含油气细粒沉积岩研究的几个问题

Several issues in sedimentological studies on hydrocarbon-bearing fine-grained sedimentary rocks

细粒沉积岩在沉积岩中占有重要地位,但由于其看似"简单"而往往被忽略;同时受超微观实验条件的限制,细粒物质的沉积、成岩作用成为沉积学界乃至于地质学界研究相对薄弱的领域。随着页岩油气勘探开发的不断深入,细粒岩沉积学研究愈来愈受到重视。然而,目前细粒沉积岩研究中还存在诸多不规范和需要进一步深入之处。未来的研究应当综合利用沉积学、储层地质学及地层学相关理论知识,结合高精度的观察手段、地球物理识别技术、实验模拟等方法,探索理论突破与方法创新,规范细粒沉积岩相关概念及术语,建立系统、科学的细粒沉积岩分类方案,明确细粒物质沉积、成岩动力学过程,建立针对深水细粒物质的研究规范。在研究中应当重视学科交叉及科学研究与工业价值间的关联,使得细粒岩沉积学这一薄弱领域得到广泛关注,并取得突破性进展,更好地服务于页岩油气勘探开发。

The fine-grained sedimentary rock has an important position in sedimentary rocks, but it has been often overlooked because of its seemingly simple appearance. Meanwhile, due to limitation of ultra-microcosmic experimental conditions, deposition and dia- genesis of fine-grained sediments remain a relatively weake research field in sedimentology, even in geology. With exploration and development of shale oil and gas, the study of fine-grained sedimentary rocks becomes increasingly urgent. However, there are sev- eral issues deserving of attention in the current study, such as to utilize sedimentology, reservoir geology and stratigraphy compre- hensively, to combine high-resolution observation instruments with geophysical recognition techniques, experimental simulation and other methods, to search for theoretical breakthrough and method innovations, the standardize the related concepts and terminology of fine-grained sedimentary rocks, to establish systematic and scientific classification schemes of fine-grained sedimentary rocks, to reconstruct dynamic processes of fine-grained material deposition and diagenesis, and to set up stratigraphic specification of deepwa- ter fine-grained materials. In addition, a great emphasis should be placed on interdisciplinary researches and association between sci- entific significance and industrial value so as to make fine-grained sedimentary rocks receive extensive attention, gain breakthrough in progress, and serve shale oil and gas exploration and development better.