塔河油田奥陶系潜山碳酸盐岩储层特征及测井评价技术

新疆塔河油田储集层为下奥陶统风化壳，以裂缝溶洞型储集层为主。影响储集空间性能的主要因素是构造应力和风化淋滤作用。该类储集层的特点是储集空间类型多，复杂，非均质性极强，储集层评价困难。从基础测井资料入手，分析了该类储集层的储层特征，并运用岩心分析技术、交会图技术、经验公式等方法建立了储层孔、渗、饱参数的解释模型，利用Petrophysics软件包实现了裂缝溶洞型潜山油藏的储层参数测井定量解释，初步形成了该类储集层的测井评价方法，实际应用效果比较显著。

Carbonate Reservoir Features in Buried Hill of Ordovician System in Tahe Oilfield and Their Log Evaluation

Reservoirs in Tahe Oilfield, located in Xinjiang, are formed by the weathered crust in Lower Or-dovician, primarily being fractured and carven ones. The main effects on the reservoir space are the structural stress, weathering and leaching. This type of reservoir is characterized by various complex pores and severe heterogeneity. Hence it is difficult to evaluate them. Based on the basic logging data, this paper has analyzed the characteristics of this type of reservoir and developed the interpretation model of the reservoir parameters such as porosity, permeability and saturation by use of the techniques such as core analysis, cross plots, empirical equation, etc.. Petrophysics software package has been used to quantitatively analyze the parameters of the buried hill reservoir with fractures and caves based on logging data. A set of principal techniques of reservoir log evaluation have been developed and obtained a satisfied result in practice.