古地貌恢复在风化壳岩溶型储层研究中的应用——以川中—川南过渡带奥陶系为例
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摘要
川中—川南过渡带奥陶系顶面曾经遭受超过100 Ma的风化剥蚀,形成古风化壳储层的可能性很大。由于它埋藏深、探井少,且缺乏三维地震资料,给储层预测工作带来很大难度。通过地震构造解释,区域构造背景分析,研究了奥陶系可溶蚀地层及可溶蚀区域分布范围,以上奥陶统底面和下二叠统底面沿奥陶系剥蚀尖灭线拼合的等时面及下二叠统顶面为基准,采用印模法恢复出古地貌形态,划分了岩溶高地、岩溶斜坡和岩溶谷地,为下一步的储层预测工作提供出有利目标区域。
After more than 100 million years'weathering and denudation,it is greatly possible to form into palaeoweathering crust-type karst reservoir in Ordovician strata of the Middle to South Sichuan transition zone.Because it is buried deeply with few exploration wells and lacking of 3-D seismic data,it is very hard to predict the reservoir.Seismic struction interpretation,area structure setting analysis and soluble formation distribution studies are finished firstly,and then the isochron surface of the upper Ordovician subface spliced with the Lower Permian basal pinacoid along the Ordovician wedge out and the apex face of Lower Permian are selected to resume the ancient geomorphy with Moulage method.And then the karst highland,dip and uvala are set out to provide the favorable area for further reservoir prediction study.
After more than 100 million years'weathering and denudation,it is greatly possible to form into palaeoweathering crust-type karst reservoir in Ordovician strata of the Middle to South Sichuan transition zone.Because it is buried deeply with few exploration wells and lacking of 3-D seismic data,it is very hard to predict the reservoir.Seismic struction interpretation,area structure setting analysis and soluble formation distribution studies are finished firstly,and then the isochron surface of the upper Ordovician subface spliced with the Lower Permian basal pinacoid along the Ordovician wedge out and the apex face of Lower Permian are selected to resume the ancient geomorphy with Moulage method.And then the karst highland,dip and uvala are set out to provide the favorable area for further reservoir prediction study.
引文
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[12]宋国奇.应用层序地层学方法恢复加里东期古地貌[J].石油实验地质,2000,22(4):350-355.SONGGuo-qi.The recovery of Caledonian paleo-geomorphology withsequence stratigraphy method[J].Petroleum Geology Experiment,2000,22(4):350-355.
[13]肖玉茹.新疆塔里木盆地塔河油田奥陶系古洞穴型碳酸盐岩储层特征及其受控因素[J].现代地质,2003,17(1):92-99.XIAO Yu-ru.The characteristics of paleocave carbonate reservoir andits control factors in the Ordovician stratum of the Tahe oilfield in theTarim Basin,Xinjiang[J].Geoscience,2003,17(1):92-99.
[14]夏日元.鄂尔多斯盆地奥陶系古岩溶地貌及天然气富集特征[J].石油与天然气地质,1999,20(2):133-137.XIARi-yuan.The paleokarst geomorphology and enrichment character-istics of natural gas in the Ordovician stratum in the Ordos Basin[J].Oil&Gas Geology,1999,20(2):133-137.
[2]赵锡奎.乐山—龙女寺隆起区下古生界油气勘探的有利地区和条件[J].石油实验地质,1989,11(4):365-372.ZHAO Xi-kui.The favorite zones and conditions to oil and gas explora-tion for the lower Paleozoic formation of the Leshan-Longnusi Uplift area[J].Petroleum Geology Experiment,1989,11(4):365-372.
[3]洪庆玉.乐山—龙女寺古隆起形成及其剥蚀与沉积状态研究[J].西南石油学院学报,1993,15(4):1-9.HONG Qing-yu.Study to the erosion and deposition situation and theformation of Leshan-Longnusi Palaeo-uplift[J].Journal of South-west Petroleum Institute,1993,15(4):1-9.
[4]许效松.碳酸盐岩地区古风化壳岩溶储层[J].沉积及特提斯地质,2005,25(3):1-7.XUXiao-song.The karst reservoir of the paleo-weathered crust in thecarbonate region[J].Sedimentary Geology and Tethyan Geology,2005,25(3):1-7.
[5]兰光志.碳酸盐岩古岩溶储层模式及其特征[J].天然气工业,1996,16(6):13-19.LANGuang-zhi.The paleokarst reservoir model and its characteristics ofthe carbonate rocks.[J].Natural Gas Industry,1996,16(6):13-19.
[6]贾振远,蔡忠贤.碳酸盐岩古风化壳储集层(体)研究[J].地质科技情报,2004,23(4):94-104.JIA Zhen-yuan,CAI Zhong-xian.The study on the reservoir formations(bodies)of the paleo-weathered crust of the carbonate rocks[J].Geo-logical Science and Technology Information,2004,23(4):94-104.
[7]贾振远,蔡忠贤,肖玉茹.古风化壳是碳酸盐岩一个重要的储集层(体)[J].地球科学,1995,20(3):283-289.JIA Zhen-yuan,CAI Zhong-xian,XIAO Yu-ru.The paleo-weatheredcrust is one of the important reservoir formations(bodies)of the car-bonate rocks[J].Earth Science,1995,20(3):283-289.
[8]楼雄英.T72界面与塔中隆起上奥陶统碳酸盐岩古岩溶储层[J].沉积及特提斯地质,2005,25(3):24-33.LOUXiong-ying.The relation between T27interface and the paleokarstreservoir of the upper Ordovician carbonate rocks in the mid-Tarimuplift[J].Sedimentary Geology and Tethyan Geology,2005,25(3):24-33.
[9]姜平.大港地区千米桥潜山奥陶系古岩溶研究[J].成都理工大学学报(自然科学版),2005,32(1):50-55.JIANG Ping.The study on the ordovician paleokarst in Qianmiqiao bur-ied-hill of Dagang Area[J].Journal of Chengdu University of Tech-nology(Science&Technology Edition),2005,32(1):50-55.
[10]陈学时.中国油气田古岩溶与油气储层[J].沉积学报,2004,22(2):244-254.CHEN Xu-shi.The paleokarst and reservoirs of Chinese oil and gasfields[J].Acta Sedimentologica Sinica,2004,22(2):244-254.
[11]王良俊.塔河油田奥陶系岩溶地貌形成机制[J].新疆石油地质,2001,22(6):480-484.WANG Liang-jun.The study on formation mechanism of the Ordovi-cian paleokarst landform in Tahe Oilfield[J].Xinjiang PetroleumGeology,2001,22(6):480-484.
[12]宋国奇.应用层序地层学方法恢复加里东期古地貌[J].石油实验地质,2000,22(4):350-355.SONGGuo-qi.The recovery of Caledonian paleo-geomorphology withsequence stratigraphy method[J].Petroleum Geology Experiment,2000,22(4):350-355.
[13]肖玉茹.新疆塔里木盆地塔河油田奥陶系古洞穴型碳酸盐岩储层特征及其受控因素[J].现代地质,2003,17(1):92-99.XIAO Yu-ru.The characteristics of paleocave carbonate reservoir andits control factors in the Ordovician stratum of the Tahe oilfield in theTarim Basin,Xinjiang[J].Geoscience,2003,17(1):92-99.
[14]夏日元.鄂尔多斯盆地奥陶系古岩溶地貌及天然气富集特征[J].石油与天然气地质,1999,20(2):133-137.XIARi-yuan.The paleokarst geomorphology and enrichment character-istics of natural gas in the Ordovician stratum in the Ordos Basin[J].Oil&Gas Geology,1999,20(2):133-137.
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