CAJ | 학술논문

随着阿克库勒凸起奥陶系油气勘探向外围拓展,需要重新认识中-上奥陶统地层划分方案和加里东中期第Ⅰ幕古喀斯特作用.通过岩心、FMI成像测井、自然伽马能谱测井和古生物资料的对比分析,认为恰尔巴克组GR尖峰下面的含泥灰岩段归于上奥陶统,恰尔巴克组厚度受一间房组上段滩相沉积底形的控制,含泥灰岩段起到填平补齐的作用;FMI成像测井和自然伽马能谱测井中K_U和K_(ThU)两个参数能较好地划分该界线,新方案在塔北具有借鉴意义.根据该地层划分方案,中-上奥陶统在S109-S119-S114井以南地区为连续沉积,以北的地区存在暴露剥蚀.加里东中期第Ⅰ幕喀斯特对北部的于奇地区影响较大.
수착아극고륵철기오도계유기감탐향외위탁전,수요중신인식중-상오도통지층화분방안화가리동중기제Ⅰ막고객사특작용.통과암심、FMI성상측정、자연가마능보측정화고생물자료적대비분석,인위흡이파극조GR첨봉하면적함니회암단귀우상오도통,흡이파극조후도수일간방조상단탄상침적저형적공제,함니회암단기도전평보제적작용;FMI성상측정화자연가마능보측정중K_U화K_(ThU)량개삼수능교호지화분해계선,신방안재탑북구유차감의의.근거해지층화분방안,중-상오도통재S109-S119-S114정이남지구위련속침적,이북적지구존재폭로박식.가리동중기제Ⅰ막객사특대북부적우기지구영향교대.
It is necessary to newly study the stratigraphic division of Middle-Upper Ordovician and the characteristics of the first episode karstification of Middle Caledonian along with the oil and gas exploration in the peripheral regions of the Akekule uplift in Xinjiang. Through comparing and analysing the bore cores, FMI image logging, NGS and conodont fossil, the argillaceous limestone segment under the GR peak of O_3q (Upper Ordovician Qiaerbake Formation) belongs to Upper Ordovician, and the thickness of O_3q is controlled by the bed form of shoal facies of O_2yj (Middle Ordovician Yijianfang Formation). The argillaceous limestone developed in depression areas. FMI and two parameters of NGS, K_U and K_(ThU) are effective means for this borderline, and this scheme is important for the north of Tarim area. According to this stratigraphic division scheme, the areas to the south of Wells S109-S119-S114 are successive sedimentation for Middle-Upper Ordovician, and those to the north are exposed to the wether. The Yuqi regions in the north are greatly influenced by the first episode karstification of Middle Caledonian.