高含水油藏水淹层测井评价方法

Logging evaluation method for flooded layer in high water content reservoir

大港油田YQ区经过几十年的开发,特别是1969年注水开发以来,其主力油组已进入高含水、高采出程度的开采中后期,油层水淹严重,目前年产油量62×10^(4)t,综合含水已达92.1%,采出程度达到45.1%。为了提高开发效果,搞清区块剩余油分布,需对该区的储层进行水淹层测井评价研究。通过目的区块储层特征分析,以电阻率相对值技术、可动流体分析方法为理论,建立了储层参数计算模型,研发了一套实用的水淹层测井解释软件,测井解释符合率提高了10个百分点,取得了良好的应用效果。

After decades of development in YQ area of Dagang Oilfield,especially since the water injection development in 1969,the main oil group has entered the middle and late stage of high water content and high extraction degree,and the oil layer is seriously flooded.At present,the annual oil output is 62104t,the comprehensive water content has reached 92.1%,and the extraction degree has reached 45.1%.In order to improve the development effect and understand the distribution of residual oil in the block,it is necessary to evaluate the reservoir in the area.Through the characteristic analysis of reservoir layer in the target block,with the theory of resistivity relative value technology and dynamic fluid analysis method,the calculation model of reservoir parameters was established,and a set of practical logging logging interpretation software was developed.The concordance rate of logging interpretation was increased by 10 percentage points,and good application effect was achieved.