HORIZONTAL WELL STAGED FRACTURING OIL PRODUCTION METHOD BY INJECTION AND PRODUCTION IN SAME WELL

摘要

A horizontal well staged fracturing oil production method by injection and production in the same well. Multiple fracturing cracks perpendicular to a horizontal wellbore are generated at different parts of an oil reservoir by horizontal well staged fracturing; one of the cracks is selected as a fluid injecting channel, and the adjacent cracks at two sides serve as crude oil production channels; displacement crude oil flows to the cracks at two sides along the crack in the middle; a double-oil-pipe segmented packing technology is combined to pack the crack and the adjacent two cracks inside the horizontal well; a fluid is injected in from the middle crack; the displacement crude oil flows to the horizontal wellbore from the adjacent cracks at two sides; and produced liquid flows outside the wellbore along the other oil pipe channel to form a staged same-well injection and production system in the same horizontal well.