二连盆地哈南凝灰岩油藏裂缝发育特征

FRACTURE DEVELOPMENT OF TUFF RESERVOIRS IN THE HANAN AREA OF THE ERLIAN BASIN

梁官忠

LIANG Guan-zhong

中国石油华北油田二连分公司, 内蒙, 锡林, 026000

Erlian Branch, North China Oil Field, CNPC, Xilin, Inner Mongolia 026000, China

针对凝灰岩油藏特殊的地质特征及开发特征,开展了储层岩性电性特征、储集空间及类型、储层分布发育规律等研究,重点探讨了裂缝的分布发育规律、影响裂缝发育的主要因素,以及裂缝对储层及产层的影响.分析认为,潜山风化壳带内出露地层为Ⅱ油组中性凝灰岩的东部地区裂缝、储层发育,是油藏的主力储层及产层分布区.裂缝提供了油藏主要的储集空间和渗滤通道,并使其成为具有裂缝型油藏开发特征的孔洞裂缝型油藏.

In view of characteristics of tuff reservoirs,the electric response,resevoir space and type and development of reservior were studied;the development and distribution of fractures and their influential factors were analysed;and influence of fractures on reservoirs and producing formation was discussed.It showed that the play Ⅱ of intermediate tuff developed in wheathering zone of buried-hills of the eastern area possessed good fractures and reservoirs,where was the habitat of principle hydrocarbon accumulation.The fractures provided suitable reservoir space and passway for hydrocarbon migration,so oil and pools were formed.

https://doi.org/10.11781/sysydz200104412