智能分注分层流量测量与自动校准技术研究应用

Research and Application of Intelligent Separate Layer Water Injection Flow Rate Measurement and Self-Calibration Technology

智能分注工艺能够全自动对每个注入层流量进行实时监测与调控,有效解决层间与层内差异,实现均衡注采开发。井下分层流量计长期工作的可靠性、持续测量的准确性是实现精细分注,提高注水合格率的关键。依据孔板式差压流量计工作原理,设计了流量测量电路,通过采用差压-流量分段曲线拟合数学模型提高了流量计算精度,通过井下分层流量自动校准技术,解决了井下流量长期持续测量的准确性,提高水驱开发效果,为油藏的分析评价提供准确的数据支撑。同时井下分层流量校准自动执行,流量解释算法程序自动更新,整个过程无需人工操作,节省了人力、物力,促进油田数智化发展。

The intelligent separate layer water injection process can fully monitor and control the flow rate of each injection layer in real time,effectively solve the differences between and within layers,and achieve balanced injection-production development.The reliability of down-hole layered flowmeter in long-term operation and the accuracy of continuous measurement are the key to realize fine injection and improve the pass rate of water injection.The flow measurement circuit is designed according to the working principle of the orifice differential pressure flowmeter,and the flow calculation accuracy is improved by using the differential pressure-flow segmental curve fitting mathematical model.The downhole layered flow self-calibration technology solves the long-term continuous measurement accuracy of downhole flow,improves the waterflooding development effect,and provides accurate data support for reservoir analysis and evaluation.At the same time,the downhole layered flow calibration is automatically performed,and the flow interpretation algorithm program is automatically updated,and the whole process does not require human operation,saving manpower and material resources,and promoting the development of oilfield digital intelligence.