何羽,任丽,邓楠.鄂尔多斯盆地南部ywb地区中生界小断层特征及其油气勘探意义[J].西北地质,2020,53(1):189-194 HE Yu,REN Li,DENG Nan.The Characteristics of the Small Faults in Mesozoic Strata of ywb Area in the South of Ordos Basin and Its Significance for Oil and Gas Exploration[J].Northwestern Geology,2020,53(1):189-194
鄂尔多斯盆地南部ywb地区中生界小断层特征及其油气勘探意义
The Characteristics of the Small Faults in Mesozoic Strata of ywb Area in the South of Ordos Basin and Its Significance for Oil and Gas Exploration
投稿时间:2019-08-14  修订日期:2019-10-16
DOI:10.19751/j.cnki.61-1149/p.2020.01.017
中文关键词:  鄂尔多斯盆地南部;“两宽一高”三维地震;小断层;油气成藏;勘探意义
英文关键词:the southern Ordos basin;broadband;wide-azimuth and high-dengsity 3D seismic data;small faults;hydrocarbon accumulation;exploration significance
基金项目:国家科技重大专项大型油气田及煤层气开发"鄂尔多斯盆地致密油开发示范工程"三维地震成像处理及储层预测(2017ZX05069001)
作者单位
何羽 中国石油大学(北京)地球科学学院, 北京 102200 
任丽 中国石油集团东方地球物理勘探有限责任公司研究院长庆分院, 陕西 西安 710021 
邓楠 长安大学地球科学与资源学院, 陕西 西安 710054 
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中文摘要:
      通过对近年采集的高品质"两宽一高"(宽频带、宽方位、高密度)三维地震资料精细处理解释发现鄂尔多斯盆地南部ywb地区中生界发育一系列小断层。在对断层构造及其演化特征研究基础上,系统分析了小断层体系特征、活动期次及其动力学成因机制。研究认为微小断层起到了沟通油源、控制油气运聚及富集的作用,与小断层伴生的裂缝能够改善致密储层的物性。研究结果对该区中生界油藏主控因素和成藏规律有了新认识,对该区油气勘探具有重要指导意义。
英文摘要:
      Through a fine interpretation of the high-quality 3D seismic data, i.e. broadband, wide-azimuth and high-density, acquisitioned in recent years, this paper finds that a series of small faults are developed in Mesozoic strata in the ywb area region of the southern Ordos Basin. Based on the research on the tectonic structure and evolution of the fault, this paper analyzes the system of the fault, its activity period and its dynamic mechanism. It is suggested that the small fault played an important role in connecting sources rocks with reservoir beds, controlling oil/gas migration and accumulation. The cracks associated with small fault can improve the physical properties of tight sandstone reservoir. The results of the study have a new view on the main controlling factors and the law of hydrocarbon accumulation, and also have an important guiding significance for oil/gas exploration in this area.
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