摘要
涩北气田储层胶结疏松,地层易出砂。准确地预测地层出砂对后期确定合适的防砂工艺是非常必要的。采用纵波时差、出砂指数、组合模量和斯伦贝谢比等4种出砂预测模型对涩北气田纵向和横向出砂规律进行了分析验证。同时,采用经验模型法、BP模型法和Arco模型法预测出砂临界生产压差,并与现场实际值进行对比,认为Arco模型较为合理。最后,通过室内模拟实验,建立了出砂预测模型,经实际出砂统计数据验证,偏差小于15%,可用于现场出砂量预测。
Reservoir formations of Sebei gasfield are unconsolidated and are prone to sand production.Accurate sand-production predictions are necessary for consequent selections of sand-control methods.This paper analysed and verified the vertical and lateral sand-production laws of reservoir formations through four different empirical prediction models,including compressional wave slowness,sanding index,combined modulus and Schlumberger ratio.Meanwhile,this paper predicted critical sand-production pressure differential through empirical,BP and Arco models,and obtained that the Arco model is more proper through comparison with field test data.Finally,a sand-production prediction model built in laboratories was demonstrated in this contribution,whose deviation is within 15% through correlation with real sand-production statistical data.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2012年第5期948-951,共4页
Natural Gas Geoscience
基金
中国石油重大科技专项"柴达木盆地油气勘探开发关键技术研究"课题(编号:07-01Z-01-07)资助
关键词
涩北气田
疏松砂岩气藏
出砂预测
Sebei gasfield
Unconsolidated gas reservoir
Sand production prediction
