塔河油田S75井区石炭系卡拉沙依组层序地层格架内的砂体展布
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摘要
基于传统的层序地层学理论,利用岩心、露头、测井和地震等资料,开展S75区石炭系卡拉沙依组层序地层格架研究。识别出各类层序边界与层序内部的初始海泛面和最大海泛面,对准层序进行识别和划分,将卡拉沙依组划分为3个三级层序,识别出低位体系域、海侵体系域和高位体系域。由于受多期河道砂体相互切割叠加的影响,卡拉沙依组SQ2和SQ3层序水下分流河道砂体的连通性较好,特别是SQ2层序三角洲前缘沉积时期。Csq1层序的垂向上可发育多个冲刷面,主要砂体发育在潮间带的潮道中;Csq2层序低位体系域砂体主要发育在扇三角洲分流河道,Csq2层序海侵体系域砂体主要在潮道和砂泥混合坪中发育;Csq3层序砂体主要在潮间带的潮道中发育。从卡拉沙依组3个层序的砂体发育演化来看,T806K～TK842井一带、TK711～TK729井一带及S75～TK736一带是研究区砂体发育较集中的区域。
Based on the traditional sequence stratigraphy theory,core,outcrop,well logging,seismic and other data were used,and the sequence stratigraphic framework study of Carboniferous Kalashayi Formation in S75 well area was carried out.The types of sequence boundaries,the first flooding surface and the maximum flooding surface were identified,the parasequence was identified and classified,Kalashayi Formation was divided into three third-order sequences,in which lowstand system tract,transgressive system tract and highstand system tract were identified.Due to the effect of multi-stage channel sand body cutting,the connectivity of the underwater distributary channel sand body in SQ2 and SQ3 sequences period is better,especially SQ2 delta front deposition period.The sand bodies in vertical direction of Csq1 sequence can develop some scour surfaces,the sand bodies are mainly developed in tidal channel of the intertidal.The sand bodies of Csq2 sequence lowstand system tract are mainly developed in fan delta branch river,the sand bodies of Csq2 sequence transgressive system tract are mainly developed in tidal channel sand and mud mixed flat.The sand bodies of Csq3 sequence are mainly developed in tidal channel of the intertidal zone.According to the sand bodies development and evolution of three sequences in Kalashayi Formation,T806K-TK842 well area,TK711-TK729 well area and S75-TK736 wells area are the sand bodies development concentration region.
Based on the traditional sequence stratigraphy theory,core,outcrop,well logging,seismic and other data were used,and the sequence stratigraphic framework study of Carboniferous Kalashayi Formation in S75 well area was carried out.The types of sequence boundaries,the first flooding surface and the maximum flooding surface were identified,the parasequence was identified and classified,Kalashayi Formation was divided into three third-order sequences,in which lowstand system tract,transgressive system tract and highstand system tract were identified.Due to the effect of multi-stage channel sand body cutting,the connectivity of the underwater distributary channel sand body in SQ2 and SQ3 sequences period is better,especially SQ2 delta front deposition period.The sand bodies in vertical direction of Csq1 sequence can develop some scour surfaces,the sand bodies are mainly developed in tidal channel of the intertidal.The sand bodies of Csq2 sequence lowstand system tract are mainly developed in fan delta branch river,the sand bodies of Csq2 sequence transgressive system tract are mainly developed in tidal channel sand and mud mixed flat.The sand bodies of Csq3 sequence are mainly developed in tidal channel of the intertidal zone.According to the sand bodies development and evolution of three sequences in Kalashayi Formation,T806K-TK842 well area,TK711-TK729 well area and S75-TK736 wells area are the sand bodies development concentration region.
引文
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[13]REYNOLDS A D.Dimensions of paralic sandstone bodies[J].Aapg Bulletin,1999,83(3):211-229.
[14]蒲仁海,党晓红,张惠,李艾红.钙质含量旋回在卡拉沙依组小层对比中的应用[J].地层学杂志,2005,29(3):264-269.PU Ren-hai,DANG Xiao-hong,ZHANG Hui,LI Ai-hong.Application of calcareous content allocycles to mini-layer correlation of the Kalashayi Formation[J].Journal of Stratigraphy,2005,29(3):264-269.
[15]STRECKER U W,STEIDTMANN J R,SMITHSON S B.A conceptual tectonostrtigraphic model for seismic facies migration in fluvial-lacustrine extensional basin[J].Aapg Bulletin,1999,83(2):43-61.
