基于地球物理方法预测二连盆地及邻区晚古生代潜在烃源岩分布
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摘要
二连盆地及邻区是我国油气勘探的重点区域之一,普遍认为烃源岩层主要分布在中生代地层,对其晚古生代地层的烃源岩潜力研究较少,本文对研究区内晚古生代碳酸盐岩及泥岩进行了有机地球化学实验并分析其烃源岩潜力,评价结果表明二连盆地及邻区内晚古生代地层具有一定的生烃潜力,受高成熟度的影响,剩余潜力以生气能力为主.依据研究区内电法剖面、布格重力异常特征及磁性资料认为晚古生代潜在烃源岩层具有"低电阻、高密度、弱磁性"的地球物理性质,并初步预测了二连盆地及邻区晚古生代的深度大致分布在3～5km的范围内,进一步利用优化后的小子域滤波重力异常分离技术对晚古生代地层进行了厚度预测,刻画其平面分布特征,认为研究区内的晚古生代地层具有两个分布中心,其中心区厚度范围为1000～2000m之间,与野外地质剖面的厚度基本一致,晚古生代潜在烃源岩的平面预测可以为二连盆地油气勘探工作提供新方向.
The Erlian Basin is an important area of oil and gas exploration in our country.The known hydrocarbon source rocks are mainly distributed in Mesozoic strata,while the study on Late Paleozoic potential hydrocarbon source rocks remains little.In this paper,the organic geochemistry experiment results show that the carbonate and mudstone layers of the Late Paleozoic in the Erlian Basin and its adjacent areas have a certain hydrocarbon source rocks potential.The residual potential of source rocks is dominated by gas generation due to the high mature.Research of electrical survey,Bouguer gravity anomaly and magnetic data suggests that the Late Paleozoic potential hydrocarbon source rocks in this region are characterized by low resistivity,high density and weak magnetism.Moreover,the depths of these rocks are predicted to range 3～5 km roughly.Using the improved technique of gravity anomaly separation based on sub-region filtering,this work predicts the thickness of the Late Paleozoic source rocks.The results show that two centers of Late Paleozoic strata are presented in Erlian Basin and adjacent areas,of which the thickness ranges 1000～2000 m,largely consistent with geological cross sections in the field.Such distribution prediction of Late Paleozoic potential source rocks can provide a new direction for oil and gas exploration in the Erlian Basin.
The Erlian Basin is an important area of oil and gas exploration in our country.The known hydrocarbon source rocks are mainly distributed in Mesozoic strata,while the study on Late Paleozoic potential hydrocarbon source rocks remains little.In this paper,the organic geochemistry experiment results show that the carbonate and mudstone layers of the Late Paleozoic in the Erlian Basin and its adjacent areas have a certain hydrocarbon source rocks potential.The residual potential of source rocks is dominated by gas generation due to the high mature.Research of electrical survey,Bouguer gravity anomaly and magnetic data suggests that the Late Paleozoic potential hydrocarbon source rocks in this region are characterized by low resistivity,high density and weak magnetism.Moreover,the depths of these rocks are predicted to range 3～5 km roughly.Using the improved technique of gravity anomaly separation based on sub-region filtering,this work predicts the thickness of the Late Paleozoic source rocks.The results show that two centers of Late Paleozoic strata are presented in Erlian Basin and adjacent areas,of which the thickness ranges 1000～2000 m,largely consistent with geological cross sections in the field.Such distribution prediction of Late Paleozoic potential source rocks can provide a new direction for oil and gas exploration in the Erlian Basin.
引文
Chen Y Q,Fan T L,Zhao Z G,et al.2010.Discovery and implications of Sai-51carbonate buried hill reservoir of upper palaeozoic in Erlian Basin.Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute)(in Chinese),32(3):209-213.
Han C Y,Jin F M,Wang J,et al.2011.Exploration prospect of hydrocarbon of Neopaleozoic in Erlian basin,Inner Mongolia,China.Geological Bulletin of China(in Chinese),30(2):243-249.
Huang J Q,Ren J S,Jiang C F,et al.1977.An outline of the tectonic characteristics of China.Acta Geological Sinica(in Chinese),(2):117-135.
Liu D,Zhang W Z,Kong Q F,et al.2016.Lower Paleozoic source rocks and natural gas origins in Ordos Basin,NW China.Petroleum Exploration and Development,43(4):591-601.
Lu S F,Xue H T,Zhong N N.2003.Simulating calculation of the variations of organic matter abundance and hydrocarbongenerating potential during geological processes.Geological Review(in Chinese),49(3):292-297.
