运用成像测井评价沙雅隆起北部潜山油气藏白云岩储层

Imaging Logging is Used to Evaluate The Dolomite Reservoir of The Buried Hil Reservoir in The Northern Shaya Uplift

沙雅隆起北部潜山油气藏白云岩储层裂缝、溶蚀孔洞发育,是主要的储集层段。常规测井资料在评价缝洞型储层时存在一定的多解性,运用XRMI成像测井则能准确识别裂缝类型,计算裂缝产状以及分析溶蚀孔洞发育情况。通过对成像测井资料的研究表明,白云岩储层裂缝为未被充填的高导缝,主要的类型有斜交缝、网状缝与高角度缝,将白云岩储层划分为裂缝型、孔隙型与孔隙—裂缝型三种类型。利用裂缝充填度以及裂缝走向与地层现今最大水平主应力方向的关系进行分析可知,裂缝的有效性好,是主要的储集空间及渗滤通道。

The dolomite reservoir of buried hill reservoir in the northern of Shaya uplift is major reservoir section which is mainly composed of fractures and dissolution pores. Conventional logging has certain multiple solutions when evaluating fracturevuggy reservoir. XRMI imaging logging can be used to accurately identify fracture types,calculate fracture occurrence and analyze the development of dissolution pores. The research on imaging logging data shows that fractures in the dolomite reservoir are highconductivity fractures which are unfilled,and the main types are oblique fractures,reticular fractures and high-angle fractures. The dolomite reservoir is divided into fractured reservoir,porosity reservoir,and porosity - fractured reservoir. It can be seen from the analysis of fracture filling degree and the relationship between fracture strike and the direction of the maximum horizontal principal stress of the formation at present that the fracture is effective.