LAFARGE

LAFARGEOil Well CementsQuality and Consistencyfor over 50 yearsDual Certified by API:ISO-9001-2000 and API-10A

The Joppa Plant is located on the Ohio River insouthern Illinois. The plant serves the Gulf Coast,offshore and Louisiana oil field markets.Lafarge was a pioneer in thedevelopment of oil well cement withthe introduction of Trinity InfernoCement in the 1940s. Today, thecompany continues to lead the industryin the production of oil well cement,locally and internationally. Lafarge’splants and distribution centers covera wide geography where oil and gasexploration and production are present.The Exshaw Plant is located west of Calgary, Albertain the picturesque Canadian Rockies. The plant servesthe western Canadian and Alaskan oil fields.Areas served in North America includethe Texas-Louisiana Gulf Coast,Mississippi, Alabama, the Midwest,Alaska, western and eastern Canada.The Brookfield Plant islocated north of Halifax,Nova Scotia and supplieswell cements for theHibernia Basin andSable Island oil fields.

Lafarge Oil Well CementsHT-HP "thickening time" testing ispart of the Joppa Plant qualitycontrol process. Temperaturesreach as high as 600º F.ApplicationOil well cement is used in the production and exploration of oil and gas onshoreas well as deep water offshore wells to depths of up to 7000 feet (~ 2100 meters).A typical well can be thousands of meters deep, less than a meter wide, andis constructed by using a metal casing surrounded by a special cement slurrymix that fills the annulus between the outer face of the tubing and the wallformation of the hole. Lafarge North America's oil well cement provides a baseingredient in the slurry mix that is pumped into the interior metal section of thewell and forced back toward the surface from the base of the borehole fillingthe annulus. Oil well cement slurries are designed for a multitude of purposesfrom the establishment of the well's safety and structural integrity duringdrilling to the isolation of the zone of interest and the production of oil andgas upon completion.Given the complexity of the application and its extreme conditions of temperatureand pressure, oil well cement must be carefully designed to meet demandingrequirements such as predictable thickening time (set time), high sulfate resistance,high durability, fluid loss control, consistency, low viscosity, low free fluid, andstrength. Unlike surface construction, oil well completion is much less tolerant toerrors. For instance, premature thickening can have disastrous consequences dueto loss of circulation in the well, whereas too long thickening times can causefinancial losses due to excessive Wait-On-Cement (WOC) between drilling periods.Large ball mills are used to grindthe oil well clinker.LAFARGE LEADS INCEMENTITIOUS MATERIALS• CEMENT• FLY ASH (C & F)• SLAG CEMENT• SPECIALTY CEMENTSStrategicCallCentersThe Exshaw Plant cement silos ensure an adequatesupply of cement is maintained for western Canadaand Alaska.

ProductIndustryLeadershipThe Joppa Plant silos are capableof storing 90,000 tons of cementwith 35,000 tons dedicated to oilwell products.The types of cement are categorized according to the American Petroleum Institute (API) Specification10A standards, which has identified 8 classes of cement according to the depth of the well, thetemperature and pressure. Cement is also classified in grades: Ordinary (O), Moderate Sulfate Resistant(MSR), and High Sulfate Resistant (HSR). Sulfate resistance is based upon the C3A (Tricalcium Aluminate)content, which has a bearing on the durability of the cement under sulfate attacks. When oil wellcement is produced, the clinker is analyzed microscopically to ensure that the crystals and clinkermineralogy have the required characteristics. Oil well cement must also be designed and tested toperform with specific admixtures that are added to the slurry mix in order to achieve the desired thickeningtime and rheology. The three most commonly used oil well cement types are Class A, Class G and ClassH, with Class A being used in milder, less demanding well conditions, while Classes G and H are specifiedfor deeper, hotter and higher pressure well conditions. Lafarge North America produces oil well cementmeeting and exceeding API specifications, and leads the industry in quality, and consistent performance.VALUE-ADDED BENEFITSFROM LAFARGE• ISO 9001-2000 CERTIFIED• API Q1 LICENSED• OPTIMIZED LOGISTICS• 24/7 SHIPPING• TECHNICAL PRODUCT SUPPORT• GLOBAL PRESENCE• FULL PRODUCT TESTING• PRODUCT CONSISTENCY• RESEARCH LEADERPRODUCT SUPPORT TESTING• CHEMISTRY (XRF and XRD)• MICROSCOPIC EVALUATION• THICKENING TIMES- Neat evaluation- Retarder evaluation• FLUID LOSS EVALUATION• FREE FLUID• RHEOLOGY• PARTICLE SIZE EVALUATION• COMPRESSIVE STRENGTHS- API- UCA• COMPLETE API SPEC10AConvenient24/7Loading1 2ProductResearchLafarge uses the most modern tools forproduct research and support.1) Clinker quality controlled by microscopy.2) UCA testing capability.24/7 product availability at most Lafargeterminals meets customer requirementsfor delivery.

