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在过去二十年内人们已经开发出种种定量的计算机正演地层模型。这些正演模型在石油工业中的实际应用局限于少数几种情况。其原因部分是从现有数据导出实际输入参数的一些具体困难,部分是对这些结果的预测值尚存疑虑。在本文中,我们讨论了两个商用的“定量动力地层学”(QDS)模拟软件包(SEDPAK和 PHIL~(TM))在 Outer Moray Firth 的古新世地层序列中的应用。我们展示了三维年代地层学是如何被用来确定二维模型的定量输入参数。高分辨率、持续时间短的“时间体”(Chronosomes)(0.1～200ka)的形态函数是推导相对海平面曲线、相对沉积速率、粒级分布以及沉降史的关键。当然,这些参数一般就是我们希望用QDS模型在远离钻井控制区域所要预测的特性。因此,QDS的作用也就是从预测转变为对由三维年代地层学所作出的预测假设在沉积学上的合理性进行检验。当然,我们还必须假定QDS模型本身在沉积学上是言之成理的。通常被掩盖了的层序地层学问题,诸如沉降与沉积脉动的相对时间,在QDS模型中是至关重要的。学会根据构造或气候事件诱发的沉积脉动,而不是根据更常见的假定的稳定沉积作用来控制这些变量,是开发动态层序地层学模型的另一个实际利益。
In the past two decades, a variety of quantitative computer modeling stratigraphy models have been developed. The practical application of these forward modeling in the oil industry is limited to a few cases. Part of the reason is that some of the specific difficulties in deriving actual input parameters from existing data are in part doubtful of the predictive value of these results. In this paper, we discuss the application of two commercially available Quantitative Dynamic Stratigraphy (QDS) simulation software packages (SEDPAK and PHIL ~ (TM)) to the Paleocene sequence of the Outer Moray Firth. We show how three-dimensional age stratigraphy is used to determine the quantitative input parameters of two-dimensional models. The high-resolution, short-duration Chronosomes (0.1-200 ka) shape function is the key to derive the relative sea level curve, relative sedimentation rate, particle size distribution, and sedimentation history. Of course, these parameters are generally the ones we want to predict with the QDS model away from well control areas. Therefore, the role of QDS is to move from predicting to verifying the rationality of sedimentology for predicting assumptions made by stratigraphy in three-dimensional age. Of course, we must also assume that the QDS model itself is sedimentologically justified. The commonly obscured sequence stratigraphy issues, such as the relative timing of settling and sedimentation ripple, are crucial in a QDS model. Learning to control these variables based on sedimentary pulsations induced by tectonic or climatic events rather than by the more common assumption of stable sedimentation is another tangible benefit of developing a dynamic sequence stratigraphic model.