板桥油田馆陶组低电阻率岩性油气藏评价技术研究  

Evaluation of Lithologic Low Resistivity Oil Reservoir in Banqiao Oilfield

作　　者：王晓杰[1] 彭仕宓[1] 李早红 马建英 

机构地区：[1]中国石油大学资源与信息学院,北京102249 [2]中国石油海外研究中心,北京100004 [3]渤海钻探工程公司测井公司,天津300280

出　　处：《测井技术》2008年第3期237-240,共4页Well Logging Technology

摘　　要：讨论了大港油田板桥地区馆陶组地层低电阻率岩性油层的形成机理及相应的评价方法。在测井曲线响应特征不明显的情况下,从粘土矿物类型、沉积微相类别等方面详细分析了该区低电阻率岩性油层主控因素。馆陶组粘土矿物以蒙脱石为主,蒙脱石含量与泥质含量成正比,泥质含量相对较高,地层电阻率下降,从而形成低电阻率油气层。蒙脱石的阳离子交换及吸水膨胀是该区馆陶组地层形成低电阻率油气层的直接原因。提出了低电阻率油层应该以沉积微相的不同建立定性识别标准和定量评价方法,按照测井曲线响应特征结合该区的沉积背景,分析不同储层沉积微相类型,按照不同的沉积微相类型分别建立测井解释标准。实际应用地质效果明显。The formative mechanism and evaluation of lithologic low resistivity oil reservoir of Guantao formation in Banqiao Oilfield in Dagang are discussed. It is considered that montmorillonite is the major clay mineral of Guantao formation in Banqiao Oilfield, the cation exchange capacity and bibulous expansion of the montmorillonite are the direct causes of forming the low resistivity oil reservoir; at the same time, the sedimentary environment influences indirectly the decrement degree since the content of the montmorillonite is controlled by the sedimentary environment; so types of sedimentary microfacies of the low resistivity oil reservoirs should be analyzed, then the criterion of logging interpretation of the low resistivity oil reservoir should be separately established for different type of sedimentary microfacies. The consideration is effective in Dagang Oilfiled.

关 键 词：油气评价 低电阻率 岩性 粘土矿物 孔喉结构 

分 类 号：P631.814[天文地球—地质矿产勘探]