南美W油田T5B砂岩储层预测综合研究
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摘要
南美W油田T5B砂岩储层具有横向上岩性变化快、垂向上多套薄砂体叠置等特点,对其进行识别和描述难度较大。针对W油田7井区W-7KH井水平段钻探效果不理想以及W-7C井和W-7D井2口井油水关系矛盾等问题,提出了"平剖相结合"的储层预测技术思路。首先通过半定量地震振幅解释及叠后约束稀疏脉冲反演方法,建立了T5B砂岩储层厚度与地震均方根振幅的关系,并确定了储层与非储层纵波阻抗数值范围,较好地刻画了T5B砂岩储层的横向展布范围;然后采用高分辨率拟声波阻抗反演方法,有效识别了T5B砂岩内部薄泥岩隔层,描述了砂体的垂向叠置关系,解决了油水界面不统一的矛盾。研究思路和结果对油田下一步的滚动开发、水平井段设计及精细油藏描述具有启发和指导意义。
T5B sand reservoir in W oilfield of South America has the characteristics of rapid variation of lateral thickness and lithology and complicated vertical overlap relationship. Thus, it is very difficult to identify and characterize T5B sand. This paper carried out integrated researches including semi-quantitative analysis of the seismic RMS amplitude attribute, constrained sparse spike inversion and pseudo acoustic impedance inversion trying to resolve two specific problems such as poor drilling effect of W-7KH horizontal well and oil-water interface confliction between W-7C well and W-7D well. As a result, amplitude and impedance value of effective T5B sand has been established and the boundaries of T5B sand body have been characterized, and the overlap relationship of sand bodies have also been described so as to resolve the oil-water interface confliction of T5B sand between W-7C well and W-7D well. The research method and result may have good guidance for step out development, horizontal well design and fine reservoir characterization of W oilfield.
T5B sand reservoir in W oilfield of South America has the characteristics of rapid variation of lateral thickness and lithology and complicated vertical overlap relationship. Thus, it is very difficult to identify and characterize T5B sand. This paper carried out integrated researches including semi-quantitative analysis of the seismic RMS amplitude attribute, constrained sparse spike inversion and pseudo acoustic impedance inversion trying to resolve two specific problems such as poor drilling effect of W-7KH horizontal well and oil-water interface confliction between W-7C well and W-7D well. As a result, amplitude and impedance value of effective T5B sand has been established and the boundaries of T5B sand body have been characterized, and the overlap relationship of sand bodies have also been described so as to resolve the oil-water interface confliction of T5B sand between W-7C well and W-7D well. The research method and result may have good guidance for step out development, horizontal well design and fine reservoir characterization of W oilfield.
引文
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[18]甘利灯,戴晓峰,张昕,等.高含水油田地震油藏描述关键技术[J].石油勘探与开发,2012,39(3):365-377.
[2]朱毅秀,刘洛夫,金强.亚诺斯盆地油气地质特征及有利区带预测[J].新疆石油地质,2004,25(1):110-113.
[3]林水城,傅恒,达丽亚,等.哥伦比亚Llanos盆地中部始—中新统Carbonera组层序地层特征[J].物探化探计算技术,2013,35(1):79-85.
[4]边树涛,狄帮让,董艳蕾.地质统计反演在东濮凹陷白庙气田沙三段储层预测中的应用[J].石油地球物理勘探,2010,45(3):398-405.
[5]黄捍东,赵迪,任敦占,等.基于贝叶斯理论的薄层反演方法[J].石油地球物理勘探,2011,46(6):919-924.
[6]王玲,孙夕平,张妍,等.辨状河三角洲岩性油气藏储层描述配套技术研究———以留西构造带为例[J].石油地球物理勘探,2008,43(2):190-195.
[7]张国栋,刘萱,田丽花,等.综合应用地震属性与地震反演进行储层描述[J].石油地球物理勘探,2010,45(增刊1):137-144.
[8]李方明,计智锋,赵国良,等.地质统计反演之随机地震反演方法———以苏丹M盆地P油田为例[J].石油勘探与开发,2007,34(4):451-455.
[9]徐赢,覃新平,吴迪,等.基于模型地震反演储层预测技术的应用———以牛圈湖油田西山窑组为例[J].岩性油气藏,2012,24(4):85-89.
[10]张金伟,闫爱英,柳文秀,等.亚诺斯盆地Cabiona区块油气成藏规律[J].油气地质与采收率,2012,19(4):24-26.
[11]李国发,岳英,熊金良,等.基于三维模型的薄互层振幅属性实验研究[J].石油地球物理勘探,2011,46(1):115-120.
[12]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993:197-202.
[13]王旭松,钱雪峰,李波涛.第一菲涅尔带半径与地震资料的横向分辨力[J].勘探地球物理进展,2006,29(4):197-202.
[14]白焕新,俞寿鹏,刘洋.基于CMP理论的横向分辨率研究地球物理勘探[C]∥中国地球物理协会.中国地球物理学会第22届年会论文集,成都,2006.
[15]孙成禹.地震波理论与方法[M].东营:中国石油大学出版社,2007:197-202.
[16]潘昱杰,李大卫,杨锴.确定性反演和随机反演对井约束条件的需求分析[J].石油物探,2011,50(4):345-360.
[17]沈向存,杨江峰.声波曲线重构技术在地震反演中的应用[J].中国西部油气地质,2006,2(4):436-439.
[18]甘利灯,戴晓峰,张昕,等.高含水油田地震油藏描述关键技术[J].石油勘探与开发,2012,39(3):365-377.
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