摘要
对于流体类型判别,其关键为束缚水饱和度的确定。现有的实验测定法需要大量岩心分析数据,且实验测定周期较长;统计分析方法受区域影响较严重。基于常规测井资料的束缚水饱和度综合确定方法是根据钻井液对储层的侵入特征及侵入带中钻井液滤液、束缚水电阻率和束缚水饱和度的关系,通过严密的理论推导,利用常规测井资料综合计算确定束缚水饱和度。通过在不同区块多口井的应用,此方法计算的束缚水饱和度确定的流体类型与试油结论一致,能准确判别纯气层、气水同产层、低阻气层的流体类型;适用于浅气层和中深层的流体类型判别,且受区域影响较小,适用于新老区块,可推广应用。
For the fluid type distinguishment,the critical point is the determination of irreducible water saturation.The existing determinating methods need large core interpretation data,and the pe riod of experimental determination is quite long.The statistical anal ysis methods are strongly influenced by regional aspect.The tompre hensive determination method of the irreducible water saturation based on the routine logging data,is cachlated out with routine log ging data by using rigorous theoretical analysis,based on the drilling fluid's invasion features to the reservoir and the relationship between drilling fluid filtrate,irreducible water resistivity and irreducible wa ter saturation in the invasion zone.With many wells applications in different regions,the fluid type determined by the irreducible water saturation caculated with this method,is quite consistent with the production testing results.And it can accurately distinguish the fluid type in the pure gas layer,gas and water layer and low-resistivity gas layer.It is suitable for fluid type determination in shallow gas layer and middle deep layers,and can be hardly affected by regional facters.This method can be used in new and old oil and gas areas,its application should be promoted.
出处
《钻采工艺》
CAS
北大核心
2010年第B06期37-40,共4页
Drilling & Production Technology
关键词
流体类型判别
束缚水
饱和度
常规测井
理论模型
推导
fluid type distinguishment,irreducible water saturation,routine logging data,theory medel,deduction
