渤海莱州湾凹陷古近系沙四段上亚段沉积体系研究
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摘要
运用含油气盆地沉积学的理论和方法,在大量岩心、录井、测井及地震资料分析基础上,查明了渤海莱州湾凹陷古近系沙四段上亚段沉积体系的类型、特征及分布规律。莱州湾凹陷古近系沙四段上亚段发育有扇三角洲、盐湖沉积体系,扇三角洲靠近东部和北部盆缘断裂发育,东北部发育碳酸盐浅滩,向沉积中心区域依次发育膏盐沉积和盐岩沉积为盐湖相。扇三角洲分布区为优质油气储层发育,是油气勘探的重点区带。盐岩沉积是形成有利的岩性油气成藏组合带的良好条件。
The utilization the oil and gas bearing basin sedimentology's theory and the method,based on the massive core,the logging,the well logging and the seismic data analysis,the deposition system's type,the characteristic and the distributed rule of the upper Sha4 Formation(Paleogene) in Laizhouwan Sag,Bohai Bay has been verified.Laizhouwan Sag developed the fan delta and the saline lack deposit system.The fan delta developed in the eastern and northern of the fault basin boundary.Shallow carbonate developed in the northeast part that connected with Miaoxi Sag.Gypsum deposits and salt deposits developed to the central region.The fan delta distribution area,developed high quality reservoir of oil gas,is the oil-gas exploration key area belt.Salt deposits would be the formation of favorable conditions for lithologic trap reservoir.
The utilization the oil and gas bearing basin sedimentology's theory and the method,based on the massive core,the logging,the well logging and the seismic data analysis,the deposition system's type,the characteristic and the distributed rule of the upper Sha4 Formation(Paleogene) in Laizhouwan Sag,Bohai Bay has been verified.Laizhouwan Sag developed the fan delta and the saline lack deposit system.The fan delta developed in the eastern and northern of the fault basin boundary.Shallow carbonate developed in the northeast part that connected with Miaoxi Sag.Gypsum deposits and salt deposits developed to the central region.The fan delta distribution area,developed high quality reservoir of oil gas,is the oil-gas exploration key area belt.Salt deposits would be the formation of favorable conditions for lithologic trap reservoir.
引文
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[2]李思田.大型油气系统形成的盆地动力学背景[J].地球科学,2004,29(5):505~512.
[3]孙和风,周心怀,彭文绪.莱州湾凹陷油气成藏动力学特征[J].西安石油大学学报(自然科学版),2009,24(4):27~35.
[4]李春荣,陈开远,柳保军,等.盐湖盆地沉积与油气形成的关系[J].西部探矿工程,2004,96(5):46~48.
[5]沈艳杰,程日辉,王嘹亮,等.粤东地区上白垩统盐湖沉积及其在南海北部中生界油气勘探中的意义[J].吉林大学学报(地球科学版),2009,39(5):760~765.
[6]张士万.潜江盐湖沉积特征及储层预测技术[J].石油天然气学报(江汉石油学院学报),2007,29(5):36~38.
[7]郭精义,杨占龙,黄刚,等.潜江凹陷新农地区沉积微相特征与岩性油气藏[J].天然气地球科学,2006,17(2):250~255.
[8]范书豪.高台子油田北部葡萄花油层沉积微相研究[J].内蒙古石油化工,2010,9:175~176.
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