基于试井数据的低流度储层增产措施选层方法研究

压力酸化是低流度油气藏进行改造的主要措施,储层物性、措施选层和措施设计是影响增产措施能否获得成功的重要因素。在实际生产中,油田主要依靠经验来进行措施选层,为了避免措施选层的盲目性和主观性,提出了一种基于试井数据的增产措施选层方法。首先,以试井参数流度为标准,将低流度储层分类四种类型;以南堡油田为例,对每一种类型储层的试井曲线特征和储层特点与增产措施效果进行了分析对比,建立了低流度储层增产措施的选层方法。采用该方法在华北油田二连探区乌兰花凹陷和南堡油田优选了10个层,措施后效果均与措施选层结果相吻合。研究表明该方法能够适用于砂岩岩性的低流度油田,具有普遍性和可移植性。

Stimulation Layer Candidate Selection Method Based on Well-Testing Data for Low Mobility Reservoir

Fracturing and acidizing are the primary stimulation measures reform for low mobility reservoir. There are some factors such as formation property, layer candidate selection and stimulation design to influence to effect of stimulation. During oilfield production, stimulation layer candidate selection was often on the basis of the engineers" experience, which would bring about the blindness and subjectivity. Therefore, a stimulation layer candidate selection method based on well-testing data for low mobility reservoir was proposed. Firstly, the low mobility reservoir could be classified into four types on the basis of mobility, which is one of well-testing interpretation parameters. Taking Nanpu oilfield as an example, the relationship of reservoir parameters and stimulation effect of these four types of reservoir was analyzed and compared. Then, a low mobility reservoir stimulation layer candidate selection method was founded. This method was used to select 10 layers for Wulanhua depression of Huabei oilfield and Nanpu oilfield and the effect of stimulation was conformed to the selecting result. It is demonstrated that this method can be applied to the low mobility oil fields of different lithologies, which is universal and portable.