松辽盆地北部西斜坡青二、三段四级层序C1水进域沉积微相特征
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摘要
为预测储层油气藏,综合岩心、录井、测井、地震、分析化验资料和古生物资料,应用沉积学、层序地层学、高分辨率地层学、地球物理学等理论和方法,对松辽盆地北部西斜坡青二、三段四级层序C1水进域进行了沉积体系、沉积相和沉积微相研究.结果表明:四级层序C1水进域相当于高台子油层四砂组上半部分,分布面积较广,平面上主要有三角洲相和湖泊相;北部和西南部边界地区发育了三角洲河口坝和远砂坝微相;西北部边界地区发育了长带状滨浅湖砂坝,其他地区发育大量的滨浅湖混合滩和零星点缀其中的滨浅湖砂坝及泥滩.这些砂体夹在上覆密集段泥岩和下伏层序密集段泥岩之间,是发育地层-岩性油气藏的有利场所.
To forecast hydrocarbon reservoir, studies have been carried out about the characteristics of sedimentary systems, sedimentary facies and sedimentary mocrofacies of the transgressive tract of the forth-grade sequence1 of section No.2 and section No.3 of Qingshankou Formation in the west clinoform region of north Songliao Basin. In the course of the research, we have applied synthetically the up to date theories and methods of sedimentography, sequence stratigraphy, high resolution sequences stratigraphy and geophysics, using cores, logging, well logging, seismics, analysis assay data and paleontology data. The transgressive tract of the forth-grade sequence1 corresponds to the upside part of the No.4 sand beds set of Gaotaizi reservoirs. The distribution area of the transgressive tract of the forth-grade sequence1 is relatively extended. It is mostly composed of delta facies and lacustrine facies in plane. It develops delta estuarine bar and distal end bar microfacies in its north and south-western boundary area. It develops long-zonary shore-shallow lacustrine sand bar with abundant shore-shallow lacustrine mixing beach sediment in most other area where it distributes sporadically shore-shallow lacustrine sand bar and muddy beach. These sandstone bodies are bedded in the middle of condensed sections of overlying rock and underlying sequence, which are advantaged development location of strata-lithology reservoirs.
To forecast hydrocarbon reservoir, studies have been carried out about the characteristics of sedimentary systems, sedimentary facies and sedimentary mocrofacies of the transgressive tract of the forth-grade sequence1 of section No.2 and section No.3 of Qingshankou Formation in the west clinoform region of north Songliao Basin. In the course of the research, we have applied synthetically the up to date theories and methods of sedimentography, sequence stratigraphy, high resolution sequences stratigraphy and geophysics, using cores, logging, well logging, seismics, analysis assay data and paleontology data. The transgressive tract of the forth-grade sequence1 corresponds to the upside part of the No.4 sand beds set of Gaotaizi reservoirs. The distribution area of the transgressive tract of the forth-grade sequence1 is relatively extended. It is mostly composed of delta facies and lacustrine facies in plane. It develops delta estuarine bar and distal end bar microfacies in its north and south-western boundary area. It develops long-zonary shore-shallow lacustrine sand bar with abundant shore-shallow lacustrine mixing beach sediment in most other area where it distributes sporadically shore-shallow lacustrine sand bar and muddy beach. These sandstone bodies are bedded in the middle of condensed sections of overlying rock and underlying sequence, which are advantaged development location of strata-lithology reservoirs.
引文
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[6]郭巍,刘招君,崔宝琛,等.松辽盆地西部斜坡区拗陷期层序地层发育控制因素分析[J].长春地质学院学报,1997,27(3):327-332.
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[9]张志坚,张国斌,佟卉,等.松辽盆地北部泰康地区青山口组一段沉积微相特征[J].大庆石油学院学报,2004,28(6):84-86.
[10]王平在,辛仁臣.松辽盆地北部徐家围子断陷沉积体系及其演化规律[J].大庆石油学院学报,2001,25(3):36-40.
[2]叶淑芬,魏魁生.松辽盆地白垩系的密集段及海水进侵的新证[J].地球科学,1996,21(3):267-271.
[3]高瑞祺,蔡希源.松辽盆地油气田形成条件与分布规律[M].北京:石油工业出版社,1997:103-106.
[4]魏魁生,叶淑芬,郭占谦,等.松辽盆地白垩系非海相沉积层序模式[J].沉积学报,1996,14(4):50-60.
[5]邹才能,薛叔浩,赵文智,等.松辽盆地南部白垩系泉头组-嫩江组积层序特征与地层2岩性油气藏形成条件[J].石油勘探与开发,2004,31(2):14-17.
[6]郭巍,刘招君,崔宝琛,等.松辽盆地西部斜坡区拗陷期层序地层发育控制因素分析[J].长春地质学院学报,1997,27(3):327-332.
[7]厉玉乐,张银国,陈建文.松辽盆地北部泰康-西超地区层序地层分析[J].石油实验地质,2003,25(6):694-700.
[8]田春志,辛仁臣,李慧勇.松辽盆地北部西部断陷沙河子组沉积特征[J].大庆石油学院学报,2002,26(2):1-4.
[9]张志坚,张国斌,佟卉,等.松辽盆地北部泰康地区青山口组一段沉积微相特征[J].大庆石油学院学报,2004,28(6):84-86.
[10]王平在,辛仁臣.松辽盆地北部徐家围子断陷沉积体系及其演化规律[J].大庆石油学院学报,2001,25(3):36-40.
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