高台子油田高45-16试验区扶杨油层砂体沉积微相研究
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摘要
大庆油田采油五厂的扶杨油层后备储量潜力大,但由于其河道发育规模小,平面砂体相变快,连通性差,纵向上河道砂单层砂体薄的特殊性,以及认识程度低、不精细,严重制约油气生产开发。针对以上不足,本文以扶杨油层发育较好的高台子油田高45-16试验区(以下简称研究区)作为研究对象,在前人成果基础上,结合已有的岩性、岩心资料,钻井资料,测井资料,三维地震资料,以沉积学、测井学、构造地质学、石油地质学等理论为指导,对研究区扶杨油层(主要是FⅠ、FⅡ、FⅢ和YⅠ)进行小层划分,开展研究区沉积微相系统研究工作,系统总结研究区各层段微相的平面展布特征。通过对研究区研究资料的解剖与分析,确定扶杨油层潜在油藏类型。
参考前人成果,以沉积学、层序地层学原理为依据,按照“旋回对比、分级控制,不同相待区别对待”的原则[14],利用层拉平技术,层控对比技术,实现目的储层划分与对比。将4个油层组划分为24各小层,进而细分为57个沉积时间单元。
通过岩电分析,重点进行岩心地质相、测井相分析及相模式建立,确定单井沉积微相,应用沉积体系及空间相模式理论进行平面沉积微相综合研究及单砂体识别[18],进一步揭示了沉积时间单元平面沉积微相、单砂体展布特征。
通过对目前已有资料解剖分析研究区目的层油水分布特征,确定目的层可能的油藏类型,分析有利油气分布的控制因素,预测有利区带。研究表明,分流河道砂体是本区有效储层。
Fuyang oil-bearing layer’s reservoirs is a major backup reserves resource for the fifth oil recovery factory of Daqing oil field.However,because of small scale of channel development,frequent facies changes,poor connectivity,small sequence thickness,and the low degree of geological knowledge,not accurate,according to defect above,in this paper,we carried out G45-16 test area researchment.Based on extensive collection of former data and information,combination with Lithology,core-drilling wells,logging,seismic data in G45-16 test area,and sedimentology,logging,structural geology,petroleum geology,as guides,Fuyang oil-bearing layer in this test area(mainly means FⅠ、FⅡ、FⅢandYⅠ)is divided into small layers,and the sedimentary microfacies is carried out,the platform distribution characteristics of sedimentary microfacies of each formation is summarized. Through the research and analysis on G45-16 block and the others founded by now,the potential oil and gas reservoir types are determined.
Reference for previous achievements,applying stratigraphic and sedimentologic theory,by combining sedimentary cycle correlation, hierarchical control and discriminating different sedimentary facies association[14], the four Reservoir Group in the research target was divided into twenty-four subbeds,and then subdivided into fifty-seven sedimentary units.
Through the contrast of electric proper and rocks,the establishment of core geologicalfacies,logging facies analysis and facies model,the determination of sedimentary microfacies of wells and the analysis on platform distribution characteristics of sedimentary microfacies are emphasized.
Through the research on this block and the others founded by now,analysis the distribution of the oil and gas,determine the accumulation models types of Fuyang and the connection between different microfacies,as well as the control factors of the favorable oil and gas accumulation block. The result of research shows the effective reservoir is the distributary channel above or below the water.
参考前人成果,以沉积学、层序地层学原理为依据,按照“旋回对比、分级控制,不同相待区别对待”的原则[14],利用层拉平技术,层控对比技术,实现目的储层划分与对比。将4个油层组划分为24各小层,进而细分为57个沉积时间单元。
通过岩电分析,重点进行岩心地质相、测井相分析及相模式建立,确定单井沉积微相,应用沉积体系及空间相模式理论进行平面沉积微相综合研究及单砂体识别[18],进一步揭示了沉积时间单元平面沉积微相、单砂体展布特征。
通过对目前已有资料解剖分析研究区目的层油水分布特征,确定目的层可能的油藏类型,分析有利油气分布的控制因素,预测有利区带。研究表明,分流河道砂体是本区有效储层。
Fuyang oil-bearing layer’s reservoirs is a major backup reserves resource for the fifth oil recovery factory of Daqing oil field.However,because of small scale of channel development,frequent facies changes,poor connectivity,small sequence thickness,and the low degree of geological knowledge,not accurate,according to defect above,in this paper,we carried out G45-16 test area researchment.Based on extensive collection of former data and information,combination with Lithology,core-drilling wells,logging,seismic data in G45-16 test area,and sedimentology,logging,structural geology,petroleum geology,as guides,Fuyang oil-bearing layer in this test area(mainly means FⅠ、FⅡ、FⅢandYⅠ)is divided into small layers,and the sedimentary microfacies is carried out,the platform distribution characteristics of sedimentary microfacies of each formation is summarized. Through the research and analysis on G45-16 block and the others founded by now,the potential oil and gas reservoir types are determined.
