CAJ | 학술논문

铁边城地区位于陕西昊旗县境内，构造处于鄂尔多斯盆地陕北斜坡西部。研究区长8储层为一套以碎屑岩为主的内陆湖泊三角洲相沉积。本文以测井相分析及岩心观察的岩石相标志为基础，通过砂地比值分布规律、单井剖面的相序分析，对鄂尔多斯盆地铁边城地区长8油层组沉积相类型及发育规律进行综合研究。结果表明铁边城地区长8期的主要沉积体系属于“浅水”湖泊一三角洲沉积体系，发育三角洲平原和三角洲前缘亚相，主要微相类型包括有三角洲平原分流河道、分流河道间、天然堤微相和三角洲前缘水下分流河道、分流问湾、水下天然堤微相。根据沉积微相展可以得出研究区的沉积模式。
철변성지구위우협서호기현경내，구조처우악이다사분지협북사파서부。연구구장8저층위일투이쇄설암위주적내륙호박삼각주상침적。본문이측정상분석급암심관찰적암석상표지위기출，통과사지비치분포규률、단정부면적상서분석，대악이다사분지철변성지구장8유층조침적상류형급발육규률진행종합연구。결과표명철변성지구장8기적주요침적체계속우“천수”호박일삼각주침적체계，발육삼각주평원화삼각주전연아상，주요미상류형포괄유삼각주평원분류하도、분류하도간、천연제미상화삼각주전연수하분류하도、분류문만、수하천연제미상。근거침적미상전가이득출연구구적침적모식。
Tiebiancheng is located in the county of Wuqi, in Western of the northern slope in Erdos basin structure.Based on the logging facies analysis and core observation of rock facies marker,Through the sand ratio distribution and single well profile sequence analysis, inte- grated research on sedimentary facies types and development in the reservoir of Chang 8 in Tiebiancheng area, Erdos basin. The results show that the main sedimentary system belongs to the＂ shallow＂ lake delta sedimentary system, developed delta plain and delta front subfacies, the main microfacies types including delta plain distributary channel, interdistributary, natural levee microfacies and delta-front underwater distributary channel, interdistributary bay, water natural levee.