338 results about "Explosion hazard" patented technology

The invention discloses a static blasting fracturing method used for exploitation of shale gas and other low permeability oil and gas reservoirs. The method includes the steps that a producing well is drilled to an oil and gas reservoir, and after well cementation, perforation or drilling is conducted on a production horizon to obtain an expansion hole; a blasting agent wrapped by a biodegradable film is put into the well, and carried by a hydrolytic enzyme solution to the expansion hole; under the action of the hydrolytic enzyme, the biodegradable film is hydrolyzed and then releases the blasting agent, the size of the blasting agent expands continuously after the blasting agent reacts with water and generates expansion pressure to continuously fracture the reservoir, so that cracks are formed; the fracturing is repeated for one to two times, the cracks are expanded through expansion stress, new cracks are extended out, and the cracks become a communicated crack network. Environment-friendly type non-explosion dangerous goods are used as the blasting material, purchasing, transporting and storing are safe and reliable, and using is convenient; when the method is used for fracturing and transforming the oil and gas reservoir, the action time of one-time fracturing is long, the acting efficiency is high, a communicated crack network channel can be formed through repeated fracturing, and the method is good in fracturing effect, low in fracturing cost and wide in application range.