a: Oil-wet (no WETSOL 1)
b: Water-wet (WETSOL 1)

ICTC’s Stimulation Group is trained in impairment analysis, product selection and application of stimulation systems. Backed by an extensive technical support team, ICTC representatives can quickly and accurately diagnose the problem and recommend a successful stimulation program.

Factors that Cause Inorganic Scaling to Form:

• Concentration of mineral ions
• Temperature change
• pH shift
• Pressure differential
• Degree of agitation
• Co-mingling of incompatible waters

Formation Damage Mechanisms

• Clays and fines deposition or migration
• Scales formation
• Emulsion blockage
• Fluids/water blocks
• Biofilm development

The most common types of inorganic scale deposits in order of decreasing occurance in the Western Canada Sedimentary Basin are:

• Calcite (CaCO3)
• Iron Carbonate (FeCO3)
• Iron Sulphide (Fe5)
• Halite (NaCl)
• Gypsum (CaSO4)
• Barite (BaSO4)
• Celestite (SrSO4)

 Increase Productivity with ICTC’s Wetsol in your Stimulation Fluid

Wetsol is a multifunctional miscible solvent, composed of oil-soluble and water-soluble alcohols. It cuts through oily films and other organic material, allowing acid to attack and dissolve deposits. Wetsol does not adsorb on to the formation, so the stimulation system can advance beyond the immediate wellbore area. Acid can be pumped into restricted pore spaces because Wetsol dramatically reduces surface and interfacial tensions.

The Result

• More efficient acid spending within the matrix
• Better conductivity
• Better flow rates
• Cleaner formation

As a preflush or spearhead – the incorporation of Wetsol in front of (or in conjunction with) an acid treatment will result in clearing oil away from the advancing acid. This leaves the formation water-wet for the greatest acid contact, which in turn aids in releasing fines, and minimizes the possibility of emulsification from the mixing of acid and oil.

Wetsol spearheads also water-wet organic deposits that block acid flow into potential producing zones while breaking emulsions that may form from naturally occurring emulsifiers and/or solids.

ICTC’s Wetsol product line (Mutual Solvents) has the ability to:

• Water-wet acid-solubles
• Remove biofilm
• Strip oil coatings
• Remove water blocks
• Lower surface and interfacial tensions
• Prevent emulsions
• Break emulsions
• Maintain miscibility with other stimulation fluids
• Be compatible with a variety of crudes/production fluids
• Avoid adsorption onto the formation face
• Remove oil and water based drilling fluids

Specialty Acid Packages

BR 15 and BR 28 are water-soluble scale removers that can be used as a single product for the treatment of typical oilfield related inorganic scales. These products contain a blend of mutual solvent with a complete mineral acid package. They are capable of quickly dissolving scale build-up, substantially reducing the
risk of corrosion experienced when uninhibited hydrochloric acid is used.
Also available is SR 3954 mineral acid with corrosion inhibitor, but no iron control, antisludge, or demulsifier. Specialty scale dissolvers SR 3895 and SR 3809 are used for dissolving barium sulphate and calcium sulphate.

Stimulation Objectives

• Increased production for the producer
• Increased profit for the producer
• Maintain an excellent success ratio
• Continue to be an industry leader
• Continue to earn industry reputation

Investigation/Approach

• What is the damage?
• How was it caused?
• Where is it located?
• How much damage is there?
• How is it affecting productivity or injectivity?

How to Select Candidates

• Sudden decline in production not consistent with reservoir depletion
• Injection decline
• Organic or inorganic deposition
• Chemical treatment history
• Acidizing history
• Questionable past solvent selection/application
• Production chemical (corrosion inhibitors, biocides, scale inhibitors) incompatibility
• Frequent hot oiling
• Fluctuation of fluid levels
• Plant upsets
• Review of well files
• Communication with those that are most intimate with the wells and their history

ICTC Approach

• Identify the problem
• Select the right solution
• Apply the solution correctly
• Assess and evaluate results