【作者】 刘宗堡；

【导师】 马世忠；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2007， 硕士

【摘要】 宋芳屯凹坡带是松辽盆地三肇凹陷发生、发展过程中形成的继承性鼻状构造斜坡,葡萄花油层是研究区上中下部含油组合最重要的含油目的层,长期以来,对葡萄花油层成藏规律认识不清,本论文运用沉积学、层序地层学、石油地质学等学科的理论和方法,对研究区古构造、层序格架、沉积相、成藏期次、油水分布、圈闭类型进行了深入研究,总结出油气成藏模式和富集规律,指出了进一步勘探和开发的方向和目标,对整个三肇凹陷的油气藏成因和预测具有重要的指导意义。本文从三肇凹陷及周边古构造演化入手,对宋芳屯凹坡带古构造演化进行了精细研究,总结出古构造演化的四个阶段,并首次发现宋芳屯-模范屯大型古鼻状构造,认清了古构造对油气成藏的控制作用。在古构造研究的基础上,通过对葡萄花油层地层厚度、葡萄花油层砂岩厚度分析,确定了研究区为北部单一物源,属于松辽盆地北部沉积体系,是长垣萨尔图、杏树岗水系,向太平屯、宋芳屯地区延伸的三角洲平原、三角洲前缘沉积。应用沉积学、层序地层学理论对葡萄花油层进行精细地层划分与对比,建立了高分辨率层序地层格架,认识到研究区南部为同沉积构造抬升的中部缺失;通过重点沉积时间单元沉积微相研究,得出葡萄花油层以分流河道、水下分流河道微相为主,水下分流河道极窄且发育,并延伸较远。通过对徐家围子次凹陷和永乐次凹陷烃源岩埋藏史的研究,得知油气的初次运移期为嫩江组五段末期,油气的成藏关键期为明水组二段末期,并对油气的运移场有了新的认识。在对葡萄花油层构造、砂岩、静态、动态、射孔、报废井及油水界面等方面研究基础上,重点分析了31个典型单一圈闭,总结出宋芳屯凹坡带4种油气成藏模式,并指出单一局部构造主控油因素,在成藏规律的指导下,预测了开发区周边的有利探明区和有利空白区。更多还原

【Abstract】 Songfangtun concave slope area is a succession nose shape structure slope as well as Sanzhao depression of Songliao basin developing process,Putaohua formation is most important contains oil goal formation in this area center lower part to contain oil combines,since long ago,the forming law is not unclear to be recognized,based on the theories and means of sedimentology,sequence stratigraphy,petroleum geology and so on,from the fine research of palaeostructure,sequence frame work sedimentary facies,forming period,hydrocarbon water distribution,trap type,and generalize on hydrocarbon forming pattern and enrichment law,pointed out new objects and orientation of exploration and development,had important instruction significance of hydrocarbon genesis and prediction of Sanzhao depression.This article from Sanzhao depression and the peripheral palaeostructure evolution obtains,had conducted the scrutiny to palaeostructure of Songfangtun concave slope area,summary four stages which palaeostructure evolves,and initial found Songfangtun-Mofantun ancient nose structure,had known the palaeostructure control action to the hydrocarbon migration.In the palaeostructure research foundation,through to bed thickness,sandstone thickness research of Putaohua formation,ascertain this area for the north sole source,belongs to north the depositional system of Songliao basin,is delta plain and delta front which extent from the Changyuan-Shaertu,Xingshugang water system to Taipingtun,Songfangtun.The application sedimentology,high resolution sequence stratigraphy theory carries on the division to Putaohua formation,had established high resolution sequence framework,know middle loss as well as syndeposit uplift in south this research area,And research through sedimentary microfacies of the key sedimentary units,determine this area is primarily in branch channel and submerged branch channel,the submarine branch channel is extremely narrow,growth,and extend long.Through Xujiaweizi subdepression and Yongle subdepression bury history of source rock research,find hydrocarbon primary migration time for K1n4 of last stages,forming essential time for K2m2 of last stages,and had the new understanding to the hydrocarbon migration field.Basedon Putaohua formation structure,sandstone,staticstate,performance,abandoned well and hydrocarbon water interface aspect and so on studies,priority analyzed 31 type trap,summarized four type hydrocarbon forming pattern of Songfangtun concave slope,and pointed out’the sole local structure’ host controlled hydrocarbon factor,in forming law under the instruction,had forecast the development zone peripheral advantageously proved hydrocarbon area and the advantageous clear area.更多还原