CAJ | 학술논문

大民屯凹陷元古宇为主要的油气产层,主要分布于凹陷的西部和北部,呈北东走向、由西南向北东呈阶梯状分布的格局,目前已建成了静安堡北、平安堡、安福屯油田.综合研究认为,中上元古界长城系的大红峪组和高于庄组储集层主要为碳酸盐岩和石英岩类,并将两组地层分7个沉积旋回18个小层.总结了不同岩性、不同小层的储集层特征,认为储集空间主要有裂缝、孔隙和洞3类,并以高角度裂缝为主.白云岩多为裂缝型储层;石英砂岩以裂缝为主,晶孔、晶洞、晶缝为辅型储层.结合测井资料,对含油气储层进行了识别和综合评价.对影响储集性能的因素进行了分析,认为受岩性、断裂、古风化、岩溶等条件综合控制,储集空间复杂,非均质性较强.
대민둔요함원고우위주요적유기산층,주요분포우요함적서부화북부,정북동주향、유서남향북동정계제상분포적격국,목전이건성료정안보북、평안보、안복둔유전.종합연구인위,중상원고계장성계적대홍욕조화고우장조저집층주요위탄산염암화석영암류,병장량조지층분7개침적선회18개소층.총결료불동암성、불동소층적저집층특정,인위저집공간주요유렬봉、공극화동3류,병이고각도렬봉위주.백운암다위렬봉형저층;석영사암이렬봉위주,정공、정동、정봉위보형저층.결합측정자료,대함유기저층진행료식별화종합평개.대영향저집성능적인소진행료분석,인위수암성、단렬、고풍화、암용등조건종합공제,저집공간복잡,비균질성교강.
Proterozoic era of Damintun depression is the important oil and gas producing reservoir in Liaohe field, which mainly distributes in the west and north of the depression in step array in north trend ang east trend. Up to date,Jing'anbaobei oilfield, Ping'anbao oilfield,Anfutun oilfield have been established. Through geological study, Proterozoic is divided into two formations, i.e, Dahongyu Formation and Gaoyuzhang Formations which are further divided into 18 zones with 7 sedimentary cycles. The dominant reservoir rocks are carbonate and quartzite. The reservoir features are studied and summarized indicating three kinds of hydrocarbon storage spaces, which are fractures, pores, and cavities, and the high aperture fractures are the dominant storage spaces. It is found out that dolomite rock reservoir is the fractured reservoir, and quartzose reservoirs mainly are fractured reservoir and the secondary important reservoirs are crystalline pores, crystalline vuggy and crystalline fissures reservoir. Based on the logging data, oil and gas bearing reservoir identification and comprehensive evaluation are made, in addition, the analysis on the factors controlling the reservoir storage properties is done, and it is found out that reservoir hydrocarbon storage spaces are very complicated and highly heterogeneous, which are controlled by lithology, fault, karst, paleo-weathering.