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鄂尔多斯盆地具有丰富的致密油资源,渗透率小于1×10~(-3)μm~2的储量占52.56%。利用水平井开发并进行分段多簇压裂是长庆油田动用这部分储量的关键。本文以盆地内典型致密油藏华庆油田长63储层为研究对象,建立了区块的特征模型。在所建模型的基础上,分析7种单因素(水平段长度、压裂缝段数和段间距、段内多簇缝的簇数和簇间距、压裂缝的缝长和导流能力)对压裂效果的影响规律。最后,利用实际生产数据和数值模拟两种方法,分析对比分段压裂和分段多簇压裂两种水平井改造工艺的增产效果。并进一步解释分段多簇压裂施工时存在的多簇缝不能同时起裂现象。
The Ordos Basin is rich in tight oil resources, accounting for 52.56% of the total reserves with permeability less than 1 × 10 -3 m 2. Using horizontal wells to develop and carry out multi-cluster fracturing is the key to the utilization of this part of reserves in Changqing Oilfield. In this paper, the Chang 63 reservoir of Huaqing Oilfield, a typical tight oil reservoir in the basin, is selected as the research object, and a model of the block is established. Based on the model built, the effects of fracturing on the fractures of fractures were analyzed on seven single factors (length of horizontal section, number of fracture sections and interval, number of clusters and cluster spacing of multi-cluster sections, length of fractures and conductivity) Effect of the law. Finally, the actual production data and numerical simulation are used to analyze and compare the stimulation effects of the two horizontal well modification processes. And further explain the multi-tuft fracturing that can not occur simultaneously in the multi-cluster fracturing construction.