基于常规测井的花茶油田碳酸盐岩储层评价技术

Carbonate reservoir evaluation in Huacha Oilfield based on normal logging

百色盆地花茶油田区块小、断块多,其碳酸盐岩储层以裂缝溶洞型为主。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,横向可对比性较差,对其储层的正确评价比较困难。从基础资料入手,分析该类储层特征,建立了储层的孔隙度、渗透率、饱和度参数的解释模型,实现了裂缝发育程度评价,使用数学方法研究出多种有效的流体性质判别方法,综合岩心的观察、测井新技术对该地区的碳酸盐岩储层进行研究和评价。初步形成了一套用常规测井资料综合评价花茶油田碳酸盐岩储层的技术,实际应用效果比较显著,满足油田开发的要求。

Huacha Oilfield in Baise Basin is small and has many small block faults, carbonate reservoirs of whic are primarily factured caverns. Fractured cavern carbonate 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 analyzes the characteristics of fractured cavern carbonate reservoir and develops the interpretation model of the reservoir parameters such as porosity, permeability and saturation, and evaluate fracture development. Multiple methods of distinguishing fluid properties has been researched by use of the mathematical method, and a set of principal techniques of reservoir log evaluation have been developed and obtains a satisfied result in practice, so that meet the requirement of the oil field exploration.