Fracturing Flowback Fluid ReInjection Treatment
Our project site in Shannxi Province, China. This project is for oil fracflowback treatment, with capacity 50m3/h @ 24hrs running. This system is modular design, plugandplay, continous running, and resistance to low temperature environment.The #oilwastewater is transported from oil production plants to this site for centralized treatment, which saves the equipment investment and labor cost for the #oilandgasindustry.
In oil and gas extraction, fracturing technology is a conventional technical measure for increasing oil and gas well production. Simply put, it uses a high-pressure pump to press high viscosity liquid into the underground formation, forming formation fractures to facilitate oil and gas production. After successful fracturing, the fracturing fluid will return to the surface along with other underground fluids.
In order to improve the fracturing effect, the commonly used additives in the fracturing fluid are viscosity enhancers, such as hydroxyguar gum/Xanthan gum and polyacrylamide; Gel breaker: such as ammonium carbonate, Calcium oxide, etc; Buffer: Sodium bicarbonate, fumaric acid, etc; Clay; Stabilizers: calcium chloride, polyhydroxyaluminum, etc; Drag reducing agent: cationic polyacrylamide, etc. In addition, there are fungicides, etc. Due to the use of various additives in the fracturing fluid, the COD value of the backflow wastewater can reach over 10000mg/L, which poses difficulties in wastewater treatment.
At present, the main purpose of treating fracturing flowback fluid is to inject it back into the formation. Due to the one-time discharge of fracturing #flowbackwastewater, the water volume is not large and usually does not exceed 200m3. In addition, the well location of the oil well is dispersed, so it is required that the wastewatertreatment method and equipment should meet the requirements of the above characteristics. In order to achieve standard reinjection, our company has conducted comparative research on various wastewater treatment methods such as #coagulation, electrolysis, adsorption, and biochemical treatment. We believe that using oxidative coagulants for coagulation treatment can help improve treatment efficiency, electrolysis can improve the biodegradability of wastewater and remove #metalions, using adsorption methods can shorten biochemical treatment time, and using cultivated and domesticated microbial communities can improve wastewater treatment efficiency. A treatment method for fracflowbackwastewater has been formed, which includes coagulation, dissolvedairflotation, mediafilter, membrane filter, and MVR(zerodischarge). Customize equipment design parameters and specifications based on different inlet water quality and reinjection standards.
