中国碳酸盐岩油气勘探与白云岩研究最新成果:第17届全国古地理学及沉积学学术会议成果综述

Recent achievements in carbonate oil and gas exploration and dolomite research in China:a summary of results of the 17th National Conference on Palaeogeography and Sedimentology

简述了第17届全国古地理学及沉积学大会碳酸盐岩油气勘探、白云岩、深层碳酸盐岩尤其是白云岩成因理论研究新成果。统计含55个口头报告和15个展板;涉及塔里木、四川、鄂尔多斯、柴达木、吐哈和渤海湾等盆地白云岩成因与成储;深层、万米超深层白云岩规模储集层形成、表征和保存机制;生物岩和碳酸盐岩形成过程的定量评价等。值得推荐10000 m超深层白云岩优质储集层特征和成因机制研究,坚持提出万米超深层白云岩勘探建议,成为白云岩成因理论研究指导生产实践的代表性成果,是2022年国际沉积学大会及近年国际白云岩成因基础研究成果应用薄弱环节补充;有关四川盆地深层白云岩储集层特征和成因机制的研究来自不同院校项目成果的总结。提出了深层白云岩成因成储、万米超深层白云岩优质储集层评价与勘探理论;尤其激光剥蚀等离子体质谱U-Pb定年技术得到普遍应用,实现了地质时期白云化作用特征和成因机制的定性定量分析;生物岩的讨论颇具特色;这些内容分别代表沉积学—岩相古地理学—矿物岩石学—新技术和白云岩成因理论研究与实际应用紧密结合成果,总体创新深度、研究手段、系统理论和在油气勘探部署中的应用特征显著,是本次学术会议亮点。不足之处:仅见1篇海洋岛礁白云岩论文出现在展板中,预期18届克拉玛依会议将进一步深化上述领域的研究,海洋岛屿白云岩研究专题将备受重视。

This paper briefly describes the new achievements of oil and gas exploration in carbonates,deeply buried carbonate rocks,especially the genetic theory of dolomites at the 17th National Congress of Palaeogeography and Sedimentology.The relevant theme includes 55 oral presentations and 15panels,which are related to(1) the genesis and reservoir of dolomite in Tarim,Sichuan,Ordos,Qaidam,Tuha and Bohai Bay basins,(2) formation,characteristics and preservation mechanism of deep and ultra-deep dolomite reservoirs,and(3) quantitative evaluation of bioliths and carbonate f'ormation processes.It is worth recommending the study on the characteristics and genetic mechanism of high-quality,ultra-deep(10 km) dolomite reservoir,Exploration of the ultra-deep dolomite has become a representative result of the genetic theory of dolomite,guiding production practice.It is a supplement to the weak link in the application of basic research of dolomite genesis in the 21st International Sedimentology Congress(2022,Beijing) and in recent years.The summary of the characteristics and genetic mechanism of deep dolomite reservoirs in various parts of the Sichuan Basin comes from graduate students' summary of the results of different university projects,which is very valuable.The theory of formation of deep dolomite reservoir,evaluation and exploration of high-quality ultra-deep dolomite reservoir is put forward.In particular,the laser ablation plasma mass spectrometry U-Pb dating technique has been widely used,which has realized the qualitative and quantitative analysis of the characteristics and genetic mechanism of dolomitization in geological time.The discussion of biolith is characteristic.They represent the close integration of sedimentology,lithofacies and paleogeography,mineralogy and petrology,new technology and dolomite genetic theory and practical application.The overall innovation depth,research means,system theory and application characteristics in oil and gas exploration deployment are significant,which is the highlight of this conference.Shortcomings are represented by the only one poster on marine reef dolomite.It is expected that the 18th Karamay Conference will further deepen the research in the above fields,and the topic of marine island dolomite research will be paid more attention.