中文摘要：

常规-非常规油气协同发展引发储集体类型的多样性,品质整体变差,孔隙结构更为复杂,亟需建立相对统一的孔隙结构评价方案,为储层评价与甜点区优选提供技术支持。基于岩石孔隙结构解剖,提出＂孔隙结构四分法＂评价方案,将孔隙系统分为毫米孔（大于1mm）、微米孔（1～1 000μm）、亚微米孔（100～1 000nm）及纳米孔（小于100nm）;明确了不同类型孔隙系统发育位置、流体作用力及流动机理,建立了对应的分析评价技术。解剖了克拉2气田巴什基齐克组常规砂岩、新安边油田长7段致密砂岩、川中大安寨段介壳灰岩、川南龙马溪组页岩4类储层,明确了各储层类型孔隙结构的差异性及不同级别孔隙所占比例,探讨了孔隙结构对储层物性、资源经济性及开发工艺的影响;孔隙结构分级研究需与储层有效性评价紧密结合,特征尺度决定流体相态与作用力,影响流体可动性及油气开发工艺。进一步加强孔隙分级评价关键界限值的研究,完善孔隙结构表征技术的融合,建立孔隙结构与岩性和产能的定量关系是未来研究的重点。

英文摘要：

The co-development of conventional-unconventional petroleum accumulation initiates the diversity of reservoirs（from high porosity permeability reservoirs to low porosity permeability reservoirs）,weakening quality,and thus results in more complex pore structures.It is therefore urgent to establish a uniform classification scheme of porosity structure for both conventional and unconventional reservoirs so as to provide reference for the reservoir evaluation and sweet-spotting.The pore system classification scheme is proposed based on the comprehensive study of porosity structure and pore sizes,including millimeter-pore（1mm）,micrometer-pore（1-1 000μm）,sub-micrometer-pore（100-1 000nm）and nanometer-pore（100nm）.The occurrence,acting force,flow mechanism and corresponding technologies of different pores are investigated.Four typical reservoir rocks,including conventional sandstone from Kela 2gas field,tight sandstone of Chang 7Member from Xin′anbian oil field,shelly limestone of Daanzhai Member and marine shale of Longmaxi Formation from Sichuan Basin,are taken as examples to investigate the differences of different rocks and the percentage of different pores.Moreover,the effects of pore sizes on physical property,resource economic and development technologies are discussed.Classification of pore sizes should be combined with reservoir effectiveness evaluation.It is the pore size that has great influence on fluid phase and force,which could further affect fluid mobility and exploitation technologies.The keynote of the further research should be focused on key threshold value of pore size classification,combination of pore structure characterization and relationship between pore structure and lithology production.