新疆博格达山西缘米泉地区构造解析与建模

新疆博格达山西缘米泉地区油气地质条件优越，但构造变形复杂，地震资料品质较差，准确落实地下地质构造是油气勘探取得突破的关键。该区地表露头出露良好，地震、非地震(MT)和钻井等资料丰富，为落实地下地质构造提供了良好的资料基础。通过对该区地表地质、地震、非地震、钻井和测井等资料的综合研究与应用分析，结合对前人构造解析与建模理论成果和主要技术方法的总结，形成了针对山前冲断带复杂构造变形区以断层相关褶皱构造解析为核心、多因素约束的综合构造解析与建模技术，建立了米泉地区多层次逆冲推覆构造模型。这项技术应用于构造特别复杂地区低成像品质地震资料的构造解释，可有效降低地震资料解释的多解性。

Structural Analysis and Modeling in Miquan Area of the Western Margin of the Bogda Mountain,Xinjiang

There are favorable hydrocarbon elements in the Miquan area of the western margin of Bogda Mountain, Xinjiang. However, complex tectonic deformation and poor seismic imaging quality make identification of underground structures difficult. The accuracy of such identification is the key to a breakthrough in oil and gas exploration. Well-exposed outcrops, seismic sections, magnetotelluric and drilling data, etc., provide important information for defining underground structures. From an integrated analysis based on fault-related fold theory and main methods of structural analysis and modeling, it is pointed out that geological outcrops, magnetotelluric, drilling and logging data, together with other factors need to be comprehensively taken into account during seismic interpretation in order to accurately identify subsurface structures. Therefore, structural analysis and modeling implies a highly comprehensive work in the tectonically-deformed zone of the foreland fold and thrust belt. Beginning with a summary of traditional structural analysis and modeling workflows and theoretical methods for complex structures, a new multi-factors-constrained, integrated analysis and modeling technique is proposed, based on fault-related fold analysis. Using this developed technology as a guide, a multi-level detachment thrust nappe model is built for the Miquan area of the western margin of Bogda Mountain, Xinjiang. This technique can be applied to guide the seismic interpretation of strongly-deformed, low image quality structures, effectively improving its accuracy.