基于流动单元的测井储层参数解释模型

油气储层普遍存在非均质性,但在常规测井解释中只以砂层组或单砂层作为解释单元,而忽视了砂层内部的物性及渗流特征的差异,造成储集层测井解释的精度不高.储集层流动单元是一个横向和垂向上连续的储集带,它作为地下流体渗流的基本单元,综合反映了储集层的岩性、物性及微观孔喉特征.在不同类型的流动单元内建立不同的渗透率测井解释模型,模型计算出的渗透率的准确度更高,且反映了储集层沉积特征和非均质性,为地质建模提供了可靠的渗透率参数.

Model of Well Logging Reservoir Parameters Interpretation Based on Flow Units

Hydrocarbon reservoirs are in general heterogeneous.Conventional log analysis sometimes gets unsatisfactory results because it only considers a group of sand bodies as one interpretation unit,and ignores the variation of permeability within the unit.A flow unit is a laterally and vertically continuous reservoir region.As a basic seepage unit of subsurface fluid,the flow unit reflects comprehensively the reservoir's lithology,physical feature and micro pore throat characteristics.This paper develops well log interpretation models with different permeabilities in respective types of flow units.The models improve the accuracy of permeability computation and reflect the sedimentary characteristics and heterogeneity in detail.The outcomes provide reliable parameters for developing geologic model and reservoir simulation.