一种实用的砂砾岩储层有效厚度解释及评价方法

A kind of practical effective thickness interpretation and evaluation method for glutenite reservoirs

对于岩性、物性差异较大的砂砾岩储层,有效厚度解释划分的判别模式不能套用岩性物性相近较为简单的砂泥岩储层标准。为此,针对海拉尔盆地呼和诺仁油田南屯组砂砾岩储层的地质特点,综合分析了影响本区砂砾岩储层含油性的各种因素,优化合理的测井响应曲线,研制出集深侧向、岩性密度、声波时差和微球形聚焦等多参数于一体的油层有效厚度电性划分标准图版,该图版突破了以往单一的油层界限解释模式,图版精度明显提高;同时,将储层分为相对较好和相对较差的两类有效层,这一评价方法为油藏描述及产能评价奠定了基础。

Discrimination mode for effective thickness interpretation division of glutenite reservoirs with large differences between lithology and physical property is not simply based on criterions of sihstone reservoirs with similar lithology and physical property to use. Thus, aiming at geologic characteristics of glutenite reservoir in Nantun Formation of Huhenuoren oilfield of Hailaer Basin, various factors of influenced glutenite reservoirs containing oil property are analyzed, log response curve is reasonably optimized, and then standard plate of effective thickness electronic division of reservoir including several parameters, such as deep direction finding, lithologic denisity, acoustic travel time and micro-spherically focusing is developed. This plate breaks through traditional individual reservoir limitation interpretation mode and obviously advances accuracy. Meanwhile, according to reservoir two divisions which are better effective layers and worse effective layers, it provides a basis for reservoir description and production evaluation.