ABSTRACT
The reserve ratio of a thick oil layer above 2.0m in an L oilfield is more than 62.5%. Although it has entered the late stage of high water cut development, the thick oil layer is still the main object of oilfield development. With the deepening of oilfield development, the comprehensive water cut of the oilfield is gradually rising, resulting in the increasing difficulty of water polymer two drive production. Especially, the serious impact of structural heterogeneity and physical heterogeneity in thick oil layers has plagued the more efficient development of thick oil layers. In order to further excavate the remaining oil in the thick oil layer, this paper focuses on the three types of thick oil layers of class A, class B, and class C above 1.0m. Based on the genetic analysis and type division of the internal structure interface of the thick layer, the development characteristics of different types of structure interface are studied, which provides a geological basis for tapping the potential of water drive measures in the future.
