井间流动单元预测与剩余油气分布研究

依据储层的岩性特征、沉积微相、渗流特征、微观孔隙结构和储层非均质特征，结合储层的实际情况，选用孔隙度、渗透率、粒度中值、最大孔喉半径、流动层指数等5个参数，综合应用岩性-物性划分法以及流动层指数划分法进行了流动单元的定量划分，建立了河流相储层流动单元的E、G、M、P等4类流动单元模式。根据研究区内平面、垂向和井间流动单元分布，发现孤岛油田中一区上第三系中新统馆陶组5段剩余油气在馆陶组5段3层的东北部和中部相对富集。综合考虑井间流动单元排列方式和注、采井射开位置，建立了井间流动单元分布模型，有助于深入研究剩余油气的空间分布，为河流相储层剩余油气挖潜决策提供了依据和参考。

Prediction of Inter-well Flow Units and Study on Distribution of Remaining Oil and Gas

According to reservoir lithologic characteristics,sedimentary microfacies,percolation characteristics,microscopic pore structure and heterogeneity,and combining with the real situation of reservoirs,the lithology-physical property method and flow zone indicator(FZI) method are integrated to quantitatively divide flow units according to 5 selected parameters,including porosity,permeability,median grain diameter,maximum pore throat radius and FZI.Four types of flow unit modes,including E,G,M,and P,are established for reservoirs of fluvial facies.Based on the areal,vertical and interwell distribution of flow units in the Zhongyi Block of Gudao oilfield,the remaining oil and gas of the 5th member of Miocene Guantao Formation are concentrated in its 3rd interval in the northeastern and central parts of the block.According to the arrangement of interwell flow units and the perforation intervals in the injection and producing wells,distribution models of interwell flow units are established.They are helpful for the study of spatial distribution of remaining oil and gas and can provide a solid basis for tapping the potentials of reservoirs of fluvial facies.