Ma G Q,Du X J,Li L L.2013.An optimized small sub-domain filtering method.Oil Geophysical Prospecting(in Chinese),48(4):658-662.
Pepper A S.1991.Estimating the petroleum expulsion behaviour of source rocks:a novel quantitative approach.Geological Society,London,Special Publications,59(1):9-31.
Rao S,Zhu C Q,Wang Q,et al.2013.Thermal evolution patterns of the Sinian-Lower Paleozoic source rocks in the Sichuan basin,southwest China.Chinese Journal of Geophysics(in Chinese),56(5):1549-1559,doi:10.6038/cjg20130513.
Scalan E S,Smith J E.1970.An improved measure of the odd-even predominance in the normal alkanes of sediment extracts and petroleum.Geochimica et Cosmochimica Acta,34(5):611-620.
Song J M,Jin F M,Wang Y Q,et al.2012.Geological implications of gravity and magnetic anomalies in Erlian Basin and understanding of Upper Paleozoic structures.Oil Geophysical Prospecting(in Chinese),47(S1):140-146.
Wang C W,Jin W,Zhang X Z,et al.2008.New understanding of the Late Paleozoic tectonics in northeastern China and adjacent areas.Journal of Stratigraphy(in Chinese),32(2):119-136.
Wang C W,Sun Y W,Li N,et al.2009.Tectonic implications of Late Paleozoic stratigraphic distribution in Northeast China and adjacent region.Science in China Series D:Earth Sciences,52(5):619-626.
Wang D Y,Wang C S,Du S Q.1998.The tectonic evolution of the northeast of Nei Mongol and its adjacency in pre mesozoic era.Journal of Chengdu University of Technology(in Chinese),25(4):529-536.
Wei J S,Lu J C,Wei X X,et al.2012.The influence of intense weathering on the evaluation indexes of hydrocarbon source rocks:A case study of Carboniferous-Permian Strata of Ejin Banner and its neighboring areas.Geological Bulletin of China(in Chinese),31(10):1715-1723.
Xue H T.2004.Study of carbonate source rocks evaluation criterion[Ph.D.thesis](in Chinese).Daqing:Daqing Petroleum Institute.
Yuan J Y,Chen Q L,Chen Y B,et al.2006.Petroleum geological character and favorable exploration domains of Qaidam Basin.Natural Gas Geoscience(in Chinese),17(5):640-644.
Zhang F X,Yao H,Zhang X Z,et al.2012.The sandwich electrical structures in Erlian basin and its significance for Paleozoic erathom.Chinese Journal of Geophysics(in Chinese),55(9):3134-3143,doi:10.6038/j.issn.0001-5733.2012.09.031.
Zhang X Z,Qiao D W,Chi X G,et al.2011.Late-Paleozoic tectonic evolution and oil-gas potentiality in northeastern China.Geological Bulletin of China(in Chinese),30(2-3):205-213.
Zhang X Z,Zhou J B,Chi X G,et al.2008.Late Paleozoic tectonicsedimentation and petroleum resources in Northeastern China.Journal of Jilin University(Earth Science Edition)(in Chinese),38(5):719-725.
Zhao M J,Wang Z M,Pan W Q,et al.2008.Lower Palaeozoic source rocks in Manjiaer Sag,Tarim Basin.Petroleum exploration and development(in Chinese),35(4):417-423.
Zhou J B,Zhang X Z,Ma Z H,et al.2009.Tectonic framework and basin evolution in Northeast China.Oil&Gas Geology(in Chinese),30(5):530-538.
陈亚青,樊太亮,赵志刚等.2010.二连盆地赛51上古生界碳酸盐岩潜山油藏的发现与启示.石油天然气学报(江汉石油学院学报),32(3):209-213.
韩春元,金凤鸣,王静等.2011.内蒙古二连盆地上古生界油气勘探前景.地质通报,30(2):243-249.
黄汲清,任纪舜,姜春发等.1977.中国大地构造基本轮廓.地质学报,(2):117-135.
卢双舫,薛海涛,钟宁宁.2003.地史过程中烃源岩有机质丰度和生烃潜力变化的模拟计算.地质论评,49(3):292-297.
马国庆,杜晓娟,李丽丽.2013.优化小子域滤波方法研究及其应用.石油地球物理勘探,48(4):658-662.
饶松,朱传庆,王强等.2013.四川盆地震旦系-下古生界烃源岩热演化模式及主控因素.地球物理学报,56(5):1549-1559,doi:10.6038/cjg20130513.
