PROGRESS IN GEOLOGICAL RESEARCH METHODS AND EXPLORATION EVALUATION OF CONTINENTAL SHALE OIL IN SONGLIAO BASIN
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摘要:
针对陆相页岩油储层结构非均质性强、孔隙结构复杂、产能主控因素不明等勘探开发面临的挑战和技术瓶颈，建立了有机、无机地球化学与沉积学结合的陆相细粒沉积旋回及古环境演化重建的沉积地球化学方法，厘清了古水体性质与矿物组成、有机质富集的响应关系；建立了陆相富有机质页岩岩相划分标准和测井识别方法，分析了细粒沉积储层结构非均质性；厘清了泥页岩层系裂缝类型及分布规律.基于能量演化理论，建立了页岩储层脆性评价模型，并采用人工智能方法，建立了含油性地质甜点和脆性工程甜点评价方法.
Abstract:In view of challenge and technical bottleneck in the exploration and development of continental shale oil, such as significant heterogeneity of reservoir structure, complex pore structure and unknown major controlling factors of productivity, the paper establishes the sedimentary geochemical method to reconstruct the continental fine-grained sedimentary cycle and paleoenvironmental evolution by combining organic and inorganic geochemistry with sedimentology, and discusses the response relation between paleowater property and mineral compositions as well as organic matter enrichment. By the lithofacies division standard and logging recognition method of continental organic-rich shale, the paper analyzes the heterogeneity of fine-grained sedimentary reservoir structure, and clarifies the fracture types and distribution rule of shale layers. Finally, the brittleness evaluation model of shale reservoir is built based on energy evolution theory, and the evaluation method of oil-bearing geological sweet spot and brittleness engineering sweet spot are established through artificial intelligence method.
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