廊固凹陷近岸水下扇特征及控制因素
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摘要
通过对廊固凹陷18口井541 m岩心的系统观察、156口井测井序列的建立、1km×1 km三维地震测网密度的地震相识别,分析了该沉积体系的相带展布特征。该砂砾岩层总体趋势为向上厚度减薄、层数减少,共识别出5期扇体,多呈条带状沿大兴断层断面分布,每期之间发育稳定的暗色泥岩段。该近岸水下扇的形成受3级层序、大兴断层、古构造、古气候、古地形以及物源供给等多种因素的控制。3级层序的发育特点、大兴断层的分段活动以及特殊的物源供给背景因素的匹配对近岸水下扇形成起到决定性作用。2~3期扇体扇中分布范围广,储集条件好,是凹陷下一步开发工作的有利目标。
More studies on the characteristics and controlling factors of the glutenites of nearshore subaqueous fans in Langgu depression are required due to the frequent migration in the vertical and landscape orientation,strong anisotropism,and exploration difficulty.After observing 541 m cores in 18 wells,establishing logging sequences of 156 wells,and recognizing 1 km×1 km seismic phase,the sediment characteristic and controlling factors of this glutenite are analyzed.This glutenite lies in the dark mudstone and the positive circle of progressive sequence.It can be divided into five periods.From the bottom,the thickness reduces and the layer numbers becomes small.It is thought that the formation of nearshore subaqueous fans is under the control of many factors,such as sequence,Daxing faults,palaeotectonics,palaeoclimatologics,palaeotopography,matter supplementation,but the interaction of three factors is crucial function,that is the sequence development,the intense activity of Daxing faults and matter supplementation.The second and third fans are favorable objects in the next exploitation task.
More studies on the characteristics and controlling factors of the glutenites of nearshore subaqueous fans in Langgu depression are required due to the frequent migration in the vertical and landscape orientation,strong anisotropism,and exploration difficulty.After observing 541 m cores in 18 wells,establishing logging sequences of 156 wells,and recognizing 1 km×1 km seismic phase,the sediment characteristic and controlling factors of this glutenite are analyzed.This glutenite lies in the dark mudstone and the positive circle of progressive sequence.It can be divided into five periods.From the bottom,the thickness reduces and the layer numbers becomes small.It is thought that the formation of nearshore subaqueous fans is under the control of many factors,such as sequence,Daxing faults,palaeotectonics,palaeoclimatologics,palaeotopography,matter supplementation,but the interaction of three factors is crucial function,that is the sequence development,the intense activity of Daxing faults and matter supplementation.The second and third fans are favorable objects in the next exploitation task.
引文
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[13]赵红格,刘池洋.大兴断裂分段性研究[J].石油与天然气地质,2002,23(4):368-371.
[14]梁苏娟,刘池洋,王定一.冀中拗陷下第三系构造背斜成因分类[J].西安工程学院学报,2002,24(1):25-28.
[2]王连山,朱庆忠.廊固凹陷大兴砾岩体隐蔽油气藏储层预测研究[J].物探化探计算技术,2003,25(4):308-311.
[3]朱庆忠,李春华,杨合义.廊固凹陷大兴砾岩体成因与油气成藏[J].石油勘探与开发,2003,30(4):34-36.
[4]张金亮,沈凤.乌尔逊凹陷大磨拐河组近岸水下扇储层特征[J].石油学报,1991,12(3):25-35.
[5]张萌,田景春.“近岸水下扇”的命名、特征及其储集性[J].岩相古地理,1999,19(4):42-52.
[6]孙连浦,刘招君,李本才,等.水下扇岩相特征及形成机制[J].世界地质,2001,20(3):249-256.
[7]张荣红,余素玉,邬金华.陆相湖盆中沉积物供给因素对层序地层分析的影响[J].地球科学——中国地质大学学报,1997,22(2):139-144.
[8]Prabir D.Architecture and facies pattern of a sublacustrinefan,J haria Basin,India[J].Sedimentary Geology,2002,148:373-387.
[9]李淳单.家寺油田湖相斜坡扇沉积特征[J].石油大学学报:自然科学版,1999,23(2):11-13.
[10]鄢继华,陈世悦,姜在兴.东营凹陷北部陡坡带近岸水下扇沉积特征[J].石油大学学报:自然科学版,2005,29(1):12-16.
[11]张文朝,崔周旗,韩春元,等.冀中拗陷老第三纪湖盆演化与油气[J].古地理学报,2001,3(1):45-54.
[12]田景春,陈洪德,覃建雄,等.层序岩相古地理图及其编制[J].地球科学与环境学报,2004,26(1):6-12.
[13]赵红格,刘池洋.大兴断裂分段性研究[J].石油与天然气地质,2002,23(4):368-371.
[14]梁苏娟,刘池洋,王定一.冀中拗陷下第三系构造背斜成因分类[J].西安工程学院学报,2002,24(1):25-28.
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