安塞油田坪桥水平井区储层精细描述

Reservoir Description of Pingqiao Horizontal Well Region,Ansai Oilfield

安塞油田坪桥水平井区长 6 1 1 小层为典型特低渗储层 ,主要沉积类型为三角洲前缘分流河道和分流间微相 ,通过对取心井的岩电关系分析 ,建立了岩石相测井解释模型 .在储层特征分析基础上 ,对水平井区长 6 1 1 小层完成了三维储层建模 ,内容包括井模型研究、三维构造建模、三维流动单元建模及三维岩石物理参数建模 .该区特低渗储层呈“叠合状”和“离散状”分布模式 ,所建三维流动单元模型及三维储层参数模型较客观地反映了地下储层特征 .

Chang 6 reservoir in Pingqiao horizontal well region is a typical low permeability one.The origin of the sand bodies is interpreted to be a river dominated delta.The main sedimentary microfacies are distributary channel and interdistributary deposits.Lithofacies logging interpretation models are established on the basis of logging interpretation of the cored well. 3D reservoir modelling is made for the Chang 6 reservoir based on careful descriptions of reservoir characteristics. The reservoir models include single well model, 3D structure model,3D flow unit model, and 3D petrophysical parameter models. The architecture models of the low permeability reservoir in the region display the types of overlapping and 'dispersion'.The reservoir models of 3D flow unit and 3D petrophysical parameters established in this study provide the geological bases for the petroleum development in the region. [WT5HZ]