论文部分内容阅读
一般认为,高能沉积体是储层形成的有利相带之一,但对于碳酸盐岩来说,高能沉积相带仅是储层发育的基本条件之一,后期的成岩改造可能更为明显,它可将原生孔隙发育的高能沉积体转变为致密岩体。因此,碳酸盐岩储层的预测研究应将沉积相与成岩作用研究相结合。本文根据区内灯影组钻井岩芯的宏观、微观特征,结合物性资料,研究了滩相类型、特征、所经历的主要成岩类型及对储集性的影响,认为浅色的内碎屑滩、绵层状藻砂屑滩和鲕粒滩是有利于储层形成与演化的沉积相带,它们多分布于以资3、7井、资4井和资5井为中心的区块内,向其周边井区,这些有利滩相沉积体变薄、储集性变差。
It is generally believed that high-energy sedimentary bodies are one of favorable facies belts formed by reservoirs. However, for carbonate rocks, high-energy sedimentary facies belt is only one of the basic conditions for reservoir development. Later diagenetic alterations may be more obvious, It converts high-energy sedimentary bodies with primary pores into dense rocks. Therefore, the prediction of carbonate reservoirs should combine the study of sedimentary facies and diagenesis. Based on the macroscopic and microscopic characteristics of drilling cores in Dengying Group and the combination of physical properties, this paper studied the types and characteristics of the facies, the types of diagenesis experienced and their impact on the reservoir property. Layered phytoplankton sand beaches and oolitic beaches are sedimentary facies belts that are favorable to the formation and evolution of reservoirs. They are distributed in blocks centered on the 3,7 wells, the Zi4 wells and the Zi5 wells, The surrounding well area, these favorable beach facies thinning, poor storage.