Well group reforming comprehensive utilization method for waste oil wells

Abstract

The invention discloses a well group reforming comprehensive utilization method for waste oil wells, and belongs to a geothermal energy mining and utilizing technology. According to the method, the well sealing work on the waste oil wells is completed by carrying out sealing of the single well, perforation or perforation fracturing, sand flushing for well washing, upper sleeve reforming and water pumping test on the waste oil wells, and then combined utilization of a waste oil well group is completed by carrying out heating network connecting and effect test on the sealed single well. According to the method, the problem that the waste oil wells are left unused is solved, wastes are turned into treasures; a new way for utilization of the waste oil wells in an oil field is developed; meanwhile, a technical support is provided for development and utilization of energy with a thick heat storage layer, a large distribution area and high geothermal temperature; the energy saving and emission reducing effects are good; the waste oil well reforming cost is low, and the social and economical benefits are outstanding.

Description

technical field [0001] The invention belongs to the exploitation and utilization technology of geothermal energy, and mainly relates to the utilization technology of geothermal energy of abandoned oil wells. Background technique [0002] In the petroleum industry, with the increase of oil production, the output of oil wells in many oil fields has decreased year by year, and the number of abandoned oil wells has increased year by year. Taking Daqing Oilfield as an example, more than 10,000 oil wells have been scrapped. In order to prevent the destruction of the geological environment and the pollution of groundwater, the oilfield expends a lot of manpower, material resources and financial resources to close the wells and abandon them in the wilderness. On the other hand, in order to find new oil and gas resources, a large number of exploration wells are discarded every year. At present, most of them are abandoned and treated as abandoned wells. [0003] In recent years, ener...

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Problems solved by technology

[0011] The purpose of the present invention is to solve the above-mentioned problem that a large number of abandoned oil wells cannot be reused scientifically and rationally, research and design a comprehensive utilization method for the transformation of abandoned oil wells, so as to reduce the treatment cost of abandoned oil wells and provide underground heat for residents or residents by using the transformed abandoned oil wells. The purpose of industrial heating services, reducing environmental pollution, and reducing non-renewable energy consumption

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