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