CAUSES AND SIGNIFICANCE OF ABNORMAL THERMAL EVOLUTION OF ORGANIC MATTERS IN CHANGYANG AREA, HUBEI PROVINCE
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摘要: 对湖北长阳地区上震旦统—下三叠统系统的镜质体(沥青)反射率和伊利石结晶度测试分析表明,在二叠系—志留系上部和志留系底部—下寒武统上部存在2个等效镜质体反射率和伊利石结晶度异常带。综合分析认为,上部异常带为平流热液流体沿云台观组(D2y)、纱帽组(S3sh)等砂岩储层和D2y/S3sh、岩关组(C1y)/泥盆系等不整合面流动的热效应所致;下部异常带为热液流体在石龙洞组(-C1s)—奥陶系储层中形成热对流造就。燕山期热液流体的热效应使区内二叠系、五峰组—龙马溪组烃源岩理论上在中三叠世末停滞的生烃作用持续至侏罗纪末,延长了烃源岩生烃时期,有利于油气聚集。Abstract: Studies of vitrinite reflectance and illite crystallinity from Upper Sinian to Lower Triassic in Chang-yang area of Hubei Province have indicated that,there are 2 abnormal zones of equivalent vitrinite reflectance and illite crystallinity between Permian-top of Silurian and bottom of Silurian-top of Lower Cambrian.The upper abnormal zone is formed by thermal effects of advection hot liquid flowing along D2y,S3sh sandstone reservoir as well as D2y/S3sh,C1y/D unconformity surface.The lower abnormal zone is formed by thermal convection of hot liquid in-C1s-O reservoir.Hydrocarbon generation in P and O3w-S1ln should stop at the end of Middle Triassic;however,due to thermal effect of hot liquid during the Yanshanian stage,it continues to the end of Jurassic,hence favorable for petroleum accumulation.
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[1] 张厚福,方朝亮,张枝焕,等.石油地质学[M].北京:石油工业出版社,1999:193-199. [2] 陆克政.含油气盆地分析[M].东营:中国石油大学出版社,2006:320-348. [3] 秦建中,饶丹,蒋宏.高演化海相碳酸盐岩层系古温标的直接指标:包裹体均一温度[J].石油实验地质,2008,30(5):494-498. [4] 周成礼,冯石,王世成,等.磷灰石裂变径迹长度分布数值模拟及地质应用[J].石油实验地质,1994,16(4):409-416. [5] 秦建中,腾格尔,杨琦,等.川东地区海相高演化层系的成熟度指标研究[J].石油学报,2009,30(2):208-213. [6] 王宝清.川西-川西北地区上三叠统碎屑储集岩成岩作用[J].石油实验地质,2008,30(1):69-74. [7] 王玮,周祖翼.镜质体反射率剖面反演中的不确定性分析:以鄂西渝东茶园1井为例[J].石油实验地质,2008,30(3):292-296. [8] 程克明,王兆云,钟宁宁,等.碳酸盐岩油气生成理论与实践[M].北京:石油工业出版社,1996:176-197. [9] 程克明,王兆云,熊英.中国海相碳酸盐岩的生烃研究[J].海相油气地质,1999,4(4):1-11. [10] 郝石生,高岗,王飞宇,等.高过成熟海相烃源岩[M].北京:石油工业出版社,1996:72-84. [11] 戴鸿鸣,王顺玉,陈义才.油气地球化学勘探[M].北京:石油工业出版社,2000:198-208. [12] KISCH H J.Dlite crystallinity:Recommenadtions on sample preprartion,X-ray diffraction setting,and interlaboratory samples[J].Journal of Metamorphic Geology,1991,9(6):665-670. [13] 丰国秀,陈盛吉.岩石中沥青反射率与镜质体反射率之间的关系[J].天然气工业,1988,8(2):20-25. [14] 毕先梅,莫宣学.成岩-极低级变质-低级变质作用及有关矿产[J].地学前缘,2004,11(1):287-294. [15] 曹学伟,胡文瑄,金之钧,等.临盘油田夏38井区辉绿岩热效应对成烃作用的影响[J].石油与天然气地质,2005,26(3):317-322. [16] 孙永革,傅家谟,刘德汉,等.火山活动对沉积有机质演化的影响及其油气地质意义[J].科学通报,1995,40(11):1019-1022. [17] 钟建华.剪切作用对有机质光学各向异性体发育的控制[J].地质力学学报,1997,3(3):39-40. [18] 董亨茂,张生根,胡远清.断层作用热模型及其对烃源岩热演化的影响[J].地质力学学报,2006,12(4):445-453. [19] 胡善亭,杨起,潘治贵,等.鸡西煤田煤的热液变质作用[J].煤炭学报,1996,21(4):343-347. [20] 郝芳,孙永传,李思田,等.活动热流体对有机质热演化和油气生成作用的强化[J].地球科学:中国地质大学学报,1996,21(1):68-72. [21] 袁玉松,朱传庆,胡圣标.江汉盆地热流史、沉积构造演化与热事件[J].地球物理学进展,2007,22(3):934-939. [22] 薄冬梅,姜林,唐艳军,等.热流体活动与油气成藏[J].西南石油大学学报,2007,29(5):38-41. [23] 叶加仁,杨香华.沉积盆地热流体活动及其成藏动力学意义[J].沉积学报,2001,19(2):214-218.
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