Method for layering, stage multi-level blasting, hole expanding and crack expanding of oil-gas-bearing rock
A technology for oil and gas rocks and oil and gas, which is applied in the field of layered, segmented and multi-stage blasting and cracking expansion of oil and gas rocks. Convenience, enhanced shale gas penetration, and simple process
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[0015] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0016] figure 1 As shown, the shale layer of a certain oil-gas-bearing rock 1 is about 20m thick. The drilling rig drills a vertical hole to the oil-gas-bearing rock 1, builds a deflection at the center of the shale layer, and drills the curved section and the horizontal section. From the vertical section to the horizontal section through the curved section , the horizontal segment extends to the predetermined position.
[0017] The casing 2 is used to contact and fix the external shale body, and the casing extends to the curved section. In the horizontal section, the light pipe 3 is used to contact and fix the external shale body, and the interlaced position of the light pipe 3 and the casing 2 is sealed with a packer 5. The light pipe 3 is set to a predetermined length in the horizontal section, and the remaining horizontal section except the light pi...
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