Abstract Shale lithofacies identification and prediction are of great importance for the successful shale gas and oil exploration. Based on the well and seismic fine calibration, extraction, and optimization of seismic attributes, root mean square (RMS) amplitude analysis is used to predict the spatial–temporal distribution of various lithofacies in the fifth organic-matter-rich interval, and the prediction results are confirmed by the logging data and geological background. The results indicate that in the early expansion system tract, dolomitic shale and calcareous shale were widely developed and argillaceous shale, silty shale, and argillaceous siltstone only developed in the periphery of deep depression. With the lake level rising, argillaceous shale and calcareous shale were well-developed, and argillaceous shale interbedded with silty shale or argillaceous siltstone developed in deep or semi-deep lake. In the late expansion system tract, argillaceous shale was widely deposited in the deepest sag; calcareous shale presented in eastern sag with belt distribution.

中文翻译：

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泌阳坳陷古近系河桃源页岩区岩相非均质性地震预测

摘要 页岩岩相识别与预测对于页岩油气勘探的成功具有重要意义。以井地震精细标定、提取、优化地震属性为基础，利用均方根振幅分析预测第五富有机质层段各岩相时空分布，预测结果得到测井资料和地质背景的证实。结果表明，在早期扩张体系域中，白云质页岩和钙质页岩广泛发育，泥质页岩、粉质页岩和泥质粉砂岩仅在深坳陷外围发育。随着湖面水位上升，泥质页岩和钙质页岩发育良好，泥质页岩与深湖或半深湖发育的粉质页岩或泥质粉砂岩互层。晚期扩张体系域最深凹陷广泛沉积泥质页岩；东部凹陷钙质页岩呈带状分布。