孔店油田馆陶组辫状河—曲流河转换及其控制因素
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摘要
为探讨孔店油田馆陶组河流类型的转换模式,在沉积学的理论指导下,通过对研究区岩心及测井资料的详细描述,在河流成因岩相类型识别的基础上,确定了6种沉积微相类型,并且通过对馆陶组地层垂向沉积微相、河道堆叠样式和河道宽厚比等的变化特征分析,确定了研究区发育辫状河和曲流河2种类型的河流,并建立了研究区的沉积模式;在此基础上,对河型转换的控制因素进行了分析。研究表明:基准面变化、物源供给及古气候3个因素控制着孔店油田馆陶组河流类型的转换过程。受到基准面的逐渐升高、物源供给能力的减弱及古气候环境变的干热等因素的影响,馆陶组沉积逐渐由辫状河体系向曲流河转换,最终建立了研究区河型演化模式。
In order to discuss the model of fluvial style transform of Guantao Formation in Kongdian Oilfield, based on the detailed description of core and logging data, under the guidance of the sedimentology theory, six sedimentary microfacies were identified by the identification of lithofacies. Through the analysis of the characteristics of variation on vertical sedimentary microfacies, stacking pattern and width-thickness ratio of channels of Guantao Formation, braided channel and meandering channel were identified and the sedimentary model was established in study area. The analysis of controlling factors on fluvial style transform shows that base-level changes, sediment supply and paleoclimate affected the fluvial styles of Guantao Formation in Kongdian Oilfield. With the rise of the base level, the weakened supply and the drying of paleoclimate, the fluvial style changed from braided river to meandering river and regional sedimentary evolution model was established.
In order to discuss the model of fluvial style transform of Guantao Formation in Kongdian Oilfield, based on the detailed description of core and logging data, under the guidance of the sedimentology theory, six sedimentary microfacies were identified by the identification of lithofacies. Through the analysis of the characteristics of variation on vertical sedimentary microfacies, stacking pattern and width-thickness ratio of channels of Guantao Formation, braided channel and meandering channel were identified and the sedimentary model was established in study area. The analysis of controlling factors on fluvial style transform shows that base-level changes, sediment supply and paleoclimate affected the fluvial styles of Guantao Formation in Kongdian Oilfield. With the rise of the base level, the weakened supply and the drying of paleoclimate, the fluvial style changed from braided river to meandering river and regional sedimentary evolution model was established.
引文
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[15]梅冥相,苏德辰.甘肃古浪河口群粗碎屑岩系的层序地层序列:祁连山白垩纪隆升的沉积学响应[J].地质论评,2014,60(3):541-554.
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[22]岳大力,赵俊威,温立峰.辫状河心滩内部夹层控制的剩余油分布物理模拟实验[J].地学前缘,2012,19(2):157-161.
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[2]ALLEN J P,FIELDING C R.Sedimentology and stratigraphic architecture of the late permian betts creek beds,queensland,Australia[J].Sediment Geology,2007,202:5-34.
[3]BRIDGE J S.Palaeochannel patterns inferred from alluvial deposits:a critical evaluation[J].Journal of Sedimentary Petrology,1985,55:579-89.
[4]HAMPSON G J,JEWELL T O,IRFAN N,et al.Modest change in fluvial style with varying accommodation in regressive alluvial-tocoastal-plain wedge:upper Cretaceous Blackhawk Formation,Wasatch Plateau,Central Utah,U.S.A[J].Journal of Sedimentary Research,2013,83(3):145-169.
[5]FOIX N,M PAREDES J,GIACOSA R E.Fluvial architecture variations linked to changes in accommodation space:río Chico Formation(late paleocene),Golfo San Jorge Basin,Argentina[J].Sedimentary Geology,2013,294(4):342-355.
[6]FOTHERBY L M.Valley confinement as a factor of braided river pattern for the Platte River[J].Geomorphology,2009,103:562-576.
[7]MARENSSI S A,LIMARINO C O,TRIPALDI A,et al.Fluvial systems variations in the Rio Leona Formation:tectonic and eustatic controls on the Oligocene evolution of the Austral(Magallanes)Basin,southernmost Argentina[J].Journal of South American Earth Science,2005,19:359-372.
[8]MIALL A D.Architectural-element analysis:a new method of facies analysis applied to fluvial deposits[J].Earth Science Reviews,1985,22:261-308.
[9]倪晋仁,王随继,王光谦.现代冲积河流的河型空间转化模式探讨[J].沉积学报,2000,18(1):1-6.
[10]谭程鹏,于兴河,李胜利,等.辫状河—曲流河转换模式探讨:以准噶尔盆地南缘头屯河组露头为例[J].沉积学报,2014,32(3):450-458.
[11]王燕,杨少春,温静,等.锦99块杜家台油层层序构型及其沉积演化[J].断块油气田,2016,23(1):11-15.
[12]王随继.大同盆地中侏罗世河流沉积体系及古河型演化[J].沉积学报,2001,19(4):501-505.
[13]何建新,黄浩,王新忠.塔里木河干流河型分类及判别模式研究[J].人民黄河,2009,31(8):18-22.
[14]廖保方,张为民,李列,等.辫状河现代沉积研究与相模式:中国永定河分析[J].沉积学报,1998,16(1):34-39.
[15]梅冥相,苏德辰.甘肃古浪河口群粗碎屑岩系的层序地层序列:祁连山白垩纪隆升的沉积学响应[J].地质论评,2014,60(3):541-554.
[16]王俊玲,任纪舜.嫩江下游现代河流沉积特征[J].地质论评,2001,47(2):193-199.
[17]王随继.黄河流域河型转化现象初探[J].地理科学进展,2008,27(2):10-17.
[18]王随继,倪晋仁,王光谦.古河型演化模式及其影响因素的沉积体系分析[J].石油勘探与开发,2000,27(5):102-105.
[19]侯加根,刘铭钰.黄骅坳陷孔店油田新近系馆陶组辫状河砂体构型及含油气性差异成因[J].古地理学报,2008,10(5):459-464.
[20]祁鹏,任建业.渤海湾盆地黄骅坳陷中北区新生代幕式沉降过程[J].地球科学,2010,35(6):1041-1051.
[21]叶琳,张俊霞.黄骅坳陷孔南地区古近纪构造:地层格架和幕式演化过程[J].地球科学,2013,8(2):379-389.
[22]岳大力,赵俊威,温立峰.辫状河心滩内部夹层控制的剩余油分布物理模拟实验[J].地学前缘,2012,19(2):157-161.
[23]李勇,廖前进,肖敦青,等.河流相层序地层学:以黄骅坳陷新近系为例[M].北京:科学出版社,2014:48-53.