摘要
受单一分流河道间复杂接触关系及储层非均质性影响,QK油田剩余油分布复杂,开发效果变差,早期以小层为单元的构型研究无法满足油田后期开发的精度要求.利用岩心、测井及生产动态资料对QK油田明下段浅水三角洲砂体进行了储层构型研究,并在此基础上利用数值模拟研究对不同控制因素影响下剩余油分布模式进行了定量表征.结果表明研究区浅水三角洲复合砂体可划分为6~3级构型单元,分别对应浅水三角洲沉积体、三角洲前缘沉积体、复合河道及单一分流河道沉积.从垂向及平面两个方向对单一分流河道边界进行了识别,并确定了单一分流河道规模,单一分流河道厚度在1.5~4.0m之间,宽度为270~1700m,砂体宽厚比为90~425.在此基础上,利用数值模拟技术定量表征了储层厚度、夹层展布及注采井距三种因素对剩余油分布的影响,并针对性提出了注水井调剖、分层注水及井网加密三种开发对策.
Affected by complex contact relationships between single distributary channels and reservoir heteroge-neity,the distribution of remaining oil in QK oilfield is complex and the oilfield development effect becomesworse. Early stage reservoir architecture study based on small layers can not meet the requirements of later oil-field development accuracy. Using core,well logging and production performance data,reservoir configurations ofshallow water delta sandbodies in the lower Minghuazhen formation of QK oilfield were studied. On this basis,re-sidual oil control factors were quantitatively characterized by numerical simulation. Results show that the shallowwater delta sandbodies in the study area can be classified into 4 levels of reservoir configuration,which are deltabody,delta front sediment body,composite channel and single distributary channel. The boundaries of single dis-tributary channels were identified vertically and horizontally,and the scale of the single distributary channel wasdetermined. The single distributary channel thickness is between 1.5 and 4.0 m,the width is 270-1700 m,andthe width-thickness ratio of the sand body is 90-425. Numerical simulation was used to quantitatively character-ize the influence of reservoir thickness,interlayer distribution and injection-production well spacement on thedistribution of remaining oil. Three strategies were proposed to develop remaining oil better.
出处
《新疆石油天然气》
CAS
2019年第3期41-44,57,共5页
Xinjiang Oil & Gas
基金
“十三五”国家科技重大专项(2016ZX05058001)