宋景明,金凤鸣,王玉青等.2012.二连盆地重磁异常地质意义及
上古生界结构认识.石油地球物理勘探,47(S1):140-146.
王成文,金巍,张兴洲等.2008.东北及邻区晚古生代大地构造属性新认识.地层学杂志,32(2):119-136.
王成文,孙跃武,李宁等.2009.中国东北及邻区晚古生代地层分布规律的大地构造意义.中国科学D辑:地球科学,39(10):1429-1437.
王道永,王成善,杜思清.1998.内蒙古东北部及周边地区前中生代构造发展演化史.成都理工学院学报,25(4):529-536.
魏建设,卢进才,魏仙样等.2012.强烈风化作用对烃源岩评价指标的影响---以额济纳旗及邻区石炭系-二叠系为例.地质通报,31(10):1715-1723.
薛海涛.2004.碳酸盐岩烃源岩评价标准研究[博士论文].大庆:大庆石油学院.
袁剑英,陈启林,陈迎宾等.2006.柴达木盆地油气地质特征与有利勘探领域.天然气地球科学,17(5):640-644.
张凤旭,姚欢,张兴洲等.2012.二连盆地“三明治”电性结构特征及其对古生界的研究意义.地球物理学报,55(9):3134-3143,doi:10.6038/j.issn.0001-5733.2012.09.031.
张兴洲,乔德武,迟效国等.2011.东北地区晚古生代构造演化及其石油地质意义.地质通报,30(2-3):205-213.
张兴洲,周建波,迟效国等.2008.东北地区晚古生代构造-沉积特征与油气资源.吉林大学学报(地球科学版),38(5):719-725.
赵孟军,王招明,潘文庆等.2008.塔里木盆地满加尔凹陷下古生界烃源岩的再认识.石油勘探与开发,35(4):417-423.
周建波,张兴洲,马志红等.2009.中国东北地区的构造格局与盆地演化.石油与天然气地质,30(5):530-538.
Han C Y,Jin F M,Wang J,et al.2011.Exploration prospect of hydrocarbon of Neopaleozoic in Erlian basin,Inner Mongolia,China.Geological Bulletin of China(in Chinese),30(2):243-249.
Huang J Q,Ren J S,Jiang C F,et al.1977.An outline of the tectonic characteristics of China.Acta Geological Sinica(in Chinese),(2):117-135.
Liu D,Zhang W Z,Kong Q F,et al.2016.Lower Paleozoic source rocks and natural gas origins in Ordos Basin,NW China.Petroleum Exploration and Development,43(4):591-601.
Lu S F,Xue H T,Zhong N N.2003.Simulating calculation of the variations of organic matter abundance and hydrocarbongenerating potential during geological processes.Geological Review(in Chinese),49(3):292-297.
Ma G Q,Du X J,Li L L.2013.An optimized small sub-domain filtering method.Oil Geophysical Prospecting(in Chinese),48(4):658-662.
Pepper A S.1991.Estimating the petroleum expulsion behaviour of source rocks:a novel quantitative approach.Geological Society,London,Special Publications,59(1):9-31.
Rao S,Zhu C Q,Wang Q,et al.2013.Thermal evolution patterns of the Sinian-Lower Paleozoic source rocks in the Sichuan basin,southwest China.Chinese Journal of Geophysics(in Chinese),56(5):1549-1559,doi:10.6038/cjg20130513.
Scalan E S,Smith J E.1970.An improved measure of the odd-even predominance in the normal alkanes of sediment extracts and petroleum.Geochimica et Cosmochimica Acta,34(5):611-620.
Song J M,Jin F M,Wang Y Q,et al.2012.Geological implications of gravity and magnetic anomalies in Erlian Basin and understanding of Upper Paleozoic structures.Oil Geophysical Prospecting(in Chinese),47(S1):140-146.
Wang C W,Jin W,Zhang X Z,et al.2008.New understanding of the Late Paleozoic tectonics in northeastern China and adjacent areas.Journal of Stratigraphy(in Chinese),32(2):119-136.
Wang C W,Sun Y W,Li N,et al.2009.Tectonic implications of Late Paleozoic stratigraphic distribution in Northeast China and adjacent region.Science in China Series D:Earth Sciences,52(5):619-626.
Wang D Y,Wang C S,Du S Q.1998.The tectonic evolution of the northeast of Nei Mongol and its adjacency in pre mesozoic era.Journal of Chengdu University of Technology(in Chinese),25(4):529-536.
Wei J S,Lu J C,Wei X X,et al.2012.The influence of intense weathering on the evaluation indexes of hydrocarbon source rocks:A case study of Carboniferous-Permian Strata of Ejin Banner and its neighboring areas.Geological Bulletin of China(in Chinese),31(10):1715-1723.
