盆地分析与宝龙山隐伏煤田的发现

Basin analysis and discovery of Baolongshan concealed coal field

以宝龙山煤田为例 ,论述了松辽盆地红层下找煤的方法和依据 ,利用地震与钻探资料 ,就盆地的形成机制、盆缘断裂的性质和演化、聚煤作用的时空变化、成煤环境、沉积相的空间配置、含煤性等进行了系统分析。研究表明 ,地震时间剖面的追踪对比、等时界面的连续性、超覆关系及其形态变化和反射波的内部结构等信息 ,特别有助于确定地层格架、分析断陷盆地形成和发展、探讨盆地的充填演化过程及其控制作用。从而推测松辽盆地西部斜坡带的道老杜—高力板、镇赉 -兴隆山、巨流河。

Baolongshan coalfield is taken as an exam ple to dissertate the method and reason of finding coal under red- beds from Songliao basin.Based on the data of seismic and drilling prospecting,forming mechanism of the basin,character and evolution of the basin m argin fault,the time and space variation of coal accumulation,allocation of sedimentary environment and facies,and coaly coefficient are discussed systematically.The research indicates that the tracing contrast of seismic cross- section,the continuity and super- coverage relationship of isochronous interface and its morphological change,and the internal structure of reflecting wave,are especially helpful to determine the framework of strata,to analyza the formation and development of fault depression,to discuss the filling evolution process and its control action.Based on the above study,the western slope of Songliao basin,including several sub- basins such as Daolaodu- Gaoliban,Zhenlai- Xinglongshan,Juliuhe,Zhanyu,and Xiboyinzi- Baolongshan,is speculated to be an important exploration targetarea of coal resources.