数值沉积模拟在澳大利亚W区块沉积储层研究中的应用

利用古环境、古生物年龄、钻井岩性、岩心等资料，应用DinosoS软件对澳欠利亚W区块的Elang—Frigate组进行了数值沉积模拟。研究区重点层位Elang-Frigate组共划分为3个层序，海平面为向上脉动加深变化形式，东南方为主要物源方向．通过各个层序的构造图以及井资料读取的各个层序的残露厚度，利用软件自动·趺复古地貌、古构造的功能，得到了相对真实的沉积背景，利用这些参数进行了三维数值模拟，进一步得到了本地区沉积体系的时空展布特征。结果显示，该区的三角洲－河口湾沉积体系，具有早期浪控、晚期潮控，近源扇三角洲、相对远源三角洲的复合型沉积特点。

Application of Numerical Simulation in Research of Sedimentary Reservoirs of W Zone in Australia

The numerical depositional simulation in Elang to Frigate formations of W block in Australia was presented by means of Dinosos software and by utilizing such data as paleoenvironment,paleontological age,borehole lithologic characters and cores,etc.The key horizon i.e.Elang to Frigate formations in study area was divided into three sequence boundaries,step rising relative sea-level curve and major provenance in southeast direction,etc.Based on residual strata thickness got from logging data and structural maps of each sequence,the sedimentary background was figured out by palaeostructure and palaeogeomorphology reconstruction.A 3-D numerical simulation was carried out by means of these parameters,further,obtaining the time-spatial distribution characters of depositional system in the area.The results show that the study area is characterized by a deltaic and estuarine depositional system with wave-dominant delta in the early stage and tide-dominant delta in the late stage.There are near provenance fan-delta surround local highs and far provenance delta along the bay axis.