The Use Characteristics of Petroleum Additives

   The unidirectional pressure sealing agent DF-1 used in drilling fluid as a petroleum additive is suitable for the filtration of porous micro fractured formations in different situations during drilling. The good compatibility of this product is suitable for different systems densities of drilling completion fluids, achieving effective sealing of micro crack leakage, improving mud cake quality, reducing water loss. The recommended dosage for this product is 4%.

Physical chemical properties: Appearance: Grey white powder, fineness: 40 mesh, water content: ≤ 14%, pH value: 7-9.

    Mud performance: project base mud

    Base slurry＋4％801

    density，g／cm3：1.03≤1.03

    Apparent viscosity，mPa.s：7-10≤11

    Plastic viscosity，mPa.s：6-9≤10

    API water loss，ml：15-17≤10

    Closed filtration loss，ml／30min

    Total loss≤50

    characteristic： 

    1. affected by electrolyte pollution, non-toxic harmless.

    2. Fast plugging speed good effect for pore micro crack leakage.

    3. It can significantly reduce the filtration loss of mud without affecting its rheological properties, has excellent temperature resistance.

    4. It can quickly form a non permeable shielding belt with a certain strength to prevent liquid solid phases entering the reservoir, preventing damage to the reservoir. The shielding belt can be released through perforation reverse discharge.

    Method of using petroleum additives:

    1. 1-2% of leakage prevention dosage.

    2. Seal the severe leakage layer with a dosage of 4-6%.

    3. Seal the pores microcracks of the sand layer, protect the reservoir, with a dosage of 2-4%.