The CO2 huff-n-puff is an effective substitute technology to further improve oil recovery of natural fractured tight reservoirs after water flooding, for its high displacement efficiency and superior injectivity. process influenced by many factors, such as miscible degree, complex fracture networks, production schemes. What worse, those influence facts affect each other making the more complex....

Core flooding experiments were conducted with the objective of evaluating near miscible surfactant alternating CO2 injection and the effect of surfactant concentrations on gas-oil and water displacements in porous media. The core samples were provided from a low permeability mixed wet oil reservoir at 156 °F and 1900 psia. In addition, very few studies of surfactant adsorption on car...

Carbon dioxide miscible flooding has become one of the important technologies for improving oil recovery. The Minimum Miscible Pressure (MMP) is key parameter to realize flooding. As MMP in research area higher than formation fracture pressure, cannot be formed. To address this problem, it necessary find a way reduce MMP. Citric acid isobutyl ester chosen carbon and crude research. effect citri...

Carbon dioxide (CO2) flooding is one of the most important and used enhanced oil recovery (EOR) method because it does not only increase efficiency but also as an underground CO2 storage. It considered a very complex involves knowing fluid phase behavior with different concentrations. should be noted that swelling (volume increase) dissolution carbon has significant effect on recovery. When thi...

The petroleum industry is developing technology to increase oil recovery in reservoirs. One of the technologies used Enhanced Oil Recovery (EOR). Selecting an EOR method for a specific reservoir condition one most challenging tasks engineer. This study tries build fuzzy logic-based screening system determine method. It created intending be able assist selecting and determining appropriate field...

several studies have shown that oil recovery significantly increased by low salinity water flooding (lswf) in sandstones. however, mechanism of oil recovery improvement is still controversial. co2 that develops buffer in presence of water is expected as a deterrent factor in lswf efficiency based on mechanism of ift reduction due to ph uprising. no bright evidence in literature supports this id...

Carbon dioxide is a typical kind of greenhouse gases, and the oil gas field recovery ratio could be significantly improved by injecting it into formation. The main goal to increase in early stage studying injection miscible flooding. With advancement “carbon neutral” strategy China, application CO 2 flooding technology, which aims enhance Chinese oilfields, has been further expanded. developmen...

Chemical reactions can impact mixing in partially miscible stratifications by affecting buoyancy-driven convection developing when one phase dissolves into the other one in the gravity field. By means of combined nonlinear simulations and experiments, we explore the power of an A + B → C type of reaction to either enhance or refrain convective dissolution with respect to the nonreactive system ...

Abstract Carbon dioxide (CO 2 ) injection is implemented into the reservoir to further improve oil production efficiency, by mixing with at condition, and becomes miscible. The miscibility affects become swelled less viscous thus easily flow through reservoir. Most of EOR projects has higher recovery factor in miscible condition. Therefore, this article aims determine effects on Cornea Field. F...