作　　者： (刘哲）; (刘季业）; (马剑坤）;

机构地区： 成都理工大学能源学院,四川成都610059

出　　处： 《石油化工应用》 2017年第8期104-109,共6页

摘　　要： 油藏在勘探开发初期需要确定油水界面,进而在确定油藏油柱高度等各项参数的基础上计算储量,但一般含边底水的低渗油藏在油水界面与纯油带底界间存在油水过渡带,且油水过渡带地质特征与开发效果均和纯油层有所区别,因此正确认识油水过渡带特征对低渗透油藏开发研究有重要意义。以乌尔禾油田乌5井区为例,在测井及取心资料的基础上,精细描述了百口泉组油藏地质特征,利用试油、测压资料计算了油藏油水界面深度,并根据毛管压力曲线及油水两相相渗曲线,结合储层流体性质计算了油水过渡带高度。结果表明,受毛管压力曲线、流体性质及储层渗流特征影响,乌5井区百口泉组油藏油水过渡带较厚,整个开发层系均位于油水过渡带中。 In the initial stage of reservoir development, OWC need to be determined, on the basis of calculation the height of oil column and other parameters to calculated reserves.But oil/water transition zone existence between low permeability reserve with edge water and basal ground water and bottom band of pure oil, and the geological characteristics and development effect of OWC zone is different from pure oil layer.Therefore it is great importance significance to correct understanding the characteristics of oil-water transition zones is of great importance to the development of low permeable reservoirs. Take the Wuerhe oilfield Wu5 well area as an example, on the basis of well logging and coring datas, geological characteristics of Baikouquan reservoir were finely descripted. The OWC depth is calculated by oil test and pressure measurement data. According to capillary pressure curve and oil-water two-phase percolation curve, combined with reservoir fluid property, the height of oil-water transition zone was calculated. The result shows it is affected by capillary pressure curve,fluid property and reservoir seepage characteristics. The Wu 5 well area of Baikouquan reservoir oil-water transitional zone is thick, and the entire development layers are located in oilwater transitional zone.

关 键 词： 低渗透 油水过渡带 毛管压力曲线 油水界面