砾石尺寸评价与优选方法研究  

A New Model for Gravel Size Evaluation and the Optimization

作　　者：赵东伟[1] 董长银[1] 张琪[1] 

机构地区：[1]石油大学(华东)石油工程学院,山东东营257061

出　　处：《石油钻探技术》2004年第4期63-65,共3页Petroleum Drilling Techniques

基　　金：中石化先导项目"疏松砂岩油藏防砂工艺综合决策系统"的部分研究内容。

摘　　要：砾石尺寸的选择是砾石充填防砂的关键步骤之一。较大的砾石尺寸有利于获得较高的产能,但同时会导致严重的砂侵,小的砾石尺寸挡砂效果好但对油井产能的影响较大。分析和研究了地层砂侵入砾石层的特性和砾石层压降计算方法,评价了其挡砂效果及对产能的影响,建立了砾石尺寸综合评价方法。采用Saucier、Depriester和schwartz 3种常规选择方法得到3种砾石尺寸结果,分别对其进行综合评价,优选出最佳砾石尺寸。The gravel size decision is the key step of successful gravel-packing sand control. Coarse gravels are helpful to obtain higher productivity, but it maybe leads to serious formation sand invasion. Fine gravel size can block formation sand well, but it has passive influence on well productivity. The sand blocking effect and Influence on productivity are evaluated by analyzing the invasion characteristic of formation sand into gravel pack and the calculation of pressure drop across gravel pack. Then a new integrated evaluation method for gravel size is evolved. The optimum gravel size is decision by comparing the three gravel size results, which are obtained by three normal gravel size decision methods, that is, Saucier, Depriester and Schwartz.

关 键 词：砾石充填防砂工艺 计算方法 砾石层 地层 射孔相位角 套管 

分 类 号：TE257.3[石油与天然气工程—油气井工程]