【摘要】 针对埕岛东坡东营组储层纵向分层和平面精细预测难的问题,运用高精度层序地层学和沉积学理论及方法,综合分析钻井取心、测井、录井及三维地震等资料,通过关键界面的识别,将埕岛东坡东营组划分为3个三级层序和14个准层序组,建立了东营组高精度等时层序地层格架,详细剖析了主要含油层段SQ2层序的低位体系域和水进体系域中发育的碎屑流、浅水风浪改造的洪水重力流、深水洪水重力流、滩坝及风暴沉积等5种沉积相类型及演化规律。在此基础上,针对主力含油层段储层地质特征及预测难点,选择地震波形指示反演方法,进行高精度层序地层约束下的储层精细预测,实现了单砂体纵向和横向分辨率的同时提高,经与已钻井验证,6口新钻井SQ2水进体系域顶部砂体预测厚度误差为2. 6 m,取得了较好的应用效果。研究结果为埕岛东坡的后续精细勘探提供有力技术支撑。更多还原

【Abstract】 High-precision sequence stratigraphy and sedimentology theories and methods were adopted to improve the vertical stratification and lateral reservoir prediction of the Dongying Formation in the eastern slope of Chengdao.Based on the drilling core test,logging,mud logging,3 D seismic and other data,the Dongying Formation in the eastern slope of Dongying Formation is classified into 3 third-order sequences and 14 subsequence groups. A highprecision isochronous sequence stratigraphic framework was established for the Dongying Formation. 5 sedimentary facies types and the corresponding evolution patterns in the low-stand system tract and transgressive system tract of SQ2 sequence within the main oil-bearing interval were analyzed in detail,which includes debris flow,flood gravity flow with shallow water transformation,deep water flood gravity flow,beach bar and storm deposit. On this basis,according to geology and prediction challenges of the main oil-bearing interval,the seismic waveform indication inversion was adopted to carry out reservoir prediction under the constraint of high-precision sequence stratigraphic framework. Both the vertical and lateral resolution for the single sandbody were improved,which shows a favorable prediction. The 6-well field drilling verification of shows that the predicted thickness error of the sandbody at the top of SQ2 transgressive system tract is only 2.6 m. This research could provide certain technical basis for the fine exploration in the east slope of Chengdao.更多还原