Causes Analysis and Technical Countermeasures of Sand Plug in Coal-bed Hydraulic Fracturing Construction in Baode Block

Abstract:

Sand plug occurred in the fracturing process of low and middle rank coal reservoir in Baode block, which affected the reservoir reconstruction. Based on the geological features of this block, combined with the extension law of hydraulic fracturing in coal seams, the main factors caused sand plugging are analyzed, such as the increase of fracturing fluid loss caused by development of coal reservoir fractures and high permeability roof and floor fracturing and so on. The corresponding technical countermeasures are put forward on this basis, by using clean fracturing fluid, appropriately increasing and stabilizing the fracturing fluid displacement in construction and optimizing fracturing design, the reservoir reconstruction effect can be improved.