Water Management for Mines. Solutions and Technology

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1 Water Management for Mines Solutions and Technology

2 Water Management for Mines Too Much Water? Too Little Water? Innovative technologies that minimize uncertainty INTEGRATED SOLUTIONS FOR MINES Water supply Dewatering Slope depressurization Acid mine drainage Pumping solutions Subsurface characterization Integrated water planning Data management Contaminant fate and migration Waste and tailing management We will work with you to develop engineered solutions to manage water, helping you to focus on what you do best mining and processing ore. AN INTEGRAL PART OF MINE OPERATIONS No water, no mining. Water separates ore from rock, transports waste material, cools drilling equipment, and suppresses dust. Whether operating an open pit or underground mine, excessive or scarce water supplies can adversely affect the mining process or the environment. Meeting targets requires mitigating these impacts and implementing comprehensive water management practices. A MULTIDISCIPLINARY TEAM Our team of earth science professionals are experts at applying advanced technologies for your unique requirements. Each technology is industry-tested to meet the rigorous demands of any mine operation. Our multidisciplinary team can assist you to: Collect, compile, and analyze hydrogeologic data to characterize your mine site Quantify your water resources to develop your water supply Develop groundwater and surface water models to assess management options Optimize dewatering systems Design long-term monitoring networks to mantain compliance Conduct geochemical characterizations to address water quality issues Install instrumentation for environmental control for on-line access, when you need it Estimate the impacts from mine operations Prepare environmental impact statements Prepare mine closure plans SCHLUMBERGER WATER SERVICES Schlumberger Water Services (SWS) is at the forefront of integrated water management for mines. Our services provide both the knowledge and experience in subsurface characterization, hydrogeologic modeling, groundwater monitoring and information management necessary to identify water sources and estimate the quantity of both surface water and groundwater. Schlumberger s products and technologies are optimally designed to help you improve efficiencies throughout the life-of-mine. Through years of experience, our experts at SWS have managed the most complex water management issues in mining.

3 Our Technical Services Schlumberger Water Services integrated water solutions sup WATER RESOURCE MANAGEMENT Water affects virtually all stages of the life-of-mine. The most efficient and cost-effective mine operation works from a comprehensive water management plan that accounts for all possible water uses and includes mitigation measures to proactively limit risks. Our company develops fully integrated water solutions that address every aspect of your water management needs, from scoping level to post-closure including: Scoping and feasibility study support Aquifer characterization and advanced geophysical methods Monitoring network design and data acquisition systems Customizable data acquisition, analysis and management systems Planning and installation of pumping and monitoring systems GIS, mapping, and 3D visualization Risk analysis Unsaturated/saturated flow and transport modeling Evaluation of surface water and groundwater interactions Design of underground recharge and storage systems Long-term monitoring and compliance reporting WATER SUPPLY Mining projects require a comprehensive assessment of available water resources to meet the short and long-term project demand. Our team of professionals is experienced at assessing and developing a complete water supply plan and deploying the optimal technologies for the project. Site characterization and assessment Water balance assessments Cyanide certification support Geographic and resource mapping Satellite imagery and GIS Surface water assessment Comprehensive data acquisition Geophysical and hydrogeological characterization Water quality characterization and mapping Drilling supervision Aquifer testing and interpretation of pumping tests Water budget development Well field development and installation of monitoring systems REDA submersible or horizontal pumps for depressurization of pit slopes Diver* groundwater dataloggers offer long-term monitoring of water levels, temperature, and conductivity AquaChem* for aqueous geochemical analysis of water quality during life-of-mine Hydro GeoAnalyst*, Petrel* for developing geologic and hydrogeologic conceptual models REDA submersible or horizontal pumps offer maximum pumping for dewatering or water supply Advanced geophysical logging, seismic and optical EMI representation: High-resolution 3D/4D subsurface characterization of complex aquifers, aquitards, and discrete fractures FMI* (Fullbore Formation MicroImager), High-resolution, optical-electrical representation of sedimentary bodies and fracture identification AquiferTest* for estimating the hydraulic properties of aquifers and aquitards ECLIPSE*, Visual MODFLOW*, transport simulator estimates flow and mass transport Westbay System* for reliable, discrete, long-term sampling of water quality parameters

