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江西新余山南井田的中生代煤系里,煤层属于中等变质程度。视电阻率呈高阻反映,人工放射性亦呈高脉冲数值反映。因而,这两条主要定性曲线都呈高峰状反应的层位被解释为煤,一般地说是不成问题的。然而客观实际却远非如此简单:在煤系地层中,除煤层以外,常见炭质泥岩和炭质粉砂岩等炭质岩层,它们在曲线上的幅度仅次于煤层,而且往往与煤层伴生,或上覆为顶板;或下伏为底板;或呈矸石夹于煤中,形成结构复杂的煤层。这样,给测井的定性、定厚工作造成一定的困难。在寻求解决这一困难的过程中,特别注意
In the Mesozoic coal measure of the Xinyu Shannan Minefield in Jiangxi Province, the coal seam belongs to a medium degree of metamorphism. Apparent resistivity showed high resistance, artificial radioactivity also showed high pulse values. Thus, the horizons of the two main qualitative curves are interpreted as coal, generally speaking not a problem. However, the objective reality is far from simple: In the coal measures strata, except for the coal seam, common carbonaceous mudstone such as carbonaceous mudstone and carbonaceous siltstone are only second to the coal seam in the curve and often associated with the coal seam. Or overlying the roof; or under the floor; or gangue sand caught in the coal to form a complex structure of the coal seam. In this way, to the logging of qualitative, fixed-thickness work has caused some difficulties. Pay particular attention to the process of seeking this solution