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Fracturing Flooding EOR
Overview

"Fracturing" refers to hydraulic fracturing, "flooding" refers to chemical flooding. Fracturing flooding EOR technology has two types: forward and reverse. Forward F-F EOR technology, aiming at the extremely low permeability injection-production imbalance oil field, the remaining oil is difficult to recover Use of high flow rate and pressure equipment, pumping a large amount of water, to provide energy for the oil Wells, and improve the oil recovery. Reverse F-F EOR technology, the oil well is operated according to the mode of "fracturing - flooding - injection - production". After stimulation treatment, the injection well is restored to normal injection, so as to realize effective development of remaining oil.

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Low permeability sandstone reservoir
Injection-production pattern of oil field with no or poor efficiency and low production degree
Forward F-F EOR technology
Higher injection pressure is needed, increasing the injection pressure from 30 MPa to 45 MPa or more
It breaks the conventional water injection method and overcomes the problem injection and production in low permeability reservoir block
Enlarging pore throat radius, increasing percolation distance, redistributing remaining oil, and quickly and effectively replenishing formation energy
Reverse F-F EOR technology
Wide spread range, low seepage resistance, small loss along the way and high operation efficiency
Capable of water flooding development in extremely low permeability blocks
Replenish formation energy while flushing pore remaining oil
At present, the fracturing flooding technology has been implemented in Tuha oilfield, Jilin oilfield, Tarim oilfield and Shengli oilfield for more than 100 Wells.
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