摘要
长垣外围扶杨油层为低、特低渗透性储层,骨架砂体主要为河道砂,部分区块裂缝相对发育,油田注采比高。从岩心观察和测井砂岩厚度解释着手,储层可分为有效砂岩和非有效砂岩。结合室内岩心吸水实验,证实非有效砂岩有一定的吸水能力。通过构建典型区块三维全地层地质模型,应用数值模拟技术量化区块的注入水构成,明确了高注采比主要是由非有效砂岩和非储层的吸水所致。应用最优理论方法,计算出低渗区块合理注采比为2.0~2.5,特低渗区块合理注采比为2.5~3.9。
The Fuyang Formation in the outer area of Changyuan is a low and extra-low permeability reservoir,the skeletal sandbody is mainly river sandbody,some blocks have relatively developed fractures,and the oilfield has a high injection-to-production ratio.Starting from core observation and logging interpretation of sandstone thickness,the reservoir can be divided into effective sandstone and non-effective sandstone.Combined with the indoor core water absorption experiments,it is confirmed that the noneffective sandstone has a certain water absorption ability.By constructing a three-dimensional full stratigraphic geological model of a typical block and applying numerical simulation techniques to quantify the injection water composition of the block,it is clear that the high injection-to-production ratio is mainly caused by the water absorption of non-effective sandstone and non-reservoir.Applying the optimization theory method,a reasonable injection-to-production ratio is 2.0 to 2.5 for low permeability blocks and 2.5 to 3.9 for extralow permeability blocks,respectively.
作者
罗立娟
LUO Lijuan(No.10 Oil Production Plant of Daqing Oilfield Co.Ltd.,PetroChina,Daqing 166405,China)
出处
《复杂油气藏》
2022年第4期52-57,共6页
Complex Hydrocarbon Reservoirs
基金
国家科技重大专项“大型油气田及煤层气开发”(2016ZX05013006)。
关键词
低、特低渗透
注水构成
注采比
扶杨油层
low and extra-low permeability
injection water composition
injection-to-production ratio
Fuyang oil reservoir
作者简介
罗立娟(1981-),女,工程师,现主要从事油田开发研究工作。E-mail:325075510@qq.com。
