CAJ | 학술논문

井壁失稳是目前制约煤层气规模化开发的关键问题之一。由岩石力学理论可知，煤岩的力学强度是井壁稳定性的决定因素之一。通过对宁武盆地煤岩进行系统力学研究，利用应力摩尔圆法求出宁武盆地主力煤岩的内摩擦角、内聚力等强度参数；建立横波与纵波幂律关系曲线，动态弹性模量与静态弹性模量间线性关系曲线及动静态泊松比间线性关系曲线，得出煤岩静态弹性参数以直接反应地层力学性质，解决了勘探开发中声波测井所得动态弹性参数无法真实反映地层力学特点的技术问题。
정벽실은시목전제약매층기규모화개발적관건문제지일。유암석역학이론가지，매암적역학강도시정벽은정성적결정인소지일。통과대저무분지매암진행계통역학연구，이용응력마이원법구출저무분지주력매암적내마찰각、내취력등강도삼수；건립횡파여종파멱률관계곡선，동태탄성모량여정태탄성모량간선성관계곡선급동정태박송비간선성관계곡선，득출매암정태탄성삼수이직접반응지층역학성질，해결료감탐개발중성파측정소득동태탄성삼수무법진실반영지층역학특점적기술문제。
How to develop the rich CBM resource now becomes an important project in China. The wellbore insta-bility is a key factor restricting CBM economical development. According to rock mechanics the mechanical charac-teristics of coal bed is critical factor for CBM wellbore stability, the study of the static mechanical characteristics has only developed in a limited level in China recently, this paper makes the systematic study on the mechanics of coal bed in Ningwu basin, got the extension and compressive strength, calculated the internal friction angle and the cohesion, built the power law relationship for longitudinal wave and transverse wave and also found out the linear relation between dynamic elastic parameters and static elastic parameters. It gives a technical method on how to get mechanics characteristics of formation on the basis of dynamic elastic parameters obtained from acoustic logging.