石油实验地质2016，Vol.38Issue(6)：703-712,10.DOI:10.11781/sysydz201606703
中国中西部大型盆地差异演化与碎屑岩油气响应
Differential characteristics of large-scale basin evolution and hydrocarbon response of clastic strata in central-western China
摘要
Abstract
Taking the petroleum accumulation system of clastic strata as the core, and the large⁃scale basins in the central-western China (Sichuan, Ordos, Junggar and Tarim) as a unified space-time system, we discussed the for⁃mation and distribution of accumulation systems and their petroleum response under the control of the superposition of basins since the Late Paleozoic. The formation and distribution of main hydrocarbon source rock strata, self⁃sourced and self⁃and⁃near⁃sourced petroleum accumulation systems were constrained by the differential structure of prototype compaction during a tectonic transition period. The self⁃and⁃far⁃sourced, externally sourced and hybrid⁃sourced petro⁃leum accumulation systems were controlled by the tectonic deformation caused by basin superposition. The superposi⁃tion of intercontinental systems in the Mesozoic to Cenozoic controlled petroleum behavior in different accumulation systems. First, differential tectonic subsidence which generated by foredeep overlap during a tectonic transition period controlled the formation of large lithologic hydrocarbon reservoirs and relative enrichment near tectonic uplift/slope zones in self⁃and⁃near⁃sourced petroleum accumulation systems. Second, the late Yanshanian uplift tilting made the early near⁃sourcing hydrocarbon reservoirs adjust or dilute. Finally, fault activities ever since the Yanshanian con⁃trolled the partial enrichment and high⁃yielding of hydrocarbon in self⁃sourced petroleum accumulation systems, and the formation of self⁃and⁃far⁃sourced and externally sourced petroleum accumulation systems. The self⁃and⁃near⁃sourced and self⁃sourced petroleum accumulations in the Yanshanian uplift or slope are the main hydrocarbon explora⁃tion targets in clastic strata in the central basin. In the western basin, we should focus on the externally⁃sourced and self⁃and⁃far⁃sourced petroleum accumulation systems on the compression⁃wrench fault belts of active uplifts.关键词
成藏体系/盆地原型/油气响应/碎屑岩层系/中国中西部Key words
petroleum accumulation system/basin prototype/petroleum response/clastic strata/central-western China分类
能源科技引用本文复制引用
方成名,黄泽光..中国中西部大型盆地差异演化与碎屑岩油气响应[J].石油实验地质,2016,38(6):703-712,10.基金项目
国家“十二五”重大科技专项“大型油气田及煤层气开发”（2011ZX05002－006）和中国石化科技项目（P15098）资助。 （）
