齐3-17-5块莲花油层开采特征分析及采收率预测

莲花油层经过近30年的开发,已经进入到了低速开发阶段。目前采油速度只有0.033%。首先对莲花油层开发阶段进行划分并分析各阶段开采特征。然后利用产量递减曲线法对其采收率进行预测,以判断储层最终可采储量及其采出程度。研究结果表明,莲花油层最终可采储量约为50.813×104 t,最终采收率为13.177%,可采储量采出程度已高达95.094%,剩余可采储量极少。因此,莲花油层迫切需要找到更为合理的开发方式对油田进行二次开发。结论对指导莲花油层二次开发具有重要的现实意义。

Analysis of Development Characteristics and Prediction of Oil Recovery Factor of Lianhua Oil-layer in Qi 3-17-5 Block

After thirty years of development in Lianhua oil-layer, it has entered into the stage of low speed development with an oil production rate of 0.033%. In this paper, it firstly divides the development period of Lianhua oil-layer into different phases and analyzes the development characteristics in every phase. Then predict the oil recovery factor by using the production-decline curve method to estimate the final recoverable reserves and recovery percent of reserves. Results show that, the final recoverable reserves of Lianhua oil-layer is about 50.813?04t, and the oil recovery factor is 13.177%. At present, recovery percent of recoverable reserves has been 95.094% that the remaining recoverable reserves are in the least. Therefore, it urgently needs to find a more reasonable development model to do secondary development of Lianhua oil-layer. The conclusions of this paper have an important realistic significance of guiding the Lianhua oil-layer to do secondary development.