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在加拿大的 Alberta Taber-Turin 地区,建立了两个独立的储层模型,用来模拟该区河道砂岩储油层。第一个储层模型描述,是以测井和岩芯数据为基础,这些数据是由部分油田区域内的六口生产井和两口干井中取得的,在这个范围内已进行了三维勘探。第二个储层模型描述对岩石物性参数做了些补充,这些岩石物性参数是用三维地震反射资料的岩性模型推断出来的。两种新的地震正演岩性模型技术能够划分开相隔很近的两个反射薄层的子波干涉效应,并允许可靠地用来估算薄层的储层参数。在这一研究中,提出了一个用地震岩性模拟技术改进的详细的储层地质模型,这个模型描绘了一个隐秘(Subtle)构造和地层特征,对于这个构造和地层特征,利用有效的钻井资料是描绘不出来的。给出了储层顶面构造图和产层岩性特征参数图包括厚度图、层速度图、孔隙度图和孔隙度一厚度图。在两口新井位置上,各自模型参数的预测对比证明,用地震资料做控制,可提高储层参数变化预测的精度。在我们这个模型里,没有包括两口新井的资料。以地震资料为基础的模拟方法,较之只用钻井资料计算的孔隙体积提高了20%,这一点对油田开发的经济决策有着潜在的影响。在这项研究中,地震资料的改进和导出的详细的信息,对下一步井位的选择和二次回采方法计划的制定部有极大的好处。
In the Alberta Taber-Turin region of Canada, two independent reservoir models were established to simulate river channel sandstone reservoirs in the area. The first reservoir model description was based on log and core data obtained from six production wells and two dry wells in some of the oilfield areas, where 3D exploration has been conducted. The second reservoir model description supplements petrophysical parameters that are inferred from lithological models of 3D seismic reflection data. Two new seismic forward lithology modeling techniques can separate the wavelet interference effects of two closely spaced reflective layers and allow reliable estimates of the reservoir’s reservoir parameters. In this study, a detailed reservoir geology model improved with seismic lithology modeling techniques is proposed, which depicts a subtle structure and stratigraphic features for which effective drilling data Is not pictured. The top layer tectonic map and the lithologic characteristic parameters of the pay zone are given, including thickness map, velocity map, porosity map and porosity-thickness map. In the position of two new wells, the prediction comparison of their model parameters proves that using the seismic data to control can improve the prediction accuracy of reservoir parameters. In our model, we did not include information on two new wells. Seismic data-based modeling methods have a 20% increase in pore volume compared to drilling data alone, which has a potential impact on economic decision-making in oilfield development. In this study, the detailed information on the improvement and derivation of seismic data is of great benefit to the selection of the next well location and to the planning department of the secondary recovery method.