Abstract: Three sets of bathyal lacustrine organic-rich shale are developed in the Jurassic of Sichuan Basin, characterized by superposed development and broad distribution; the bathyal lacustrine shale is characterized by "high TOC, high porosity and high gas content". Recently, new breakthroughs have been made in the exploration of continental shale oil and gas in multiple wells and sections of the Jurassic in Sichuan Basin, boasting of great exploration potential and abundant resources, which are key replacement resources instead of the marine shale gas in Wufeng Formation and Longmaxi Formation. Through comprehensive evaluation of fine-grained rocks, it is found that the continental shale oil and gas have strong heterogeneity. On this basis, a quaternary lithofacies division scheme was established to clarify the main controlling factors for the enrichment and high production of continental shale oil and gas. Specifically, the bathyal lacustrine organic-rich shale provides the material base, good tectonic preservation and high-pressure conditions are the key conditions, appropriate thermal evolution and microfracture development are conducive to hydrocarbon enrichment and flow, and the geology-engineering integrated research can guarantee high production. The Jurassic continental shale oil and gas resources have great potential, with the natural gas equivalent of 6.0×10¹²m³, accounting for 27.7% of the total natural gas resources in Sichuan Basin. This is an important field for increasing reserves and production during the "14th Five-Year Plan" period (2021-2025). Multilayer superimposed shale is developed and bathyal lacustrine shale distributes extensively in northeastern Sichuan, which are important favorable zones for exploration. Sinopec has the total natural gas resources of 2.94 × 10¹²m³ and crude oil of 12.03×10⁸ t in these areas, which are important replacement resource fields for oil-gas exploration and development in Southwest China. The exploration and development of continental shale oil and gas in Sichuan Basin is still in the early stage, and there are still deficiencies in research of fine-grained rock sedimentary reservoirs, reservoir properties, main controlling factors of enrichment and high production, and applicable engineering fracturing technology. It is still necessary to make more efforts to tackle key scientific and technical problems and practice deeply, and strive to achieve greater breakthroughs in the exploitation of continental shale oil and gas in Sichuan Basin during the "14th Five-Year Plan" period and increase reserves and production on a large scale.

Key words: Sichuan Basin, Jurassic, continental shale, enrichment conditions, favorable areas for exploration and development

摘要： 四川盆地侏罗系发育3套半深湖亚相富有机质页岩，具有叠置发育、广覆分布的特征，半深湖亚相页岩具有"高TOC、高孔隙度、高含气量"的特点。四川盆地侏罗系多口井、多个层段的陆相页岩油气近期取得勘探新突破，勘探潜力巨大、资源丰富，是继五峰组—龙马溪组海相页岩气之后的重点资源接替领域。经过细粒岩综合评价研究发现其具有强非均质性，通过建立"四元"岩相划分方案，明确了陆相页岩油气富集高产主控因素：半深湖亚相富有机质页岩提供了物质基础、良好的构造保存及高压条件是关键、适宜的热演化程度及微裂缝发育有利于油气富集及烃类流动、地质—工程一体化研究是高产的保障。侏罗系陆相页岩油气资源潜力大、天然气当量为6.0×10¹²m³，占四川盆地天然气总资源量的27.7%，是"十四五"（2021—2025年）期间增储上产的重要领域。川东北地区多层页岩叠置发育、川南地区半深湖亚相页岩大面积展布，是重要的勘探有利区，其中，中国石油化工集团有限公司所属矿权区的天然气总资源量为2.94×10¹²m³、原油为12.03×10⁸t，是西南地区油气勘探开发的重要资源接替阵地。四川盆地陆相页岩油气勘探开发仍处于初期，在细粒岩沉积储层、油气藏性质、富集高产主控因素、适应性的工程压裂改造技术等多方面仍存在不足，尚需加大科技攻关及深入实践，力争实现"十四五"期间四川盆地陆相页岩油气的更大突破及规模性增储上产。

关键词: 四川盆地, 侏罗系, 陆相页岩, 富集条件, 勘探开发有利区