兴隆台潜山带变质岩油藏采收率计算方法

Methods for determining recovery factor of metamorphic reservoir in Xinglongtai buried hill

在兴隆台潜山带亿吨级新增探明储量申报过程中,从石油地质储量到可采储量计算的关键是要合理、准确地确定采收率,它是衡量油田开发效果和开发水平的重要指标。由于油藏处在开发初期,受资料所限,采收率只能应用经验公式法、经验取值法、类比法和数值模拟法求取。取值合理与否的关键是明确影响采收率的主控因素。通过分析,明确了影响变质岩潜山油藏采收率的主控因素包括储集岩岩石类型、储层物性、油藏驱动类型、油藏类型和地层原油粘度等。通过类比主控参数,确定类比油藏为边台潜山,相对准确地确定了兴隆台潜山带石油技术可采储量,为亿吨级探明储量的申报奠定了基础。

For the newly added proved reserve of hundred million tons in Xinglongtai buried hill zone,the key is to ascertain the reasonable and accurate recovery factor for the reserves from OOIP to recoverable reserves.It is an important indicator to evaluate the effectiveness and performance of oil field development.In the early development of reservoir and limited by data,the recovery factor can only depend on the empirical formula,the experience,the analogy,and numerical simulation.The key in the process of adopting the accurate recovery factor is the ascertaining of main controlling factor.Based on analysis,the main controlling factors influencing the metamorphic buried hill reservoir recovery are clarified as:the type of reservoir rock and reservoir rock properties, reservoir driving mode,reservoir type,oil viscosity etc.By analogy of main controlling parameters,the Biantai buried hill reservoir is ascertained as the analogy reservoir,and then the technical recoverable factor is determined.It is the base for the reporting of proved reserve of hundred million tons of oil.