CAJ | 학술논문

塔里木盆地塔中北围斜地区中下奥陶统顶部是否存在暴露剥蚀，对明确该地区的储层发育主控因素及下一步勘探方向至关重要。通过对新三维地震剖面反射特征、已钻井Ro 热演化剖面及裂缝充填方解石δ13 C、δ18 O同位素特征的分析，初步认为受加里东中期Ⅰ幕构造运动的影响，塔中北围斜地区中下奥陶统顶部遭受了不同程度的暴露剥蚀，临近塔中Ⅰ号断裂带的地区剥蚀程度增大，这将会提升该地区加里东中期Ⅰ幕风化壳岩溶领域的油气勘探潜力。
탑리목분지탑중북위사지구중하오도통정부시부존재폭로박식，대명학해지구적저층발육주공인소급하일보감탐방향지관중요。통과대신삼유지진부면반사특정、이찬정Ro 열연화부면급렬봉충전방해석δ13 C、δ18 O동위소특정적분석，초보인위수가리동중기Ⅰ막구조운동적영향，탑중북위사지구중하오도통정부조수료불동정도적폭로박식，림근탑중Ⅰ호단렬대적지구박식정도증대，저장회제승해지구가리동중기Ⅰ막풍화각암용영역적유기감탐잠력。
Whether there was exposure erosion of the Lower-Middle Ordovician top in Beiweixie region of the middle Tarim Basin, it is critical to identify the controlling factors for reservoir development and exploration direction in the study area. Through the analyses of the reflection characteristics of new 3d seismic profile, Ro thermal evolution profile of drilled well, andδ13 C,δ18 O isotopes of fracture-filling calcites, it is concluded that the Lower-Middle Ordovician top may have suffered various degrees of exposure erosion in Beiweixie region under the action of the episode Ⅰ of the mid-Caledonian. Denudation degree increases approaching to the Tazhong No. Ⅰ fault belt, which enhances the oil and gas exploration potential of weathering crust karst areas of the episodeⅠof the mid-Caledonian in the study area.