摘要
通过对川东北元坝地区长兴组-飞仙关组气藏成藏地质条件的分析,认为沉积相展布、储层岩性、储层成岩作用及古今构造的叠合是控制天然气分布和富集程度的主要因素。通过与普光气田的对比,综合认为元坝地区长兴组-飞仙关组气藏具备形成大中型气田的良好条件;但建设性成岩作用明显弱于普光地区,不利于次生孔隙的形成;同时,元坝地区缺乏烃源断层,限制了油气的运移和储层储渗性能的改善。因此,该气藏勘探开发潜力不如普光气田。
The Yuanba block of Northeast Sichuan is another important exploration region after the discovery of the Puguang gas field. Commericial gas flows have been obtained from Changxing Formation and good oil and gas shows from Feixianguan Formation. This paper considers that the distribution of sedimentary facies, the reservoir lithology, the reservoir diagenesis and the superposition of the ancient and modern structures are the main factors to control the natural gas distribution and the enrichment degree of Changxing-Feixianguan Formation. The Changxing- Feixianguan Formation gas pool in the Yuanba block has essential conditions to form large and medium gas fields. However, its constructive diagenesis is weaker than that in the Puguang area. This goes against forming secondary pores. Meanwhile, the Yuanba block lacks hydrocarbon source faults, which restricts the oil ; gas migration and the improvement of storage and permeability behaviors of the reservoir. Therefore, exploration potential of the Changxing-Feixianguan Formation gas pool is not as good as that of the Puguang gas field.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第4期419-423,共5页
Journal of Chengdu University of Technology: Science & Technology Edition
关键词
川东北地区
长兴组
飞仙关组
成藏
主控因素
勘探潜力
northeast Sichuan
accumulation
main Changxing Formation
Feixianguan Formation
hydrocarbon controlling factor
exploration potential
