CAJ | 학술논문

通过煤矿井下实测，直观描述了煤层水平孔的失稳、垮塌特征，统计分析了煤层水平孔稳定性与埋深、煤坚固性之间的关系，并应用晋城地区现有煤层气水平井的实际排采数据进行了对比分析。认识到影响煤层气水平井井壁稳定性的主要地质因素是：小微构造、地应力、埋藏深度，其中小微构造导致水平井眼易穿过构造软煤区，地应力、埋藏深度会增加井壁的受力导致井壁失稳垮塌。研究结果为从地质方面预防井壁失稳提供了理论依据。
통과매광정하실측，직관묘술료매층수평공적실은、과탑특정，통계분석료매층수평공은정성여매심、매견고성지간적관계，병응용진성지구현유매층기수평정적실제배채수거진행료대비분석。인식도영향매층기수평정정벽은정성적주요지질인소시：소미구조、지응력、매장심도，기중소미구조도치수평정안역천과구조연매구，지응력、매장심도회증가정벽적수력도치정벽실은과탑。연구결과위종지질방면예방정벽실은제공료이론의거。
This paper intuitively describes the features of instability and collapse of coalbed horizontal wells by downhole measurement, analyzes the relation between the coalbed horizontal well stability and burial depth and coal sturdiness, and compares and analyzes the actual drainage data of the available CBM horizontal wells in Jincheng District. This paper identiifes the main geologic factors affecting the CBM horizontal well stability as below: small and micro structures, ground stress and burial depth. The small and micro structures cause the horizontal hole to easily penetrate the soft coalbed, and ground stress and burial depth may increase the stress on the well wall and hence cause wellbore instability and collapse. The conclusions in this paper provide theoretical basis for preventing wellbore instability from geology.