陈家庄凸起西段陈22块东营组地层超覆油藏地震描述技术
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摘要
古近系东营组在陈家庄凸起西段由西、北、东3个方向向凸起高部位尖灭,形成了大量的地层超覆圈闭。以陈22块勘探实践为例,总结出一套适合于该区东营组地层超覆油藏的地震描述技术。即利用地震资料预处理提高分辨率,在地震剖面上直接识别追踪油层;地震相分析落实有利储层发育区;分频属性分析圈定主力含油小层分布范围,刻画其超覆线的位置;测井约束反演描述主力含油小层构造,确定钻探目标。截至2006年底,利用该技术在陈22块部署了9口探井,其中6口井获工业油流,探明石油地质储量达200×104t。
A lot of stratigraphic overlap traps formed as a result of the pin-chout of Dongying Formation to high position in west,north and east,western Chenjiazhuang Uplift. Taking Chen22 block for an example,a series of seismic techniques for describing the strati-graphic overlap oil reservoir of Dongying Formation in this area have been established. Resolution can be improved after pre -treatment of the seismic data. Oil -bearing formations may be traced directly on the seismic profile. Analysis of seismic facies is favorable of recognizing the developed reservoir region. Attrib-ute analysis by frequency division may determine the distribution range of major oil -bearing layers and the position of overlap line. The structure of the major oil-bearing layers may be described and the drilling target may be determined by log-constrained in-version method. Remarkable effects have been achieved by ap-plying these techniques in the area.
A lot of stratigraphic overlap traps formed as a result of the pin-chout of Dongying Formation to high position in west,north and east,western Chenjiazhuang Uplift. Taking Chen22 block for an example,a series of seismic techniques for describing the strati-graphic overlap oil reservoir of Dongying Formation in this area have been established. Resolution can be improved after pre -treatment of the seismic data. Oil -bearing formations may be traced directly on the seismic profile. Analysis of seismic facies is favorable of recognizing the developed reservoir region. Attrib-ute analysis by frequency division may determine the distribution range of major oil -bearing layers and the position of overlap line. The structure of the major oil-bearing layers may be described and the drilling target may be determined by log-constrained in-version method. Remarkable effects have been achieved by ap-plying these techniques in the area.
引文
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[2]隋风贵,赵乐强,林会喜,等.济阳坳陷第三系地层油藏形成机制与组合模式[J].油气地质与采收率,2005,12(6):1-5.
[3]周小进,陈跃,黄继文,等.库车坳陷南缘地层超覆圈闭特征及含油气前景[J].石油实验地质,2000,22(1):40-45.
[4]侯春华,肖武,周香翠,等.胜利油区油藏分类研究[J].油气地质与采收率,2005,12(2):42-44.
[5]隋风贵,王学军,卓勤功,等.陆相断陷盆地地层油藏勘探现状与研究方向———以济阳坳陷为例[J].油气地质与采收率,2007,14(1):1-6.
[6]李庆忠.走向精确勘探之路[M].北京:石油工业出版社,1993.
[7]罗红梅.地震属性技术在现河地区滑塌浊积岩油藏勘探中的应用[J].工程地球物理学报,2005,2(3):224-227.
[8]张延章,尹寿鹏,张巧玲,等.地震分频技术的地质内涵及其效果分析[J].石油勘探与开发,2006,33(1):64-71.
[9]崔永谦,武耀辉,罗宁,等.岩性地层油气藏勘探技术[J].中国石油勘探,2004,(3):17-24.
[10]韩文功,张建宁,王金铎.济阳坳陷隐蔽圈闭识别与精细描述[J].石油与天然气地质,2006,27(6):849-859.
[11]张善文.济阳坳陷第三系隐蔽油气藏勘探理论与实践[J].石油与天然气地质,2006,27(6):731-740.
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