FRACTURE DEVELOPMENT OF TUFF RESERVOIRS IN THE HANAN AREA OF THE ERLIAN BASIN
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摘要: 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.Abstract: 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.
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Key words:
- geological characteristics /
- fracture /
- reservoir /
- tuff
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[1] 孙鼐,彭亚鸣.火成岩石学[M].北京:地质出版社,1985. [2] 赵跃华,李显路,张燕.安棚深层系储层特征及裂缝分布规律[J].大庆石油与开发,1999,18(6):9-11. [3] 柏松章,唐飞.裂缝性潜山基岩开发模式[M].北京:石油工业出版社,1997. -
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