| 多旋回叠合盆地烃流体源与构造变形响应: 以扬子地块中古生界海相为例 |
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| 引用本文： | 汤济广,梅廉夫,沈传波,刘昭茜.多旋回叠合盆地烃流体源与构造变形响应: 以扬子地块中古生界海相为例[J].地球科学,2012,37(3):526-534. |
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| 作者姓名： | 汤济广 梅廉夫 沈传波 刘昭茜 |
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| 作者单位： | 1.长江大学地球科学学院, 湖北荆州 434023 |
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| 基金项目： | 国家科技重大专项研究项目2008ZX005004国家自然科学基金项目41102091中国地质大学构造与油气资源教育部重点实验室开放研究基金项目TPR-2009-01中国地质大学构造与油气资源教育部重点实验室开放研究基金项目TPR-2010-25 |
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| 摘 要： | 多旋回叠合盆地的多旋回构造演化制约着盆地的成烃演化, 使烃流体源显示多源化的特征, 而构造变形对烃流体源的成烃制约主要是通过对地质体的埋藏作用来体现.基于扬子地块海相构造变形, 将其分为断陷反转、断块反转、逆冲推覆和复合叠加等4类构造变区形, 并确立相应构造变形作用下中新生代海相地层构造-埋藏类型.通过烃流体源与地质体构造-埋藏类型对应关系的建立, 认为下扬子与中扬子江汉断陷区的强烈暴露-断陷埋藏构造变形控制的烃流体源为残留烃流体源和二次生烃; 中扬子湘鄂西和大洪山的强烈隆升-海相暴露变形区烃流体源为残留烃流体源; 大巴山和龙门山前陆冲断带的晚期弱抬升-推覆埋藏构造变形制约的烃流体源为干酪根裂解气、油裂解气和残留烃流体源, 而江南隆起北缘推覆体下地质体的强烈隆升-推覆埋藏致使烃流体源可能为干酪根裂解气和油裂解气; 上扬子持续埋藏-晚期隆升区烃流体源为干酪根裂解气、油裂解气和沥青裂解气.
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| 关 键 词： | 烃流体源 构造变形 多旋回叠合盆地 海相地层 扬子地块 石油地质 |
| 收稿时间： | 2011-09-23 |
Response of Hydrocarbon Fluid Source to Tectonic Deformation in Multicycle Superimposed Basin: Example from Palaeozoic and Mesozoic Marine Strata in Yangtze Block |
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| Abstract: | Multicycle tectonic evolution controls the hydrocarbon-generation evolution, and causes variegated genesis of hydrocarbon fluid source in the multicycle superimposed basin. The temperature is the essential factor to hydrocarbon-generation evolution, and it could be reflected by burial depth of geologic body, so the control of tectonic deformation on hydrocarbon-generation evolution of hydrocarbon fluid source is mainly displayed by the burial history of geologic body. According to the tectonic evolution characteristics, there are four kinds of different deformation in Yangtze block, such as inversion of fault depression, inversion of fault block, thrusting and composite superimpose, then, the four patterns of tectonic evolution-burial history are also established about the marine strata in Meso-Cenozoic. Based on the response of hydrocarbon fluid source to the type of tectonic evolution-burial history, the study indicates that there are vestigal protogenic hydrocarbon and hydrocarbon generated secondly from kerogen in Lower Yangtze region and Jianghan fault depression of whose tectonic evolution-burial history is consuming exposure-fault depression burial, and vestigal protogenic hydrocarbon in the western Hunan-Hubei and Dahongshan area in Middle Yangtze region of which is consuming uplift-marine strata exposure, kerogen-cracking gas, oil-cracking gas and vestigal protogenic hydrocarbon in the thrust belts of Longmenshan and Dabashan of which is late low uplift-thrust burial, kerogen-cracking gas and oil-cracking gas in the northern Jiangnan uplift of which is consuming uplift-thrust burial, kerogen-cracking gas, oil-cracking gas and bitumen-cracking gas in Upper Yangtze region whose type of ones is durative burial-later uplift. |
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