砂砾岩油藏分段压裂选层组合及裂缝参数优化方法

Layer Selection Combination and Fracture Parameter Optimization Design of Staged Fracturing in Glutenite Reservoir

为了保持胜利油田的稳产增效,对深层砂砾岩油藏采取分段压裂技术开发是必不可少的措施,而深层砂砾岩储层分段压裂的关键在于如何进行选层组合以及裂缝参数优选。通过收集和统计现场分段压裂施工井例数据,得到一个关于分段数和储层跨度的经验关系式;应用灰色关联度法对能够反映储层性质的储层岩性、物性以及岩石力学参数进行综合评价,根据灰色关联度大小进行储层组合划分,其结果与根据测井资料得到的划分结果一致;利用CMG软件建立了深层砂砾岩储层分段压裂生产模型,并以产能为优化目标对各压裂段的裂缝导流能力和缝长进行了优选。

In order to maintain the stable production and increase efficiency of Shengli Oilfield,it is necessary to develop the deep glutenite reservoir by staged fracturing technology.The key of staged fracturing of deep glutenite reservoir lies in how to select the formation combination and optimize the fracture parameters.This paper obtains the empirical relationship between number of segments and span of reservoir by collecting and counting the data of staged fracturing wells in the field.Method of grey correlation degree is used to comprehensively evaluate the reservoir lithology,physical properties and rock mechanical parameters that can reflect the reservoir properties in this paper.The reservoir combination is divided according to the grey correlation degree and the result is consistent with that obtained from logging data.The staged fracturing production model of deep glutenite reservoir is established with CMG software,and the fracture conductivity and fracture length of each fracture section are optimized with productivity as the optimization objective.