鄂尔多斯盆地姬塬地区上三叠统延长组第六段高分辨率层序—岩相古地理
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摘要
姬塬地区处于鄂尔多斯盆地西部地区,晚三叠世延长期该地区处在北部的安边三角洲与西部的环县三角洲交汇部位。以高分辨率层序分析为指导思想,通过钻井岩芯、测井资料和地震等资料,分析该地区延长组长油层组多级次基准面旋回界面和湖泛面的成因类型及高分辨率层序地层学特征,将长6段河控三角洲沉积划分为1个长期、3个中期、10个短期和20个超短期旋回层序,比较了各级次层序的结构类型、叠加样式和分布模式,建立了等时地层对比格架,分析了砂岩在层序地层格架中的发育状况,编制了短期、超短期旋回相域的层序—岩相古地理图,描述了不同时期三角洲砂体的展布特征,对有利储层发育层位和区带进行了预测。
The Jiyuan region is located in the western Ordos Basin where the Anbian delta in the north and the Huanxian delta in the west of the basin converged during theLate Triassic.Through a comprehensive analysis of cores,well logs and seismic interpretation data,and using the principles of high-resolution sequence stratigraphy,the characteristics of multi-order sequence boundaries and lacustrine flooding surfaces in the Interval 6 of the Yanchang Formation in the studied area are documented.This interval includes 20 supershort-term,10 short-term,three middle-term cycles,and one long-term cycle.On the basis of these data,the architecture,stacking pattern and the distribution of different sequences are discussed in detail.According to the high-resolution chronostratigraphic correlation of the boundaries of base-level changes,the sequence stratigraphic and chronostratigraphic framework have been established on the scale of supershort-term base-level cycle.The results are useful in hydrocarbon exploration,particularly in the stratigraphic correlation of small sandstone horizons.
The Jiyuan region is located in the western Ordos Basin where the Anbian delta in the north and the Huanxian delta in the west of the basin converged during theLate Triassic.Through a comprehensive analysis of cores,well logs and seismic interpretation data,and using the principles of high-resolution sequence stratigraphy,the characteristics of multi-order sequence boundaries and lacustrine flooding surfaces in the Interval 6 of the Yanchang Formation in the studied area are documented.This interval includes 20 supershort-term,10 short-term,three middle-term cycles,and one long-term cycle.On the basis of these data,the architecture,stacking pattern and the distribution of different sequences are discussed in detail.According to the high-resolution chronostratigraphic correlation of the boundaries of base-level changes,the sequence stratigraphic and chronostratigraphic framework have been established on the scale of supershort-term base-level cycle.The results are useful in hydrocarbon exploration,particularly in the stratigraphic correlation of small sandstone horizons.
引文
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宋凯,吕剑文,杜金良,王宏科.2002.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系.古地理学报,4(3):59—66
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郑荣才,彭军.2002.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比.沉积学报,20(1):92—100
郑荣才,彭军,高红灿.2004.高分辨率层序分析在河流相砂体等时对比中的应用.成都理工大学学报(自然科学版),31(6):641—647
郑荣才,彭军,吴朝容.2001.陆相盆地基准面旋回的级次划分和研究意义.沉积学报,19(2):249—245
郑荣才,王昌勇,李虹,雷光明,谢春红.2007.鄂尔多斯盆地白豹—华池地区长6油层组物源区分析.岩性油气藏,1(1):32—39
郑荣才,尹世民,彭军.2000.基准面旋回结构与叠加样式的沉积动力学分析.沉积学报,18(3):369—375
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Lin Hong-bin&Yao Jing-li.2000.Depositional feature and materialsource analysis of Yanchang Formationin Ordos Basin.Journalof Xi’an Petroleum University,15(5):7—9
Song Kai,LüJian-wen,Du Jin-liang&Wang Hong-ke.2002Source direction analysis and delta depositional systems of Yan-chang Formation of the Upper Triassic in the central Ordos Ba-sin.Journal of Palaeogeography,4(3):59—66
