地质学报2012，Vol.86Issue(8)：1188-1197,10.
塔里木盆地塔河地区海西晚期火山岩构造特征与油气成藏
The Tectonic Characteristics and Hydrocarbon Accumulation of Late Hercynian Volcanic Rocks in the Tahe Area, Tarim Basin
摘要
Abstract
The faults in volcanic rocks of the Tahe area can be classified into three types based on the interpretation of the seismic profiles: deep-layer faults, shallow-layer faults and micro-faults within the volcanic rocks. Through compiling faulting distribution mapi the fault characters, formation periods, distribution characteristic and origin of the volcanic rock in the Tahe area have been analyzed. It is believed that the deep-layer faults,mainly thrust faults, were formed during the period of Caledonian and Hercynian stages. These faults trending NNE, NE and NNW are distributed in the north and northwest parts of the Tahe volcanic area. The shallow-layer faults, mainly normal faults, were formed during the period of Yanshan and Himalayan Stages. The faults trending NE and NNE are distributed in the volcanic rocks near the salt margin and up-salt volcanic area of the southeast part. The micro-faults within the volcanic rocks, developed in the top of volcanic rocks much more than that in the bottom of volcanic rocks, mainly distribute in the western part of the Tahe area. Three oil-gas trap types of volcanic rock have been classified according to the origin of the volcanic reservoir and structure. They are the traps controlled by structural fissures, leaching and weathering, the traps controlled by paleo-uplift, unconformities, leaching and weathering, the traps controlled by buried-dissolving, erosion and structural fissions. The conditions of the cap-rocks and hydrocarbon accumulation of volcanic beds have been analyzed. It is indicated that mudstone of Ketuer formation of the bottom Triassic may be an effective regional seal bed. The favorable hydrocarbon accumulation conditions may exist in the volcanic beds in the Tahe area, Tarim Basin.关键词
火山岩/构造特征/油气成藏/海西晚期/塔河地区/塔里木盆地Key words
volcanic rock/ tectonic characteristics/ hydrocarbon accumulation/ Late Hercynian/ Tahe area/Tarim Basin引用本文复制引用
汤良杰,黄太柱,邱海峻,崔泽宏,万桂梅,金仙梅,杨素举..塔里木盆地塔河地区海西晚期火山岩构造特征与油气成藏[J].地质学报,2012,86(8):1188-1197,10.基金项目
本文为国家自然科学基金项目(编号41172125、40972090、40672143、40472107)、国家973项目(编号2012CB214804、2005CB422107)、全国油气资源战略选区调查与评价国家专项(编号2009GYXQ02-05)、国家科技重大专项(编号2011ZX05002-003-001)、中国石化股份有限公司项目(编号P11086)和中国石化西北油田分公司项目(编号KY-S-2006-014)共同资助的成果. （编号41172125、40972090、40672143、40472107）
