... concentration sensitivity chlorite Fluid Dynamics carbonate content acid concentration reaction acidizing concentration stimulation Bandera sandstone core flow in porous media HCl optimum hf concentration experiment mineral HF concentration feldspar dissolution McLeod clay content grey...

... the real reaction kinetics between carbonate rock and injected HCl during the acid treatment. In this paper, we investigate the effects of D e of HCl acid as it reacts with both calcite and dolomite. A modified RDA is used to obtain the true spent acid reaction kinetics at reservoir conditions...

... importance to remediate any damage that might occur during its use in the drilling operation. Extensive lab work was conducted to: 1) assess the reaction of 10 wt% HCl with ilmenite particles at 300°F and 300 psi using an aging cell, 2) optimize the concentration of HCl to remove the filter cake using...

... histories are presented to better illustrate the different scenarios where the SD-VES was applied. acidizing perforated interval viscosity Upstream Oil & Gas self-diverting acid History complex reservoir HCl stimulation viscoelastic surfactant coiled tubing production contribution...

... one fourth pore volumes was injected. At high concentration of HCl, Calcium and the surfactant propagated with the same velocity. When low concentration of HCl was employed, Calcium propagated faster. Surfactant retention is higher when the acid concentration and the injection rate were lower...

... is uncertain. Drillstem Testing carbonate reservoir complex reservoir drillstem/well testing acidizing Fluid Dynamics criterion Fogler flow rate optimum flow rate variation reaction flow in porous media Upstream Oil & Gas HCl experiment penetration maximum flow rate permeability...

..., traditional HCl:HF matrix treatments in sandstone formations are always preceded by a preflush, usually consisting of HCl to dissolve these carbonates. This approach is not always successful and adds to the complexity of the operation. The situation is worse in multistage treatments, which traditionally...

... of the observations made and present lessons learnt from such treatments. Completion Installation and Operations flow in porous media drilling operation Fluid Dynamics stimulation sequence perforated interval DEA carbonate HCl perforation acid emulsified acid ERD well evolution reservoir thief...

... Abstract Self-diverting acids are commonly used in matrix acidizing treatments of carbonate formations, not only to increase permeability by generating wormholes, as with conventional acids such as HCl, but also to self-divert into zones of lower injectivity, in the goal of optimizing zonal...

.... acidizing reservoir drag reduction upstream oil & gas coiled tubing diversion directional drilling drilling operation concentration apparent viscosity stimulation completion installation and operations acid system corrosion inhibitor viscosity application water blockage hcl acid...

... drilling fluid formulation acid drilling fluid chemistry acid treatment drilling fluid selection and formulation matrix drilling fluid property hcl inhibitor surfactant fluid dynamics spe 94790 modern hf system preflush porosity feldspar mineral flow in porous media chlorite drilling...

... Abstract This paper discusses the use of organic acid as a stimulation fluid in carbonate formations. Organic acids such as acetic or formic acid have been used for many years as alternatives to HCl, due to the retarded reaction rate, low corrosivity and reduced tendency to form acid-oil sludge...

... drilling fluid property production enhancement drilling fluids and materials reservoir characterization formation damage drilling fluid selection and formulation acid nasr-el-din hcl brine formation damage control drilling fluid chemistry mineral Introduction Formation damage can occur...

... fluid selection and formulation drilling fluid chemistry filtercake cleanup treatment permeability concentration drilling operation lddif drilling fluid property drill solid ds concentration hac completion hcl upstream oil & gas reservoir formation drilling fluids and materials...

... and stimulation was confirmed in more than 70 field applications, both through increased well production and/or injection and production logs. permeability hcl acid wormhole stimulation upstream oil & gas concentration viscoelastic surfactant fluid dynamics viscosity development diversion...

... damage acid in-situ gas production acid treatment wellbore damage gas-oil ratio drilling operation production enhancement production monitoring production control enzyme generated acid petroleum engineer reservoir characterization producing horizontal well society generated acid hcl...

... Abstract Conventionally, matrix acidising treatments have not been performed in HPHT wells with temperatures much above 150°C, because of the limitations on acid retardation technologies of hydrochloric acid (HCl) and the inhibition of corrosion of these fluids at elevated temperatures...

... remediation flow assurance oil phase fraction sludge hcl spe 54727 upper layer oilfield chemistry aggregation hydrate inhibition remediation of hydrates asphaltene aggregation drilling fluids and materials Introduction In some oil fields that experience serious difficulties with sludge...

... the contrary, mixtures of fluosilicic acid with a proper amount of hydrochloric acid (HCl) or an organic acid such as acetic acid (HAc) have been able to improve the performance of two Brazilian water injection wells by removing clay damage. These two wells, that were injecting 11 and 15 m 3 /d, are sustaining...