柴达木盆地西部生物礁的识别与测井解释

Logging Response and Interpretation on Reef in Western Qaidam Basin, China

柴西地区发育了储集物性极好、分布较为广泛、储量较高的生物礁储层。通过岩心描述、测井分析,并根据国内外生物礁的分类标准认为,柴西地区的生物礁主要包括藻礁、叠层石和凝块石礁。生物礁储层的物性极好,储量较大,但湖相生物礁储层在柴西地区分布不均,变化很大,难以用传统的方法进行勘探和开发。根据岩心和测井数据系统总结了生物礁各种类型的测井响应,提出了适合柴西地区生物礁储层的测井曲线特征,为油田的勘探和开发提供参考。

Abundant and various reefs with conspicuous ph ys ical properties and high reserves have widely developed in western Qaidam basin. Based on the core description, logging analysis and classification at home and abroad, the reefs in western Qaidam basin may be classified into algal reef, str omatolites and thrombolites. Though better in property and richer in reserves, t he lacustrine reef reservoir in the basin is not homogeneous in distribution and varies in thickness, therefore it is hard to be explored and developed with tra ditional ways. Hererin, according to analyses of the drilling cores and correspo nding logging curves, several logging responses to the reef reservoir are worked out so as to provide reference information for the exploration and development of oilfield.