CHARACTERISTICS OF LIGHT HYDROCARBON IN OIL SEEPING ROCKS IN THE HONGHUAYUAN FORMATION OF ORDOVICIAN, HOUBA, ZUNYI
-
摘要: 遵义后坝奥陶系红花园组生物碎屑灰岩中发现油苗和沥青,经过气/源岩、沥青/源岩对比,震旦、寒武及奥陶系产层轻烃C6+7结构组成基本一致,奥陶系含油苗灰岩轻烃星图与震旦系泥岩、寒武系沥青砂岩星图较为相似,显示红花园组油苗主要来源于震旦系和下古生界过成熟或高成熟海相烃源岩,油气经历了较长距离的运移,得以在奥陶系中保存下来。这对评价该地区油气前景有重要意义,预示着可能存在一套特殊的含油气组合,存在以O1h古风化壳储集层为目的层的勘探领域。在兴文—叙永一线以西地区现今下古生界储盖组合保存良好,在适当的构造圈闭中可形成油气藏。志留系和二叠系产层轻烃C6+7与震旦系、寒武系及奥陶系等产层轻烃C6+7明显有别,星图对比性差,表征它们之间成烃母质或沉积环境均有不同。Abstract: Oil seepage and bitumen have been found in biocalcarenite in the Honghuayuan Formation of Ordovician in Houba,Zunyi.Gas/source rock and bitumen/source rock comparisons have indicated that,light hydrocarbon C6+7 compositions in the Sinian,Cambrian and Ordovician productive formations are almost the same.Star maps of light hydrocarbon in Ordovician oil seeping limestone,Sinian mudstone and Cambrian bitumen sandstone are similar,which means that,oil seepages in the Honghuayuan Formation mainly come from over mature and high mature marine source rocks in the Lower Palaeozoic.Petroleum migrates for a long distance and is reserved in Ordovician.A set of special oil-bearing composition and an exploration field with the O1h fossil weathered residuum reservoir as the target may exist.To the west of Xingwen-Xuyong,reservoir and cap formation are kept well in the Lower Palaeozoic.Accumulation may be found in proper tectonic traps.Light hydrocarbon C6+7 compositions in Silurian and Permian are quite different from those in Sinian,Cambrian and Ordovician with incomparable star maps,indicating the differences between hydrocarbon generation parent and deposition environment.
-
[1] 刘光祥,蒋启贵,潘文蕾等.干气中浓缩轻烃分析及应用:以川东北、川东区天然气气/源对比研究为例[J].石油实验地质,2003,25(增刊):585~589. [2] 唐艳,叶军.轻烃指纹参数在川西坳陷天然气成藏研究中的应用[J].油气地质与采收率,2001,8(6):17~21. [3] 马柯阳,曹建平,张晓宝等.塔里木盆地古生界岩石轻烃的地球化学特征[J].沉积学报,1999,17(3):487~491. [4] 张敏,张俊,张春明.塔里木盆地原油轻烃地球化学特:征[J].地球化学,1999,28(2):191~196. [5] 陈正辅.塔里木盆地油气资源的基本特征[J].海相油气地质,1997,2(1):15~20. [6] 林壬子.轻烃技术在油气勘探中的应用[M].武汉:中国地质大学出版社,1990. [7] 张春明,金迪威.塔中地区轻烃特征及其意义[J].石油与天然气地质,1997,18(4):332~334. [8] Mango F D.The origin of light hydrocarbons in petroleum:A kinetic test of steady-state catalytic hypothesis[J].Geochim Cosmochim Acta,1990,54:1315~1323. [9] 张敏,张俊.塔中地区不同Mango轻烃参数原油的地球化学特征[J].断块油气田,1999,7(1):14~17. [10] 朱扬明,张春明.Mango轻烃参数在塔里木原油分类中的应用[J].地球化学,1999,28(1):26~33. [11] 张敏,张俊,徐中一.轻烃星图在石油勘探中的应用[J].石油勘探与开发,1998,25(2):30~33. [12] 张林晔,李钜源,李祥臣等.细菌降解气轻烃组成及气源对比[J].石油实验地质,1996,18(1):88~95. [13] 蒋启贵,陈伟钧,金聚畅等.岩石低沸点轻烃指纹分析方法研究[J].石油实验地质,2004,26(5):493~495
计量
- 文章访问数: 743
- HTML全文浏览量: 49
- PDF下载量: 315
- 被引次数: 0