Henan Oilfield's new coated sand technology was patented

Recently, "a low-temperature solidified oil-permeable and water-blocking coated sand and its preparation method" declared by Henan Oilfield obtained the invention patent authorization of the State Intellectual Property Office
.

The temperature of the unconsolidated sandstone reservoir in Chunguang Oilfield of Henan Oilfield is 40-50 degrees Celsius, the diagenetic strength is low, the production of fine silt is serious, the validity period of mechanical sand control is short, the loss of chemical sand-fixing permeability is large, and the risk is high
.
The consolidation temperature of the commonly used coated sand in China is relatively high, which cannot meet the needs of low-temperature consolidation for sand control and water resistance
.

In this regard, the technicians optimized the resin, hydrophobic material and curing agent based on the hydrophobic mechanism of the contact interface of the hydrophobic material, the softening film of the modified resin and the curing of the modified epoxy curing agent in a low temperature and water environment, and developed a low-temperature curing agent.
Coating formula and coating process, trial-produced low-temperature cured oil-permeable and water-blocking coated sand, which can form a high-strength sand-blocking barrier and oil-permeable water-blocking zone of more than 0.
5 meters near the wellbore, prolong the validity period of sand control, and reduce the water content of a single well
.

The invention patent has been applied in Chunguang Oilfield of Henan Oilfield for 4 well times.
After the construction, the sand retaining pipe was omitted in the oil well production, and the normal production was restored.
The validity period of sand control is more than 180 days
.