鄂尔多斯盆地南部奥陶系古岩溶发育控制因素及展布
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摘要
鄂尔多斯盆地南部奥陶系碳酸盐岩经历了多期次、多类型古岩溶作用和改造,古岩溶的发育主要受古构造背景、岩性组合特征以及古地质、古地貌形态的共同控制,尤以古地质和古地貌的控制作用最为重要。在"野外填图法"、"印模法"与"残厚法"研究的基础上,充分应用了地震相追踪和地震解释的成果,对鄂尔多斯盆地南部的古地质和古地貌形态进行了详细的刻画,由南向北依次分布岩溶高地、岩溶台地、侵蚀坡地,并在侵蚀坡地广泛发育侵蚀浅槽、侵蚀坑和溶丘、溶梁等次一级地貌形态。各类古岩溶因形成背景和古水文条件不同,其有利发育区的分布存在着明显差异。
The Ordovician carbonate suffers from multi-stage and multi-type paleo-karst in south of Ordos basin.The development of paleo-karst is controlled by ancient tectonic setting,lithologic association characteristics,and especially ancient geology and landform.On the basis of field mapping method,impression method,residual thickness method,and according to the result of seismic facies trace and seismic interpretation,the paper depicts ancient geology and ancient landform in detail in south of Ordos basin.From south to north,ancient landform is divided into karst highland,karst platform and eroded slope.The eroded slope is furthermore divided into the erosion shallow grooves,erosion pits,karst hills and karst beams.Due to the different paleo-karst background and paleohydrologic conditions,the distribution of favorable areas is obviously different.
The Ordovician carbonate suffers from multi-stage and multi-type paleo-karst in south of Ordos basin.The development of paleo-karst is controlled by ancient tectonic setting,lithologic association characteristics,and especially ancient geology and landform.On the basis of field mapping method,impression method,residual thickness method,and according to the result of seismic facies trace and seismic interpretation,the paper depicts ancient geology and ancient landform in detail in south of Ordos basin.From south to north,ancient landform is divided into karst highland,karst platform and eroded slope.The eroded slope is furthermore divided into the erosion shallow grooves,erosion pits,karst hills and karst beams.Due to the different paleo-karst background and paleohydrologic conditions,the distribution of favorable areas is obviously different.
引文
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[2]Li Qinglin,Li Wenshan,Zhang Xiaopu,et al.Some character-istics of terrestrial heat distribution in Ordos and its sur-rounding[J].Journal of Northwest Seismology,1996,(2):202-206.[李清林,粟文山,张晓普,等.鄂尔多斯及其周缘地热分布的某些特征[J].西北地震学报,1996,(2):202-206.]
[3]Ren Zhanli.History of thermal evolvement and its relation-ship with oil and gas in Ordos basin[J].Acta Petrolei Sinica,1995,17(1):17-24.[任战利.鄂尔多斯盆地热演化史与油气关系的研究[J].石油学报,1995,17(1):17-24.]
[5]Bai Wenhua,Lv Ximin,Li Xiaojun,et al.Karstification modeland fine characterization of paleotopography of paleo-karstbasin:A case study of Ordovician weathering crust in easternOrdos basin[J].Modern Geology,2002,16(3):292-298.[拜文华,吕锡敏,李小军,等.古岩溶盆地岩溶作用模式及古地貌精细刻画——以鄂尔多斯盆地东部奥陶系风化壳为例[J].现代地质,2002,16(3):292-298.]
[6]Rieke H H,Chilingarina G V.Compaction of ArgillaceousSediments[M].Translated by Xu Huaida.Beijing:GeologicalPublishing House,1984.[Rieke H H,Chilingarina G V.泥质沉积物的压实[M].徐怀大,译.北京:地质出版社,1984.]
[7]Li Zhenhong,Zheng Congbin.Impact of paleokarst evolutionon oil and gas reservoir space:A case study of the Ordovicianin Ordos basin[J].Natural Gas Geoscience,2004,15(3):247-252.[李振宏,郑聪斌.古岩溶演化对油气储集空间的影响———以鄂尔多斯盆地奥陶系为例[J].天然气地球科学,2004,15(3):247-252.]
[8]Xia Riyuan,Tang Jiansheng,Guan Bizhu,et al.Paleokarstlandforms and law of natural gas accumulation in Ordovicianof Ordos basin[J].Oil and Gas Geology,1999,20(2):133-136.[夏日元,唐建生,关壁珠,等.鄂尔多斯盆地奥陶系古岩溶地貌及天然气富集规律[J].石油与天然气地质,1999,20(2):133-136.]
[9]Zheng Congbin,Ji Xiaolin,Jia Shuyuan.Features of paleo-karst development in Ordovician weathering crust of centralOrdos basin[J].China Karst,1995,14(3):280-288.[郑聪斌,冀小林,贾疏源.陕甘宁盆地中部奥陶系风化壳古岩溶发育特征[J].中国岩溶,1995,14(3):280-288.]
[10]Zheng Congbin,Wang Feiyan,Jia Shuyuan.Karst rock andkarst facies mode of Ordovician weathering crust of centralOrdos basin[J].China Karst,1997,16(4):351-361.[郑聪斌,王飞雁,贾疏源.陕甘宁盆地中部奥陶系风化壳岩溶岩及岩溶相模式[J].中国岩溶,1997,16(4):351-361.]
[11]Wang Xin,Li Zhenhong,Zheng Congbin.Ordovician reservoirevolution and hydrocarbon migration and accumulation in Or-dos basin[J].Natural Gas Geoscience,2006,17(1):114-118.[王欣,李振宏,郑聪斌.鄂尔多斯盆地奥陶系储层演化与油气运聚[J].天然气地球科学,2006,17(1):114-118.]
[12]Zhang Guisong,Zheng Congbin.Pressure-released water karstand gas migration and accumulation[J].China Karst,2000,19(3):199-205.[章贵松,郑聪斌.压释水岩溶与天然气的运聚成藏[J].中国岩溶,2000,19(3):199-205.]
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