加密钻井后北二东油层发育状况再认识

油田开发过程中，对油藏的认识不是一成不变，也不可能一劳永逸，需要不断地对油层发育状况进行再认识。北二东试验区经过40年的开发调整，大部分已进入特高含水期开采阶段，油田产量逐年递减。为了增加可采储量，加密井完钻后，运用取心井和新井解释资料，对北二东试验区块进行油层发育状况重新认识评价。搞清该区块各油层组有效厚度、渗透率等储层特征参数及砂岩分布特点，为原油的稳产提供了有力的保障。

Re-Understanding of Reservoir Feature Conditions of the Northeast Pilot Area No.2 after Infill Drilling

Abstract: The understanding of the reservoir is not constantly unchanged during the process of oilfield exploration, so the status of reservoir development must be recognized. The most parts of the northeast pilot area No.2 have entered extra high water cut production period after 40 years of development and adjustment, and the oil production gradually declines. In order to increase recoverable reserves, the reservoir development status of the northeast pilot area No.2 is recognized and evaluated by using the data of drill core sample hole and the interpretation data of new wells after infill drilling. The effective thickness, permeability and sandstone distribution of every reservoir group are found out, which will provide a strong guarantee for the oil stable production. Keywords: infill well; reservoir; geological features; understanding