摘要
根据压力数据中噪音对压力导数的影响随时间快速减弱的特点,针对地面流量恒定、流动期内定井储的压力数据,根据井筒物质平衡方程,采用指数流量模型按反向分段光滑拟合算法及约束条件,恢复出在开关井后井筒的续流流量,在此基础上,利用Ilk反褶积算法消除指定比例的井储效应,恢复出受井储效应影响的早期压力响应,并利用恢复的径向流直线段进行参数解释。含0.03MPa随机噪音的压力数据测试表明,方法稳定、结果准确。
The impact of noise data on the pressure derivative is characterized by rapid dampening with time,and the after-flow rate for the closure of constant surface rate with constant wellbore storage coefficient is recovered by segmented exponential function in inverted order according to the wellbore material balance equation.Based on this recovered after-flow rate,the early-time radial flow is uncovered by D.Ilk's pressure-rate deconvolution algorithm by removing specified percent of wellbore storage effect,and parameters of reservoir and wellbore are interpreted according to this recovered radial flow.This method is very stable and accurate according to the data test of pressure which contains 30 kPa random noise.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期87-91,共5页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家重大科技专项“大型油气田及煤层气开发”课题(2008ZX05024-002)
关键词
试井
反褶积
井储效应
流态恢复
参数解释
well test
deconvolution
wellbore storage effect
flow recovery
parameter interpretation
