厚层油藏隔夹层建模技术在安棚主体区的应用

Application of interlayer modeling technology for reservoir of thick layers in Anpeng main area

针对因常规建模方法无法精准描述厚层油藏隔夹层展布,从而制约剩余油预测和开发方案制定的问题,利用钻井高分辨率的地质信息,提出了一种厚层油藏隔夹层建模新技术。以赵凹油田安棚主体区核三段Ⅳ油组2小层为例,通过调整砂泥岩分层层位,以砂岩顶底界面作为新的分层层位,刻画砂体隔夹层分布;采用赋值与序贯指示结合的"相"约束"相"的方法,建立隔夹层展布的三维地质模型。在此模型的基础上,采用相控参数建模技术建立的物性分布模型,与水下扇沉积的储层物性特征吻合程度较高,能够客观地反映储层隔夹层的空间展布,为后续油藏工程工作奠定了坚实的基础。

Aiming at the problem that the conventional modeling method cannot accurately describe the distribution of interlayer in thick reservoir, which restricts the prediction of remaining oil and the formulation of development plan, a new modeling technology of interlayer in thick reservoir is proposed by using high-resolution geological information of drilling. Taking the Ⅳ2 layer of the third member of Hetaoyuan formation in the Anpeng main area in Zhaowa oilfield as an example, by adjusting the sand shale layer position and taking the top and bottom of sandstone as a new layer, the distribution of sand body interlayer is depicted. Both of the facies–constraint–facies method and the sequential indicator modeling technology are used to predict the arrangement of interlayers. On the basis of this model, the physical property distribution model established by the phase control parameter modeling technology is highly consistent with the physical property characteristics of the reservoir deposited by the underwater fan, which can objectively reflect the spatial distribution of the reservoir interlayer and lay a solid foundation for the follow-up reservoir engineering.