准噶尔盆地腹部下侏罗统三工河组沉积体系
|
摘要
以岩心观察为基础,结合砂岩含量的变化及钻井、测井特征、地震反射等标志,总结了准噶尔盆地腹部侏罗系三工河组的沉积微相类型及相标志。指出,三工河组沉积时期砂体沉积微相的发育与分布主要受北东和北西方向物源体系的控制:由于不同沉积时期基准面与A/S比值的动态变化、物源体系特征及古地貌形态等的差异,导致了研究区东、西部沉积相类型及演化特征的差异;垂向上,沉积作用经历了由辫状河三角洲(扇三角洲)-曲流河三角洲-湖相的变化,其中三工河组中、晚期形成的三角洲前缘河口坝砂体和水下分支水道砂体是最重要的勘探目标。
This paper reviews the microfacies' type and markers of Jurassic Sangonghe formation in hinterland of Junggar Basin based on core observation and combining with the variation of sand percentage as well as drilling/logging features and seismic reflection indicators, and points out that the growth and distribution of the sand microfacies in Sangonghe stage are controlled by the depositional sources form both northeast and northwest directions. The changes of datum level and A/S ratio and the diversity of depositional source systems and paleo-relief cause the differences in sedimentary facies type and evolution characteristics of eastern and western parts of the study area. Vertically, the sedimentary facies has undergone the changes from braided river delta (fan delta) to meandering river delta to lacustrine facies, among which the mouth bar sands at the delta front formed in middle and late Sangonghe stage and those of underwater distributary channel are the most important targets for exploration.
This paper reviews the microfacies' type and markers of Jurassic Sangonghe formation in hinterland of Junggar Basin based on core observation and combining with the variation of sand percentage as well as drilling/logging features and seismic reflection indicators, and points out that the growth and distribution of the sand microfacies in Sangonghe stage are controlled by the depositional sources form both northeast and northwest directions. The changes of datum level and A/S ratio and the diversity of depositional source systems and paleo-relief cause the differences in sedimentary facies type and evolution characteristics of eastern and western parts of the study area. Vertically, the sedimentary facies has undergone the changes from braided river delta (fan delta) to meandering river delta to lacustrine facies, among which the mouth bar sands at the delta front formed in middle and late Sangonghe stage and those of underwater distributary channel are the most important targets for exploration.
引文
[1]王宜林,张义杰,王国辉,等.准噶尔盆地油气勘探开发成 果及前景[J].新疆石油地质,2002,23(6):449-455.
[2]王宜林,王英民,齐雪峰,等.准噶尔盆地侏罗系层序地层 划分[J].新疆石油地质,2001,22(5):382-385.
[3]杨文孝,赵铮亚.准噶尔盆地侏罗系勘探进展及成藏特征 [J].新疆石油地质,2002,23(6):466-469.
[4]李振宏,汤良杰,丁文龙,等.准噶尔盆地腹部地区断裂特 征分析[J].石油勘探与开发,2002,29(1):40-42.
[5]王英民,刘豪,王媛.准噶尔盆地侏罗系非构造圈闭 的勘探前景[J].石油勘探与开发,2002,29(1):44-46.
[6]杨永泰,王社教,培东宏,等.准噶尔盆地腹部深层成藏条 件及勘探领域分析[J].石油勘探与开发,2002,29(4): 32-34.
[7]张越迁,张年富,姚新玉.准噶尔盆地腹部油气勘探回顾 与展望[J].新疆石油地质,2000,21(2):105-109.
[2]王宜林,王英民,齐雪峰,等.准噶尔盆地侏罗系层序地层 划分[J].新疆石油地质,2001,22(5):382-385.
[3]杨文孝,赵铮亚.准噶尔盆地侏罗系勘探进展及成藏特征 [J].新疆石油地质,2002,23(6):466-469.
[4]李振宏,汤良杰,丁文龙,等.准噶尔盆地腹部地区断裂特 征分析[J].石油勘探与开发,2002,29(1):40-42.
[5]王英民,刘豪,王媛.准噶尔盆地侏罗系非构造圈闭 的勘探前景[J].石油勘探与开发,2002,29(1):44-46.
[6]杨永泰,王社教,培东宏,等.准噶尔盆地腹部深层成藏条 件及勘探领域分析[J].石油勘探与开发,2002,29(4): 32-34.
[7]张越迁,张年富,姚新玉.准噶尔盆地腹部油气勘探回顾 与展望[J].新疆石油地质,2000,21(2):105-109.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心