Development of Fracturing and Oil Displacement Integrated Working Fluid
摘要
The technology of fracking has become ubiquitous in the exploitation of unconventional oil and gas reserves. It improves the permeability of reservoirs by significantly enhancing the fracture network within them. Consequently, it effectively exploits previously untapped resources. However, there are still some problems with traditional fracking techniques, such as high cost, low production capacity, and high environmental impact. Therefore, the integration of fracturing and oil repulsion has become one of the hotspots of current research. In this study, the effects of different dosages on the performance of clean fracturing fluids were investigated using an indoor one-way method with three substances, cetyltrimethylammonium chloride (CTAMC), salicylic acid (SA) and potassium chloride (KCl). The results showed that when the dosage of cetyltrimethylammonium chloride (CTMAC) reached 1.2%, the apparent viscosity of the fluid showed a stable trend. The apparent viscosity of the fluid reached the maximum value when the contents of salicylic acid and potassium chloride were 0.3% and 0.2%, respectively. The fluid is injected into the rock cracks to ensure that the fluid can effectively extend the cracks and maintain the stability of the cracks. Salt tolerance experiments showed that the gel system did not perform well in formations containing Ca2+. salt tolerance optimization showed that HT could increase the apparent viscosity of the gel and improve salt tolerance. The research in this thesis provides valuable insights and references for the continued development of integrated fracturing and oil drive technology.