巴西桑托斯盆地S油田火成岩地震预测
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摘要
巴西桑托斯盆地S油田目的层为盐下碳酸盐岩储层,由于受到火成岩的影响,碳酸盐岩储层预测比较困难,影响井位部署。通过钻井、测井和岩心资料分析,明确了S油田发育两种类型的火成岩:喷发岩(主要是玄武岩)和侵入岩(主要是辉绿岩)。剖面上根据地震相特征,将喷发岩地震相分为空白相、弱反射相和杂乱发射相,分别对应火山岩通道相、爆发相和溢流相,侵入岩相以片状强反射为特征;平面上时间厚度和均方根振幅能够准确地刻画侵入岩分布范围,而时间切片则能够较好预测火山口发育位置。分析认为,火成岩形成与分布均与断裂密切相关,近断层分布,距断层越近厚度越大。该研究成果为研究区目标评价和井位优选提供借鉴。
Target stratum of S oil field,Santos Basin,Brazil were presalt carbonate reservoir.It was difficult to predict the carbonate reservoir affected by igneous rock,having a bad effect on well location decision.Through drilling,logging and core data analysis,two types of igneous rocks were identified in the S field:extrusive and intrusive rocks.The extrusive rocks were mainly basalts,and the intrusive rocks were mainly diabases.According to the characteristics of their seismic facies on the section,the extrusive rocks were divided into blank facies,weak reflection facies and chaos reflection facies,which correspond to the volcanic channel facies,eruptive facies and overflow facies respectively.The intrusive rocks were characterized by flaky strong reflection.The time thickness and RMS amplitude can accurately describe the distribution of the intrusive rocks,and the time slice can predict the location of the crater.It was concluded that the development and distribution of igneous rocks are closely related to the faults,and they scattered near faults.The closer the fault was,the greater the thickness.The results of the study could effectively guide the target evaluation and well location optimization in the study area.
Target stratum of S oil field,Santos Basin,Brazil were presalt carbonate reservoir.It was difficult to predict the carbonate reservoir affected by igneous rock,having a bad effect on well location decision.Through drilling,logging and core data analysis,two types of igneous rocks were identified in the S field:extrusive and intrusive rocks.The extrusive rocks were mainly basalts,and the intrusive rocks were mainly diabases.According to the characteristics of their seismic facies on the section,the extrusive rocks were divided into blank facies,weak reflection facies and chaos reflection facies,which correspond to the volcanic channel facies,eruptive facies and overflow facies respectively.The intrusive rocks were characterized by flaky strong reflection.The time thickness and RMS amplitude can accurately describe the distribution of the intrusive rocks,and the time slice can predict the location of the crater.It was concluded that the development and distribution of igneous rocks are closely related to the faults,and they scattered near faults.The closer the fault was,the greater the thickness.The results of the study could effectively guide the target evaluation and well location optimization in the study area.
引文
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[16]SE′RGIO GOULART OREIRO,JOSE′ANTO?NIO CUPERTINO,PETER SZATMARI.Influence of pre-salt alignments in post-Aptian magmatism in the Cabo Frio High and its surroundings,Santos and Campos basins,SE Brazil:An example of non-plumerelated magmatism[J].Journal of South American Earth Sciences,2008,25:116-131.
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[18]蔡周荣,夏斌,郭峰,等.松辽盆地北部徐家围子断陷营城组火山岩受控机制分析[J].石油学报,2010,31(6):941-945.CAI Z R,XIA B,GUO F,et al.Controlling mechanism on volcanic rocks of the Yingcheng Formation of the Xujiaweizi rift depression in the northern Songliao basin[J].Acta Petrolei Sinica,2010,31(6):941-945.(In Chinese)
[2]康洪全,程涛,李明刚,等.巴西桑托斯盆地油气成藏特征及主控因素分析[J].中国海上油气,2016,28(4):1-8.KANG H Q,CHENG T,LI M G,et al.Characteristics and main control factors of hydrocarbon accumulation in Santos basin,Brazil[J].China Offshore Oil and Gas,2016,28(4):1-8.(In Chinese)
[3]张金虎,金春爽,祁昭林,等.巴西深水含油气盆地石油地质特征及勘探方向[J].海洋地质前沿,2016,32(6):23-31.ZHANG J H,JIN C S,QI Z L,et al.Petroleum geology and future exploration in deep-water basin of Brazil[J].Marine Geology Frontiers,2016,32(6):23-31.(In Chinese)
[4]王颖,王晓州,廖计华,等.巴西桑托斯盆地白垩系湖相藻叠层石礁特征及主控因素分析[J].沉积学报,2016,34(5):819-829.WANG Y,WANG X Z,LIAO J H,et al.Cretaceous lacustrine algal stromatolite reef characteristics and controlling Factors,Santos basin,Brazil[J].Acta Sedimentologica Sinica,2016,34(5):819-829.(In Chinese)
[5] MATIAS H C,NINCI B,GUANGSHENG X,et al.Unlocking pandora-insights from pre-salt reservoirs in campos and santos basins(offshore brazil)[C].77th EAGE Conference and Exhibition 2015.
