... the flow through the less permeable part in the horizontal sections. The proposed fluid is HEDTA (hydroxyl ethylene diamine tri acetic acid). Sandstone cores were used in the coreflooding experiments, and the stimulation fluid viscosity will be measured before and after the flooding. Parallel coreflooding...

... and will help the drilling and completion engineers to better design the chemical treatments to remove the filter cake for HPHT wells. drilling fluids and materials concentration removal efficiency drilling fluid selection and formulation Upstream Oil & Gas Hedta drilling fluid property HCl...

.... The concentrations of Si, Ca, Al, Mg, and Fe in the core effluent samples were analyzed using Inductively Coupled Plasma (ICP). 0.6M GLDA (pH= 3.8), 0.6M HEDTA (pH =3.8), and 9 wt% formic acid solution were evaluated to remove the carbonate minerals from Bandera sandstone cores. Coreflood experiments showed...

... with available chelates like EDTA (ethylenediaminetetraaceticacid) and HEDTA (hydroxyethylenediaminetriaceticacid). Berea (5 wt% clays) and Bandera (11 wt% clays) sandstone cores were used in the coreflood experiments. The concentration of the chelates used was 0.6M at pH values of 11 and 4. The coreflood...

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... acid (HEDTA) and hydroxyethyliminodiacetic acid (HEIDA) produced wormholes in limestone cores when tested at 150 °F. However the efficiency and capacities differ. Because these chemicals have high solubility in the acidic pH range, it was possible to test acidic (< pH 3.5) formulations...