一种煤层协同增透方法及造穴装置
By using hydraulic perforation or mechanical cavity-making technology with coal seam cavity-making devices, the problem of blank zones around the permeability enhancement zone of coal seams after acid fracturing has been solved, thereby improving coal seam permeability and gas extraction efficiency, solving the problem of fracture closure under high ground stress, and achieving efficient, uniform, and long-term extraction of coal seam gas.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING UNIV
- Filing Date
- 2025-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing acid fracturing technology, under high ground stress conditions, results in a blank zone around the permeability enhancement area of the coal seam, leading to low gas extraction efficiency and easy closure of fractures, making it difficult to achieve long-term flow conduction capacity.
Coal seam cavity-forming devices are used for hydraulic or mechanical cavity-forming to supplement pressure relief and permeability enhancement. Microseismic monitoring technology is combined to determine the range of blank zones, and efficient unblocking and long-term maintenance of the fracture network are achieved through physical-chemical combined action.
It effectively eliminated blank zones, significantly improved coal seam permeability and gas extraction efficiency, achieved dual optimization in time and space, and improved operational efficiency.
Smart Images
Figure CN120312188B_ABST
Abstract
Citation Information
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