Paleo-karst and Distribution of Oil and Gas of Lower Ordovician in Akekule Area, Tarim Basin

CHEN Qiang lu; WANG Shu yi; QIAN Yi xiong; MA Hong qiang

The thick carbonate was deposited on the foreland of western Kunrin mountain in northwest margin of Tarim basin in Yigeziya Formation of the upper Cretaceous. The distribution of carbonate is from Kashi in the west to Keliyang of Yecheng county in the east. The bioclast limestone is one of the most important lithofacies of eight lithofacies. Oosparite and bioclast sparite are the main compositions of carbonate. The main sedimentary facies are carbonate plateform edge,open carbonate platform and limited carbonate platform. From the west to the east,the evolution of sedimentary environment is from carbonate plateform edge,open carbonate platform to limited car-bonate platform. From the west to the east, the thickness of Yigeziya Formation changes from 125 meters to 20 me-ters. Seven meter scale sychles were recognized in thick carbonate deposition. They are new sequence of oil and gas survey in Cretaceous in Tarim basin. The rich fossils of oyster mactra and spiral shell, carbonate plateform and reef shore show that the north-western Tarim basin was sea with the mouth open to the northwest,and the palaeocli-mate was warm, the palaeosalinity was salt to semisalt. The palaeosea graphic shape was long narrow band from Tajike in the west to Keliyang of Yecheng county in the east.

1 The Faculty of Earth Resources,China University of Geosciences,Wuhan 430074;

2 Wuxi Research Institute of Experimental Geology, SINOPEC, Wuxi Jiangsu 214151

Received Date: 2001-05-14

Rev Recd Date: 2002-06-18

Key words:

Abstract: The thick carbonate was deposited on the foreland of western Kunrin mountain in northwest margin of Tarim basin in Yigeziya Formation of the upper Cretaceous. The distribution of carbonate is from Kashi in the west to Keliyang of Yecheng county in the east. The bioclast limestone is one of the most important lithofacies of eight lithofacies. Oosparite and bioclast sparite are the main compositions of carbonate. The main sedimentary facies are carbonate plateform edge,open carbonate platform and limited carbonate platform. From the west to the east,the evolution of sedimentary environment is from carbonate plateform edge,open carbonate platform to limited car-bonate platform. From the west to the east, the thickness of Yigeziya Formation changes from 125 meters to 20 me-ters. Seven meter scale sychles were recognized in thick carbonate deposition. They are new sequence of oil and gas survey in Cretaceous in Tarim basin. The rich fossils of oyster mactra and spiral shell, carbonate plateform and reef shore show that the north-western Tarim basin was sea with the mouth open to the northwest,and the palaeocli-mate was warm, the palaeosalinity was salt to semisalt. The palaeosea graphic shape was long narrow band from Tajike in the west to Keliyang of Yecheng county in the east.

HTML

Reference (8)

[1]	马永生.中国海相碳酸盐岩油气资源、勘探重大科技问题及对策[J]. 海相油气地质,2000,5(1～2):15[Ma Yongsheng. The Important Quesions and Reply of Marine Rock Oil Resource and Exploration of China[J]. Marine Origin Petroleum Geology,2000,5(1～2):15]
[2]	成都地质学院沉积地质矿产研究所,长庆石油勘探开发研究院译. 古岩溶与油气储层[M]. 成都: 成都科技大学出版社,1991[Palaeokas and Oil Reservoir Translated by Chendu Geological College Sedimentation Research Institute of Sedimentology, Changqing Research Institute of Petroleum Exporation and Production[M]. Chengdu:Press of Chengdu University of Science and Technology,1991]
[3]	何发岐,朱起煌,韩振华等编译. 裂缝碳酸盐岩勘探开发和盐下地震成像技术[J]. 石油物探译丛, 2000, 增刊: 3～34[He Faqi, Zhu qihuang, Hang Zhenhua, et al. Fracturing-Carbonate Rock Exploration and Development and Salt Photographic Imagery Technique[J]. Geophysical Porspecting for Petroleum Translation,2000, (Supp):3～34]
[4]	叶德胜,王恕一,张希明等.新疆塔里木盆地北部储层沉积、成岩特征及储层评价[M]. 成都: 成都科技大学出版社,1995.70～77[Ye Desheng, Wang Shuyi, Zhang Ximing, et al. Sedimentation and Diagenetic Characteristics and Reservoir Evaluation in Northern Tarim Basin, Xinjiang[M]. Chengdu: Press of Chengdu University of Science and Technology, 1995.70～77]
[5]	陈洪德,张锦泉,叶德胜等. 新疆塔里木盆地北部古岩溶储集体特征及控油作用[M].成都: 成都科技大学出版社,1994[Chen Hongde, Zhang Jingquan, Ye Desheng, et al. Palaeokarst Reservoir Characteristics and Controlled Oil in Nothern Tarim Basin, Xinjiang[M]. Chengdu: Press of Chengdu University of Science and Technology, 1994]
[6]	乐昌硕,于炳松,田成等.新疆塔里木盆地北部层序地层及其沉积学研究[M].北京:地质出版社,1996[Yue Changshuo, Yu Bingsong, Tian Cheng, et al. Study of Sequence Stratigraphy and Sedimentology in Northern Tarim Basin,Xinjiang[M]. Beijing:Geological Publishing House,1996 ]
[7]	华东石油学院岩矿教研室编.沉积岩石学[M].北京:石油工业出版社,1985.256～269[Huadong Petroleum College.Sedimentary Rocks[M]. Beijing:Petroleum Industry Press,1985.256～269]
[8]	郭建华. 塔里木盆地轮南地区奥陶系潜山古岩溶及其所控制的储层非均质性[J]. 沉积学报, 1993, 11(1): 56～63[Guo Jianhua. Burial Hill Palaeokarst and Its Controlled Reservoir Heterogeneity in Ordovician, Lunnan Region of Tarim Basin[J]. Acta Sedimentologica Sinica, 1993, 11(1): 56～63]

Paleo-karst and Distribution of Oil and Gas of Lower Ordovician in Akekule Area, Tarim Basin

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related