胡151区延9储层流体微观渗流特征研究

以胡151区延9储层微观渗流特征为实验目的,利用真实砂岩微观模型进行研究认为:延9储层油驱水渗流类型以非均匀型网状渗流为主,均匀渗流和指状渗流为辅;水驱油时的孔隙空间特征主要以指状渗流为主,局部可以观察到网状渗流;孔道中水驱油方式主要呈现以非活塞式驱替为主;无水采油期时间短,驱油效率较低;微观残余油类型主要为簇状残余油;孔喉结构非均质性是影响驱油效率的主要因素,储层润湿性是次要影响因素,储层物性和驱替压力对驱油效率影响较小。

Hu151 area Yan9 reservoir fluid micro-flow characteristics

Aiming at Hu 151 block Yan 9 formation micro-flow characteristics,the research on true sand rock micro model shows that Yan 9 formation oil driving water seepage are mainly heterogeneous reticular seepage supplemented by homogeneous seepage and finger like seepage,porous structure of water driving oil featured mainly by finger like seep-age,reticular seepage can be observed partly;the pore's water driving oil are mainly non-piston like displacement.Wa-ter free oil production period is short,the oil driving efficien-cy is low.The cluster residual oil is main type.Pore throat structure heterogeneous are main factors affecting the effi-ciency of oil displacement,wettability is secondary,reservoir physical property and displacement pressure affect less.