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首页> 外文会议>International Symposium on Mine Safety Science and Engineering >Fracturing Mechanism of Difficult-to-Fracture Thin Poor Reservoir Layers and Controlling Measure
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Fracturing Mechanism of Difficult-to-Fracture Thin Poor Reservoir Layers and Controlling Measure

机译：难以裂缝薄储层层和控制措施的压裂机制

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摘要

It was used for development target of supplementary layers of production for the thin and poor reservoir layer, and it was considered as difficult-to-fracture layer as high calcium content and compact cementation, the emphasis was focused on study and application of fracturing technology in Daqing oilfield in this paper. The rock which was difficult to fracture had the characteristics of high density, high strength and impermeability, so it was difficult for the fracturing fluid to enter the formation. Therefore, it should firstly to overcome the wellbore stress concentration and when the fracture pressure was higher than thirty-seven MPa. The acidification treatment was used as the method of layer modification, through the method, the cementation among the rocks was destroyed and the tensile stress of the rock was decreased; the permeability near the well bore was increased and then, the fracture pressure would be decreased. For the section which had large difference value of fracturing pressure, rational design of sand volume in single slit should be by forecasting difference value of fracturing pressure. The single slit emission should to be higher than 0.5 m~3/min, and then it can ensure the normal construction under the conditions of present construction scale and adding sand program conditions.
机译：它用于薄型和差的储层层的补充生产层的发展目标，并且被认为是难以骨折层，作为高钙含量和紧凑的胶结，重点是研究和应用压裂技术大庆油田本文。难以破裂的岩石具有高密度，高强度和不渗透性的特点，因此压裂液难以进入形成。因此，首先应该克服井眼应力浓度，并且当断裂压力高于37MPa时。使用酸化处理作为层改性的方法，通过该方法，破坏了岩石之间的胶结，岩石的拉伸应力降低;孔孔附近的渗透率升高，然后，断裂压力会降低。对于具有压力压力差值较大差值的部分，单个狭缝中的沙子体积的合理设计应通过预测压裂压力的差值。单个狭缝发射应高于0.5米〜3 / min，然后可以确保在现有施工规模的条件下进行正常结构并添加砂计划条件。

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