Distribution and characteristics of carbonate cements in overpressure zone of Junggar Basin
-
摘要: 利用镜下观察、测井解释及氧碳同位素分析等方法,在分析碳酸盐胶结物特征的基础上,探讨了准噶尔盆地南缘古近系安集海河组高压带内碳酸盐胶结层的分布及形成环境.安集海河组超压带砂岩碳酸盐胶结物主要为连晶状铁质亮晶方解石,胶结层具有低声波时差、较高电阻率、低自然伽马值等特征.纵向上,超压带内的钙质胶结层主要分布于压力释放带及超压过渡带,包括超压顶界上部和下部,超压带内砂岩发育段的顶部和厚层超压泥岩中的岩性过渡带.大部分胶结物具有氧同位素呈高负值的特征,是晚期较高温度环境下,先于或同时于油气运移期形成的.Abstract: Based on studies of carbonate cement characteristics,the distribution and generation environment of carbonate cements in overpressure zone of the Paleogene Anjihaihe Formation in the southern margin of Junggar Basin have been discussed in this paper by means of thin section observation,well-logging interpretation and O-C isotope analysis.The carbonate cements in the study area are mainly composed of sparry ferri-calcite in connected-crystal form,characterized by low AC,high RT and low GR.Vertically,the cemented layers mainly locate in the pressure-released zone and the overpressure transition zone,including the upper and the lower parts of overpressure top surface,the top of sandstone belt in the overpressure zone as well as the lithologic transition belt in thick overpressure mudstone.Most of the carbonate cements have high negative oxygen isotope values.They were formed before or during petroleum migration under high temperature.
-
Key words:
- carbon and oxygen isotope /
- carbonate cement /
- overpressure zone /
- Paleogene /
- Junggar Basin
-
[1] 雷德文,唐勇,常秋生.准噶尔盆地南缘深部优质储集层及有利勘探领域[J].新疆石油地质,2008,29(4):435-438. [2] 李耀华.准南前陆盆地油气成藏条件及有利勘探区[J].天然气工业,2002,22(S1):51-55. [3] 李忠权,张寿庭,王洪辉,等.准噶尔盆地南缘构造成因机理及其与油气聚集关系探讨[J].成都理工学院学报,1997,24(2):4-6. [4] 齐雪峰,吴晓智.准噶尔盆地南缘安集海河组沉积环境及油气地质意义[J].新疆石油地质,2009,30(3):289-292. [5] 李忠权,陈更生,郭冀义,等.准噶尔盆地南缘西部地层异常高压基本地质特征[J].石油实验地质,2001,23(1):47-51. [6] 查明,张卫海,曲江秀.准噶尔盆地异常高压特征、成因及勘探意义[J].石油勘探与开发,2000,27(2):31-35. [7] 张闻林,张哨楠,陈义才,等.准南西部地层超压分析[J].天然气工业,2004,24(1):26-29. [8] 王震亮,孙明亮,耿鹏,等.准南地区异常地层压力发育特征及形成机理[J].石油勘探与开发,2003,30(1):32-34. [9] 罗晓容,肖立新,李学义,等.准噶尔盆地南缘中段异常压力分布及影响因素[J].地球科学——中国地质大学学报,2004,29(4):404-413. [10] 陈丽华,姜再兴.储层实验测试技术[M].东营:石油大学出版社,1994:161-162. [11] Jansa L F,Noguera Urrea V H.Geology and diagenetic history of overpressured sandstone reservoirs,venture gas field,offshore Nova Scotia,Canada[J].AAPG Bulletin,1990,74(10):1640-1658. [12] 郭宏莉,王大锐.塔里木油气区砂岩储集层碳酸盐胶结物的同位素组成与成因分析[J].石油勘探与开发,1999,26(3):31-35. [13] Irwin H,Curtis C,Coleman M L.Isotopic evidence for source of diagenetic carbonates for med during burial of organic-rich sediments[J].Nature,1977,269:209-213. [14] Hutcheon I,Abercrombie H J,Putnam P E,et al.Diagenesis and sedimentology of the Glearwater Formation at Tucker Lake[J].Bulletin of Canadian Petroleum Geology,1989,37(1):83-97. -
计量
- 文章访问数: 1841
- HTML全文浏览量: 45
- PDF下载量: 1028
- 被引次数: 0