CAJ | 학술논문

对于以中新生代陆相湖盆勘探为主的中国，随着勘探领域由湖盆的浅水区转向深水区，打破了深水区为油气勘探禁区的观念。而深水细粒沉积的研究程度低，早期大多集中于烃源岩生油潜力分析。为了更好地认识深水区细粒沉积类型及成因，为非常规油气勘探提供指导，该文以鄂尔多斯盆地延长组为例，在调研大量文献资料的基础上，结合现代分析测试技术，对深水区的沉积相及岩石沉积成因进行了研究。主要探讨了深水原地沉积、凝灰岩、深部热液、远端浊积岩、放射性铀等的特征及成因，认为岩矿分析、地球化学分析是研究细粒沉积的主要手段，而纳米技术将是当前和今后的重要研究方法。深水区细粒沉积中发育一定量的孔隙，且由于其紧邻烃源岩，很容易聚集成藏，今后可作为重要的油气勘探对象之一。
대우이중신생대륙상호분감탐위주적중국，수착감탐영역유호분적천수구전향심수구，타파료심수구위유기감탐금구적관념。이심수세립침적적연구정도저，조기대다집중우경원암생유잠력분석。위료경호지인식심수구세립침적류형급성인，위비상규유기감탐제공지도，해문이악이다사분지연장조위례，재조연대량문헌자료적기출상，결합현대분석측시기술，대심수구적침적상급암석침적성인진행료연구。주요탐토료심수원지침적、응회암、심부열액、원단탁적암、방사성유등적특정급성인，인위암광분석、지구화학분석시연구세립침적적주요수단，이납미기술장시당전화금후적중요연구방법。심수구세립침적중발육일정량적공극，차유우기긴린경원암，흔용역취집성장，금후가작위중요적유기감탐대상지일。
Since the exploration objects gradually changed from shallow?water to deep?water area in lacustrine basinsfor China’ s Meso-Cenozoic lacustrine basins, it will break the concept that the deep?water area is a for?bidden zone for hydrocarbon exploration. Fine?grained deposits in the deep?water area were poorly studied in the past, and mainly focusing on the hydrocarbon?generating potential of source rocks. In order to determine the types and origins of the fine?grained deposits in the deep?water area, and to guide unconventional hydrocarbon explora?tions, a case study was made in the Yanchang Formation of the Ordos Basin. Based on a large amount of previous data and combined with modern testing techniques, the sedimentary facies and origins of rocks in the deep?water area were analyzed, especially the characteristics and origins of deep?water autochthonous sedimentation, tuff, deep thermal fluid, distal turbidite and radioactive uranium. It was emphasized that rock and mineral analysis together with geochemical analysis were the main methods to realize fine?grained deposits, among which nano?technology would be the main research method in current and the future. A certain amount of pores developed in the fine?grained deposits in the deep?water area, which were close to source rocks, hence were favorable for hydrocarbon accumulation and exploration.