透镜体砂岩油藏相控建模研究

透镜体砂岩油藏是指由同时沉积的泥岩所包围的、完全充满着油气或部分充满油气的断续条带状砂体或透镜状砂体构成的。砂岩透镜体的成藏及其孔隙度、渗透率等的变化都与岩石的形成过程相关。针对砂岩透镜体油藏的非均质性严重、相变快等特点，采用相控建模软件，结合确定建模与随机建模的方法，建立出油藏的构造模型、沉积相模型参数分布模型。根据结果可以看出，沉积相概率分布与井沉积相基本符合，储层的三维模型垂向砂体识别精度相对较高，在与井栅状图对比修改之后总体的符合程度很高。以沉积相作为约束条件时，渗透率与孔隙度的正态变化图形与标准正态分布曲线相似程度较高；拟合出的渗透率、孔隙度及净毛比的图形与井栅状图相互对比修改后总体符合程度高，为油藏的后续开发奠定了基础。

Phase control modeling of lens body sandstone reservoir

The lenticular sandstone reservoir refers to an intermittent strip-shaped sand body or lenticular sand body entirely surrounded by oil or gas or partially filled with oil and gas，surrounded by simultaneously deposited mudstone.The accumulation of sandstone lenses and the changes in porosity and permeability are all related to the formation process of the rocks.In view of the characteristics of serious heterogeneity and rapid phase change in sandstone lens reservoirs，the phased modelling software was used in this paper，combined with the methods of deterministic and stochastic modeling，to establish the reservoir structural model and sedimentary model parameters.The distribution model shows that the accuracy of vertical sand body recognition is high in the three-dimensional model of the reservoir，and the probability distribution of the sedimentary facies and the error of the well sedimentary facies are relatively small，and the overall degree of coincidence with the well-grid pattern is high.When the sedimentary facies is used as a constraint condition，the normal change pattern of permeability and porosity is similar to the standard normal distribution curve；the fitted figure of permeability，porosity，and net hair ratio is in agreement with the well pattern.The overall degree of conformity after revision was high，laying the foundation for the subsequent development of the reservoir.