Harmless oily sludge treatment technology and its application

A full investigation on the source of oily sludge, storage condition and treatment was carried out, and the technical thinking about sludge harmless treatment of oily sludge was presented. According to the characteristics of sludge formation screening emulsifier, oily sludge profile control agent and the design method of sludge profile control process were formed. This technology was applied in 14 wells of the low permeability reservoir, and the effect was obviously. The cumulative treatment of oily sludge was 4 260 t, cumulative increasing oil production was 850 t, and the amount of water reduction was 6 400 m³. The sludge profile control agent replacing the particulate plugging agent could save cost, the input-output ratio was 1:2.2, and economic benefit is obvious. This technology can solve the problem of sludge pollution and utilization, and has significant application value.