郭岭, 孙遥, 郭峰,等.胡尖山油田延长组长6段三角洲前缘致密砂岩储层特征及其主控因素[J].河南理工大学学报（自然科学版）,2023,42(4):76-85.

GUO L，SUN Y, GUO F,et al.Characteristics and main controlling factors of tight sandstone reservoir in delta front facies in Chang 6 member of Yanchang Formation，Hujianshan Oilfield[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):76-85.

胡尖山油田延长组长6段三角洲前缘致密砂岩储层特征及其主控因素

郭岭1,2, 孙遥3, 郭峰3, 张翠萍4

1.西北大学 大陆动力学国家重点实验室，陕西 西安  710069；2.西北大学 地质学系，陕西 西安  710069；3.西安石油大学 地球科学与工程学院，陕西 西安  710065；4.长庆油田公司 第六采油厂，陕西 西安  710016

摘要:采用粒度分析、真空浸渍铸体薄片分析、扫描电镜检测、压汞测试、黏土矿物X射线衍射和常规物性分析等方法探究胡尖山油田延长组长6段三角洲前缘致密砂岩储层特征及其主控因素。结果表明：长6段储层致密砂岩主要为岩屑长石砂岩和长石岩屑砂岩，岩石成分成熟度和结构成熟度均较低；主要孔喉组合为残余粒间孔+长石溶孔+晶间孔的小孔‐微细喉道组合，孔隙度和渗透率均值分别为10.70%，0.69×10^-3 μm²；孔渗相关性较好，为低孔特低孔‐特低渗超低渗小孔微细喉道型储层，渗透率主要由数量较少的微孔、中孔贡献，孔隙度主要由数量较多的微米孔贡献；强烈的压实、泥质、碳酸盐胶结作用是长6段储层致密的主要原因；水下分流河道等优势沉积相带和溶蚀作用是储层形成的主控因素。

关键词:三角洲前缘;致密砂岩储层;胡尖山油田;长6段;鄂尔多斯盆地

doi:10.16186/j.cnki.1673-9787.2021040036

基金项目:国家自然科学基金资助项目（41302076）；陕西省自然科学基金资助项目（2014JQ5191）

收稿日期:2021/04/09

修回日期:2021/06/01

出版日期:2023/07/25

Characteristics and main controlling factors of tight sandstone reservoir in delta front facies in Chang 6 member of Yanchang Formation，Hujianshan Oilfield

GUO Ling1,2, SUN Yao3, GUO Feng3, ZHANG Cuiping4

1.State Key Laboratory of Continental Dynamics，Northwest University，Xi’an  710069，Shaanxi，China；2.Department of Geology，Northwest University，Xi’an  710069，Shaanxi，China；3.School of Earth Science and Engineering，Xi’an Shiyou University，Xi’an  710065，Shaanxi，China；4.The Sixth Oil Production Factory，Changqing Oilfield Company，Xi’an  710016，Shaanxi，China

Abstract:The characteristics and main controlling factors of tight sandstone reservoirs of Chang 6 member，Yanchang Formation in Hujianshan Oilfield have been studied by particle size analysis，thin section，scanning electron microscopy detection，mercury intrusion testing，X-ray diffraction，and conventional physical property analysis.The results showed that the tight sandstone of Chang 6 member was mainly detritus feldspar sandstone and feldspar detritus sandstone.The maturity of rock composition and structure was relatively low.The main pore throat assemblage included intergranular pore，feldspar dissolution pore and intercrystalline pore.Average porosity and permeability were 10.70% and 0.69×10^-3 μm² respectively.The tight sandstone of Chang 6 member in Hujianshan Oilfield was an ultra-low porosity，ultra-low permeability reservoir.There was a positive correlation between porosity and permeability.Permeability was mainly contributed by a small number of micropores and mesopores，while porosity was mainly contributed by a large number of micron pores.The mechanism of reservoir densification included compaction and argillaceous，carbonate cementation.The underwater distributary channel facies was the dominant sedimentary facies for the formation of high-quality reservoir.Dissolution was one of the main controlling factors for the formation of the reservoirs.

Key words:delta front;tight sandstone reservoir;Hujianshan Oilfield;Chang 6 member;Ordos Basin

胡尖山油田延长组长6段三角洲前缘致密砂岩储层特征及其主控因素_郭岭.pdf