玄武岩油藏岩石物理研究方法

军马站开发区位于黄骅坳陷孔店潜山构造带北端，为孔隙及裂缝发育的双重介质复杂玄武岩油藏，主力目的层沙三段玄武岩划分为爆发相和溢流相的３类玄武岩储集层，储集层岩性、物性、油藏类型及流体性质为国内少见。介绍了根据该特殊储集层特点开展岩石物理研究的思路和方法：利用测井资料成功地识别了３类玄武岩储集层；利用测井资料，结合常规及全直径岩样物性分析资料，建立了泥质含量及孔隙度解释模型；利用ＣＴ扫描成像新方法，在密闭取心和油基钻井液取心资料不多的情况下，成功地求取了含油饱和度；利用井周声波成像等测井新技术判断裂缝，结合ＣＴ扫描求取了裂缝孔隙度；建立了适用的有效厚度划分标准。在此基础上，对该区所有完钻井目的层段的测井资料进行了重新处理、解释，复查油层有效厚度，增产效果显著。图３表１参４（邹冬平摘

A petrophysical study on basalt reservoir in Junmazhan development area.

The Junmazhan development block is a complex basalt reservoir with doublemedia of pores and fractures. There are explosive and overflow facies. Its lithologic feature, physical property, reservoir pattern and fluid property are very special and seldom encountered in China. Base on the reservoir characteristics, the paper introduces the thinking and methodology for making successful petrophysical studyidentifying basalt and its three subdivisions with logging data; establishing shale percentage and porosity interpretation model by incorporation logging and conventional and fulldiameter physical property analysis; determining oil saturation in the case of lake of sealing coring and oilbase drilling mud coring data by new CT scanning imaging; determining fractures by wellbore sonic imaging and then getting fracture porosity by combining CT scanning and establishing appropriate division criterion of effective thickness.