.... HCl solution with a concentration of 0.5% was injected into the microchannel. The flow rate of the HCl solution was 1.7×10 −10 m 3 s −1 (= 5.8×10 −4 m s −1 for mean velocity). artificial intelligence upstream oil & gas concentration acidizing péclet number acid concentration complex...

... collected during coreflood were measured using a commercial pH meter (Oakton® Instruments, Vernon Hills, Illinois, USA). The core effluent samples were diluted to analyze the calcium and iron ion concentrations by inductively coupled plasma–optical emission spectroscopy. The acid concentration in live acid...

.... In calcite formations, high temperatures promote acid leakoff into the formation, resulting in inefficient fracture stimulation. On the contrary, low temperatures reduce the overall reaction kinetics and attenuate the HCl reaction with calcite. Also, simulation results show that high acid concentration...

... Upstream Oil & Gas hydraulic fracturing Modeling & Simulation acid propagation Exhibition spe annual technical conference Injection Rate natural fracture acid pvbt indicator carbonate reservoir acid concentration porosity distribution fraction machine learning complex reservoir...

... 7 2019 23 7 2018 18 12 2019 Copyright 2019, Society of Petroleum Engineers Artificial Intelligence Upstream Oil & Gas proppant fracturing materials fracturing fluid stimulation experiment conductivity acid concentration acid powder particle acid treatment...

... limited regime, the Damköhler number is the ratio of reaction rate to convection rate. Bazin ( 2001 ) investigated the effects of acid concentration, temperature, and limestone permeability on the optimal injection rate by use of different acid formulations and limestone core samples with different...

.... This interstitial velocity at the wormhole tip controls the wormhole propagation. The optimal acid-injection rates are then calculated by use of semiempirical flow correlations for different flow geometries. The optimal injection rate depends on the rock lithology, acid concentration, temperature, and rock-pore...

... the fracture conductivity (assuming a constant closure stress). Pournik et al. ( 2013 ) studied the effect of acid spending on fracture etching and conductivity. They found that the etching pattern and the amount of rock dissolved depended strongly on the acid concentration. In particular, it was shown...

... of corrosion inhibitor type, concentration, and acid concentration were investigated. Aromatic and multiple bonds substituents introduced to mono-and diamine compounds were found to enhance inhibition performance compared to the starting materials (dodecylamine and 1,12-dodacanediamine). This is attributed...

... acid stimulation samples that contain high acid concentrations, dissolved oil, suspended solids, and several different acid additives. Citric and acetic acids are also used in acid treatments as iron control agents at temperatures less than 200 and 150°F, respectively. An analytical method using...

...K. C. Taylor; H. A. Nasr-El-Din Summary Three different commercial formulations (A, B, and C) of in-situ gelled acids are compared in detail at temperatures up to 150°F and acid concentrations from 5 to 20 wt% HCl. In-situ gelled acids are said to work by a gelation mechanism that occurs...

... concentration across the fracture width at the point ( x, z ) and k g = the apparent mass-transfer coefficient, defined by Roberts and Guin 21 as 22 12 2001 4 4 2002 16 8 2002 1 12 2002 1 12 2002 fracture surface acid concentration fracture wall fractal dimension...

... pressure drilling propagation acid concentration carbonate reservoir optimal flux damkohler number wormhole upstream oil & gas acid flux experiment dolomite well control flux schechter reaction rate pore injection rate concentration coreflood acidizing fluid loss wormhole...

... versus equilibrium pH, while previous work has generally studied iron concentration in completely spent acid solutions. Hydrochloric acid concentrations of 7.5 to 28 wt %, sodium chloride concentrations of 0 and 5 wt%, and iron (III) concentrations from 1000 to 10 000 mg/kg were examined with varying...

... surface topography fracture conductivity Upstream Oil & Gas roughness acid concentration hydraulic fracturing concentration SPE Journal dolomite pressure loss fracture injection condition reservoir characterization well control fluid loss control drilling fluids and materials acid...

... used. With this model, it is possible to predict the change of the rheological properties of the polymer as a function of time for various formation temperatures, transition temperatures of the succinoglycan and acid concentrations. Hence, the model can be used to identify optimum formulations...