岩石物理参数的流体敏感性分析

岩石物理参数分析是储层流体检测和岩性识别的基础，针对不同岩石物理参数对储层流体的敏感性各异，提出了岩石物理流体敏感性参数的构建方法，并对不同的岩石物理参数及组合进行流体敏感性的分析。在岩石物理参数分类基础上，构建由剪性参数和体性参数组成的组合参数，将体性参数入表示为干岩石参量和流体参量两部分的综合贡献，参考实验数据，选择最佳系数c值，使构建的组合参数最大程度地反映流体的贡献。在东营北带，通过实验室中深层岩石样品的测定和计算，得到基本岩石物理参数，按照流体敏感参数的定义对该区的不同岩石物理参数及组合进行流体敏感性分析，结果表明，构建的组合参数对储层流体的敏感程度要高得多，这对寻求敏感性较好的岩石物理参数进行储层流体识别具有指示意义。

Fluid sensitivity analysis of petrophysical parameters

Petrophysical parameters analysis is the base of reservoir fluid detection and lithology identification. Based on the differ- ence of reservoir fluid sensitivity of different petrophysical parameters, this paper put forward construction method of fluid sensitivi- ty parameters of petrophysies, and conducted fluid sensitivity analysis of different petrophysical parameters and their combinations. Based on classification of different petrophysical parameters, combined parameters made up of shear parameters and bulk parame- ters was established and bulk paremeter k was expressed as the result of integrate contributions by dry rock parameters and fluid parameters. The reference to experiment data and selection of optimal coefficient c made it possible that established combined pa- rameters could best reflect fluid contribution. In the northern belt of Dongying Area, through mensuration and calculation of rock samples from mid-deep layers in laboratory, a series of basic petrophysical parameters were obtained. Fluid sensitivity of different petrophysical parameters and their combinations were analyzed according to the definition of fluid sensitivity parameters. The re- sults indicated reservoir fluid sensitivity of established combined parameters was much higher, which had guiding values for seek- ing better sensitive petrophysical parameters to identify reservoir fluids.