CA2155035A1 - Method and Apparatus for Oil Well Stimulation - Google Patents
Method and Apparatus for Oil Well StimulationInfo
- Publication number
- CA2155035A1 CA2155035A1 CA 2155035 CA2155035A CA2155035A1 CA 2155035 A1 CA2155035 A1 CA 2155035A1 CA 2155035 CA2155035 CA 2155035 CA 2155035 A CA2155035 A CA 2155035A CA 2155035 A1 CA2155035 A1 CA 2155035A1
- Authority
- CA
- Canada
- Prior art keywords
- solvent
- wax
- production
- formation
- packed bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Fats And Perfumes (AREA)
Abstract
This invention describes a method of stimulating production from an oil well by removing solid wax deposits from a production zone. An electrical resistance heater comprised of a packed bed of spherical heating elements is lowered through the tubing on a wireline and placed adjacent to the perforations. Solvent is pumped through the heater to raise its temperature by 200°C and then into the formation to contact wax deposits. The solid wax deposits are liquified and together with the oil and the solvent form a single liquid phase. The wax is then removed from the formation by placing the well back on production. Because the invention completely avoids the use of either water or gas, the saturation of the water and gas phases in the formation is minimized, thereby maximizing the mobility of the liquid phase containing the wax and facilitating the removal of the liquified wax from the treatment area before it reprecipitates. The packed bed heater has a large surface area and a large heat transfer coefficient, so high power rates (150 kW) can be achieved within a compact volume (6m long x 5cm id) without solvent degradation.By heating the solvent to a high temperature, a minimum volume of solvent is required, thereby minimizing production downtime and solvent costs. The burnout and catastrophic failure problem usually associated with resistive heaters is avoided due to the multiplicity of current paths through the packed bed.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/590,755 | 1990-10-01 | ||
US07/590,755 US5120935A (en) | 1990-10-01 | 1990-10-01 | Method and apparatus for oil well stimulation utilizing electrically heated solvents |
CA002052202A CA2052202C (en) | 1990-10-01 | 1991-09-25 | Method and apparatus for oil well stimulation |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2155035A1 true CA2155035A1 (en) | 1992-04-02 |
CA2155035C CA2155035C (en) | 1996-12-10 |
Family
ID=25674804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002155035A Expired - Fee Related CA2155035C (en) | 1990-10-01 | 1991-09-25 | Method and apparatus for oil well stimulation |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2155035C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8985205B2 (en) | 2009-12-21 | 2015-03-24 | N-Solv Heavy Oil Corporation | Multi-step solvent extraction process for heavy oil reservoirs |
US9739125B2 (en) | 2014-12-18 | 2017-08-22 | Chevron U.S.A. Inc. | Method for upgrading in situ heavy oil |
-
1991
- 1991-09-25 CA CA002155035A patent/CA2155035C/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8985205B2 (en) | 2009-12-21 | 2015-03-24 | N-Solv Heavy Oil Corporation | Multi-step solvent extraction process for heavy oil reservoirs |
US9739125B2 (en) | 2014-12-18 | 2017-08-22 | Chevron U.S.A. Inc. | Method for upgrading in situ heavy oil |
Also Published As
Publication number | Publication date |
---|---|
CA2155035C (en) | 1996-12-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |