基于高分辨率层序地层分析的古近系储层精细预测技术
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摘要
受埋藏深度以及复杂构造的影响,渤海湾盆地辽东湾坳陷旅大构造区东营组储层在横向和纵向上变化均较快,单一的地球物理方法存在较强的多解性。在实际工作基础上,建立了一套基于高分辨率层序地层分析的古近系储层精细预测技术。首先,通过层序地层分析和等时地层格架的建立,在宏观上识别出不同期次的沉积体,并确定各自的优势沉积中心;其次,结合地震相分析及正演模拟,总结出不同沉积微相对应的地震响应特征,分析表明,强振幅、低频、较连续反射为优质储层的典型特征;最后,根据不同相带的地震反射特征,优选能够反映富砂区反射规律的地震属性进行储层精细研究,实现储层边界由定性到半定量的刻画。研究结果表明,该方法在旅大构造区东三段储层预测中取得了较好的效果,且预测结果得到已钻井的证实,为该区后续的勘探开发工作提供了有力支撑。
Being influenced by buried depth and complex structures, the reservoirs within Dongying Group of Lyuda Structure in Bohai Bay Basin change quickly in both horizontal and vertical directions, which leads to strong uncertainty for geophysical methods. On the basis of practical work, a precise Palaeogene reservoir prediction technology based on high-resolution sequence stratigraphy analysis is proposed. Firstly, sedimentary bodies of different stages are identified and the corresponding depocenters are determined according to the isochronal stratigraphic framework. Secondly, seismic facies analysis and forward modeling are integrated to summarize the seismic responses of different sedimentary microfacies. Analysis indicates that quality reservoir presents as strong amplitude, low frequency and continuous reflection. Then, seismic attributes which can highlight the reflection of reservoirs are selected to conduct qualitative to semi-quantitative characterization of the reservoir distribution. Result shows that the method is well applied to the reservoir prediction of D3 Member in Lyuda tectonic region, which is confirmed by drilling outcomes and provides references for the subsequent exploration and development.
Being influenced by buried depth and complex structures, the reservoirs within Dongying Group of Lyuda Structure in Bohai Bay Basin change quickly in both horizontal and vertical directions, which leads to strong uncertainty for geophysical methods. On the basis of practical work, a precise Palaeogene reservoir prediction technology based on high-resolution sequence stratigraphy analysis is proposed. Firstly, sedimentary bodies of different stages are identified and the corresponding depocenters are determined according to the isochronal stratigraphic framework. Secondly, seismic facies analysis and forward modeling are integrated to summarize the seismic responses of different sedimentary microfacies. Analysis indicates that quality reservoir presents as strong amplitude, low frequency and continuous reflection. Then, seismic attributes which can highlight the reflection of reservoirs are selected to conduct qualitative to semi-quantitative characterization of the reservoir distribution. Result shows that the method is well applied to the reservoir prediction of D3 Member in Lyuda tectonic region, which is confirmed by drilling outcomes and provides references for the subsequent exploration and development.
引文
[1]汪佳蓓,黄捍东,张文珠.桑塔木地区三叠系深部地震薄储集层预测[J].断块油气田,2016,23(4):447-450.
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[12]佟斯琴,李斌,罗群,等.古龙南凹陷葡萄花油层储层层序地层及沉积体系研究[J].断块油气田,2014,21(6):686-691.
[13]王文飞.四川盆地东部中二叠统茅口组沉积与层序地层特征[J].断块油气田,2015,22(2):154-159.
[14]王燕,杨少春,温静,等.锦99块杜家台油层层序构型及其沉积演化[J].断块油气田,2016,23(1):11-15.
[15]蔡成国,赵迎月,顾汉明.塔河油田三叠系储层地震正演模拟及应用研究[J].石油天然气学报,2008,30(3):92-95.
[16]关达,张卫华,管路平,等.相控储层预测技术及其在大牛地气田D井区的应用[J].石油物探,2006,45(3):230-233.
[17]刘爱群,陈殿远,任科英.分频与波形聚类分析技术在莺歌海盆地中深层气田区的应用[J].地球物理学进展,2013,28(1):338-344.
[2]郭彦民,裴家学,赖鹏,等.陆西凹陷特殊储层地震预测方法探讨[J].断块油气田,2016,23(4):451-454.
[3]徐长贵,赖维成.渤海古近系中深层储层预测技术及其应用[J].中国海上油气,2005,17(4):231-236.
[4]蒋炼,曾驿,文晓涛,等.基于地震相分析的砂体储层厚度描述[J].断块油气田,2011,18(3):273-276.
[5]赖维成,徐长贵,于水,等.渤海海域地质-地球物理储层预测技术及其应用[J].中国海上油气,2006,18(4):217-222.
[6]李海涛,王立歆,董月昌,等.准噶尔盆地车排子地区地震资料属性多解性分析及对策研究[J].中国石油勘探,2010,4(11):65-70.
[7]李劲松,郑晓东,高志勇.高分辨率层序地层学在提高储集层预测精度中的应用[J].石油勘探与开发,2009,36(4):448-455.
[8]闫育英,赵希军,蔡军星.白音查干凹陷桑合地区高分辨率层序地层研究[J].断块油气田,2008,15(6):9-12.
[9]孙怡,林会喜,王红亮,等.埕岛东部东营组高分辨率层序地层学分析[J].断块油气田,2004,11(2):23-25.
[10]李德江,朱筱敏,董艳蕾,等.辽东湾坳陷古近系河街组层序地层分析[J].石油勘探与开发,2007,34(6):669-676.
[11]邓宏文,王红亮,CROSS T A等.高分辨率层序地层学原理及应用[M].北京:地质出版社,2002:3-22.
[12]佟斯琴,李斌,罗群,等.古龙南凹陷葡萄花油层储层层序地层及沉积体系研究[J].断块油气田,2014,21(6):686-691.
[13]王文飞.四川盆地东部中二叠统茅口组沉积与层序地层特征[J].断块油气田,2015,22(2):154-159.
[14]王燕,杨少春,温静,等.锦99块杜家台油层层序构型及其沉积演化[J].断块油气田,2016,23(1):11-15.
[15]蔡成国,赵迎月,顾汉明.塔河油田三叠系储层地震正演模拟及应用研究[J].石油天然气学报,2008,30(3):92-95.
[16]关达,张卫华,管路平,等.相控储层预测技术及其在大牛地气田D井区的应用[J].石油物探,2006,45(3):230-233.
[17]刘爱群,陈殿远,任科英.分频与波形聚类分析技术在莺歌海盆地中深层气田区的应用[J].地球物理学进展,2013,28(1):338-344.