临兴地区太二段沉积微相及其对砂体的控制  

Sedimentary microfacies and its Controls on sandbody of 2nd Member of Taiyuan Formation in Linxing Area

作　　者：邢永生 林玉祥 李夏 马小伟 舒永 

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590

出　　处：《能源与环保》2017年第11期104-110,114,共8页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金"沁水盆地煤层气与致密砂岩气共生成藏机理研究"(41172108);国家油气重大专项(2016ZX05041-005-005)

摘　　要：临兴地区太二段是该区重要的含气层,以低孔、低渗致密砂岩为特点。砂岩的展布及物性的变化受沉积微相的控制,同时又对该区气藏有着重要的控制作用,因此研究该区太二段沉积微相具有重要意义。通过临兴地区岩心和测井资料的分析,建立了太二段地层格架和单井相模式。研究表明,该区太原组沉积相主要为障壁海岸沉积体系,包括障壁岛和潮坪两种亚相;潮坪进一步可分为砂坪、泥坪、混合坪、碳酸盐潮坪和泥炭沼泽等5种沉积微相。该区优势相为障壁岛和砂坪沉积微相,其控制了优质砂体形成与展布。在前述研究基础上优选出3个有利区:赵家坪乡—LX10—LX4井区、圪垯上乡—第八堡乡一线、兔坂镇—LX1—LX12井区。The 2 nd member of the Taiyuan Formation is an important gas bearing reservoir in Linxing area,with a character of low porosity and low permeability tight sandstone.The distribution and physical properties of sandstone are controlled by sedimentary microfacies,and the porosity and permeability of sandstones are important to the gas accumulation in this area.Therefore,it is of great significance to study the sedimentary microfacies of the 2 nd member of the Taiyuan Formation in this area.The Stratigraphic framework and the single well microfacies pattern of the 2 nd member of the Taiyuan Formation in Linxing area is established by researching the core and logging data.Studies have shown that,the sedimentary facies of the Taiyuan Formation in this area are mainly the barrier depositional system,including the barrier island and tidal flat subfacies.And the tidal flat sub-facies contain five kinds of sedimentary microfacies,such as sand pond,mud flat,mixed pond,carbonate tide and peat swamp.It is found that the two kinds of sedimentary microfacies of barrier wall and sanding are the dominant phases,which control the formation and distribution of high quality sand bodies.On this basis,three favorable areas are selected: Zhaojiaping township area( LX10—LX4 mining area),Gedashang township-Dibapu township area and Tuban town area( LX1—LX12 mining area).

关 键 词：沉积微相 砂体 太二段 有利区 临兴地区 

分 类 号：P534.45[天文地球—古生物学与地层学]