塔里木盆地震旦系—寒武系不整合面特征及油气勘探意义
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摘要
塔里木盆地震旦系—寒武系不整合面在盆地内部及周边露头区广泛发育。通过地震资料追踪及露头地质剖面研究,认为震旦系—寒武系不整合面主要有两种类型:平行不整合和角度不整合。平行不整合主要分布在库鲁克塔格、柯坪露头区及盆地北部坳陷及其以北的广大地区;角度不整合分布在中央隆起带(英东构造带—塔东低凸起—塔中低凸起—巴楚断隆)的北翼附近,自东向西地震剖面结构表现清晰。震旦系白云岩受该期不整合面影响,遭受大气淡水溶蚀作用,形成古岩溶型储层,中央隆起带北翼角度不整合分布区为震旦系白云岩古岩溶型储层的有利勘探部位。
The unconformity between Sinian and Cambrian strata is widespread developed within and around Tarim Basin. Two types of unconformities are presented in the study area based on the seismic and geological outcrop analysis. One type is parallel unconformity which locates in Kuruktag,Kalpin and the northern depression and its north area. The other type is angular unconformity which developes near the north ramp of the Central Rise (Tadong low uplift-Tazhong low uplift-Bachu fault uplift)and can be clearly identified from the east-west trending seismic records. Palaeokarst dolomite reservoirs of Sinian were formed associated with the unconformity between Sinian and Cambrian. Beneficial direction of the Palaeokarst dolomite reservoirs of Sinian in Tarim Basin is north ramp of the central rise where the angular unconformity distributes.
The unconformity between Sinian and Cambrian strata is widespread developed within and around Tarim Basin. Two types of unconformities are presented in the study area based on the seismic and geological outcrop analysis. One type is parallel unconformity which locates in Kuruktag,Kalpin and the northern depression and its north area. The other type is angular unconformity which developes near the north ramp of the Central Rise (Tadong low uplift-Tazhong low uplift-Bachu fault uplift)and can be clearly identified from the east-west trending seismic records. Palaeokarst dolomite reservoirs of Sinian were formed associated with the unconformity between Sinian and Cambrian. Beneficial direction of the Palaeokarst dolomite reservoirs of Sinian in Tarim Basin is north ramp of the central rise where the angular unconformity distributes.
引文
陈景山,李忠,王振宇,谭秀成,李凌,马青.2007． 塔里木盆地奥陶系碳酸盐岩古岩溶作用与储层分布.沉积学报,25(6) :858-868．Chen Jingshan, Li Zhong, Wang Zhenyu, Tan Xiucheng, Li Ling and Ma Qing. 2007． Paleokarstification and reservoir distribution of Ordovician carbonates in Tarim Basin. Acta Sedimentologica Sinica,25(6) :858-868．
高振家,王务严,彭昌文1985． 新疆阿克苏-乌什地区震旦系.乌鲁木齐:新疆人民出版社.1-184． Gao Zhenjia,Wang Wuyan and Peng Changwen. 1985． The Sinian System in Xinjiang.Urumqi:Xinjiang People's Publishing House. 1-184．
何金有,徐备,孟祥英,寇晓威,刘兵,王宇,米合.2007． 新疆库鲁克塔格地区新元古代层序地层学研究及对比.岩石学报,23(7) :1645-1654．He Jinyou,Xu Bei,Meng Xiangying,Kou Xiaowei, Liu Bing, Wang Yu and Mi He. 2007． Neoproterozoic sequence stratigraphy and correlation in Quruqtagh area,Xinjiang. Acta Petrologica Sinica,23(7) :1645-1654．
何秀彬,徐备,袁志云.2007． 新疆柯坪地区新元古代晚期地层碳同位素组成及其对比.科学通报,52(1) :107-113． He Xiubin,Xu Bei and Yuan Zhiyun. 2007． C-isotope composition and correlation of the Upper Neoproterozoic in Keping area,Xinjiang. Chinese Science Bulletin,52(1) :107-113．
贾承造.1997． 中国塔里木盆地构造特征与油气.北京:石油工业出版社.1-448Jia Chengzao. 1997． Tectonic Characteristics and Petrolium Tarim Basin,China. Beijing:Petroleum Industry Press. 1-448．
李曰俊,宋文杰,吴根耀,王艺芬,李宇平,郑多明.2005． 塔里木盆地中部隐伏的晋宁期花岗闪长岩和闪长岩.中国科学(D辑),35(2) :97-104．Li Yuejun,Song Wenjie, Wu Genyao, Wang Yifen, Li Yuping and Zheng Duoming. 2005． Jinning granodiorite and diorite deeply concealed in the central Tarim Basin. Science in China(Series D), 48(12) :2061-2068．
乔秀夫,季强,高林志,章雨旭,高振家.1996． 北中国板块东部震旦系对比.中国区域地质,(2) :135-142． Qiao Xiufu,Ji Qiang, Gao Linzhi,Zhang Yuxu and Gao Zhenjia. 1996． Stratigraphic correlation of the Sinian in the eastern part of the Northern China Plate. Regional Geology of China,(2) :135-142．
