歧口凹陷中浅层疏松砂岩录井显示特征

The features of mud logging shows for the loose sandstone in shallow-middle zones in Qikou sag

大港油田歧口凹陷中浅层以港东地区明化镇组和馆陶组、港西地区馆陶组为主要目的层,经过40余年的勘探开发,油气关系已发生变化。为进一步加强对该区中浅层的认识,通过对岩屑、气测、定量荧光等录井参数响应特征的综合分析,归纳总结了港东、港西地区不同层位、不同性质储集层的分布规律。认为该区中浅层赋存的油水关系复杂,区域性规律不明显,各断块和各层组的油水层参数界限具有明显的差异性,气测、地化、定量荧光等录井资料可以作为该区解释评价的依据。建议根据港东、港西地区不同层位建立相应的判别标准。

The shallow-middle zones in Qikou sag in Dagang Oilfield takes Minghuazhen and Guantao Groups of Gangdong area and Guantao Group of Gangxi area as the main target zones.For more than 40 years' exploration and development,the relationship between oil and gas has changed.In order to further enhance the recognition for the shallow-middle zones of the area,the authors summarized the distribution rule of the different horizons and reservoirs with different properties in Gangdong and Gangxi areas by the synthetic analysis of the corresponding features of mud logging parameters,such as cuttings,gas logging and quantitative fluorescence.The authors considered that the existed oil and gas relationship of the shallow-middle zones was complex,areal law was not clear,and the parameters in oil and water zones of each fault block and zone group had obvious difference.Thus the mud logging data,such as gas logging,geochemical,quantitative fluorescence etc.can be used as the basis for the interpretation and evaluation of the area.It is suggested that the relative discrimination standards should be set up for the different horizons in Gangdong and Gangxi areas.