方正断陷下第三系新安村+乌云组层序特征研究
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摘要
本文以层序地层学和沉积学理论为指导,应用地震、测井、钻井等资料,总结方正断陷下第三系新安村+乌云组的层序识别与划分标志,建立层序地层格架。将下第三系新安村+乌云组分为两个三级层序。
根据地震地层学,利用地震反射终止识别出上超、下超、削截和下切谷等地震现象,识别出下切谷主要分布在T3和T5这两个不整合界面处,为沉积相带的划分提供一定的依据。
通过对岩心观察描述、录井和测井资料,结合地震资料分析得出,方正断陷三维区下第三系新安村+乌云组地层中,总结出研究区的沉积相为扇三角洲相,湖泊相和湖底扇相。并在研究区层序地层格架内,建立各沉积相的识别标志,进行平面相分析。
方正断陷新安村+乌云组有利区的预测结果显示出扇三角洲前缘为有利油气储集相带,其中水下分流河道最有利油气储集。综合分析其砂岩厚度、储层物性、地化指标等认为方正断陷研究区SQ1为最有利的储层。SQ1上发育有好的沉积相带类型,包括湖底扇和扇三角洲前缘,其上均具有良好的盖层体系,配合各类型的圈闭以及发育的断裂系统,是有利的勘探地层。
In this paper, it consists the theory of sequence stratigraphy and sedimentology theory, seismic, logging and drilling data. Then it has also summed the identification of sequence interfaces and the division signs of sequence stratigraphic units of the Xin'ancun group, And the same time it has established the sequence stratigraphic framework. The paper divides the Xin'ancun group in Eogene into two 3-order sequences.
According to seismic stratigraphy, seismic reflection termination identified on ultrasound, the next super, truncated and incised valley and other seismic phenomena, Incised valley identified mainly in the T3 and T5 at the interface of these two unconformities, sedimentary facies provide a basis for the division.
Combined sequence stratigraphy with oil and gas bearing relationship, it shows that:the depositional systems contains fan delta, lake system and the lake floor fan system in the main study area. And this paper has analysis the flat sedimentary faces. In this sequence stratigraphic framework, it establish a system of identification of the deposition, the phase of the plane.
Favorable area prediction results show that:fan delta front facies favorable oil and gas reservoirs, water diversion channel which is the most favorable oil and gas reservoirs. From the horizon point of view, The favorable area for oil and gas is Xin'ancun andWuyun Group. Comprehensive analysis of the sandstone thickness, reservoir properties, geochemical indicators that the most favorable reservoir SQ1. The development of a good type of sedimentary facies, including the lake floor fan and fan delta front is SQ1上. Its a good cover on both systems, with the development of various types of traps and the fracture system is conducive to exploration horizons.
根据地震地层学,利用地震反射终止识别出上超、下超、削截和下切谷等地震现象,识别出下切谷主要分布在T3和T5这两个不整合界面处,为沉积相带的划分提供一定的依据。
通过对岩心观察描述、录井和测井资料,结合地震资料分析得出,方正断陷三维区下第三系新安村+乌云组地层中,总结出研究区的沉积相为扇三角洲相,湖泊相和湖底扇相。并在研究区层序地层格架内,建立各沉积相的识别标志,进行平面相分析。
方正断陷新安村+乌云组有利区的预测结果显示出扇三角洲前缘为有利油气储集相带,其中水下分流河道最有利油气储集。综合分析其砂岩厚度、储层物性、地化指标等认为方正断陷研究区SQ1为最有利的储层。SQ1上发育有好的沉积相带类型,包括湖底扇和扇三角洲前缘,其上均具有良好的盖层体系,配合各类型的圈闭以及发育的断裂系统,是有利的勘探地层。
In this paper, it consists the theory of sequence stratigraphy and sedimentology theory, seismic, logging and drilling data. Then it has also summed the identification of sequence interfaces and the division signs of sequence stratigraphic units of the Xin'ancun group, And the same time it has established the sequence stratigraphic framework. The paper divides the Xin'ancun group in Eogene into two 3-order sequences.
According to seismic stratigraphy, seismic reflection termination identified on ultrasound, the next super, truncated and incised valley and other seismic phenomena, Incised valley identified mainly in the T3 and T5 at the interface of these two unconformities, sedimentary facies provide a basis for the division.
Combined sequence stratigraphy with oil and gas bearing relationship, it shows that:the depositional systems contains fan delta, lake system and the lake floor fan system in the main study area. And this paper has analysis the flat sedimentary faces. In this sequence stratigraphic framework, it establish a system of identification of the deposition, the phase of the plane.
Favorable area prediction results show that:fan delta front facies favorable oil and gas reservoirs, water diversion channel which is the most favorable oil and gas reservoirs. From the horizon point of view, The favorable area for oil and gas is Xin'ancun andWuyun Group. Comprehensive analysis of the sandstone thickness, reservoir properties, geochemical indicators that the most favorable reservoir SQ1. The development of a good type of sedimentary facies, including the lake floor fan and fan delta front is SQ1上. Its a good cover on both systems, with the development of various types of traps and the fracture system is conducive to exploration horizons.
引文
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[2]徐翔军.伊通地堑古近系层序地层学分析及重点区岩性地层圈闭分布规律[D].吉林大学,2007,1-4.
[3]Johnson J G,Sandberg C A,Devonian eustatic fluctuations in Eurameriea,Bul[J],Geol.Soc.America,1985,99:567-587.
[4]Embry A F.Transgressive-regressive(T-R) sequence analysis of the Jurassic sueeession of the Sverdrup Basin[J],Canadian Aretic Arehipelago,Can.J.Earth.Sci.1993,30:301-320.
