Error estimation in decompacted subsidence curves
Error estimation in decompacted subsidence curves
复制标题
解压沉降曲线中的误差估计
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
C. Docherty
中科院分区：
文献类型：
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作者：
D. Waltham;C. Taberner;C. Docherty
基于解压沉积物厚度的沉降曲线通常在不指示深度或年龄误差的情况下显示。这使得他们的解释含糊不清，导致沉降脉冲的错误识别和稳定沉降周期的错误识别。误差分析也应成为基于此类沉降曲线的热成熟研究的一部分。由于解压计算的迭代和非线性性质，沉降曲线的形式误差分析是一个复杂的问题。本文提出了一种基于蒙特卡罗模拟的替代方法，允许计算沉降曲线和误差估计。我们还表明，即使显示了误差，也不能根据此类沉降曲线来识别沉降脉冲和稳定沉降周期，因为沉降曲线上连续点的误差是相关的。相反，必须在计算沉降曲线集合的同时计算沉降速率曲线集合，以便可以计算平均沉降速率曲线以及相关的误差估计。
Subsidence curves, based on decompacted sediment thicknesses, are generally displayed without indicating depth or age errors. This makes their interpretation ambiguous, leading to incorrect identification of subsidence pulses and incorrect identification of periods of steady subsidence. Error analysis should also form part of thermal maturation studies based on such subsidence curves. Formal error analysis of subsidence curves is a complex problem because of the iterative and nonlinear nature of the decompaction calculations. This paper presents an alternative approach, based on Monte Carlo simulation, that allows subsidence curves to be calculated along with error estimates. We also show that identification of subsidence pulses and identification of periods of steady subsidence cannot be made on the basis of such subsidence curves, even when errors are shown, because errors on successive points on the subsidence curves are correlated. Instead, an ensemble of subsidence rate curves must be calculated at the same time as the ensemble of subsidence curves so that a mean subsidence rate curve can be calculated along with associated error estimates.