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针对泌阳凹陷地层沉积特点,以高精度地震资料、钻井和测井资料为基础,采用高精度层序地层学方法,通过对不整合面的识别和追踪,建立了泌阳凹陷重点勘探层段下第三系沉积的区域等时地层格架,划分出一级层序界面3个、二级层序界面3个、三级层序界面7个。在三级层序界面控制下,利用露头剖面和具代表性的钻井资料进行了层序地层和沉积相研究;结合过井高分辨率三维地震剖面,对凹陷中的各井进行了高精度层序地层和沉积相的划分和对比;在单井短期旋回叠加样式的基础上,对中期基准面旋回层序进行了等时对比,建立了高分辨率层序地层格架。在分析层序格架内储层发育规律的基础上,预测了隐蔽油藏的有利勘探区带,并利用地震属性分析技术和地震反演技术对砂砾岩扇体及其分布的边界进行了描述。根据预测结果部署的探井试采均获得了工业油流,新增石油控制储量1092×10~4t。
Aiming at the characteristics of sedimentary strata in Biyang Depression, based on high-precision seismic data, drilling and well logging data, high-precision sequence stratigraphy method was adopted. By identifying and tracking unconformities, the key exploration intervals in Biyang Depression In the third stage, the isochronal stratigraphic framework is divided into three primary order sequences, three secondary sequence sequences, and three tertiary sequence boundaries. Under the control of the third-order sequence interface, the sequence stratigraphy and sedimentary facies were studied by using the outcrop profile and the representative drilling data. Combined with the over-well high-resolution three-dimensional seismic profile, the wells in the depression were studied with high-precision layer Order stratigraphy and sedimentary facies are divided and compared. Based on the single-well short-term cyclic superimposition pattern, the mid-term base-level cycles are isochronously compared and a high-resolution sequence stratigraphic framework is established. Based on the analysis of the reservoir development rules in the sequence framework, the favorable exploration zones of subtle reservoirs are forecasted, and the boundaries of sand-conglomerate fans and their distributions are described by using seismic attribute analysis and seismic inversion . According to the prediction results, the exploration wells that have been deployed in the trial have all obtained industrial oil flow, and the newly-added petroleum control reserves are 1092 × 10 ~ 4t.