陡坡带三角洲储层精细对比研究及应用——以J油田X区块东营组为例
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摘要
J油田X区块东营组储层为典型的陡坡带三角洲沉积,具有地层倾角大、储层厚度大、隔夹层多、断裂系统发育等特点。针对厚层稠油油藏特点,研究区采取大规模水平井细分层系方式进行开发,要求开展高精度的储层精细对比研究,指导开发层系划分及水平井实施。综合钻井、地震、测井等资料,进行古地貌恢复及标志层选取,建立储层对比的地层约柬框架,在此基础上开展高分辨率层序地层分析及高频旋回对比,总结出一套"逐级控制、旋回对比"的储层精细对比模式。基于储层精细对比研究,X区块采用水平井分7套层系开发,有效改善了油田的开发效果。
Dongying Fm reservoir of X block in J oilfield is typical sediments of delta steep slope belt,characterized by large stratigraphic dip,high reservoir thickness,many barriers and intercalated layers,complex fault systems.On the basis of the characteristics of thick and heavy oil reservoirs,finely dividing layers and drilling horizontal wells have been conducted in the study area.With well drilling data,seismic data,and well logging data,palaeogeomorphic reconstruction has been finished,and marker layers have been selected.In addition,the constrained stratigraphic framework for reservoir correlation has been established.On the basis of these study results,high resolution stratigraphic sequence analysis as well as high frequency sedimentation cycle correlation has been accomplished,and finely reservoir correlation model,which is "step by step control,cycle correlation" has been constructed.Based on finely reservoir correlation,horizontal wells are drilled to develop the reservoirs in X block with seven development series,which has improved the development results efficiently.
Dongying Fm reservoir of X block in J oilfield is typical sediments of delta steep slope belt,characterized by large stratigraphic dip,high reservoir thickness,many barriers and intercalated layers,complex fault systems.On the basis of the characteristics of thick and heavy oil reservoirs,finely dividing layers and drilling horizontal wells have been conducted in the study area.With well drilling data,seismic data,and well logging data,palaeogeomorphic reconstruction has been finished,and marker layers have been selected.In addition,the constrained stratigraphic framework for reservoir correlation has been established.On the basis of these study results,high resolution stratigraphic sequence analysis as well as high frequency sedimentation cycle correlation has been accomplished,and finely reservoir correlation model,which is "step by step control,cycle correlation" has been constructed.Based on finely reservoir correlation,horizontal wells are drilled to develop the reservoirs in X block with seven development series,which has improved the development results efficiently.
引文
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[3]邓宏文,王红亮,祝永军,等.高分辨率层序地层学原理及应用[M].北京:地质出版社,2002:19-21.
[4]朱筱敏.层序地层学原理及应用[M].北京:石油工业出版社,1998.
[5]刘波.基准面旋回与沉积旋对比方法探讨[J].沉积学报,2002,20(1):112-117.
[6]王嗣敏,刘招君.高分辨率层序地层学在陆相地层研究中若干问题的讨论[J].地层学杂志,2004,28(2):179-183.
[7]淡卫东,张昌民,尹太举,等.川西白马庙气田上侏罗统蓬莱镇组高分辨率层序地层对比[J].沉积学报,2007,25(5):708-714.
[8]郑振英,庞洪汾.枣园油田枣园孔一段、孔二段油藏描述及开发综合调整方案编制[R].大港油田公司油气勘探开发技术研究中心,2003:2-10.
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