宋芳屯凹坡带葡萄花油层油气成藏模式及有利区块预测
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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。
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.
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。
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.
引文
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[3]胡见义,赵文智,窦立荣.中国含油气盆地与石油地质理论进展[J].断块油气田,1996,3(2):1～7.
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[5]曾允孚,覃建雄.沉积学发展现状与前瞻[J].成都理工学院学报,1999,26(1):1～7.
[6]徐强,刘宝,朱同兴,等.中国沉积学研究的现状和发展方向[J].西南石油学院学报,2000,22(3):1～4.
[7]蔡希源,李思田等.陆相盆地高精度层序地层学—隐蔽油气藏勘探基础、方法与实践[M].北京:地质出版社,2003.
[8]随军,吕晓光,赵翰卿,许运新著.大庆油田河流—三角洲相储层研究.北京:石油工业出版社,2000:1～51.
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[10]Hunt,J.M..Generation and migration of petroleum from abnormally pressured fluid compartments[J].AAPG Bulletin,1990,74(1):1～12.
[11]范立国,侯启军,陈均亮,等.松辽盆地中浅层构造层序界面的划分及其对含油气系统形成的意义[J].大庆石油学院学报,2003,27(2):13～16.
[12]张莉,岳乐平,杨亚娟,等.反转构造盆地裂缝特征[J].石油与天然气地质,2002,23(4):361～363.
[13]曲福生.松辽盆地石油和天然气勘查史[M].北京:地质出版社,1992.
[14]漆家福,杨桥,王子煜.编制盆地复原古构造图的若干问题的讨论[J].地质科学,2003,38(3):413～424.
[15]焦养泉,李珍,周海民.沉积盆地物质来源综合研究—以南堡老第三纪亚断陷盆地为例[J].岩相古地理,1998,18(5):16～20.
[16]侯贵廷,冯大晨,王文明,等.松辽盆地的反转构造作用及其对油气成藏的影响[J].石油与天然气地质,2004,25(1):49～53.
[17]马安来,张水昌,张大江,等.油气成藏期研究新进展[J].石油与天然气地质,2005,26(3):271～276.
[18]姜振学,庞雄奇,曾溅辉,等.油气优势运移通道的类型及其物理模拟实验研究[J].地学前缘,2005,12(4):507～516.
[19]邓宏文.美国层序地层研究中的新学派—高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89～97.
[20]邓宏文,王红亮,宁 宁.沉积物体积分配原理—高分辨率层序地层学的理论基础[J].地学前缘,2000,7(4):305～313.
[21]赵翰卿,付志国,吕晓光,等.大型河流—三角洲沉积储层精细描述方法[J].石油学报,2000,21(4):109～113.
[22]楼章华,兰翔,卢庆梅,等.地形、气候与湖面波动对浅水三角洲沉积环境的控制作用—以松辽盆地北部东区葡萄花油层为例[J] .地质学报,1999,73(1):83～92.
[22]马世忠,杨清彦.曲流点坝沉积模式、三维构形及其非均质模型.沉积学报,2000,18(2):241～247.
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