Reference for previous achievements,applying stratigraphic and sedimentologic theory,by combining sedimentary cycle correlation, hierarchical control and discriminating different sedimentary facies association[14], the four Reservoir Group in the research target was divided into twenty-four subbeds,and then subdivided into fifty-seven sedimentary units.
Through the contrast of electric proper and rocks,the establishment of core geologicalfacies,logging facies analysis and facies model,the determination of sedimentary microfacies of wells and the analysis on platform distribution characteristics of sedimentary microfacies are emphasized.
Through the research on this block and the others founded by now,analysis the distribution of the oil and gas,determine the accumulation models types of Fuyang and the connection between different microfacies,as well as the control factors of the favorable oil and gas accumulation block. The result of research shows the effective reservoir is the distributary channel above or below the water.
引文
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[5]Miall A D.Architeeture element analysis:a new method of facies analysis applied to fluvial deposits[J].Earth Seience Review,1985,22(4):261～308.
[6]Miall A D.Reservoir heterogeneities in fluvial sandstone:lessons from outcrop studies[J]. AAPG.,1988,72(6):682～697.
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[8]马世忠.松辽盆地河流—三角洲体系高分辨率层序地层学、储层构型及非均质模型研究[D].中国科学院研究生院,2003,3～28.
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[16]林会喜,郡继华,袁文芳,等.渤海湾盆地东营凹陷古近系沙河街组三段沉积相类型及平面分布特征[J].石油实验地质,2005,27(1):55～61.
[17]梁昌图,王志章,林承焰,等.松辽盆地扶余油田白里系泉四段沉积微相研究[J].西南石油大学学报(自然科学版),2008,30(2):69～73.
[18]李彦芳,曲淑琴,辛仁臣.松辽盆地三角洲与油气[M].北京:石油工业出版社,1993,54～72.
[19]隋军,吕小光,赵翰卿,等.大庆油田河流-三角洲相储层研究[M].北京:石油工业出版社,2000,14～80.
[20]楼章华,金爱民,孙毛明,等.松辽盆地北部东区扶杨油层地下水动力场演化与油气藏形成[J].天然气工业,2003,23(2),6～9.
[21]叶庆全.油气田开发地质[M].北京:石油工业出版社,1999,42～55,56～85.
[29]孙雨.松辽盆地红岗北地区扶余油层岩性油藏特征及控制因素分[J].沉积学报,2009,27(4):760～768.
[30]杜海峰,于兴河.松辽盆地高台子地区扶杨油层组岩心岩相及构形要素分析[J].岩性油气藏,2007,19(2):35～40.
[31]Doyle,J.D.and Sweet,M.L. Three-dimensional distribution of lithofacies, bounding surfaces, porosity, and permeability in a fluvial sandstone-Gypsy sandstone of Northern Oklahoma[J].AAPG, 1995,79(1):90-96.
[32]T.A.Cross.Stratigraphic Controls on Reservior Attributes in Continental Strata [J]. Earthscience frotiers,2000,7(4):322～350.
[33]穆龙新,贾爱林,陈亮,等.储层精细研究方法[M].北京:石油工业出版社,2000,122～142.
[34]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001,48～72,264～280.
[35]裘亦楠.开发地质方法论[J].石油勘探与开发,1996,23(2):43～47.
[36]赵澄林.沉积学原理[M].北京:石油工业出版社,2001,56～72,264～280.
[37]赵翰卿.高分辨率层序地层对比与我国的小层对比[J].大庆石油地质与开发,2005,24,(1):5～9.
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