4 port all stages of your mining operations DEWATERING AND DEPRESSURIZATON Most mines encounter groundwater sooner or later. The extent to which operations are impacted by groundwater can vary considerably. In most situations, a properly planned and managed program of water control will provide added value to a mine project and contribute to safe operating conditions. Our team works directly with the mine geologist to develop dewatering systems that evolve with the life-of-mine. Each system is designed to remove the appropriate amount of water by accurately characterizing the groundwater flow regime and producing site-specific water budgets. Hydrogeological characterization Assessing hydraulic properties of the aquifer Well field planning and design Monitoring well installation and deployment of instrumentation Data acquisition, analysis, and management Predictive modeling to optimize mine dewatering systems Dewatering system design and operation Waste water impoundment and re-use planning Mine tailings seepage interception and control Long-term monitoring and compliance reporting Cost estimations MINE LIFE CYCLE AND CLOSURE By integrating mining for closure concepts into operational site planning and closure, our team of highly skilled mining professionals have experience in all climatic conditions, hydrogeological and hydrological regimes, and in all mine processes and ore body types. Through our experience and expertise in groundwater, surface water, geochemistry, civil engineering and life-cycle planning, we provide appropriate and cost-effective solutions to the mining industry. Water balance, water control structure design, and management Erosion and sediment control Leach and waste facility draindown prediction and management Cover design Pit lake chemistry prediction and management Materials geochemical characterization and ARD prediction and management Design of passive treatment systems Mine tailings discharge control Long-term monitoring and compliance reporting Mine planning and sequencing optimization Underground mine filling and groundwater rebound assessment Our technology and team of experts provide the most cost-effective solutions for managing your water challenges

5 Our Products and Technologies Site Characterization Schlumberger Water Services offers a full suite of sophisticated geophysical well logging technologies, data acquisition instrumentation, and geologic modeling software designed to characterize subsurface environments. Magnetic resonance identifies pore size distribution, hydraulic conductivity, and capillary pressure Epithermal neutron porosity estimates water-filled porosity Bulk density and photoelectric effect defines total porosity and lithology Well flow logging provides continuous measurements of upwards/downward flow velocity/rate Spectral natural gamma ray logs bulk matrix geochemistry and mineralogy Borehole electrical imaging highlights fracture orientation and aperture Geologic modeling provides a comprehensive view of the subsurface environment Site Characterization Technology CMR* (Combinable Magnetic Resonance) CNL* (Compensated Neutron Log) FMI (Fullbore Formation MicroImager) MRX* (Magnetic Resonance Expert) MSCT* (Mechanical Sidewall Coring Tool) Petrel RST* (Reservoir Saturation Tool) UBI* (Ultrasonic Borehole Imagery) WFL* (Water Flow Log) Field Monitoring Fully integrated monitoring packages combine high-quality field instrumentation with sophisticated data transfer and data management technologies. Our field technicians are qualified to characterize, assess, and deploy optimal groundwater monitoring technologies for your site. Multilevel well systems monitor any number of zones in a single borehole Measure pressure under shut-in conditions Sample fluids without repeated purging Conduct a variety of hydraulic tests Frequent long-term measuring of conductivity, temperature, and depth Robust compact design to accommodate small diameter wells Ceramic housing offers corrosion-resistance in most environments Real-time, wireless data transfer to centralized information management systems Field Monitoring Technology Baro-Diver* Cera-Diver* CTD-Diver* 1 Hydro GeoAnalyst HydroManager* Micro-Diver* Mini-Diver* Westbay System Analysis and Management Field data, analytical data, and spatial data are all critical components of a successful groundwater management strategy. We can help you to integrate, analyze, and report on these many data types. QA/QC functionality ensures data is accurate and within acceptable ranges GIS capabilities provide the spatial and temporal distribution of virtually any field parameter Cross-section interpretations of geologic and hydrogeologic data validates conceptual models Advanced borehole logs highlight geologic features critical to subsurface characterization Reports present project data to meet compliance guidelines and client needs Data Analysis Technology AquaChem AquiferTest Hydro GeoAnalyst HydroManager Visual HELP* Advanced Modeling Advanced modeling programs address geologically complex site conditions that extend beyond traditional flow and transport modeling. Our programs provide the highest degree of accuracy possible. Hydrogeologic conceptual models are developed directly within the data management system to support input for various numeric models Model input incorporates multi-phase flow, density-dependent flow, air flow, discrete fractures, surface water, and groundwater interactions Aqueous geochemical analysis and modeling predict changes to water quality Model results are optimized and calibrated to site conditions Finite element, finite difference, and finite volume gridding capabilities provide the numerical power to address any modeling project Three dimensional visualization tools reveal spatial and temporal trends Simulation Technology AquaChem (PHREEQC) ECLIPSE Petrel Visual MODFLOW Premium* UnSat Suite Plus* Merging advanced technologies with innovative solutions

6 July 2008 SWS v2 Schlumberger *Mark of Schlumberger.