阿克亚苏三叠系中油组沉积特征及成藏模式
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摘要
塔河油田阿克亚苏地区三叠系中油组砂体分布面积广,沉积厚度大,孔隙度和渗透性好,有利于油气储集,为主力产油层。在地震剖面上识别出差异压实形成的沉积坡折,并结合钻井、岩心和测井等资料,认为在大量物源、坡折带和单河道等因素的控制下,中油组为3级层序内部的低位域湖底扇沉积。随着相对湖平面的下降,在沉积坡折带边缘形成补给水道,物源的不断供应使研究区发育大面积的富砂湖底扇沉积。在内扇的富砂辫状补给水道、中扇辫状沟道和新的上置扇中均见很好的油气显示,但只有侧向封堵性好、砂体厚度大、砂体连通性具有两极性的储集层才有可能成为油气的聚集场所。
In the Triassic of Akeyasu area of Tahe oilfield,mid oil layers contain a deal of sand layers which are large,thick,with good porosity and permeability,which is beneficial for hycrocarbon accumulation, so they are the main oil production layers.We recognized sedimentary slope break by differential compaction through seismic data,then based on drilling,cores and well logging we thought that large supplying,slope break and single channel system were main factors of basin fan development inside the three-order sequence framework.During relative lake-level falling stage,supplying channels system erased low formation on the margin of sedimentary slope break and transported large supplying to the slope out of break.Then sand-rich basin fan formed and developed.Oil and gas showed in the sand of supplying channels,braided stream and new suprafan lobe,but only the reservoir with good lateral sealing,great sand thickness and sand connectivity which other side is connected and another side is sealed could become the oil and gas accumulating places.
In the Triassic of Akeyasu area of Tahe oilfield,mid oil layers contain a deal of sand layers which are large,thick,with good porosity and permeability,which is beneficial for hycrocarbon accumulation, so they are the main oil production layers.We recognized sedimentary slope break by differential compaction through seismic data,then based on drilling,cores and well logging we thought that large supplying,slope break and single channel system were main factors of basin fan development inside the three-order sequence framework.During relative lake-level falling stage,supplying channels system erased low formation on the margin of sedimentary slope break and transported large supplying to the slope out of break.Then sand-rich basin fan formed and developed.Oil and gas showed in the sand of supplying channels,braided stream and new suprafan lobe,but only the reservoir with good lateral sealing,great sand thickness and sand connectivity which other side is connected and another side is sealed could become the oil and gas accumulating places.
引文
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[11]李林,陈志宏,张金凤,等.层序地层分析技术在冲积扇沉积相研究中的应用[J].石油物探,2010,49(3): 299-305
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[16]李坤,赵锡奎,张小兵,等.塔里木盆地阿克库勒凸起油气输导体系类型与演化[J].地质科学,2007,42 (4):766-778
[17]吕双兵,高先志,何万军,等.阿克库勒凸起输导体系对油气分布的控制效应[J].西南石油大学学报, 2007,29(4):49-52
[18]顾忆.塔里木盆地北部塔河油田油气藏成藏机制[J].石油实验地质,2000,22(4):307-312
[2]郭建华,石媛媛,刘辰生,等.塔里木盆地阿克库勒凸起西缘东河砂岩储集物性非均质性研究[J].沉积学报,2005,23(3):406-411
[3]丁勇,邱芳强,高玄彧.塔河油田三叠系油气藏特征及成藏规律[J].中国西部油气地质,2006,2(3): 257-260
[4]刘辰生,郭建华,朱锐,等.塔里木盆地阿克库勒地区三叠系中油组沉积相研究[J].西安石油大学学报(自然科学版),2007,22(6):36-39
[5]王咸彬.塔河南探区三叠系中油组储层预测[J].石??油物探,2008,47(3):244-250
[6]周玉琦,黎玉战,侯鸿斌.塔里木盆地塔河油田的勘探实践与认识[J].石油实验地质,2001,23(4): 363-367
[7]贾庆素,周庆凡.塔北地区含油气系统[J].石油与天然气地质,2002,23(1):103-106
[8]张希明,王恕一.塔里木盆地北部三叠系辫状三角洲砂体储层非均质性研究[J].石油实验地质,1997,19 (3):201-207
[9]蒲仁海,何发歧,袁丽珍,等.阿克库勒凸起南部辫状河三角洲砂体尖灭圈闭预测[J].石油与天然气地质,1999,20(3):224-227
[10]王满,薛林福,邱玉超,等.等时地层格架下的测井属性分析[J].石油物探,2009,48(6):625-628
[11]李林,陈志宏,张金凤,等.层序地层分析技术在冲积扇沉积相研究中的应用[J].石油物探,2010,49(3): 299-305
[12]丁峰,年永吉,王治国,等.地震多属性RGBA颜色融合技术的应用研究[J].石油物探,2010,49(3): 248-252
[13]Walker R G.Deep water sandstone faces and ancient submarine fans:models for exploration for stratigraphic traps[J].AAPG Bulletin,1978,62(6 ): 932-966
[14]Kolla W,Perlmutter M A.Timing of turbidite sedimentation on the Mississippi Fan[J].AAPG Bulletin, 1993,77(7):1129-1140
[15]张家震,徐备,隋风贵,等.陆相断陷盆地缓坡带油气成藏组合模式[J].大庆石油地质与开发,2009,28 (1):15-18
[16]李坤,赵锡奎,张小兵,等.塔里木盆地阿克库勒凸起油气输导体系类型与演化[J].地质科学,2007,42 (4):766-778
[17]吕双兵,高先志,何万军,等.阿克库勒凸起输导体系对油气分布的控制效应[J].西南石油大学学报, 2007,29(4):49-52
[18]顾忆.塔里木盆地北部塔河油田油气藏成藏机制[J].石油实验地质,2000,22(4):307-312
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