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为了深化对厚油层内部结构认识,进一步挖潜剩余油,应用岩心、测井、生产动态等资料,从复合河道、单一河道以及河道增生单元3个层次对文留油田25东块EsL(4-2)2小层厚油层砂体进行了构型分析。研究表明,文25东区块为以水下分流河道为主的三角洲前缘沉积;复合河道以连片状为主,砂体厚度大,连续性好;单一河道以窄条带状分布为主,横向连续性差,纵向连续性好,其接触方式及其界面渗透性决定了地下油水的运移状况;河道增生单元以填积型为主,产状近水平,延伸距离短,一般不超过2个井距。储层构型对剩余油分布有明显的控制作用,剩余油一般富集在构型界面处。
In order to deepen the understanding of the internal structure of thick oil reservoirs and tap the remaining oil further, the data of core, well logging, production dynamics and other data were used to simulate the EsL (4-2) of 25 East Block of Wenliu Oilfield from three levels of compound channel, single channel and river channel hyperplasia unit ) 2 small thick reservoir sand body configuration analysis. The study shows that the east block of Wen 25 is a delta front deposit mainly composed of underwater distributary channel. The composite channel is dominated by contiguous sheet and the thickness of the sand body is large and the continuity is good. The single channel is dominated by narrow strip- The lateral continuity is poor and the longitudinal continuity is good. The contact mode and the permeability of the interface determine the migration of underground oil and water. The river accretion unit is mainly of the type of filling and filling, with near-horizontal and short extension, usually no more than 2 Well spacing. The reservoir configuration has obvious control over the remaining oil distribution, and the remaining oil is generally enriched at the configuration interface.