疏松砂岩水平井临界生产压差预测模型的建立  

Prediction of critical drawdown pressure for horizontal well of unconsolidated sand

作　　者：杨蕾[1] 张志全[1] 刘宁[1] 刘辉[1] 游园[1] 

机构地区：[1]长江大学石油工程学院,湖北荆州434023

出　　处：《内蒙古石油化工》2010年第13期136-137,共2页Inner Mongolia Petrochemical Industry

摘　　要：油井的出砂已经成为困扰疏松砂岩油藏生产的一个严重的问题,科学有效地进行出砂预测对于指导油田高效开发具有重要的意义。本文分析了疏松砂岩油层出砂机理,在油层出砂机理的基础上,从井壁稳定性的力学机理出发,对水平井井壁三维应力进行了分析,利用Mohr-Coulomb破坏准则,建立了水平井出砂临界生产压差模型,并通过对某区块的8口井进行了计算,数据结果表明:此8口井的临界压差与实际生产状况基本相近,因此利用该模型计算临界生产压差,可以为油田生产提供指导依据。sand production has become a severe problem of unconsolidated sand.Guiding oil field production forecast is essential significance by Scientific and effective manner.This paper analyzes the mechanism of unconsolidated sand reservoir sand production.Based on the mechanism of sand production and Wellhole Stability,it analyzes three-dimensional pressure of horizontal well.A mechanical model of critical drawdown pressure of sand production is established for horizontal well using Mohr-Coulomb damage criteria.We conduct the example calculation in terms of the eight wells of a block.The calculated results show that it can meet the acutal situation.Hence Using this model,calculating the critical drawdown pressure can provide guidance for oil field.production.

关 键 词：水平井 出砂 出砂机理 井壁稳定性 临界压差 

分 类 号：TE319[石油与天然气工程—油气田开发工程]