PropTester, Inc. is an independent laboratory specializing in the research and testing of products utilized in hydraulic fracturing & cement operations. Our primary focus is to apply API (American Petroleum Institute) practices, ISO (International Organization for Standardization) standards, and PropTester procedures as a basis for qualifying fluid, proppant performance and cement integrity. By coupling our industry-wide knowledge with a defined quality assurance program, we partner with companies throughout the oil and gas industry to increase well productivity and profitability.

At our base laboratory in Cypress, TX, we have a full array of equipment for proppant testing, long-term conductivity, fluids testing, and cement quality analysis and control. PropTester also has the availability to test materials at the well site through the use of our Mobile Laboratories and expert field oversight. For accurate conclusions in the lab and validation at the well-site, contact PropTester today.

Proppant Testing ISO 13503-2 / API RP-19C +

PropTester is capable of analyzing frac sand, resin-coated and ceramic proppants through ISO standards and non-standard procedures at our laboratory in Cypress, Texas. Experienced technicians are readily available to collect proppant at plants, trans-load facilities, ports and well-sites to authenticate materials. With our patented QUAD® system, we collect proppant at the trans-load facility for testing then follow it to the end user to insure that quality proppant is placed in the field storage units. Testing can also be performed in the field through the use of our Mobile Laboratories which are fully equipped for base-lab standard testing.

As field expertise is vital to the industry, our experienced professionals offer on-site field oversight for both onshore and offshore wells. Prior to proppant offloading, PropTester will inspect field storage bins for potential contamination and cleanliness issues and assure quality throughout the job. As the proppant supply chain continues to diversify, PropTester can offer peace-of-mind by analyzing proppants at any time and validating the quality at the well-site.

For more information on Proppant Testing or request a quote, click here.

ISO 13503-2 / API RP 19-C Full Service Base Testing


  • Sieve Analysis & Median Particle Diameter (MPD)
  • Turbidity Test
  • Bulk Density & Specific Gravity
  • Microscopic Examination & Photomicrograph
  • ISO Krumbein Roundness/Sphericity
  • Clusters
  • Resin Coating Efficiency
  • Unconfined Compressive Strength (UCS)
  • Percent of Resin Content/Loss on Ignition (LOI) Ph Of Water Extract & Wettability Test Acid Solubility
  • Crush Test @ Defined Stress
  • K Factor Crush Test
  • Store Proppant Sample For One Year

Hot/Wet Crush Tests are available. This robust group of tests helps determine the actual crush strength of proppant under realistic well conditions. Simulating the proppant pack in situ stress profile under hot/wet conditions found in the field, allows the client to select the optimum proppant of choice under their reservoir conditions.
Mineralogy Test are also available upon request.

Conductivity Testing +

Researches continuously study reservoir specifics. By creating highly conductive proppant packs to maximize effective permeability while reducing fines and migration, overall well productivity can be increased. Past research has shown as little as 5% fines may reduce flow capacity by at least 50% via a change in median particle diameter (MPD). However, this is just one of several damaging mechanisms (e.g. polymer residue, fines migration, embedment, cyclic loading, etc.) that can harm proppant pack flow capacity.

To better understand and address issues that can impact well production, PropTester’s laboratory evaluates hydraulic-fracturing and/or gravel-packing proppants with the industry Standard Conductivity Procedures (ISO 13503-5 / API RP-19D) as well as Well-Specific Testing Parameters. Specify your conductivity testing factors, up to 20,000-psi stress and 500°F. PropTester will then work with you to reveal and finalize the products that best meet the needs of your specific fracturing application. Any quarried sandstone, limestone or downhole core can also be shaped by an automated surface grinder to simulate formation material in these conductivity tests. PropTester is also equipped to test regained / retained propped fracture conductivity to measure the impact of fracturing fluid on the proppant pack performance.

For more information on Conductivity Testing capabilities or to request a quote, click here.

PropTester Exclusive: PS-50®

PropTester exclusively offers Single Point Conductivity testing with our patented PS-50® - Point Specific 50 Hour Long-Term Conductivity Test. This test provides answers to proppant flow capacity at your specific reservoir pressure and temperature environment. Customers select the proppant, temperature and pressure profile to answer specific engineering questions.

Click here for more information on PropTester’s PS-50 Test.

