Title:
METHOD FOR EXPLOITING OIL AND GAS BY CONTINUOUSLY HEATING FORMATION WATER AT TEMPERATURE LOWER THAN BOILING POINT OF WATER
Document Type and Number:
WIPO Patent Application WO/2023/116798
Kind Code:
A1
Abstract:
A method for exploiting oil and gas by continuously heating formation water at a temperature lower than the boiling point of water. The process of oil and gas production comprises the process of preheating oil and gas reservoirs and the process of exploiting oil and gas. A horizontal well is used to continuously heat formation water at a temperature lower than the boiling point of water, and the preheating of the oil reservoir is stopped under the condition in which crude oil in the entire oil reservoir flows and is ready for exploitation. Then, while exploiting the oil and gas, the formation water is continuously heated at a temperature lower than that of the preheating phase. The heating is stopped when the water content of the production well reaches 90%, and the remaining oil and gas is exploited by using waste heat until production has ended, so as to reduce the consumption of water resources caused by water vaporization during the process of oil and gas production, compensate for formation energy, compensate for the loss of heat energy inside the oil reservoir, ensure that the crude oil is in a good flow state, and delay the intrusion of bottom water, thereby increasing the recovery rate of oil and gas reservoirs and reducing energy consumption per ton of oil. The heating horizontal well has a built-in heating apparatus which is arranged in a water layer or an oil layer; and the formation water comprises water in the water layer of natural oil and gas reservoirs, intruding water in oil and gas reservoirs, and manually injected water.
Inventors:
YU WENYING (CN)
LU ZHENGUO (CN)
WANG YIGANG (CN)
LU ZHENGUO (CN)
WANG YIGANG (CN)
Application Number:
PCT/CN2022/140868
Publication Date:
June 29, 2023
Filing Date:
December 22, 2022
Export Citation:
Assignee:
BEIJING RED BLUE BLACK ENERGY TECH CO LTD (CN)
International Classes:
E21B43/24
Foreign References:
| CN114183109A | 2022-03-15 | |||
| CN103615215A | 2014-03-05 | |||
| CN110905470A | 2020-03-24 | |||
| US4319635A | 1982-03-16 |
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