利用地震属性研究准噶尔盆地西北缘拐19井区下侏罗统三工河组沉积相  

Research on sedimentary facies of the Sangonghe Formation of Lower Jurassic by seismic attributes in Well G19 of northwestern margin area in Junggar Basin

作　　者：王世瑞[1] 彭苏萍[1] 凌云 王晓平[2] 吴琳 

机构地区：[1]中国矿业大学(北京校区),北京100083 [2]东方地球物理勘探有限责任公司凌云研究组,河北涿州072751

出　　处：《古地理学报》2005年第2期169-184,共16页Journal of Palaeogeography：Chinese Edition

摘　　要：在准噶尔盆地西北缘,寻找岩性圈闭油气藏已是至关重要的问题。但人们几乎还是用常规的手段来寻找岩性油气藏,没有实质性进展。本文是以利用宽方位角采集的地震数据为基础,对数据进行高保真资料处理和参考标准层的层拉平解释。利用前人的区域地质研究成果和钻井解释成果对侏罗系的沉积环境进行了精细的描述,确定了拐19井区在下侏罗统三工河组的出油层段附近的沉积环境由湖泊相—三角洲前缘相—河流相—湖泊相的演化过程。利用地震属性解释的结果也能较好地反映目标区的沉积环境变迁,并且与区域地质、测井解释结果相吻合,为寻找油气提供了很好的依据。因此利用地震属性可以进行沉积环境分析,为寻找岩性圈闭及油气藏做出贡献。Searching for lithologic reservoir has become an imp ortant problem in the northwestern margin area in Junggar Basin.No essential progress has been made in fi nding such reservoir using conventional measures. Based on the seismic data col l ected by wide azimuth acquisition, the authors made high accuracy-preserving da t a processing and layer flattening interpretation of the reference layer. Fine de scription of sedimentary environments of the Jurassic was made using the regiona l geological research results and drilling interpretation results by preresearch ers. The sedimentary environments neighbouring the oil-bearing interval of San gong he Formation of Lower Jurassic in Well G19 area experienced the evolution from lacustrine facies to delta front facies to fluvial facies to lacustrine facies. Interpr etat ion results by seismic attributes also reflect the evolution of sedimentary envi ronments of the target area and coincide well with the regional geologic results and logging interpretation results, thus providing good evidence for oil and ga s exploration. Analysis of evolution of sedimentary environments can be made by s e ismic attributes and also contributions to exploration for lithologic reservoir in the oilfield can be made based on this.

关 键 词：准噶尔盆地西北缘 地震属性 三工河组 下侏罗统 沉积相 沉积环境分析 岩性圈闭 区域地质 岩性油气藏 三角洲前缘 资料处理 研究成果 演化过程 环境变迁 测井解释 湖泊相 实质性 数据为 方位角 层拉平 标准层 高保真 侏罗系 

分 类 号：P618.130.2[天文地球—矿床学] P618.13[天文地球—地质学]