[6] MEISLING K E,COBBOLD P R,MOUNT V S.Segmentation of an obliquely rifted margin,Campos and Santos basins,southeastern Brazil[J].AAPG Bulletin,2011,85(11):1903-1924.
[7] W.MOHRIAK,M.NEMCOK,G.ENCISO.South atlantic divergent margin evolution:rift-border uplift and salt tectonics in the basins of SE Brazil[J].Geological Society,London,Special Publications,2008,294:365-398.
[8]邓超,白国平,仲米虹.巴西桑托斯盆地含油气系统划分与评价[J].海相油气地质,2014,19(3):35-42.DENG C,BAI G P,ZHONG M H,et al.Division and evaluation of petroleum systems in the santos basin,Brazil[J]. Marine origin petroleum geology,2014,19(3):35-42.(In Chinese)
[9]何娟,何登发,李顺利,等.南大西洋被动大陆边缘盆地大油气田形成条件与分布规律-以巴西桑托斯盆地为例[J].中国石油勘探,2011(3):57-67.HE J,HE D F,LI S L,et al.The formation condition and distribution law of large oil-gas fields in passive continental margin basins,south atlantic ocean-a case study of Santos basin,Brazil[J].China petroleum exploration,2011(3):57-67.(In Chinese)
[10]熊利平,邬长武,郭永强.巴西海上坎波与桑托斯盆地油气成藏特征对比研究[J].石油实验地质.2013,35(4):419-425.XIONG L P,WU C W,GUO Y Q.Petroleum accumulation characteristics in Campos and Santos baisn,offshore Brazil[J].Petroleum Geology and Exprement,2013,35(4):419-425.(In Chinese)
[11]陈凯,康洪泉,吴景富,等.巴西桑托斯盆地大型油气田富集主控因素[J].地质科技情报,2016,35(3):151-158.CHEN K,KANG H Q,WU J F,et.al.Enrichment main controlling factors of large oil-gas field in Santos basin,Brazil[J].Geological Science and Technology Information,2016,35(3):151-158.(In Chinese)
[12]W.MOHRIAK.Salt tectonics,volcanic centers,fracture zones and their relationship with the origin and evolution of the South Atlantic Ocean:geophysical evidence in the Brazilian and West African margins[C].7th International Congress of the Brazilian Geophysical Society,2001:1594-1600.
[13]GOMES,P.O.,PARRY,J.&MARTINS,W..The outer high of the Santos basin,southern sao paulo plateau,Brazil:tectonic setting,relation to volcanic events and some comments on hydrocarbon potential[C].AAPG International Conference and Exhibition.2008:1-8.
[14]SZATMARI P,MOHRIAK W U.Plate model of post-breakup tectono-magmatic activity in SE Brazil and the adjacent Atlantic[J].V Simpósio Nacional de Estudos Tect8nicos–SNET,1995(95):19-22.
[15]ELIANE GUEDES,MONICA HEILBRON,PAULO M.VASCONCELOS,et al.K–Ar and 40Ar/39Ar ages of dikes emplaced in the onshore basement of the Santos basin,Resende area,SE Brazil:implicationsfor the south atlantic opening and Tertiary reactivation[J].Journal of South American Earth Sciences,2005,18(3-4):371-382.
[16]SE′RGIO GOULART OREIRO,JOSE′ANTO?NIO CUPERTINO,PETER SZATMARI.Influence of pre-salt alignments in post-Aptian magmatism in the Cabo Frio High and its surroundings,Santos and Campos basins,SE Brazil:An example of non-plumerelated magmatism[J].Journal of South American Earth Sciences,2008,25:116-131.
[17]王岩泉,胡大千,蔡国刚,等.辽河盆地东部凹陷火山岩储层特征与主控因素[J].石油学报,2013,34(5):896-940.WANG Y Q,HU D Q,CAI G G,et al.Characteristics and controlling factors of Cenozoic volcanic reservoirs in Liaohe basin,NE China[J].acta petrolei sinica,2013,34(5):896-940.(In Chinese)
[18]蔡周荣,夏斌,郭峰,等.松辽盆地北部徐家围子断陷营城组火山岩受控机制分析[J].石油学报,2010,31(6):941-945.CAI Z R,XIA B,GUO F,et al.Controlling mechanism on volcanic rocks of the Yingcheng Formation of the Xujiaweizi rift depression in the northern Songliao basin[J].Acta Petrolei Sinica,2010,31(6):941-945.(In Chinese)