孙晓猛,郝福江,程日辉,刘鹏举,王璞,孙庆春.2007． 塔里木盆地东北缘盖层不整合序列及其构造演化.吉林大学学报(地球科学版).37(3) :450-457． Sun Xiaomeng, Hao Fujiang,Cheng Rihui, Liu Pengju, Wang Pu and Sun Qingchun. 2007． Sequence of unconformities and tectonic evolution of the covers at the northeast margin of the Tarim Basin. Journal of Jilin University(Earth Science Edition) ,37(3) :450-457．
余以生.1994． 甘肃的震旦系.甘肃地质学报,(增刊):54-89． Yu Yisheng. 1994． The Sinian system in Gansu Province. Acta Geologica Gansu,(suppl.):54-89．
Christie-Blick N,Dyson I A and Von Der Borch C C. 1995． Sequence stratigraphy and the interpretation of Neoproterozoic earth history. Precambrian Research,73:3-26．
Narbonne G M and Aitken J D. 1995． Neoproterozoic of the Mackenzie Mountains, northwestern Canada. Precambrian Research,73:101-121．
Saylor B Z, Grotzinger J P and Germs G. J B. 1995． Sequence stratigraphy and sedimentology of the Neoproterozoic Kuibis and Schwarzrand subgroups(Nama Group), southwestern Namibia; Neoproterozoic stratigraphy and earth history.Precambrian Research,73:153-171．
Valdiya K S. 1995． Proterozoic sedimentation and Pan-African geodynamic development in the Himalaya. Precambrian Research ,74(1) :35-55．
高振家,王务严,彭昌文1985． 新疆阿克苏-乌什地区震旦系.乌鲁木齐:新疆人民出版社.1-184． Gao Zhenjia,Wang Wuyan and Peng Changwen. 1985． The Sinian System in Xinjiang.Urumqi:Xinjiang People's Publishing House. 1-184．
何金有,徐备,孟祥英,寇晓威,刘兵,王宇,米合.2007． 新疆库鲁克塔格地区新元古代层序地层学研究及对比.岩石学报,23(7) :1645-1654．He Jinyou,Xu Bei,Meng Xiangying,Kou Xiaowei, Liu Bing, Wang Yu and Mi He. 2007． Neoproterozoic sequence stratigraphy and correlation in Quruqtagh area,Xinjiang. Acta Petrologica Sinica,23(7) :1645-1654．
何秀彬,徐备,袁志云.2007． 新疆柯坪地区新元古代晚期地层碳同位素组成及其对比.科学通报,52(1) :107-113． He Xiubin,Xu Bei and Yuan Zhiyun. 2007． C-isotope composition and correlation of the Upper Neoproterozoic in Keping area,Xinjiang. Chinese Science Bulletin,52(1) :107-113．
贾承造.1997． 中国塔里木盆地构造特征与油气.北京:石油工业出版社.1-448Jia Chengzao. 1997． Tectonic Characteristics and Petrolium Tarim Basin,China. Beijing:Petroleum Industry Press. 1-448．
李曰俊,宋文杰,吴根耀,王艺芬,李宇平,郑多明.2005． 塔里木盆地中部隐伏的晋宁期花岗闪长岩和闪长岩.中国科学(D辑),35(2) :97-104．Li Yuejun,Song Wenjie, Wu Genyao, Wang Yifen, Li Yuping and Zheng Duoming. 2005． Jinning granodiorite and diorite deeply concealed in the central Tarim Basin. Science in China(Series D), 48(12) :2061-2068．
乔秀夫,季强,高林志,章雨旭,高振家.1996． 北中国板块东部震旦系对比.中国区域地质,(2) :135-142． Qiao Xiufu,Ji Qiang, Gao Linzhi,Zhang Yuxu and Gao Zhenjia. 1996． Stratigraphic correlation of the Sinian in the eastern part of the Northern China Plate. Regional Geology of China,(2) :135-142．
孙晓猛,郝福江,程日辉,刘鹏举,王璞,孙庆春.2007． 塔里木盆地东北缘盖层不整合序列及其构造演化.吉林大学学报(地球科学版).37(3) :450-457． Sun Xiaomeng, Hao Fujiang,Cheng Rihui, Liu Pengju, Wang Pu and Sun Qingchun. 2007． Sequence of unconformities and tectonic evolution of the covers at the northeast margin of the Tarim Basin. Journal of Jilin University(Earth Science Edition) ,37(3) :450-457．
余以生.1994． 甘肃的震旦系.甘肃地质学报,(增刊):54-89． Yu Yisheng. 1994． The Sinian system in Gansu Province. Acta Geologica Gansu,(suppl.):54-89．
Christie-Blick N,Dyson I A and Von Der Borch C C. 1995． Sequence stratigraphy and the interpretation of Neoproterozoic earth history. Precambrian Research,73:3-26．
Narbonne G M and Aitken J D. 1995． Neoproterozoic of the Mackenzie Mountains, northwestern Canada. Precambrian Research,73:101-121．
Saylor B Z, Grotzinger J P and Germs G. J B. 1995． Sequence stratigraphy and sedimentology of the Neoproterozoic Kuibis and Schwarzrand subgroups(Nama Group), southwestern Namibia; Neoproterozoic stratigraphy and earth history.Precambrian Research,73:153-171．
Valdiya K S. 1995． Proterozoic sedimentation and Pan-African geodynamic development in the Himalaya. Precambrian Research ,74(1) :35-55．
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