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Reservoir Protecting Agent for Ultra-low Permeable Formation—JHSP 2014-01-23 12:03:34 e film can be removed due to the effects of upward pressure, oil soluble and water soluble and protect reservoir.Usage
Please add 2～3% of JHSP into mud when drilling the layer being 50m.
Main Quality Indexes
ITEM
INDEX
extrinsic features
dustcolor or yellowish brown powder
screen residue ratio (0.45mm)/ (%)
≤10
water content /(%)
≤10
pH(1% in solution)
6～9
API filter loss in 2% water based mud (ml/30min)
≤10
depth of penetration
(2%, 0.69MPa, 20～40 mesh sand bed, 1min)
≤10
filter loss
(2%, 3.5MPa, 20～40 mesh sand bed, 1min)/(cm)
≤40
oil soluble ratio in ligroin under room temperature /(%)
≥20
acid soluble ratio in 15% HCl under room temperature /(%)
≥40
fluorescence level
≤4
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