岩性约束反演方法及应用

本文采用非线性反演技术建立了岩性约束反演计算方法，用于地层岩性解释和储层模拟、描述等方面。文中讨论了岩性正演数学模型的建立、初始模型的选取和约束条件对反演结果的影响。给出了综合利用地震、测井和地质资料计算孔隙度和泥质含量的反演结果，并分析了反演精度。理论模型计算结果说明了岩性约束反演的可行性和正确性。并给出Ｓｕｎ工作站上应用该软件处理某油田实际资料的岩性反演结果。

LITHOLOGICAL CONSTRAINED INVERSION AND ITS APPILCATION

In this paper,the authors establish a lithologic constrained inversion algorithm by nonlinear inversion and use it for the litho stratigraphic interpretation,reservoir modeling and reservoir characterizing.The paper deals with the geological modeling and lithologic forward modeling,ilustrates the initial model chosing and the constraints contributing to the inversion result.This method gives the computing result of the porosity and the shallness by integrating seismic,geologic and borehole data and analyzes the converging speed and inversion precision.The theory model computing results show that the lithologic constrained inversion is an accurate and efficient method.This method is of fastness and utility. In the paper,the authors give an example of the application to real data of oil field in some region using the lithological constrained inversion system.