.... Hence, extensive laboratory analysis were conducted on the reservoir core samples to investigate the effect of 15% HCl and mud acid without any additives. The main objective was to determine the return permeability post acid treatment and subsequently evaluate potential solid precipitations...

... Abstract Successful carbonate matrix acidizing treatments require addressing pay rock mineralogy, produced fluid flow profile, selection of the best stimulation fluids, and correct placement of these fluids. A unique method of acid and diverter fluid efficiency calibration using field...

... acidizing production control downhole intervention complex reservoir upstream oil & gas modeling result stimulation acid diverter psda 4 efficiency acid treatment main acid shca 5 acid treatment downhole injection schedule main acid spra 4 carbonate reservoir optimized acid treatment...

... testing drillstem/well testing single-trip multizone gravel pack system proppant production control screenout well performance gravel pack completion completion installation and operations drilling operation inflow performance acid treatment hybrid pack treatment Introduction Field...

... Abstract The requirement for appropriate placement in matrix acidizing to achieve efficient, effective stimulation or removal of formation damage has long been recognized. Despite this, assessing the effectiveness of an acid treatment in terms of placement and treatment efficiency prior...

... Either 10% hydrochloric acid (HCl) or 10% acetic acid was used as an acid preflush prior to commencing the main acid treatment to allow the OCA treatment to be fully effective through the entire critical matrix. This acid preflush would eliminate and remove all potential calcareous and scale particles...

... success rates. This situation warrant for the need for a modified acid recipe to avoid aggravation of fines migration problems in this field post acid treatment. This paper presents the pilot application of a modified HF acid recipe incorporating chelate. The paper also depict the evaluation process...

... enhancement Exhibition database artificial lift system Upstream Oil & Gas stimulation treatment operation downhole intervention stimulation Barrow Island mineral Australia execution reservoir spe annual technical conference BWI acid treatment production well application Well Stimulation...

... Abstract Matrix acidizing treatments are widely used for stimulating oil producing wells in the Zamrud field because of damage caused by scale plugging. The success of this matrix acidizing treatment depends on the uniform distribution of the treating fluid over the entire hydrocarbon-producing...

... intervention spe 165767 acid treatment selective acid stimulation society of petroleum engineers temperature profile Introduction Drilling carbonate oil wells may encounter fluid losses, and as a result specific mud systems havebeen designed with loss control materials to stop losses and to reduce...

... paths have been choked off. The well operators often perform acid treatments on proppant packs or frac-packs to help rejuvenate the well production after verification that the production decline was caused by fines plugging or scale deposit. The well production is often restored, but this is usually...

... the viscosity of system, and prevent the fluid from leaking off into wormholes and cracks which have been etched. The micelle structure of surfactant can be used as a diverting agent in the process of acid treatment, and can also be used to control the fluid leaking off in acid fracturing stimulation...

... large flow channels (wormholes), due to the dissolution power of the acid. In most of the wells the perforated intervals are non-homogeneous, containing sections of varying permeability. In these environments, acid treatments tend to predominantly enter the highest permeability zone, which is the less...

... water disposal wells worldwide. No operational problems were encountered. Injectivity tests conducted after the acid treatment indicated that the treatment removed the damage; iron sulfide, calcium carbonate particles and trapped oil droplets. The skin factor decreased from + 22 before the treatment...

... into the formation resulted in no increase in dumping injection rates. Poor post stimulation results are confirmed by spinner survey logs done before and after the conventional acid treatments. Through Tubing Inflatable Anchoring Packer (TTIAP), a new zonal isolation tool conveyed by coiled tubing was successfully...

... engineering viewpoint, the success of an acid treatment is measured by the magnitude of production rate improvement. Another important factor is the stimulation cost for the amount of production gain. Viewed as such, candidate selection for stimulation plays an important role in the success of a stimulation...

... coils, specifically, a loss in wall thickness and surface corrosion features and how this compare to laboratory test data is discussed. production chemistry acid treatment acid corrosion protection inhibitor well integrity string 12940 flowline corrosion photograph wall thickness string...

... acid treatments are recommended and pumped in any location, worldwide. The paper reviews the results of over 100 acid jobs designed using this methodology. reservoir characterization acidizing acid system application acid treatment spe 77808 terpene hcl hv hv hf indonesia sandstone...

... were then chosen to form composite cores according to their porosity. Three to five core plugs were used to form one composite core and the composite cores were approximately 8 to 16cm long. The composite core was then placed into the core holder for acidizing treatment. A preflush solution of 10...

... upstream oil & gas design example acid-sensitive formation case history fracturing materials hydraulic fracturing proppant concentration matrix acid treatment fracturing fluid permeability operation production forecast application fracture acid treatment proppant wellbore spe 19490...