Research on carbonate reservoir sand-up fracturing technology and its application in Dagang Oilfield

Acid carbonate reservoir pressure is an important means of reconstruction, but acid pressure has defects such as large acid filtration; discontinuous crack sewing; hard to form long deep closed penetration and so on. Carbonate reservoir sand-up fracturing was attempted in home and abroad research areas. Some corresponding countermeasures have been put forward through summing up the difficulty in adding sand into carbonate reservoir; strengthening transformation objective petro-physical property material research improving function of the evaluation and guidance about the small fracturing reduce fracture fluid filtration; improving the fracturing fluid efficiency and acid solution treatment + Na2C03 liquid mat technology before the Lord's lead acid fracturing; optimizing the construction technology and research the new fracturing fluid. These countermeasures have been successful applied in Dagang Oilfield in 4 Wells times and obtained good effect.