测井技术2024，Vol.48Issue(3)：308-316,9.DOI:10.16489/j.issn.1004-1338.2024.03.004
低含水油水两相流等效介电常数模型
Equivalent Dielectric Permittivity Model of Low Water Cut Oil-Water Two-Phase Flow
摘要
Abstract
The capacitance method is widely used to measure the water content of oil-water two-phase flow, whether it is the surface oil-water measurement or the stratification test of the production profile in the well. To measure the water holdup (water phase volume fraction), it is necessary to establish the relationship between the water holdup and the sensor capacitance, so it is necessary to establish the theoretical or empirical model of the miscible equivalent dielectric constant and the water holdup. Since the formation water produced from wells and tap water used in surface laboratory calibration have good electrical conductivity at low and medium frequencies, considering only the dielectric property without considering the electrical conductivity will have a significant impact on the accuracy of water retention measurement. Based on the effective electric field theory of dielectric polarization, the equivalent dielectric constant model of oil-water two-phase flow is established, considering water as a good conductor under the condition of low water content and fine bubble flow. According to this model, the equivalent permittivity of oil-water two-phase flow is determined only by the water holdup and the permittivity of oil phase, and has nothing to do with the permittivity of water phase and the conductivity of water phase. The correctness of the model is verified by preliminary experiments. The research is of great significance for the design and field application of the water content sensor for oil-water two-phase flow when the oil is continuous phase.关键词
油水两相流/电容持水率计/持水率/有效电场/等效介电常数Key words
oil-water two-phase flow/capacitance water holdup meter/water holdup/effective electric field/equivalent dielectric permittivity分类
天文与地球科学引用本文复制引用
曲婧慧,刘兴斌,刘冬梅,邓宇恒,刘大勇,杨韵桐..低含水油水两相流等效介电常数模型[J].测井技术,2024,48(3):308-316,9.基金项目
国家自然科学基金项目"网络模型的智能分层注水井压力脉冲数据传输方法"(52174021) （52174021）
