时频分析技术识别泌阳凹陷毕店地区河道砂体  

Channel Sandbodys Identification by Time-Frequency Analysis in Bidian of Biyang Sag

作　　者：杨道庆[1] 张永华[1] 罗家群[1] 赵雨晴[1] 李恒权[1] 

机构地区：[1]中石化河南油田分公司,河南郑州450000

出　　处：《特种油气藏》2015年第1期12-15,151,共4页Special Oil & Gas Reservoirs

基　　金：中国石油化工股份有限公司科技项目"泌阳凹陷新领域成藏条件与富集规律研究"(P13103)

摘　　要：针对泌阳凹陷毕店地区三角洲前缘水下分流河道与扇三角洲等多物源砂体厚度不稳定、整体偏薄的问题,采用正演、时频分析及地层切片技术开展河道砂体识别研究。通过层位精细标定,确定B398井油层在地震剖面上的反射特征;采用时频分析方法,确定有利于描述目标储层的分频数据体;通过构造精细解释,确定储层构造背景;在等时地层格架约束下,以分频体为基础,通过构造精细解释及地层切片技术,准确刻画构造特征及砂体边界,有效识别了三角洲前缘水下分流河道平面展布。在该区相继部署的B398、B404、D5、D8等井均获得日产20 t/d以上的高产工业油流,取得较好勘探效果。Multi- source sandbodys of delta front underwater distributary channel,fan- delta,etc. with unstable and generally small thickness are developed in Bidian of Biyang Sag. Forward model,time- frequency analysis and strata slice are used to identify channel sandbodys. The reflectance signature of reservoirs in Well B398 in seismic section is determined through fine horizon calibration. The favorable fractional- frequency data- body of describing interest- reservoirs is determined by time- frequency analysis. Reservoir structural settling is identified by fine structural interpretation. Based on the constraint of isochronous stratigraphy framework and fractional- frequency data- body,the structure characteristics and sand- body boundaries are exactly described and delta front underwater distributary channel plane distribution is effectively identified by fine structural interpretation and strata slice.Favorable exploration and high industrial daily oil production rate of more than 20 t/d are achieved in the successively deployed wells of Well B398,Well B404,Well D5,Well D8,etc.

关 键 词：泌阳凹陷 河道砂体 正演模型 时频分析 地层切片 

分 类 号：TE121.1[石油与天然气工程—油气勘探]