[2]何发岐,翟晓先,俞仁连,蒲仁海.塔河油田石炭系卡拉沙依组沉积与成因分析[J].石油与天然气地质,2004,25(3):258-262.HE Fa-qi,ZHAI Xiao-xian,YU Ren-lian,PU Ren-hai.Deposition and genetic analysis of Carboniferous Kalashayi Formation in Tahe oilfield[J].Oil and Gas Geology,2004,25(3):258-262.
[3]郭齐军,赵省民.塔河地区石炭系沉积特征[J].石油与天然气地质,2002,23(1):99-102.GUO Qi-jun,ZHAO Xing-min.Depositional characteristics of carboniferous in Tahe region[J].Oil and Gas Geology,2002,23(1):99-102.
[4]盛湘,何发岐,云露.塔河地区卡拉沙依组小层划分、连通性及油藏类型[J].石油与天然气地质,2009,30(2):143-148.SHENG Xiang,HE Fa-qi,YUN Lu.Subzone division,connectivity and pool types of the carboniferous Kalashayi formation in the Tahe area[J].Oil and Gas Geology,2009,30(2):143-148.
[5]VAIL P R,MITCHUM RM,THOMPSON S.Global cycles of relative changes of sea level[C]//Seismic Stratigraphy Association of Petroleum Geologists,1977:83-97.
[6]POSAMENTIER H W.Siliciclastic sequence stratigraphy and petroleum geology:Where to from here?[J].Aapg Bulletin,1993,77(5):731-742.
[7]BROWN A R,DAMB C G,GRAEBNER R J.A stratigraphic case history using three-dimensional seismic data in the Gulf of Thailand[J].Geophysical Prospecting,1981,29(3):327-349.
[8]NEMEC W,STEEL R J.Fan deltas:Sedimentology and tectonic settings[M].Berkeley:Blackie Press,1988:3-13.
[9]阎相宾,李永宏.塔河油田石炭系砂层划分对比及横向预测[J].勘探地球物理进展,2002,25(5):36-51.YAN Xiang-bin,LI Yong-hong.Division and lateral prediction of carboniferous and in Tahe oilfield[J].Progress in Exploration Geophysics,2002,25(5):36-51.
[10]张卫红,王瑞琪,关达.地震、测井联合反演在塔河油田石炭系储层预测中的应用[J].物探化探计算技术,2002,24(2):129-134.ZHANG Wei-hong,WANG Rui-qi,GUAN Da.An application of the combining inversion using seismic and logging in reservoir predication of carboniferous in Tahe oilfield[J].Computing Techniques for Geophysical and Geochemical Exploration,2002,24(2):129-134.
[11]沈武显,樊太亮,郭刚,高志前,宫雪.吐鲁番坳陷下侏罗统层序地层格架内有利储集砂体分布规律[J].中南大学学报:自然科学版,2009,40(6):1672-1678.SHEN Wu-xian,FAN Tai-liang,GUO Gang,GAO Zhi-qian,GONG Xue.Development of reservoir sandbody in sequence stratigraphic framework of middle-lower Jurassic in Turpan Sag[J].Journal of Central South University:Science and Technology,2009,40(6):1672-1678.
[12]樊太亮,吕延仓,丁明华.层序地层体制中的陆相储层发育规律[J].地学前缘,2000,7(4):315-321.FAN Tai-liang,LüYan-cang,DING Ming-hua.The regularities of formation and distribution of reservoirs in systems of continental sequence stratigraphy[J].Earth Science Frontiers,2000,7(4):315-321.
[13]REYNOLDS A D.Dimensions of paralic sandstone bodies[J].Aapg Bulletin,1999,83(3):211-229.
[14]蒲仁海,党晓红,张惠,李艾红.钙质含量旋回在卡拉沙依组小层对比中的应用[J].地层学杂志,2005,29(3):264-269.PU Ren-hai,DANG Xiao-hong,ZHANG Hui,LI Ai-hong.Application of calcareous content allocycles to mini-layer correlation of the Kalashayi Formation[J].Journal of Stratigraphy,2005,29(3):264-269.
[15]STRECKER U W,STEIDTMANN J R,SMITHSON S B.A conceptual tectonostrtigraphic model for seismic facies migration in fluvial-lacustrine extensional basin[J].Aapg Bulletin,1999,83(2):43-61.
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