Accumulation of Upper Cambrian ancient reservoir in Wangcun, southern margin of middle Yangtze region
-
摘要: 通过流体包裹体类型观察、均一温度测定,同时结合盆地模拟及原油裂解动力学计算,对中扬子区南缘永顺王村上寒武统古油藏进行了详细的解剖,认为加里东期,中扬子南缘地区普遍接受下寒武统烃源岩有效供烃,局部地区上震旦统烃源岩也形成有效供烃灶,研究区所在的斜坡为油气运移指向区,聚集形成原生油藏.早中三叠世,震旦系和中下寒武统中的原生油气藏在印支构造主幕下发生油气调整,王村古油藏就此形成.晚三叠世-早侏罗世,王村古油藏在挠曲构造或逆冲推覆体作用下被深埋,油气藏迅速发生原油裂解,原油裂解气型烃源灶接力供烃,彻底转变为气藏,同时也加速了油气散失的速度.后期在燕山Ⅱ幕强烈改造以及喜山运动的叠加改造下,古油气藏散失殆尽.Abstract: Based on microscopic observation and micro-thermometry measurement of fluid inclusions,combined with basin simulation and crude oil pyrolysis calculation,it is discussed in this paper the Upper Cambrian reservoir in Wangcun,the southern margin of the middle Yangtze region.During the Caledonian period,the southern margin of the middle Yangtze region accepted hydrocarbon from the Lower Cambrian source rocks.In some regions,the Upper Sinian source rocks also worked as effective hydrocarbon kitchens.Wangcun,located on the slope,was the destination of hydrocarbon migration,resulting in primary pool.During the Early and Middle Triassic,primary pools in Sinian and the Middle and Lower Cambrian adjusted due to the Indosinian Movement and the Wangcun ancient reservoir was formed.From the Late Triassic to the Early Jurassic,the Wangcun ancient reservoir was buried deep as the result of flexing or thrust-nappe effect.Crude oils cracked rapidly and oil-cracking-gas source kitchen supplied hydrocarbon in succession.The Wangcun reservoir transformed to gas pool completely,accelerating the dissipation rate of oil and gas.Due to the strong deformations during Yangshan and Himalayan stages,the ancient reservoir finally disappeared.
-
[1] 赵文智,何登发,宋岩,等.中国陆上含油气盆地石油地质特征[J].地质论评,1999,45(3):20-28. [2] 戴少武,贺自爱,王津义.中国南方中、古生界油气勘探的思路[J].石油与天然气地质,2001,22(3):195-202. [3] 赵文智,张光亚,王红军,等.中国叠合含油气盆地石油地质基本特征与研究方法[J].石油勘探与开发,2003,30(2):1-8. [4] 赵宗举,朱琰,邓红婴.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. [5] 赵宗举,朱 琰,徐云俊.中国南方古生界-中生界油气藏成藏规律及勘探方向[J].地质学报,2004,78(5):710-717. [6] 徐思煌,袁彩萍,梅廉夫.叠合盆地成藏流体源类型、演化及控藏意义:以中国南方中、古生界海相地层为例[J].地质科技情报,2007,26(2):59-63. [7] 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. [8] 金之钧,周雁.我国南方王村上寒武统大型古油藏的首次发现[J].天然气地球科学,2009,20(2):159-161. [9] 戴金星.威远气田成藏期及气源[J].石油实验地质,2003,25(5):473-480. [10] 刘树根,马永生,蔡勋育,等.四川盆地震旦系下古生界天然气成藏过程和特征[J].成都理工大学学报(自然科学版),2009,36(4)345-354. [11] 赵宗举,冯加良,陈学时,等.湖南慈利灯影组古油藏的发现及意义[J].石油与天然气地质,2001,22(2):114-118. [12] 梁狄刚,陈建平.中国南方高、过成熟区海相油源对比问题[J].石油勘探与开发,2005,32(2):8-14. [13] 孙玮,刘树根,马永生,等.四川盆地威远-资阳地区震旦系油裂解气判定及成藏过程定量模拟[J].地质学报,2007,81(8):1153-1158. [14] 李艳霞,钟宁宁.川东石炭系气藏中固体沥青形成机理探讨[J].石油实验地质,2007,29(4):402-404. [15] 李艳霞,钟宁宁.川东石炭系原油裂解型气藏成藏史分析[J].石油与天然气地质,2007,28(2):274-279. [16] 戴俊生,马占荣,冀国盛,等.扬子板块中部南山坪背斜的形成与演化[J].中国地质,2003,30(4):367-371. [17] 侯光久.江南古陆的构造属性讨论:以湖南马底驿地区板溪群为例[J].地质科技情报,1998,17 (3):1-6. [18] 冯向阳,孟宪刚,邵兆刚,等.雪峰山陆内造山带变形特征及挤压推覆-伸展滑脱构造的物理模拟[J].地球学报,2001,22(5):419-424. [19] 丁道桂,郭彤楼,刘运黎,等.对江南-雪峰带构造属性的讨论[J].地质通报,2007,26(7):501-509. [20] 刘新民,付宜兴,郭战峰,等.中扬子区南华纪以来盆地演化与油气响应特征[J].石油实验地质,2009,31(2):160-165. [21] 李艳霞,郭云飞,李净红.鄂东南通山半坑志留系古油藏成藏解剖[J].西安石油大学学报(自然科学版),2009,24(6):5-8. [22] 向才富,汤良杰,李儒峰,等.叠合盆地幕式流体活动:麻江古油藏露头与流体包裹体证据[J].中国科学D辑:地球科学,2008,38(S1):70-77. -
点击查看大图
计量
- 文章访问数: 1644
- HTML全文浏览量: 82
- PDF下载量: 952
- 被引次数: 0
下载:
苏公网安备32021102000780号