Water treating method for hot recovering heavy oil

A heavy oil and energy recovery technology, which is applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of high production fluid temperature, achieve the effects of promoting mixing, increasing steam speed, and reducing clogging dangerous effect

Inactive Publication Date: 2005-08-31
AQUA PURE VENTURES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The state of the art for thermal actuation is to drive reservoirs hard to increase recovery of heavy oil, resulting in higher production fluid temperatures at production wellheads

Method used

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  • Water treating method for hot recovering heavy oil
  • Water treating method for hot recovering heavy oil
  • Water treating method for hot recovering heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0201] The calculations for this example are a means of demonstrating the heat balance around the reboiler heat exchanger. This example represents a project designed to recover 53,000 USGPD (200.63m 3 / day) The basis for the design of a distillation unit for clean distilled water.

[0202] Heat Exchanger Information

[0203] Surface area 3,200ft 2 (297m 2 )

[0204] Type Sealed (gasketed) plate and frame

[0205] U 542BTU hr -1 ft -2 f -1 (3077S -1 m -2 ℃ -1 )

[0206] Corrected LMTD 10.40F (5.778°C)

[0207] Calculate load (3,200)*(542)*(10.40)

[0208] 18,041,224 BTU hr -1 (5.287MW)

[0209] Calculate heat flux (18,041,224) / (3200)(17.785KWm 2 )

[0210] 5638BTU hr -1 ft -2 (17.785KW / m 2 )

[0211] condensation side

[0212] Inlet Conditions 289°F @21.0psia (Superheat)

[0213] (142.8℃@145KPa)

[0214] Outlet conditions 231.8°F@20.9psia(111°C@144KPa)

[0215] Saturation condensing temperature 232.0°F...

Embodiment 2

[0241] Design and build a prototype to recover 10,000 Usgpd (37.85m 3 / day) clean distilled water. The device is tested over an extended period of time, during which detailed performance test data is collected. The pilot operation ran successfully for four months with negligible plugging detected in the reboiler and thermal separation. The equipment used in the pilot tests included the Spencer TM Model GF36204E blower compressor, its differential pressure is 3.0psia (20.7KPa). A single-pass plate and frame heat exchanger was also used during the tests.

[0242] parameters

unit

Leachate

Feed (2)

discharge

about 10% (2)

dealt with

effluent (2)

BOD

COD

TOC

TSS

VSS

TDS

calcium

magnesium

sodium

iron

Total P

Expressed in N

ammonia

CaCO 3 surface

Alkalinity

Chlorine

Sulfate

Total phenols

Tota...

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PUM

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Abstract

There is disclosed a method and apparatus for treating produced water from a heavy oil thermal recovery unit to achieve water recovery and recycle levels of greater than 80% and as high as 100% to achieve zero discharge criteria. The method includes the initial steps of capturing the waste heat energy from the high pressure steam separator located downstream of the steam generators. Further, transferring the heat energy into a heated separator and reboiler exchanger to distill oil reservo ir produced water and recover distilled water and a concentrated brine or solid product. The heated separator concentrated stream is circulated through the reboiler exchanger t o maintain from 1 % to about 50% mass vapour in the stream returning to the heated separator and prevent fouling and scaling. The apparatus also generates distilled water includes low pressure waste energy separator, heated separator and vapour compressor combing to the compelling circle-loop.

Description

technical field [0001] The present invention relates to a high-efficiency water distillation method and equipment, and more particularly, the present invention relates to a high-efficiency water distillation method for heat recovery of heavy oil that minimizes clogging and fouling during long-term operation of the equipment. Background technique [0002] In many parts of the world, heavy oil, a hydrocarbon material with a much higher viscosity or a much lower API gravity (below 20° API, typically 7°-12° API) than conventional crude oil, is more difficult to recover and requires Subterranean reservoirs are produced using enhanced thermal stimulation techniques. Specifically, in Western Canada, heavy oil producers use techniques for injecting high pressure steam into reservoirs at pressures of approximately 1,500-3,000 psig (10.342-20.684 MPa), and in some cases as low as 150 psi (1.0342 MPa). Steam heat energy is produced by known steam generator equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/24E21B43/40
CPCE21B43/24E21B43/40E21B43/35
Inventor 史蒂夫·克雷森亚克亚历克斯·布朗
Owner AQUA PURE VENTURES
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