【摘要】 目的探究影响长8油藏石油富集的因素,为下一步勘探提供依据。方法通过岩心观察、薄片观察、扫描电镜和粒度分析等对富县探区长8油藏岩性特征、沉积相特征及成岩作用进行研究。结果富县探区长8油层组储层砂体累计厚度较大,粒度细,沉积相变快,储层物性纵、横向具有明显的非均质性。结论影响富县探区石油富集成藏的储集因素包括岩石学组分、沉积相、砂体展布、成岩作用及物性等;沉积相是最主要的因素,三角洲前缘水下分流河道砂体是主要的储集体。富县探区下一步勘探的重点应在水下分流河道砂体带上寻找次生孔隙发育区。更多还原

【Abstract】 Aim To provide a basis for exploration the factors of oil accumulation to explore the Chang 8 oil reservoir.Methods The lithological,sedimentary facies characteristics and diagenesis are studied based on bore core′s and slice′s observing and accounting,and analysis of scanning electron microscope,and grain size analysis.Results It is found that the oil-bearing sand of Chang 8 reservoir in this area is thick bed in ultimate,fine grain,faster change of sedimentary facies,and reservoir physical property has obvious monuniformity from both the vertical and horizontal.Conclusion Further research showed that reservoir factors that affect oil accumulation including petrological component,sedimentary facies,sand body distribution,diagenesis,and physical property,etc,among which sedimentary facies are the most important one.Major reservoir is sand bodies of subaquatic distributary channels in delta fronts.With the above research,it has indicated that the next exploration point still is looking for the reach where secondary porosity is in the sand bodies of subaquatic distributary channels.更多还原