孔隙结构与地层压力相结合的储层产能预测技术

Combination Technology of the Pore Structure and Formation Pressure for Productivity Prediction

为指导低孔隙度低渗透率等复杂油气层措施改造,实现规模效益开发,需要准确预测储层产能。从达西渗流产量公式出发,综合分析了歧口凹陷不同物性油层产能的主控因素。当储层原油性质与开采方式一致时,正常压力储层的产能主要受储层孔隙结构控制;异常压力储层的产能受储层孔隙结构与地层压力共同控制。针对歧口凹陷储层特征,建立了一套基于孔隙结构与地层压力相结合的储层产能和压裂效果预测方法,并将该方法应用到生产实践中,取得了良好的应用效果。

Accurate reservoir capacity prediction is necessary for rehabilitation of complex reservoir with low porosity and low permeability, so as to achieve economic value and coefficient development. Based on Darcy flow production formulas, we detailed the main controlling factors of reservoir capacity in the different pay zones of Qikou depression. When the reservoir oil properties are in accordance with the oil production method, the reservoir capacity is mainly controlled by pore structure in the normal pressure formation, while in the abnormal pressure formation the reservoir capacity is controlled by pore structure and formation pressure as well. In accordance with the reservoir feature of Qikou depression, we established a reservoir production and fracturing effect prediction method by combining pore structure and formation pressure. This method is applied to the production practice, and getting good effect.