Laojunmiao Oil Production Plant of Yumen Oilfield Adopts New Technology to Treat Underinjection Wells
Laojunmiao Oil Production plant of Yumen Oilfield applied sandless fracturing technology in the treatment of difficult high-pressure under-injection Wells. As of October 9, 11 Wells had been implemented on site this year, with an average daily injection increase of 148 cubic meters, helping the old reservoir to increase production and efficiency.
Sandless fracturing technology is a physical way of plugging removal. In the absence of proppant, hydraulic injection does not exceed the fracturing pressure of the reservoir to dreg the original percolation channel of the formation. Without changing the formation structure, the micro-fracture network is formed, the void volume around the well is increased, the fracture with conductivity is created, and the absorption capacity of the injection well is improved.
Laojunmiao Oil Extraction plant in the implementation of measures, adhere to the "efficiency of the policy", based on the physical characteristics of different reservoirs, combined with production dynamics, previous measures and other factors, taking into account the protection of oil and gas reservoirs, the formation produced water as the fracturing fluid. In response to the risk of sand production, technicians used sand reinforcement agents in the measures to prevent sand production and extend the reaction bonding time. Under the condition of considering the starting pressure, after fracturing, the diffusion pressure should be placed to the pump pressure level of the branch line, which can effectively avoid sand production after measures. The implementation of this technology can increase the injection water of the reservoir, supplement the formation energy, and provide a new idea for the treatment of underinjection Wells.
