辽河油田欧利坨子地区火山岩储集层特征及有利储集层预测

Volcanic rock reservoir characteristics and prediction in Oulituozi region, Liao he basin.

欧利坨子地区火山岩储集层的岩石类型以粗面岩为主 ,储集层的储集空间由构造裂缝、风化裂缝、各种溶蚀孔洞和气孔组成。储集层的性质与裂缝的发育程度密切相关 ,与裂缝相连通的气孔和半充填的杏仁孔才可能成为有效的储集空间 ,因此常规的测井解释不能客观地反映火山岩储集层特性。针对该区火山岩储集层的特征 ,在进行储集层参数解释时 ,应用裂缝孔隙度表征储集层物性 ,对测井资料进行了特殊处理 ,得到了与试油一致的结果。本项研究不仅在本区识别出 3个新的优质储集层发育段 ,而且为指导生产提供了一种有效手段。

T rachyte is the main rock type of volc anic rock reservoir in Oulituozi region. The accumulation volume of the reservoi r consists of structure crack, weathering crack, various solution pore and cave and vesicle. Comprehensive study indicates that the reservoir characteristics as sociate with the development of crack. Vesicles and half filled amygdales can b e effective accumulation volume only when they connect with cracks. Because of th e speciality of the reservoir, normal log interpretation couldn't give a subject ive reflection of reservoir characteristics. According to the reservoir speciali ty, we interpret the log data with a special process, and the result is consiste nt with oil test, at the same time, the method is effective for oil production.