Xue H T.2004.Study of carbonate source rocks evaluation criterion[Ph.D.thesis](in Chinese).Daqing:Daqing Petroleum Institute.
Yuan J Y,Chen Q L,Chen Y B,et al.2006.Petroleum geological character and favorable exploration domains of Qaidam Basin.Natural Gas Geoscience(in Chinese),17(5):640-644.
Zhang F X,Yao H,Zhang X Z,et al.2012.The sandwich electrical structures in Erlian basin and its significance for Paleozoic erathom.Chinese Journal of Geophysics(in Chinese),55(9):3134-3143,doi:10.6038/j.issn.0001-5733.2012.09.031.
Zhang X Z,Qiao D W,Chi X G,et al.2011.Late-Paleozoic tectonic evolution and oil-gas potentiality in northeastern China.Geological Bulletin of China(in Chinese),30(2-3):205-213.
Zhang X Z,Zhou J B,Chi X G,et al.2008.Late Paleozoic tectonicsedimentation and petroleum resources in Northeastern China.Journal of Jilin University(Earth Science Edition)(in Chinese),38(5):719-725.
Zhao M J,Wang Z M,Pan W Q,et al.2008.Lower Palaeozoic source rocks in Manjiaer Sag,Tarim Basin.Petroleum exploration and development(in Chinese),35(4):417-423.
Zhou J B,Zhang X Z,Ma Z H,et al.2009.Tectonic framework and basin evolution in Northeast China.Oil&Gas Geology(in Chinese),30(5):530-538.
陈亚青,樊太亮,赵志刚等.2010.二连盆地赛51上古生界碳酸盐岩潜山油藏的发现与启示.石油天然气学报(江汉石油学院学报),32(3):209-213.
韩春元,金凤鸣,王静等.2011.内蒙古二连盆地上古生界油气勘探前景.地质通报,30(2):243-249.
黄汲清,任纪舜,姜春发等.1977.中国大地构造基本轮廓.地质学报,(2):117-135.
卢双舫,薛海涛,钟宁宁.2003.地史过程中烃源岩有机质丰度和生烃潜力变化的模拟计算.地质论评,49(3):292-297.
马国庆,杜晓娟,李丽丽.2013.优化小子域滤波方法研究及其应用.石油地球物理勘探,48(4):658-662.
饶松,朱传庆,王强等.2013.四川盆地震旦系-下古生界烃源岩热演化模式及主控因素.地球物理学报,56(5):1549-1559,doi:10.6038/cjg20130513.
宋景明,金凤鸣,王玉青等.2012.二连盆地重磁异常地质意义及
上古生界结构认识.石油地球物理勘探,47(S1):140-146.
王成文,金巍,张兴洲等.2008.东北及邻区晚古生代大地构造属性新认识.地层学杂志,32(2):119-136.
王成文,孙跃武,李宁等.2009.中国东北及邻区晚古生代地层分布规律的大地构造意义.中国科学D辑:地球科学,39(10):1429-1437.
王道永,王成善,杜思清.1998.内蒙古东北部及周边地区前中生代构造发展演化史.成都理工学院学报,25(4):529-536.
魏建设,卢进才,魏仙样等.2012.强烈风化作用对烃源岩评价指标的影响---以额济纳旗及邻区石炭系-二叠系为例.地质通报,31(10):1715-1723.
薛海涛.2004.碳酸盐岩烃源岩评价标准研究[博士论文].大庆:大庆石油学院.
袁剑英,陈启林,陈迎宾等.2006.柴达木盆地油气地质特征与有利勘探领域.天然气地球科学,17(5):640-644.
张凤旭,姚欢,张兴洲等.2012.二连盆地“三明治”电性结构特征及其对古生界的研究意义.地球物理学报,55(9):3134-3143,doi:10.6038/j.issn.0001-5733.2012.09.031.
张兴洲,乔德武,迟效国等.2011.东北地区晚古生代构造演化及其石油地质意义.地质通报,30(2-3):205-213.
张兴洲,周建波,迟效国等.2008.东北地区晚古生代构造-沉积特征与油气资源.吉林大学学报(地球科学版),38(5):719-725.
赵孟军,王招明,潘文庆等.2008.塔里木盆地满加尔凹陷下古生界烃源岩的再认识.石油勘探与开发,35(4):417-423.
周建波,张兴洲,马志红等.2009.中国东北地区的构造格局与盆地演化.石油与天然气地质,30(5):530-538.
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