多相干属性分析技术在断裂和裂缝识别中的应用——以松南气田营城组火山岩为例
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摘要
火山岩油气藏储层岩性复杂,非均质性强。自2006年以来,松辽盆地南部长岭断陷相继钻探腰深1、腰深101、腰深102、腰平1等井,证实该区深层断陷地层的火山岩是深层天然气的重要储层之一。松南气田地质条件复杂,营城组火山岩储层非均质性强,孔、洞、缝是火山岩气藏的主要储渗空间,裂缝的发育程度是决定油气产能高低的主要因素。通过对松南地区营城组火山岩野外露头、岩心观察描述,结合测井测试等综合研究,认为营城组火山岩裂缝以构造成因裂缝为主。针对研究区目的层裂缝特点,采用多相干属性分析技术,对地震资料进行相关处理,获得倾角体、方位角体和相干体等多种属性数据体,通过对倾角体、方位角体和相干体的联合显示,落实了研究区的微断裂及裂缝发育带,为该区开发井位部署奠定了基础,钻井验证吻合程度高。
The reservoirs have complex lithology and strong heterogeneity in the volcanic oil and gas reservoirs.Since 2006,well Yaoshen1,Yaoshen101,Yaoshen102 and Yaoping 1 have been drilled successively in Changling fault depression of the southern Songliao Basin,which proved that the volcanic rocks in deep fault depression formations of this area are one of the important reservoirs of natural gas in deep zones.The geological condition in Songnan gas field is complex.The volcanic reservoir of Yingcheng formation has strong heterogeneity with its pores,holes and fractures as main storage and permeation spaces.Growth degree of the fractures is the main influencing factor of oil-gas productivity.Through observation and description on the field outcrop and core,and the comprehensive research on logging and testing,it is considered that the fractures developed in Yingcheng formation are mainly tectogenetic fractures.According to the features of fractures in the study area,multi-coherence attributes analysis technique is applied to 3D seismic data process firstly,and then data volume of dip volume,azimuth volume and coherence volume and other attributes are gained.Through combined visualizing on the above three attributes,micro-fracture and fracture development zone in the study area are known of good matching with well data,which provide the solid foundation for production well arrangement.
The reservoirs have complex lithology and strong heterogeneity in the volcanic oil and gas reservoirs.Since 2006,well Yaoshen1,Yaoshen101,Yaoshen102 and Yaoping 1 have been drilled successively in Changling fault depression of the southern Songliao Basin,which proved that the volcanic rocks in deep fault depression formations of this area are one of the important reservoirs of natural gas in deep zones.The geological condition in Songnan gas field is complex.The volcanic reservoir of Yingcheng formation has strong heterogeneity with its pores,holes and fractures as main storage and permeation spaces.Growth degree of the fractures is the main influencing factor of oil-gas productivity.Through observation and description on the field outcrop and core,and the comprehensive research on logging and testing,it is considered that the fractures developed in Yingcheng formation are mainly tectogenetic fractures.According to the features of fractures in the study area,multi-coherence attributes analysis technique is applied to 3D seismic data process firstly,and then data volume of dip volume,azimuth volume and coherence volume and other attributes are gained.Through combined visualizing on the above three attributes,micro-fracture and fracture development zone in the study area are known of good matching with well data,which provide the solid foundation for production well arrangement.
引文
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[3]梁晓伟,韩永林,王海红,等.鄂尔多斯盆地姬塬地区上三叠统延长组裂缝特征及其地质意义[J].岩性油气藏,2009,21(2):49-52.
[4]张娟,周文,邓虎成,等.麻黄山地区延安组、延长组储层裂缝特征及识别[J].岩性油气藏,2009,21(4):53-57.
[5]焦里力,罗小平,李仲东,等.松南气田火山岩储层天然气地球化学特征及成因探讨[J].矿物岩石,2010,30(2):103-110.
[6]陈国利.松辽盆地南部天然气的分布特征[J].新疆石油地质,2003,24(6):520-522.
[7]赵政璋,赵贤正,王英民.储层地震预测理论与实践[M].北京:科学出版社,2005:230-238.
[8]王永刚,乐友喜,张华军.地震属性分析技术[M].东营:中国石油大学出版社,2007:208-218.
[9]姜秀清,夏斌,王千军,等.微构造的地震识别与应用效果[J].天然气工业,2006,26(2):57-59.
[10]王永刚,李振春,刘礼农,等.利用地震信息预测储层裂缝发育带[J].石油物探,2000,39(1):57-63.
[11]刘晓,蒋刚毅,吴训威.基于HSL空间的彩色形态变换[J].电路与系统学报,2002,7(1):52-56.
[12]BAHORICH M,FARMER S.3-D seismic discontinuity for faultand stratigraphic features:The coherence cube[J].The Lead-ing Edge,1995,14(10):1053-1058.
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