The following table summarizes the key features and benefits ofthe company's products:Cement Classes Features BenefitsClass AClass G• Ordinary grade(No C3A specification)• Used at 46% H 2O(water/cement ratio)• Comparable to ASTMType I Portland• Used at 44% H 2O• Comparable to ASTMType II or V PortlandCement• Used in shallowerapplications whenno particular highperformancecharacteristics arerequired• Thickening Timescontrollable withadditives to preventloss of circulation upto 250º F (~120º C)Technicaland SalesSupportClass H• Used at 38% H 2O• Coarser grinding• Fluid loss control• Thickening Timescontrollable withadditives to preventloss of circulation upto 450º F (~230º C)• Low Viscosity to preventloss of circulationLafarge North Americaoil well cement isavailable in westernCanada and Alaska, theAtlantic Region of easternCanada, the Midwest• Low Fluid Loss tominimize cracks andgas migrationand Gulf Coast statesof the United States.• Low Permeability forzonal isolation and lowgas migrationTrained and experiencedoil well cement sales andClass G & H(common to both G&H)• C3S concentration of48 to 65% dependenton Grade• C3A concentration of0 to 8% dependent onGrade• Excellent RetarderResponse for highereconomic benefit inmix design• Low Free Fluids forcement integrity anddurability• High Sulfate Resistancefor high durabilityunder harsh conditions• Non-Settling foruniformity in thecolumntechnical representativesare strategically locatedand committed to provideprompt, dependabletechnical service overthe entire life cycle ofthe product.Lafarge North Americaoil well cement plantsare ISO-9001 certified.• Consistent Quality forslurry design portability

Company ProfileLafarge North Americais part of the LafargeGroup. The world leaderin building materials,active on five continents,the Lafarge Group holdstop-ranking positions inall four of its divisions –cement, aggregatesand concrete, roofingand gypsum.Please contact your Lafarge representative for specificproduct information, availability and ordering.Great Lakes RegionSouthfield, MichiganPhone: 248-354-9050Northeast RegionMontréal, QuébecPhone: 514-861-1411River RegionLee’s Summit, MissouriPhone: 816-251-2100Southeast RegionAlpharetta, GeorgiaPhone: 678-746-2000Product offering varies by geographic location.Lafarge North AmericaCement Operating RegionsWestern RegionCalgary, AlbertaPhone: 403-271-9110By focusing on thedevelopment andimprovement of buildingmaterials, Lafarge putsthe customer at the coreof its strategy and offersthe construction industryand the general publicinnovative solutions thatwill bring more safety,comfort and beauty toour everyday lives.Lafarge Canada Inc.606 CathcartMontréal, Québec H3B 1L7www.lafargenorthamerica.comLimited WarrantyLafarge warrants that Lafarge oil well cementsmeet applicable API requirements. Lafarge makesno other warranty, whether of merchantability orfitness for a particular purpose with respect tothese products. Having no control over their use,Lafarge will not guarantee finished work in whichthese products are used.Oil Well Cement Plants• Exshaw, AB• Joppa, IL• Brookfield, NSOil Well Cement Terminals• Edmonton, AB• Westlake, LA• New Orleans, LAGreat LakesNortheastWesternRiverSoutheastPBOWCCE 6/04Printed on 50% recycled paper, containing 10%post-consumer waste.