Progress and main achievements of public welfare oil and gas survey in Xinjiang
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摘要: 新疆地区油气资源潜力巨大,是我国陆上油气增储上产的重点地区。“十三五”以来,公益性油气地质调查按照“盆地综合研究选方向、基础地质调查定区带、战略选区研究求突破”的工作思路,以深层—超深层、山前复杂构造带和非常规页岩油气为重点,持续加大新疆地区油气基础地质调查投入和科技攻关力度,取得了塔里木盆地深层地质结构调查1项重大进展和温宿凸起新近系、沙井子构造带志留系、塔西南和塔东南坳陷山前带侏罗系和准噶尔盆地博格达山周缘非常规页岩油气等4项油气调查重大发现和突破,形成了温宿地区“古隆起差异沉降控储控藏”、沙井子构造带“断裂主控、多期充注、晚期为主”和博格达山周缘“深部源储一体、浅部构造-岩性为主、多矿种环带分布”等3项地质理论认识,形成了“盆地级骨干地震大剖面资料拼接处理”“复杂山前带地震资料叠前目标处理解释”“广域电磁剖面测量及综合解释”等3项关键技术。支撑新疆地区油气勘查开采体制改革试点工作取得实效,带动企业实现高效勘探开发,提升了盆地深层、山前带及非常规页岩油气成藏理论认识水平,促进了地方经济和社会发展。Abstract: The oil and gas resources in Xinjiang region has enormous potential, and it is a key area for increasing onshore oil and gas storage and production in China. The public welfare oil and gas geological survey has been carried out in accordance with the work concept of “basin comprehensive research direction selection, basic geological survey zoning, and strategic selection research for breakthroughs”, since the 13th Five Year Plan period, with a focus on deep to ultra deep layers, complex mountain front structural zones, and unconventional shale oil and gas. And the investment and scientific and technological research efforts of oil and gas basic geological survey in Xinjiang have been continuously increased. One major progress has been made in the investigation of the deep geological structure of Tarim Basin, and four major discoveries and breakthroughs have been made in the investigation of oil and gas, including Neogene in Wensu Uplift, Silurian in Shajingzi Structural Belt, Jurassic in the piedmont zone of Southwest Tarim and Southeast Tarim Depression, and unconventional shale oil and gas around Bogda Mountain in Junggar Basin. Three innovative geological theories were formed, including “differential settlement of ancient uplift controls reservoir control” in Wensu area, “fault dominated, multi-stage filling, and late stage dominated” in Shajingzi structural belt, and “deep source reservoir integration, shallow structure lithology dominated, and multi mineral ring distribution” around Bogda Mountain. Besides, three key techniques have been formed, including “basin level backbone seismic large profile data splicing and processing”, “pre stack target processing and interpretation of complex mountain front seismic data”, and “wide area electromagnetic profile measurement and comprehensive interpretation”. This work has achieved practical results in supporting the reform of the oil and gas exploration and extraction system in Xinjiang, and driven enterprises to achieve efficient exploration and development. And it also has improved the theoretical understanding level of oil and gas accumulation in deep basins, mountain front zones, and unconventional shale, and promoted local economic and social development.
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