中文摘要：

中国页岩气资源丰富，已在多个地区获初步发现，其中中国南方古生界寒武系、奥陶系和志留系中发育多套海相富有机质页岩，技术可采资源量占全国的3／4，将是重点开发地区。与北美相比，中国南方海相页岩气储集层具有构造改造强、地应力复杂、埋藏较深、地表条件特殊等特点，照搬国外现有理论与技术难以有效开发。页岩气储集层纳米级孔隙对页岩气产能的影响尚不明确，页岩气产能预测方法尚未建立，钻井过程中水平段垮塌严重、钻井周期长，增产改造效果不理想、单井产量较低，需要针对纳米级孔隙成因及多尺度储集空间定量表征、复杂介质多场耦合非线性流动机理、页岩失稳与缝网形成的力学机制3个科学问题进行研究。表1参27

英文摘要：

Shale gas resources are abundant in China and have been discovered in some areas. They are widely distributed in the Cambrian, Ordovician and Silurian strata in Southern China, with technically recoverable resources accounting for 3/4 of the whole country. The Southern China will be the main area for shale gas development. Compared with North America, there are a lot of differences in shale gas exploration and development in Southern China which include intensive tectonic movements in marine shale, complex stress field, deep burial depth, special surface condition, etc. With those, it could be ineffective if the existing theories and techniques of shale gas developed in America are taken for granted. The effects of nano-pore formation on shale gas production are unclear; Prediction methods for shale gas production have not been established; In the process of drilling, the horizontal section collapses seriously and the drilling cycle is too long; Stimulation effect is not ideal, with low single well production. In order to effectively develop shale gas in Southern China, three scientific issues should be studied which include quantitative characterization of nano-pore formation and multi-scale storage space, mechanisms of nonlinear flow under multi-field coupling in complex medium, mechanical mechanisms of shale instability and fracture network formation.