辽西凹陷Z区东营组层序地层格架
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摘要
辽西凹陷Z区位于辽东湾海域西南部,已在古近系发现了绥中36-1亿吨级油田,展示了辽西南洼为富烃洼陷,具有巨大的油气勘探潜力。以古近系东营组为目标层系,综合分析全区的古生物、岩心、录井、测井及地震资料,将Z区东营组划分为3个三级层序,自下而上分别为SQd3、SQd2和SQd1,其中SQd3、SQd2均可进一步划分出湖扩域和高位域不同的层序界面在古生物、岩性、测井响应、地震反射特征上存在一定差异。构造—古地貌对层序具有明显的控制作用。在斜坡高部位和凸起区,东营组超覆于基岩之上,上覆馆陶组与东营组之间有明显的削截现象。东营组各三级层序内部,总体上表现出从水进到水退的沉积旋回,且具有不同的岩性、测井响应及地震反射特征。
Liaoxi depression is located in the southwest of Liaodong Bay,with Suizhong 36-1 oil field discovered in Paleogene of the southern Liaoxi depression(SLXD),which has hundred million tons of original oil in place(OOIP),indicating a great hydrocarbon potential in this area.Dongying Formation(Paleogene) is the main exploration targets in area Z of the southern Liaoxi depression.On the basis of the paleontological data,core,logging and seismic data,three sequences have been distinguished in Dongying Formation from bottom to top,including SQd3,SQd2 and SQd1,of which SQd3 & SQd2 can be divided further into lacustrine-expanded systems tract and highstand system tract.Various sequence interfaces are different in the characteristics of paleontology,lithology, log responses and seismic reflection.The stratigraphic sequences and sedimentary systems are controlled obviously by the structures and paleogeomorphy.At the upland of slope and the uplifted area,Dongying Formation overlays on the basement rock,and truncation occurred between Dongying Formation and the overlying Guantao Formation.Within orderⅢsequence of Dongying formation, transgressive to regressive sedimentary cycles deposited,with obvious different lithology,log responses and seismic reflection characteristics.
Liaoxi depression is located in the southwest of Liaodong Bay,with Suizhong 36-1 oil field discovered in Paleogene of the southern Liaoxi depression(SLXD),which has hundred million tons of original oil in place(OOIP),indicating a great hydrocarbon potential in this area.Dongying Formation(Paleogene) is the main exploration targets in area Z of the southern Liaoxi depression.On the basis of the paleontological data,core,logging and seismic data,three sequences have been distinguished in Dongying Formation from bottom to top,including SQd3,SQd2 and SQd1,of which SQd3 & SQd2 can be divided further into lacustrine-expanded systems tract and highstand system tract.Various sequence interfaces are different in the characteristics of paleontology,lithology, log responses and seismic reflection.The stratigraphic sequences and sedimentary systems are controlled obviously by the structures and paleogeomorphy.At the upland of slope and the uplifted area,Dongying Formation overlays on the basement rock,and truncation occurred between Dongying Formation and the overlying Guantao Formation.Within orderⅢsequence of Dongying formation, transgressive to regressive sedimentary cycles deposited,with obvious different lithology,log responses and seismic reflection characteristics.
引文
[1]戴俊生,陆克政,漆家福,等.渤海湾盆地早第三纪构造样式的演化[J].石油学报,1998,1(4):16-20.
[2]加东辉,徐长贵,杨波,等.辽东湾辽东带中南部古近纪古地貌恢复和演化及其对沉积体系的控制[J].古地理学报, 2007,9(2):155-166.
[3]李军,王燮培.渤海湾盆地构造格架及演化[J].石油与天然气地质,1998,19(1):63-67.
[4]徐长贵,许效松,丘东洲,等.辽东湾地区辽西凹陷中南部古近系构造格架与层序地层格架及古地理分析[J].古地理学报,2005,7(4):50-459.
[5]薛叔浩,刘雯林,薛良清,等.湖盆沉积地质与油气勘探[M].北京:石油工业出版社,2002.
[6]顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4):6-11.
[7]吴青鹏,杨占龙,李红哲.吐哈盆地台北凹陷西缘侏罗系层序划分及沉积体系演化[J].天然气地球科学,2009, 20(3):349-355.
[8]朱筱敏.层序地层学[M].山东:中国石油大学出版社, 1999:11-41,109-146.
[9]李思田,杨士恭,林畅松.论沉积盆地的等时地层格架和基本建造单元[J].沉积学报,1992,10(4):11-21.
[10]邓宏文,王红亮,李熙哲.层序地层学基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
[11]Vail P R.Seismic stratigraphy Interpretation Using Sequence Stratigraphy PartⅠ:Seismic Stratigraphy Interpretation Procedure in Bally A W,Ed Atlas of Seismic Stratigraphy[J].AAPG,Studies in Geology,1987,27:1-10.
[12]李思田,潘元林,陆永潮.断陷湖盆隐蔽油气藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J].地球科学,2002,27(5):593-598.
[13]Cross T A.Stratigraphic controls on reservoir attributes in continental strata[J].Earth Science Frontiers,2000,7(4):322-350.
[2]加东辉,徐长贵,杨波,等.辽东湾辽东带中南部古近纪古地貌恢复和演化及其对沉积体系的控制[J].古地理学报, 2007,9(2):155-166.
[3]李军,王燮培.渤海湾盆地构造格架及演化[J].石油与天然气地质,1998,19(1):63-67.
[4]徐长贵,许效松,丘东洲,等.辽东湾地区辽西凹陷中南部古近系构造格架与层序地层格架及古地理分析[J].古地理学报,2005,7(4):50-459.
[5]薛叔浩,刘雯林,薛良清,等.湖盆沉积地质与油气勘探[M].北京:石油工业出版社,2002.
[6]顾家裕.陆相盆地层序地层学格架概念及模式[J].石油勘探与开发,1995,22(4):6-11.
[7]吴青鹏,杨占龙,李红哲.吐哈盆地台北凹陷西缘侏罗系层序划分及沉积体系演化[J].天然气地球科学,2009, 20(3):349-355.
[8]朱筱敏.层序地层学[M].山东:中国石油大学出版社, 1999:11-41,109-146.
[9]李思田,杨士恭,林畅松.论沉积盆地的等时地层格架和基本建造单元[J].沉积学报,1992,10(4):11-21.
[10]邓宏文,王红亮,李熙哲.层序地层学基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
[11]Vail P R.Seismic stratigraphy Interpretation Using Sequence Stratigraphy PartⅠ:Seismic Stratigraphy Interpretation Procedure in Bally A W,Ed Atlas of Seismic Stratigraphy[J].AAPG,Studies in Geology,1987,27:1-10.
[12]李思田,潘元林,陆永潮.断陷湖盆隐蔽油气藏预测及勘探的关键技术——高精度地震探测基础上的层序地层学研究[J].地球科学,2002,27(5):593-598.
[13]Cross T A.Stratigraphic controls on reservoir attributes in continental strata[J].Earth Science Frontiers,2000,7(4):322-350.
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