Reservoir characteristics of Shahejie Formation in Qingdong Sag, Jiyang Depression
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摘要: 济阳坳陷青东凹陷勘探程度很低,沉积储层等基础地质条件研究显得尤为重要.沙河街组是青东凹陷主要的含油层系.综合岩心、薄片、物性分析等资料,对该区储层特征进行了系统研究.沙河街组储层储集空间以原生粒间孔隙、粒间溶蚀孔和粒内溶孔为主.沙四段主要处于早成岩B期—晚成岩A期,非均质性较强;沙三段主要处于早成岩B期,整体物性表现为高孔、高渗透的特征.沉积微相和成岩作用是研究区储层物性的主要影响因素.溶蚀作用的发生与有机质排烃伴生的有机酸有关,使储层物性得以改善;胶结作用和压实作用使储层孔渗性变差.Abstract: The exploration degree of the Qingdong Sag of the Jiyang Depression is very low,so it is necessary to carry out studies of basic geological conditions such as sedimentary reservoir.The Shahejie Formation is the main oil-bearing sequence in the Qingdong Sag.Based on core,thin section and physical property analyses,the reservoir characteristics in the study area have been systematically researched.Pores in the Shahejie Formation are mainly primary intergranular,intergranular dissolved and intragranular dissolved ones.The 4th member of the Shahejie Formation is from the early diagenesis stage B to the late diagenetic stage A,and has strong heterogeneity.The 3rd member of the Shahejie Formation is during the early diagenesis stage B,and has high porosity and high permeability.Sedimentary microfacies and diagenesis are the main influencing factors for reservoir property in the study area.Corrosion happens when organic acid generates as organic matter expulsing,which improving reservoir property.Cementation and compaction make the reservoir porosity and permeability become worse.
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Key words:
- reservoir space /
- diagenesis /
- physical characteristics /
- Qingdong Sag /
- Jiyang Depression /
- Bohai Bay Basin
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[1] 杨贵丽.济阳坳陷青东凹陷构造格局及构造演化[J].油气地质与采收率,2011,18(1):7-10. [2] 俞家声,王普伟,林玉祥.青东凹陷油气资源潜力[J].油气地质与采收率,2001,8(1):5-8. [3] 郭新安,吴智平,李伟,等.青东地区新生代断层发育特征及其对沉积的控制作用[J].油气地质与采收率,2010,17(4):13-16. [4] 时丕同,方旭庆,陈涛,等.青东凹陷石油地质特征和勘探方向分析[J].西南石油大学学报:自然科学版,2009,31(5):43-48. [5] 纪友亮,李清山,王勇,等.高邮凹陷古近系戴南组扇三角洲沉积体系及其沉积相模式[J].地球科学与环境学报,2012,34(1):9-19. [6] 史原鹏,姚威,降栓奇,等.洪浩尔舒特凹陷下白垩统扇三角洲前缘次生扇的油气地质意义[J].油气地质与采收率,2011,18(4):35-37. [7] 白振瑞,邢凤存,李会宪.柯坪露头区柯坪塔格组河流作用为主的三角洲沉积特征及其油气勘探意义[J].石油与天然气地质,2012,33(2):217-224. [8] 张威,李勇,张自力,等.南华北地区上古生界砂岩成岩作用及影响[J].断块油气田,2011,18(5):578-581. [9] 罗文军,彭军,杜敬安,等.川西坳陷须家河组二段致密砂岩储层成岩作用与孔隙演化:以大邑地区为例[J].石油与天然气地质,2012,33(2):287-295. [10] 罗文军,彭军,曾小英,等.川西丰谷地区须四段钙屑砂岩优质储层形成机理[J].石油实验地质,2012,34(4):412-416,421. [11] 王雅楠,李达,齐银,等.苏里格气田苏14井区盒8段储层成岩作用与孔隙演化[J].断块油气田,2011,18(3):297-300. [12] 王勇,施泽进,刘亚伟,等.鄂西渝东地区石柱复向斜志留系小河坝组致密砂岩成岩作用[J].石油与天然气地质,2011,32(1):75-82. -
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