东营凹陷八面河断裂带隐蔽性圈闭识别与描述

Identification and Description of Elusive Entrapment of Bamianhe Fault Zone in Dongying Depression

东营凹陷八面河断裂带沙河街组具备形成岩性、构造-岩性等隐蔽性圈闭的有利条件,如何有效地识别这些圈闭是该区增储上产的关键。利用全三维解释、优势分频相位,结合三维可视化识别"三小"构造;开展储层标定、二维模型正演分析储层地震响应特征;在沉积古地貌分析基础上,结合频谱成像、地震属性、地震反演成果,识别河道砂、滩坝砂岩性油藏,发现一批岩性、岩性-构造圈闭,扩大了八面河地区含油范围。钻井证实该技术流程适应该区隐蔽性圈闭识别。

Shahejie formation of Bamianhe fault zone has the condition conducive to forming lithology and structurelithology elusive entrapments. How to effectively identify them is vital in promoting accumulation and production in the zone. This paper identifies ＂three--small--features＂ structure by using dip angle attribute, strengthening frequency division as well as phase and combining with 3D visualization. It analyzes reservoir seismic response characteristic through reservoir calibration and 2d forward modeling. It also identifies channel sand and beach bar sandstone reservoirs based on the analysis of sedimentary ancient landform and combined with spectral imaging, seismic attribute and seismic inversion result, discovering a batch of lithology and structure-lithology elusive entrapments. Drilling confirms that the identification process adapts to elusive entrapment identification in the zone.