摘要
为研究鄂尔多斯盆地中部致密油储层的强非均质性,给致密油勘探开发提供依据,综合利用野外露头、岩心、薄片、测井等数据,多角度对鄂尔多斯盆地中部吴起—志丹地区致密油储层非均质性进行分析,建立储层结构非均质性模型。研究结果表明,研究区储层隔夹层类型包括钙质隔夹层、高塑性岩屑隔夹层和细粒沉积隔夹层,不同隔夹层沉积机理不同,分别以水平式、斜交式分布于储层中,在空间上相互连接和交织,构成网状的封隔空间,造成储层非均质性严重。受其影响,同一油藏不同部位油水性质不同,油藏连通性差,油水关系复杂,无统一油水界面。致密油勘探中应重视隔夹层测井解释对比,提高油层预测成功率,同时应用水平井+体积压裂技术可降低非均质性对油田开发的影响。
In order to study the strong heterogeneity of tight oil reservoir in central part of Ordos basin and provide the basis for exploration and development of tight oil,the heterogeneity of tight oil reservoir in Wuqi-zhidan area of the central part of Ordos basin has been analyzed from different angles and the heterogeneity model of reservoir structure has been established by the comprehensive data of outcrop,cores,thin section,and logging etc.Research results showed that the reservoirs have many different types of interlayers such as calcareous layer,high plastic rock fragment,and fine particles deposition etc.with different deposition mechanism.They are distributed with horizontal and oblique forms in the reservoirs interconnected and interwoven to form a network of enclosed space that result in the strong heterogeneity of reservoir.Therefore,the property of oil and water in the different position of the same reservoir is different,featured with poor connectivity in the reservoir,complicated oil-water relation,and no uniform oil-water interface.In the exploration of tight oil,logging interpretation and contrast should be paid attention for the interlayers to improve the prediction success rate of payzone.The technology of horizontal wells with volume fracturing can lower the effect of heterogeneity on the oilfield development.
作者
葛云锦
崔露
Ge Yunjin;Cui Lu
出处
《采油工程》
2017年第4期61-66,83,共7页
Oil Production Engineering
