地质科技情报2012，Vol.31Issue(2)：60-66,7.
雅克拉断凸东段侏罗系—白垩系地层超覆圈闭预测
The Prediction of Jurassic-Cretaceous Stratigraphic Overlap Traps in the East Part of Yakela Fault Arch
摘要
Abstract
The east part of Yakela fault arch is located in the frontal uplift of Kuqa Depression. Jurassic-Cretaceous formation southward onlapped the pre-Mesozoic uplift basement, formed a series of strati-graphic overlap traps. However, most of Jurassic-Cretaceous onlap units are related to different underlaying formations under the pre-Mesozoic regional unconformity T° in different degree. Sealing property of the underlaying formations directly infleunces the effectiveness of traps. Based on seismic attributes, well calibration and 3-D seismic sections, the distribution, lithology and sealing property of underlaying formations under T5 unconformity are divided into three types. Mudstone and argillaceous dolomite from Lower Cambrian Yuertus Formation to Sinian are good sealing floors. Proterozoic metamorphic rock, Mid-Upper Cambrian dolomite, and Carboniferous sand-mudstone are possible sealing floors. Mid-Upper Cambrian karst dolomite and Proterozoic dissolved metamorphic rock are permeable reservoir floors. Model analysis further verifies the seismic identification characteristics of this three lithologies. It is concluded that Jse3, Ksel and Jsel cycle near DG2 are likely to form appreciable and effective stratigraphic overlap traps.关键词
雅克拉断凸/地层超覆圈闭/底板封堵性/地震属性/地震正演Key words
Yakela fault arch/ stratigraphic overlap trap/ floor sealing/ seismic attribute/ seismic forward分类
天文与地球科学引用本文复制引用
田媛媛,蒲仁海,云露,韩强..雅克拉断凸东段侏罗系—白垩系地层超覆圈闭预测[J].地质科技情报,2012,31(2):60-66,7.基金项目
国家科技重大专项(2008ZX05001-003) （2008ZX05001-003）
