HIGH-QUALITY SOURCE ROCKS IN THE LOWER COMBINATION IN SOUTHEAST UPPER-YANGTZE AREA AND THEIR HYDROCARBON GENERATING POTENTIAL
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摘要: 湘鄂地区海相下组合具良好的油气勘探前景,但地质条件复杂,勘探程度低.咸丰、大庸地区可能烃源岩的系统观测和有机地化剖面研究显示,下寒武统、上奥陶统五峰组—下志留统龙马溪组底部均发育一套黑色页岩,其有机质丰度高,总有机碳含量普遍大于1%;属藻腐泥型,生烃潜力高;具一定规模,厚度达数十米至百余米,分布稳定;有良好的生烃和油气显示,是2套优质烃源岩.晚侏罗世—白垩纪时下寒武统烃源岩已达过成熟早中期生干气阶段,上奥陶统和下志留统烃源岩进入了高成熟晚期至过成熟早期阶段,处于生气高峰期.这2套优质烃源岩的存在,可为湘鄂西、鄂西渝东和雪峰山推覆带等地区下组合的油气生成、成藏提供雄厚的物质基础.Abstract: There are good oil and gas exploration prospect in the southeast of Upper-Yangtze area,but the geologic conditions are complicated and the degree of exploration is low there.The potential hydrocarbon source rocks in Xianfeng and Dayong areas were studied to determine the characteristics of their organic geochemistry,petrology,carbon isotope composition and thermal evolution,etc.Two series of high-quality hydrocarbon source rocks were discovered.They are the Lower Cambrian black shale and the Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation black shale in the Lower Palaeozoic.Both of them have characteristics as follows: 1)good organic types(sapropel type),high abundance of organic materials and hydrocarbon potentials;2)large thickness and extensive distribution;3)good hydrocarbon generating potential and evidences of oil(bitumen) and gas.At the Late Jurassic-Cretaceous,the thermal evolution degree of the hydrocarbon source rock in the Lower Cambrian has come to the early stage of over-mature at which the dry gas was generated.And the hydrocarbon source rock in the Upper Ordovician-Lower Silurian has come into the late stage of high-mature to the early stage of over-mature,which was the peak period of gas generation.These high-quality hydrocarbon source rocks provide abundant organic material basis for the hydrocarbon generation and accumulation in the Lower Combination in the west of Hunan and Hubei,the east of Chongqing and the Xuefengshan nappe zone.
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[1] 谢姚祥,丁玉兰,罗启后.21世纪初叶四川盆地天然气发展前景[J].天然气工业,2000,20(6):1~6 [2] 马永胜,郭旭升,郭彤楼等.四川盆地普光大型气田的发现与勘探启示[J].地质论评,2005,51(4):477~480 [3] 金顺爱.中国海相油气地质勘探与研究--访李德生院士[J].海相油气地质,2005,10(2):1~8 [4] 周雁.湘鄂地区钻探效果分析及勘探方向[J].石油勘探与开发,1999,26(1):36~39 [5] 罗志立,刘树根,刘顺.四川盆地勘探天然气有利地区和新领域探讨(下)[J].天然气工业,2000,20(5):4~8 [6] 李干生.从近期勘探成果展望勘探前景(之二)[J].中国石化,2003,210(3):17~20 [7] 李大成,赵宗举,徐云俊.中国海相地层油气成藏条件与有利勘探领域分析[J].海相油气地质,2004,9(5):3~11 [8] 戴金星,王庭斌.中国大中型天然气田形成条件与油气分布规律[M].北京:地质出版社,1997.1~300 [9] 梁狄刚,张水昌,张宝民等.从塔里木盆地看中国海相生油问题[J].地学前缘,2000,7(4):534~547 [10] 郭彤楼,田海芹.南方中古生界油气勘探的若干地质问题及对策[J].石油与天然气地质,2002,23(3):244~247 [11] 宋岩.中国天然气资源分布特征与勘探方向[J].天然气工业,2003,23(1):1~4 [12] 夏新宇,洪峰,赵林.烃源岩生烃潜力的恢复探讨--以鄂尔多斯盆地下奥陶统碳酸盐岩为例[J].石油与天然气地质,1998,19(4):307~312 [13] 黄第藩,李晋超,张大江.干酪根的类型及其分类参数的有效性、局限性和相关性[J].沉积学报,1984,2(3):18~33 [14] Schidlowski M.13C/12C值作为生物成因标志[A].见:约翰斯R B主编.沉积记录中的生物标志物[M].王铁冠,黄第藩,徐丽娜等译.北京:科学出版社,1991.205~213 [15] 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,1996.126~127 [16] 涂建琪,金奎励.表征海相烃源岩有机质成熟度的若干重要指标的对比与研究[J].地球科学进展.1999,14(1):18~23 [17] Jacob H.Disperse solid bitumens as an indicator for migration and maturity in prospecting for oil and gas[J].Erdolund Kohle,1985,38:365 [18] 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(3):20~25 [19] 刘树根,罗志立.从华南板块构造演化探讨中国南方油气藏分布的规律性[J].石油学报,2001,22(4):24~30 [20] 赵宗举,冯加良,陈学时等.湖南慈利灯影组古油藏的发现及其意义[J].石油与天然气地质,2001,22(2):114~118 [21] 赵宗举,朱琰,邓红婴等.中国南方古隆起对中-古生界原生油气藏的控制作用[J].石油实验地质,2003,25(1):10~17 [22] 许靖华,奥伯亨斯利H,高新元等.寒武纪生物爆发前的死劫难海洋[J].地质科学,1986,(1):1~6 [23] Conway M S.The Burgess shale faunas and the Cambrian explosion[J].Science,1989,246:339~346 [24] Steiner M,Wallis E,Erdtmann B D,et al.Submarine-hydrothermal exhalative ore layers in black shales from South China and associated fossils:Insights into a lower Cambrian facies and bio-evolution[J].Palaeogeography,Palaeoclimatolgy,Palaeoecology,2001,169:165~ 191 [25] 姜月华,岳文浙,业治铮.华南下古生界缺氧事件与黑色页岩及有关矿产[J].有色金属矿产与勘查,1994,3(5):272~278 [26] 李胜荣,高振敏.湘黔寒武系底部黑色岩系贵金属元素来源示踪[J].中国科学D辑,2000,30(2):169~174 [27] 陈旭,肖承协,陈洪冶.华南五峰期笔石动物群的分异及缺氧环境[J].古生物学报,1987,26(3):326~344 [28] 腾格尔,刘文汇,徐永昌等.缺氧环境及地球化学判识标志的探讨--以鄂尔多斯盆地为例[J].沉积学报,2004,22(2):365~372 [29] 文志刚,扬申谷,李建明等.桑植-石门复向斜成藏条件探讨[J].江汉石油学院学报,2003,25(4):21~23 [30] 马力,陈焕疆,甘克文等.中国南方大地构造和海相油气地质[M].北京:地质出版社,2005.265~275 [31] 刘光祥,陶静源,潘文蕾等.川东北及川东天然气成因类型探讨[J].石油实验地质,2002,24(6):512~576 [32] 马永生,傅强,郭彤楼等.川东北地区普光气田长兴-飞仙关气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5):455~461 [33] 蔡立国,饶丹,潘文蕾等.川东北地区普光气田成藏模式研究[J].石油实验地质,2005,27(5):462~467
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