[5]Wheeler H E.Baselevel,lithosphere surface and time-stratigraphy.Bull[J].Geol.Soc.America,1964,75:599-610.
[6]汪彦,彭军,游李伟,等.中国高分辨率层序地层学的研究现状[J].天然气地球科学,2005,16(3)：352-357.
[7]曾允孚,覃建雄.沉积学发展现状与前瞻[J].成都理工学院学报,1999,26(1):1-7.
[8]邓宏文.美国层序地层研究中的新学派高分辨率层序地层学[J].石油与天然气地质,1995,16(2)：89-97.
[9]刘文龙,唐振海,杨建国等.外围盆地评价优选及勘探部署研究[J],2003.
[10]张文昭.中国陆相盆地油气勘探实践[M].北京：石油工业出版社,1995.
[11]王孔伟,张帆,等.依舒地堑汤原、方正断陷古近纪边界断裂活动特征[J].大地构造与成矿学,2006,30(4)：445-454.
[12]顾家裕,范土芝.层序地层学回顾与展望[J].海相油气地质,2001,6(4)：15-25.
[13]纪友亮,张世奇,等.陆相断陷湖盆层序地层学[M].北京：石油工业出版社,1996.
[14]Vail P R.Seismic Stratigraphy Interpretation Using Sequence Stratigrapth,Part 1:Seismic Stratigraphy Interpretation Procedure,in A.W.Bally,ed.,Atlas of Seismic Stratigraphy[J]:AAPG Studies in Geology 27,1987,1:1-10.
[15]Vail P R.Seismic Stratigraphy Interpretation Using Sequence Stratigrapth,Part 1:Seismic Stratigraphy Interpretation Procedure,in A.W.Bally,ed.,Atlas of Seismic Stratigraphy[J]:AAPG Studies in Geology 27,1987,1:1-10.
[16]Vail P R,Audemard F,Bowman S A,et al.The stratigraphic signature of tectonics,eustasy and sedimentology-an overview [A].In:Einsele G,Ricken W,Seilacher A,eds.Cycles and events in stratigraphy [C].Berlin Heidelberg New York Springer-Verlag,1991,617-659.
[17]罗佳强,吴朝东.陆相含油气盆地中高勘探程度区油气精确勘探方法研究[J].地学前缘,2010,17(4)：241-250.
[18]康玉柱.中国油气地质新理论的建立[J].地质学报,2010,84(9)：1231-1272.
[19]吴因业,张天舒,张志杰,等.沉积体系域类型、特征及石油地质意义[J].古地理学报,2010,12(1)：69-81.
[20]朱筱敏,康安,等.陆相坳陷型和断陷型湖盆层序地层样式探讨[J].沉积学报,2003,21(6)：284-286.
[21]董艳蕾,朱筱敏,等.渤海湾盆地辽东湾地区古近系地震相研究[J].沉积学报,2007,25(4)：554-563
[22]马良,周江羽,等.伊通盆地岔路河断陷始新统地层对比[J].石油实验地质,2008,30(3)：260-269
[23]孙家振,李兰斌.地震地质综合解释教程[M].武汉：中国地质大学出版社,2002
[24]许杰,何治亮,等.塔里木盆地及周缘晚泥盆世沉积演化[J].石油实验地质,2008,30(6)：568-574.
[25]Magbagbeola O A, Willis. B J.Sequence st ratigraphy andsyndepositional deformation of the Agbada Formation, Rob2ert kiri field, Niger Delta, Nigeria [J]. AAPGBulletin, 2007,91 (7):945-958.
[26]王亚琳,杨贵丽,等.合肥侏罗纪盆地性质及其与大别造山带沉积响应[J].石油实验地质,2007,29(1)：57-62.
[27]陈新军,徐旭辉,等.松辽盆地十屋断陷层序地层研究[J].石油实验地,2007,29(5)：462-465.
[28]姜在兴,向树安,等.淀南地区古近系沙河街组层序地层模式[J].沉积学报,2009,27(5)：932-934.
[29]Van wagoner J C and Posamentier H W.An overview of the fundamentals of sequence stratigraphy and key definitions.In:Wilgus C K,et al.(eds), Sea-level changes:an integrated approach[J].SEPM Special Publication,1988,42:39-45.
[30]Van Wagoner J C,et al.Siliciclastic sequence stratigraphy in well logs.cores and outcrops:concepts for High-Resolution Correlation of Time and Facies[M].Published by The American Association of Petroleum Geologists,Oklahoma,USA,1990
[31]邓宏文.高分辨率层序地层学应用中的问题探析[J].古地理学报,2009,11(5):472-478.
[32]尹微,樊太亮,许浩等.下切谷的特征及油气地质意义[J].大庆石油地质与开发,2006,25(2)：21-24.
[33]杨道庆,邱荣华,赵追等.泌阳凹陷北坡下切谷—低位扇沉积体系及其油气勘探意义[J].石油地球物理勘探,2002,37(5)：485-490.
[34]Dalrymple R W, Boyd R, Zaitlin B A. History of research,types and internal organization of incised-valley systems:Introduction to the volume[A]. In:Dalrymple R W, Boyd R, Zait-lin B, et al, eds. Incised-valley systems:Origin and sedimentary sequences, SEPM special publication 51 [G]. Tulsa:SEPM,1994
[35]李涛,陆永潮,陈平,等.准噶尔盆地车排子地区下切谷的发现及其油气地质意义[J].石油实验地质,2008,30(4)：364-366.
[36]纪友亮,张世奇,张宏等.层序地层原理及层序成因机制模式[M].北京：地质出版社,1997.1-116.
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