... Abstract Alternative acid systems for carbonate acidizing have been developed to overcome some weaknesses of conventionally used hydrochloric acid. Such systems are of particular interest for the reservoirs with high temperature because of high reactivity and corrosiveness of HCl...

... as to the composition of the materials. Traditional chemistries applied to remediate asphaltic materials were completely ineffective, as were mineral and organic based acids. The initial samples gathered were somewhat soluble in traditional asphaltene dispersants, and initial applications of those products did yield...

...Concentration Lakatos et al. (2005) studied the potential of multiple aminopolycarboxylic acids as sulfate scale dissolvers. They noted that the performance of some chelating agents decreases with an increase in concentration. This was shown to be due to several reasons. Firstly...

... Abstract The production of hydrocarbons with minimum drawdown pressure requires removal of the filter cake formed during overbalanced drilling. In such an operation, the delayed-breaker system used consists of an acid precursor that reacts slowly with water in the carrier brine and releases...

... to further exploit the resource. Different stimulation techniques, such as hydraulic fracturing and acid treatments, have been used in an attempt to unlock the resource. It was observed that, while hydraulic fracturing was to some extent effective in several fields, other reservoirs have been found...

... of the formation before the gun is fired. Gas is then injected, with or without acid, to create short fractures that extend from the perforation tunnels ( Azari et al. 1997 ). Handren et al. (1993) recommends a minimum bottomhole pressure (BHP) of 0.4 psi/ft above the fracturing gradient, or a typical...

... Abstract Conventional mud acid (a mixture of HF and HCl) is the most commonly used acid system for the stimulation of sandstone formations. However, well known disadvantages such as fast reaction rate, precipitation and matrix deconsolidation restrict the usefulness of this type of acid...

... remediation scale remediation oilfield chemistry enhanced recovery wax inhibition artificial lift system downhole intervention asphaltene remediation Well Intervention asphaltene inhibition Upstream Oil & Gas balcon 8 San Francisco acid treatment stimulation treatment wax remediation...

... enthalpy steam turbine geothermal fluid condition Kawerau plant design extraction rate Nga Awa Purua Upstream Oil & Gas deposition contract silica deposition society of petroleum engineers geothermal reservoir Brine acid silica saturation index efficient plant design Introduction...

... production [ 33 ]. The interested reader is directed to the articles of Maini [ 9 , 14 ] and Firoozabadi [ 31 ] for significantly more detailed reviews. Acid number measurement The acid number (AN) of each oil sample was determined by the potentiometric titration method [ 20 ]. About 0.5 g of oil...

... equipment completion system media Upstream Oil & Gas liner acid new system control completion system falc petroleum engineer packer hydraulic extension field testing technology development north slope lead operation improved reliability one-trip sand-control completion system...

... system, cost comparisons with existing methods, and expected economic benefits over the lifetime of wells in typical applications of this new technology. media completion installation and operations sand control upstream oil & gas acid gravel pack liner perforation damage rig time one...

... Proposal In an effort to improve oil production at Elk Hills, located in Kern County, California, successful new methods for acidizing both horizontal and vertical Monterey Shale wells were developed. During 1999 and 2000, 21 horizontal Shale wells were drilled with unacceptable production...

... Abstract Several techniques and acid systems have been used to increase the productivity of the Monterey Formation, Offshore California. Reservoir production data will be used to evaluate the effectiveness of different acidizing techniques and systems used to treat the Point Arguello field...

... completions in lower-permeability reservoirs. production rate infield well acid horizontal completion hydraulic fracturing lateral perforation horizontal section stimulation ohlc method completion installation and operations economic spe 76725 effective stimulation fracture reservoir spe...

... of the treatment, field monitoring, and analysis of acid returns. Core flow experiments were performed to screen various acid formulations, and evaluate acid additives. The designed treatment was applied on several water injectors. Acid returns were analyzed to evaluate the effectiveness of each treatment...

... treatment efficiency. Much smaller, lower concentration acid treatments can then be effectively applied to stimulate the interval. Surveys following the field application of the new system have shown not only increased flow, but also flow throughout entire length openhole intervals. The wells evaluated...

... into the formation, as well as filter-cake impairment, must be eliminated to realize the full potential of horizontal completions. A common approach to minimizing such damage is the application of acids or strong oxidative breaker systems to dissolve filter-cake solids and polymers. The typical wellbore treatment...

... Abstract Extreme near well-bore acid stimulations have successfully helped to maintain production in the Tulare Zone of the South Belridge Field. An economical alternative to redrilling wells was a driving force behind this program. Since 1991 over 600 of these treatments have been performed...

... ABSTRACT The results of a series of dual (diversion) and single core foam experiments followed by liquid injection in unfired Berea sandstone cores are reported at high rates relevant to matrix acidizing. The sensitivity of the results to surfactant type and concentration, foam and post-foam...