application scope
Bioenzyme unplugging technology is suitable for wells with organic blockage and inorganic carbonate blockage, where production is high at the beginning of production, the residual oil saturation is high, the water content of the well output rises quickly and the oil output drops sharply, the pumping equipment is complete and intact, and the wellhead installation can ensure normal production.
The construction mainly uses oil sleeve annular injection without moving the tubular column, but can also move the tubular column after the tubular injection according to the requirements.
technical characteristics
1、Good environmental protection, no need to return to the drainage;
2、Reducing the possibility of new blockage, improving permeability and infiltration, cleaning and lifting scale accumulation;
3、Good compatibility with formation fluids, strong prevention of both inorganic and organic scale, high efficiency of wax prevention;
4、The effect of oil washing and oil repelling is obvious, and the recovery efficiency is improved obviously;
5、A wide range of reservoir adaptability, (loose sandstone reservoir, low permeability reservoir, high mineralization reservoir, extra thick oil reservoir) good effect.
technical advantage
Compared with the traditional acidification and oxidant unblocking, the bioenzyme surfactant compound unblocking technology is safer, more environmentally friendly and more efficient, with a larger unblocking range and the effect of unblocking and oil washing at the same time. The bio-enzymatic surfactant system has a viscosity reduction rate of 85%, emulsification rate of 88%, interfacial tension reduction rate of 95.08%, and decongestion rate of more than 90%; 4 wells were decongested in the 10th oil production plant of Changqing Oilfield in 2018, with a cumulative oil gain of 1216.77t by 31 March 2020; 8 wells were decongested in the 10th oil production plant of Changqing Oilfield in 2019, with a cumulative oil gain of 2835t by 31 March 2020. The company has promoted the application of the measure more than 300 times in major oil fields, with an efficiency rate of more than 92% and a cumulative oil increase of more than 90,000 tonnes during the validity period.
