Title:
SIDE AND BOTTOM WATER LAYER THERMAL RECOVERY METHOD ALLOWING ELECTRICALLY HEATING OIL DEPOSIT IN HORIZONTAL WELL
Document Type and Number:
WIPO Patent Application WO/2015/085674
Kind Code:
A1
Abstract:
A side and bottom water layer thermal recovery method allowing electrically heating oil deposit in a horizontal well. A water layer is electrically heated by using a plurality of horizontal wells that are located at the upper part of a side and bottom water layer of oil deposit and are 20-30m away from the oil layer, so that the temperature of the whole oil deposit is uniformly increased to a state in which in-place oil can flow, so as to achieve centralized heat supply by means of thermal recovery, thereby improving the thermal recovery efficiency of a single well. Also disclosed is an electric heating structure for a horizontal well. The electric heating structure is provided with a sieve pipe. A plurality of ferromagnetic permanent magnets is deployed at the upper part of the inner side of the sieve pipe. Spring-shaped electric heating rods serially connected together are disposed in the middle. A heat separation board is disposed in the position of a horizontal diameter. A half lower sieve pipe is sealed and is hollow and jointly separate heat in combination with the heat separation board, and the down transfer of heat energy is reduced.
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Inventors:
YU WENYING (CN)
WANG YIGANG (CN)
WANG YIGANG (CN)
Application Number:
PCT/CN2014/072422
Publication Date:
June 18, 2015
Filing Date:
February 22, 2014
Export Citation:
Assignee:
YU WENYING (CN)
International Classes:
E21B36/04; E21B43/24
Foreign References:
| CN102834585A | 2012-12-19 | |||
| CN202483541U | 2012-10-10 | |||
| CN101605965A | 2009-12-16 | |||
| RU2136858C1 | 1999-09-10 |
Other References:
LING, JIANJUN; ET AL.: "Literature Review on Thermal Production of Heavy Oil Reservoir with Bottom Water", SPECIAL OIL & GAS RESERVOIRS, vol. 3, no. 04, 31 August 2014 (2014-08-31), pages 55 - 58
GAO, DONGFANG ET AL.: "A Recovery Technique of Heavy Oil Reservoir with Bottom Water", FOREIGN OILFIELD ENGINEERING, no. 02, 28 February 1994 (1994-02-28), pages 12 - 13
GAO, DONGFANG ET AL.: "A Recovery Technique of Heavy Oil Reservoir with Bottom Water", FOREIGN OILFIELD ENGINEERING, no. 02, 28 February 1994 (1994-02-28), pages 12 - 13
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