CAJ | 학술논문

为了研究鄂尔多斯盆地马坊地区长8油层组油藏特征及富集规律，在沉积相研究的基础上，通过地震资料的解释和构造对比等方法，对该区的断层发育特征进行了详细研究。研究认为鄂尔多斯盆地马坊地区长8油层组油藏发育于三角洲平原分流河道高孔、高渗的砂体中，分布于天环坳陷两侧的斜坡带上，东侧斜坡是油藏主要的分布区，西侧斜坡带则分布较少。马坊地区中部发育北西－南东向展布正断层，对岩性油藏进行重新调整，造成断层下盘油藏被破坏。长8段油藏富集规律可归纳为：分流河道高孔高渗砂体是油藏形成的基础，泥岩封堵形成的岩性圈闭是油藏聚集的场所，后期的断层对先期的油藏起沟通和调整作用，相向正断层形成的断背斜是油藏富集的重要的构造部位。
위료연구악이다사분지마방지구장8유층조유장특정급부집규률，재침적상연구적기출상，통과지진자료적해석화구조대비등방법，대해구적단층발육특정진행료상세연구。연구인위악이다사분지마방지구장8유층조유장발육우삼각주평원분류하도고공、고삼적사체중，분포우천배요함량측적사파대상，동측사파시유장주요적분포구，서측사파대칙분포교소。마방지구중부발육북서－남동향전포정단층，대암성유장진행중신조정，조성단층하반유장피파배。장8단유장부집규률가귀납위：분류하도고공고삼사체시유장형성적기출，니암봉도형성적암성권폐시유장취집적장소，후기적단층대선기적유장기구통화조정작용，상향정단층형성적단배사시유장부집적중요적구조부위。
Sedimentary facies study was combined with seismic data interpretation and tectonic correlation to analyze the features of faults development in the Mafang area of Ordos Basin ,so as to gain a deep insight into the characteristics and accumulation pattern of oil reservoirs in the 8 th member of the Yangchang Formation .The research shows that the reser-voirs were developed in delta-plain distributary channel sands with high-porosity and high-permeability and distributed on the slope belts along the two flanks of the Tianhuan sag .Oil reservoirs were mainly distributed in the east flank .In con-trast ,fewer reservoirs occur in the west flank .However ,the northwest-southeast striking normal fault developed in the cen-tral Mafang area readjusted and destroyed the reservoirs in the foot wall .The accumulation pattern of the reservoirs can be summarized as the high-porosity and high-permeability sand bodies in the distributary channels were the reservoirs ,litho-logical traps bounded by mudstone provided accumulation space for oil;later faulting activities connected and adjusted the previously-formed reservoirs and faulted anticline formed by opposite normal faults was important structural locations for oil and gas to accumulate .