The Use Characteristics of Petroleum Additives in Testing Petroleum Additives

The Use Characteristics of Petroleum Additives in Testing 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 use of petroleum additives：

1. Amount of leakage prevention1—2％。

2. Sealing severe leakage layer, dosage4—6％。

3. Seal the pores microcracks of the sand layer, protect the reservoir, use the required amount2—4％。