Zhang Shang-feng,Hong Xiu-e,Zheng Rong-cai,Yi Hai-sheng,Zhang Chang-min&Dai Sheng-qun.2002.Application of high-resolution stratigraphic sequence to the analysis of level of res-ervoir flow units taking the Shuanghe Oil Field in Biyang De-pression for an example.Journal of Chengdu University ofTechnology,29(2):147—151
Zheng Rong-cai&Peng Jun.2002.Analysis and isochronostrati-graphic correlation of high-resolution sequence stratigraphy forInterval6of Yanchang Formationin Zhidan Delta,northern Or-dos Basin.Acta Sedimentologica Sinica,20(1):92—100
Zheng Rong-cai,Peng Jun&Gao Hong-chan.2004.Isochronic cor-relation of fluvial sandbodies by high-resolution sequence tech-nique.Journal of Chengdu University of Technology(Science&Technology Edition),31(6):641—647
Zheng Rong-cai,Peng Jun&Wu Chao-rong.2001.Grade divisionof base-level cycles of terrigenous basin and its implications.Acta Sedimentologica Sinica,19(2):249—255
Zheng Rong-cai,Wang Chang-yong,Li Hong,Lei Guang-ming&Xie Chun-hong.2007.Provenance analysis of the Chang-6paysets of the Yanchang Formationin Baibao-Huaci regionin OrdosBasin.Lithologic Reservoirs,1(1):32—39
Zheng Rong-cai,Yin Shi-min&Peng Jun.2000.Sedimentary dy-namic analysis of sequence structure and stacking pattern ofbase-level cycle.Acta Sedimentologica Sinica,18(3):369—375
蔺宏斌,姚径利.2000.鄂尔多斯盆地南部延长组沉积特性与物源探讨.西安石油学院学报,15(5):7—9
宋凯,吕剑文,杜金良,王宏科.2002.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系.古地理学报,4(3):59—66
张尚锋,洪秀娥,郑荣才,伊海生,张昌民,戴胜群.2002.应用高分辨率层序地层学对储层流动单元层次性进行分析——以泌阳凹陷双河油田为例.成都理工学院学报,29(2):147—151
郑荣才,彭军.2002.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比.沉积学报,20(1):92—100
郑荣才,彭军,高红灿.2004.高分辨率层序分析在河流相砂体等时对比中的应用.成都理工大学学报(自然科学版),31(6):641—647
郑荣才,彭军,吴朝容.2001.陆相盆地基准面旋回的级次划分和研究意义.沉积学报,19(2):249—245
郑荣才,王昌勇,李虹,雷光明,谢春红.2007.鄂尔多斯盆地白豹—华池地区长6油层组物源区分析.岩性油气藏,1(1):32—39
郑荣才,尹世民,彭军.2000.基准面旋回结构与叠加样式的沉积动力学分析.沉积学报,18(3):369—375
Cross T A&Lessenger M A.1996.Sediment volume partitioning:rationale for stratigraphic model evaluation and high-resolutionstratigraphic correlation.Norwegian Petroleums-Forening Con-ference Volume,1996,July.1—24
Lin Hong-bin&Yao Jing-li.2000.Depositional feature and materialsource analysis of Yanchang Formationin Ordos Basin.Journalof Xi’an Petroleum University,15(5):7—9
Song Kai,LüJian-wen,Du Jin-liang&Wang Hong-ke.2002Source direction analysis and delta depositional systems of Yan-chang Formation of the Upper Triassic in the central Ordos Ba-sin.Journal of Palaeogeography,4(3):59—66
Zhang Shang-feng,Hong Xiu-e,Zheng Rong-cai,Yi Hai-sheng,Zhang Chang-min&Dai Sheng-qun.2002.Application of high-resolution stratigraphic sequence to the analysis of level of res-ervoir flow units taking the Shuanghe Oil Field in Biyang De-pression for an example.Journal of Chengdu University ofTechnology,29(2):147—151
Zheng Rong-cai&Peng Jun.2002.Analysis and isochronostrati-graphic correlation of high-resolution sequence stratigraphy forInterval6of Yanchang Formationin Zhidan Delta,northern Or-dos Basin.Acta Sedimentologica Sinica,20(1):92—100
Zheng Rong-cai,Peng Jun&Gao Hong-chan.2004.Isochronic cor-relation of fluvial sandbodies by high-resolution sequence tech-nique.Journal of Chengdu University of Technology(Science&Technology Edition),31(6):641—647
Zheng Rong-cai,Peng Jun&Wu Chao-rong.2001.Grade divisionof base-level cycles of terrigenous basin and its implications.Acta Sedimentologica Sinica,19(2):249—255
Zheng Rong-cai,Wang Chang-yong,Li Hong,Lei Guang-ming&Xie Chun-hong.2007.Provenance analysis of the Chang-6paysets of the Yanchang Formationin Baibao-Huaci regionin OrdosBasin.Lithologic Reservoirs,1(1):32—39
Zheng Rong-cai,Yin Shi-min&Peng Jun.2000.Sedimentary dy-namic analysis of sequence structure and stacking pattern ofbase-level cycle.Acta Sedimentologica Sinica,18(3):369—375
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