Overview
ISO 13503-2:2006 - "Petroleum and natural gas industries - Completion fluids and materials - Part 2" - defines standardized test methods for proppants used in hydraulic fracturing and gravel-packing. The standard applies to natural sand, ceramic media, resin‑coated proppants and other gravel‑packing materials and provides a consistent methodology for sampling, handling and measuring key physical properties used to evaluate proppant quality.
Key topics and technical requirements
- Standard sampling procedures: Guidance to obtain representative samples from bulk or bagged shipments; includes recommended equipment (e.g., box sampling device with a 13 mm slot opening), sample reduction and splitting to minimize segregation effects.
- Sample handling and storage: Procedures for reducing, splitting and retaining samples to preserve integrity for testing and QA/QC.
- Sieve analysis: Determination of particle size distribution, calculation of mean diameter, median diameter and standard deviation to characterize gradation.
- Sphericity and roundness: Methods to assess particle shape, including apparatus capability and alternative averaging approaches.
- Acid solubility: Procedure to measure proppant resistance to acid environments (HCl/HF as applicable) to assess chemical durability.
- Turbidity test: For泥 and fines evaluation using formazin calibration (FTU/NTU) to quantify turbidity generated by proppant in fluids.
- Density measurements: Procedures for bulk density, apparent density (ASG) and absolute density - important for transport, placement and pack permeability calculations.
- Crush-resistance test: Standard method for evaluating mechanical strength of proppant under closure stress.
- Loss on ignition (LOI): Specifics for resin-coated proppants to quantify organic coating content.
- Normative references: Incorporates ASTM E11 for sieves; draws on API RP literature (compiled/modified from API RP 56, 58 and 60).
Applications
- Ensures consistent proppant qualification for hydraulic fracturing and gravel-packing designs.
- Supports material selection, comparing sand, ceramic and resin-coated options based on mechanical and chemical properties.
- Used in drilling/completion QA, procurement specifications, supplier verification and laboratory testing protocols.
- Inputs to reservoir/completion engineering models (proppant pack conductivity, settling behavior, compatibility with fracturing fluids).
Who should use this standard
- Completion and reservoir engineers
- Proppant suppliers and manufacturers
- Third‑party testing and QA/QC laboratories
- Field service companies conducting frac and gravel-pack operations
- Procurement and standards teams defining technical specifications
Related standards
- ISO 13503 series (Parts 1, 3, 4, 5) for completion fluids and proppant performance
- ASTM E11 (sieve specifications) and relevant API recommended practices
Keywords: ISO 13503-2:2006, proppant testing, hydraulic fracturing, gravel-packing, sieve analysis, crush resistance, proppant density, sphericity, acid solubility, turbidity.