黄河口凹陷西北部滑塌浊积扇沉积特征
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摘要
通过研究渤海湾盆地黄河口凹陷沙河街组沙三下亚段岩芯岩性、沉积结构、构造特征以及测井曲线特征和地震反射特征,认为研究区含油砂岩体为半深湖—深湖环境形成的滑塌浊积扇,可分为内扇、中扇和外扇3个亚相。内扇主要由滑塌堆积和碎屑流沉积组成,中扇主要由碎屑流和浊流沉积组成,外扇主要由浊流沉积组成。结合区域地质背景,探讨了滑塌浊积扇的形成机理和主控因素。浊积扇砂岩体往往被形成于深湖—半深湖相还原环境的深灰色、灰黑色泥岩包围,易形成岩性圈闭,有利于油气的运移和聚集成藏,是断陷湖盆陡坡带油气勘探的重要目标。
By studying the lithology,sedimentary texture,structural attitude,logging curve features and seismicreflectance signature in Member 3 of Shahejie Formation in Huanghekou Sag,Bohai Bay Basin,we found thatthe oil-bearing sand bodies in the study area belong to slump turbidite fan deposition formed the under semideeplake and deep lake environment. Slump turbidite fan facies include inner fan,middle fan and outer fan subfacies.The inner fan is mainly composed of slumping sediments and debris flow. The middle fan is dominated by debrisflow and turbidity flow sediments. The outer fan is mainly composed of turbidity flow sediments. Based on theregional geology background,the formation mechanism and the main controlling factors of the slump turbidite fanare discussed in the paper. This kind of fan is usually surrounded by dark grey and dark mudstones formed underreduction environment of the deep lake and semideep lake,and they are more easily to form the lithologic trap. Sothe slump turbidite fan is advantageous for oil-gas migration and accumulation and is also important target of oil andgas exploration in the steep slope belt of the faulted lake basin.
By studying the lithology,sedimentary texture,structural attitude,logging curve features and seismicreflectance signature in Member 3 of Shahejie Formation in Huanghekou Sag,Bohai Bay Basin,we found thatthe oil-bearing sand bodies in the study area belong to slump turbidite fan deposition formed the under semideeplake and deep lake environment. Slump turbidite fan facies include inner fan,middle fan and outer fan subfacies.The inner fan is mainly composed of slumping sediments and debris flow. The middle fan is dominated by debrisflow and turbidity flow sediments. The outer fan is mainly composed of turbidity flow sediments. Based on theregional geology background,the formation mechanism and the main controlling factors of the slump turbidite fanare discussed in the paper. This kind of fan is usually surrounded by dark grey and dark mudstones formed underreduction environment of the deep lake and semideep lake,and they are more easily to form the lithologic trap. Sothe slump turbidite fan is advantageous for oil-gas migration and accumulation and is also important target of oil andgas exploration in the steep slope belt of the faulted lake basin.
引文
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[21]邓宏文,郭建宇,王瑞菊,等.陆相断陷盆地的构造层序地层分析[J].地学前缘,2008,15(2):1–7
[22]张雷,刘招君,杨婷,等.孙吴—嘉荫盆地淘淇河组湖底扇沉积特征[J].西南石油大学学报:自然科学版,2009,31(3):57–61.
[2]Close D I.Slope and fan deposition in deep-waterturbidite systems,East Antarctica[J].Marine Geology,2010,274(1–4):21–31.
[3]王建功,王天琦,张顺,等.松辽坳陷盆地水侵期湖底扇沉积特征及地球物理响应[J].石油学报,2009,30(3):361–366.
[4]张鹏,罗霞,苏朝光,等.车西地区湖底扇沉积特征及储集物性[J].断块油气田,2009,16(5):17–19.
[5]王亚青,林承焰,董春梅,等.东营凹陷史115浊积扇油藏储层非均质性的时空演变规律及主要控制要素研究[J].西安石油大学学报:自然科学版,2008,23(2):16–19,23.
[6]范振峰.车西洼陷北带湖底扇成因机制及其勘探意义[J].新疆石油地质,2007,28(1):48–50.
[7]龙武,王伟锋,程俊生,等.欢喜岭南部沙三段浊积扇沉积特征研究[J].新疆石油天然气,2008,4(1):39–42.
[8]郑荣才,文华国,韩永林,等.鄂尔多斯盆地白豹地区长6油层组湖底滑塌浊积扇沉积特征及其研究意义[J].成都理工大学学报:自然科学版,2006,33(6):566–575.
[9]宋宁,林春明,于正军,等.东营凹陷坨71块近源浊积扇沉积特征[J].西安石油大学学报:自然科学版,2005,20(4):39–42.
[10]吴小红,吕修祥,加东辉,等.辽中凹陷东营组重力流发育机制及沉积构成[J].西南石油大学学报:自然科学版,2009,31(4):18–23.
[11]加东辉,周心怀,李建平,等.辽中凹陷中北段重力流发育模式与控制因素[J].成都理工大学学报:自然科学版,2010,37(1):69–74.
[12]于兴河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2002.
[13]李建平,辛仁臣,向淑敏,等.渤海湾盆地黄河口凹陷古近系东营组三段沉积特征[J].古地理学报,2008,10(4):363–370.
[14]蔡东升,罗毓晖,武文来,等.渤海浅层构造变形特征﹑成因机理与渤中坳陷及其周围油气富集的关系[J].中国海上油气,2001,15(1):35–43.
[15]Dasgupta P.Architecture and facies pattern of a sublacus-trine fan,Jharia Basin,India[J].Sedimentary Geology,2002,148(3–4):373–387.
[16]王颖,王晓州,王英民.大型坳陷湖盆坡折带背景下的重力流沉积模式[J].沉积学报,2009,27(6):1076–1083.
[17]徐显生,王建新,杨婷.贝尔凹陷南屯组湖底扇特征及有利储集相带[J].新疆石油地质,2010,31(4):361–364.
[18]赵澄林,朱筱敏.沉积岩石学[M].第3版.北京:石油工业出版社,2001.
[19]赵国连,赵澄林.渤中凹陷地震–沉积相研究[J].成都理工学院学报,2002,29(1):41–48
[20]梁富康,于兴河,慕小水,等.东濮凹陷南部沙三中段构造调节带对沉积体系的控制作用[J].现代地质,2011,25(1):55–61.
[21]邓宏文,郭建宇,王瑞菊,等.陆相断陷盆地的构造层序地层分析[J].地学前缘,2008,15(2):1–7
[22]张雷,刘招君,杨婷,等.孙吴—嘉荫盆地淘淇河组湖底扇沉积特征[J].西南石油大学学报:自然科学版,2009,31(3):57–61.
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