CAJ | 학술논문

　　近几年勘探表明，准噶尔盆地西北缘风城地区二叠系风城组具巨大勘探潜力，该组储层以云质类岩石为主。为查明该区风城组沉积环境、沉积微相的展布特征，通过岩心观察、薄片鉴定、测井和录井资料分析，对该区沉积相特征进行研究。结果表明，准噶尔盆地西北缘风城地区二叠系风城组主要发育云质岩类岩石，含少量砂岩类、泥岩类。通过沉积相研究，结合研究区的构造背景、气候特征和沉积环境，认为研究区物源主要有两个：西部F26井以西物源、北部FC011井以北物源。风城组沉积期，研究区主要发育半深湖亚相沉积，在靠近物源区发育扇三角洲前缘水下分流河道沉积物及席状砂沉积物。沉积体系研究表明，该区风城组云质岩类岩石主要形成于半封闭咸水湖湾沉积环境，沉积环境对储层物性有较明显的控制作用，并据此建立了研究区冲积扇-扇三角洲-湖泊相的沉积模式。
　　근궤년감탐표명，준갈이분지서북연풍성지구이첩계풍성조구거대감탐잠력，해조저층이운질류암석위주。위사명해구풍성조침적배경、침적미상적전포특정，통과암심관찰、박편감정、측정화록정자료분석，대해구침적상특정진행연구。결과표명，준갈이분지서북연풍성지구이첩계풍성조주요발육운질암류암석，함소량사암류、니암류。통과침적상연구，결합연구구적구조배경、기후특정화침적배경，인위연구구물원주요유량개：서부F26정이서물원、북부FC011정이북물원。풍성조침적기，연구구주요발육반심호아상침적，재고근물원구발육선삼각주전연수하분류하도침적물급석상사침적물。침적체계연구표명，해구풍성조운질암류암석주요형성우반봉폐함수호만침적배경，침적배경대저층물성유교명현적공제작용，병거차건립료연구구충적선-선삼각주-호박상적침적모식。
Recent years exploration shows that Fengcheng formation of Permian in the northwestern margin of Junggar basin has great potential for exploration. The main reservoir in this area is dolomitic reservoir. In order to find out the sed-imentary environment and sedimentary microfacies distribution characteristics, providing reference for oil and gas explo-ration, In this paper, by means of the core observation, identification of thin sections, the comprehensive analysis of data of well logging and logging, we studied the sedimentary facies . The results show that the research area mainly develops dolomitic rock, only a small amount of sandstone and mudstone are developed. Based on the sedimentary facies research, combining the tectonic background、climate characteristics and sedimentary environment of research region, two major provenances are proposed:the west of western well F26 provenance and north of northern well FC011 provenance. In Fengcheng formation sedimentary periods, the study area mainly develops semi-deep lake facies , the fan delta front sub-distributary channel sediments and sheet sand constitute the main depositional systems near the source area, Feng Ⅰto FengⅡ section, the area of water increases and the range of clastic deposits decreases, the FengⅢ is similar to FengⅡ, without big change, according to the depositional systems, it shows that dolomitic rocks in the Fengcheng area are formed in semi-block salt bay sedimentary environment, reservoir physical properties are clearly controlled by sedi-mentary environment, which is the basic for us to build up the alluvial fan-fan detla-lacustrine Facies sedimentary system.