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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Quantification of exhumation from sonic velocity data, Cooper Basin, Australia, and implications for hydrocarbon exploration
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Quantification of exhumation from sonic velocity data, Cooper Basin, Australia, and implications for hydrocarbon exploration

机译：来自澳大利亚库珀盆地的声速数据的掘尸量化及其对油气勘探的意义

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摘要

Exhumation (defined as rock uplift minus surface uplift) in the Cooper Basin of South Australia and Queensland has been quantified using the compaction methodology. The sonic log, which is strongly controlled by the amount of porosity, is an appropriate indicator of compaction, and hence is used for quantifying exhumation from compaction. The traditional way of estimating exhumation based on the degree of overcompaction of a single shale unit has been modified and five units ranging in age from Permian to Triassic have been analysed. The results reveal that exhumation increases eastwards from the South Australia into the Queensland sector of the basin. The results show that exhumation in Late Triassic - Early Jurassic times, after the Cooper Basin deposition, seems to be 200-400 m higher than exhumation in Late Cretaceous - Tertiary times, after the Eromanga Basin deposition. This study has major implications for hydrocarbon exploration. Maturation of source rocks will be greater for any given geothermal history if exhumation is incorporated in maturation modelling. Exhumation values can also be used to improve porosity predictions of reservoir units in undrilled targets.
机译：南澳大利亚和昆士兰州库珀盆地的掘尸（定义为岩石隆起减去地表隆起）已使用压实方法进行了量化。受孔隙度强烈控制的声波测井曲线是压实的合适指标，因此可用于量化压实产生的掘出物。基于单个页岩单元过度压实程度的传统估算发掘方式已被修改，并且已分析了从二叠纪到三叠纪的五个年龄范围的单元。结果表明，发掘活动从南澳大利亚向盆地的昆士兰州向东增加。结果表明，在库珀盆地沉积后的三叠纪-侏罗纪晚期的发掘活动比在Eromanga盆地沉积后的白垩纪-第三纪的发掘活动高出200-400 m。这项研究对油气勘探具有重要意义。如果在成熟度建模中结合掘尸，则对于任何给定的地热历史，烃源岩的成熟度都会更大。挖掘值还可以用于改善未钻探目标中储层单元的孔隙度预测。

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