Overview of Conductivity Testing Capabilities:

- ISO 13503-5/API 19D Standard Conductivity
- Customized Long-Term Conductivity; up to 20,000 psi and 500F
- PS-50 Point Specific Testing
- Retained/Regained Conductivity and Permeability

Due to the high demand for conductivity research and testing, PropTester has expanded its lab capacity by 50% as of February 2015. This increase in equipment will allow PropTester to provide customers with accurate reports in a timely manner.

Fluids Testing +

Many properties need to be considered when selecting the right fluids for your well. PropTester provides extensive research and testing capabilities both inside the lab and at the well-site to determine which fracturing fluids are best suited for your specific field application using standard and well-specific procedures. Our expert lab technicians can work side-by-side with clients to validate current fluid systems and also work with companies to create new systems. All data is maintained centrally by PropTester for future comparison or application, as needed.

Fluid testing capabilities include the following. To directly contact our fluids laboratory or request a quote, click here.

Fracture Fluids Testing and Oversight

Pre-job fluid rheology profiles and breaker schedules can be obtained with recommended formulations using a high pressure / high temperature Rehometer. Customize your tests to suit your needs. Shear rates from 1 to 1000 sec-1, up to 500F and 2000 psi. All data is maintained centrally by PropTester®, Inc. for future comparison or application, as needed.

PropTester fluid specialists are on location (onshore or offshore) prior to the stimulation treatment to ensure quality. Tasks include identifying chemical additives, auditing chemical & base fluid inventories, evaluating chemical compatibilities, verifying cross-link times, and calibrating chemical feed pumps. The job design, a pre-frac material balance, and treatment schedule are reviewed with service company personnel and the operator representative. Chemical inventories are documented during each stage and the final mass balance is calculated. Proppant transportation & delivery records are also recorded as part of the fluid service.

Guar Testing

PropTester®, Inc. provides in-depth test results on raw and refined guars from across the globe. The demand for guar in the oil industry has risen over the past few years and several new areas have been experimenting with growing guar beans. With this in mind, the quality of the product is very important.
In-depth guar testing includes particle distribution, moisture content, hydration time, cross-link performance, insoluble acid residue, and the measurement of pH.

Polymer Injection

Ensure proper mixing and application of your polymer injection treatment at the well-site. Reservoir conformance sometimes employs a polymer injection process to block high permeability fractures and channels in both injection well and producing well applications. A synthetic polymer (e.g. polyacrylamide) which is cross-linked can provide an effective means to modify a water injection profile and/or improve oil recovery. However, a successful gel treatment is based on effective quality control (QC) practices to ensure proper mixing and performance. Polymer injection QC oversight by PropTester®, Inc. includes the following:

Pre-job review of treatment objectives, gel technology, available equipment (e.g. mixing tanks, weigh scales) & rig-up procedures

  • Pre-job analysis & compatibility testing of mixing water (e.g. brine or sea water)
  • Pre-job preparation & grading of gel samples with chemicals & water to be employed
  • Observation of treatment mixing procedures & metering during the job
  • Sampling, evaluation, grading, & comparison of in-line samples retrieved during the job
  • Physical inventories (Final – Initial)
  • Material balance calculations
  • Photographs

Regain Conductivity Fluid Testing

Fracturing fluid can reduce proppant pack conductivity by 90% as it is being placed in the formation. Maximize production by minimizing fluid damage. PropTester®, Inc. can maximize your breaker schedule and use the Chandler 5500 to make sure you still have the rheology to place the proppant.

Cementing Services +

The life of your well depends on successful cementing operations. With intricate well designs and completion practices, cement failures have become an increasing threat. PropTester aids in all aspects of cementing; from planning and designing to proper oversight procedures throughout the job on all types of casing strings. Technical cement testing is utilized through our new Cement Laboratory. Avoid the costly repairs of remedial cementing, reduce liability and allow for production and stimulation operations to be safely conducted by utilizing PropTester’s cement testing equipment and expert personnel.

Cement Testing Capabilities

  • HTHP Thickening Times
  • Ultrasonic Comprehensive Strength
  • Static Gel Strength
  • Expansion/Shrinkage
  • Conventional and Stirred Fluid Loss
  • Free Fluid
  • Density Verification
  • Particle Segregation
  • Cement Permeability
  • Dynamic Settling

Onshore and Offshore Oversight Services

  • Inventory Control
  • Water Analysis
  • Verify Cement Spacer/Density
  • Substantiate Cement and Displacement Calculations
  • Audit Blending and Sampling Procedures
  • Confirm Proper Plug Placement and Release
  • Validate Displacement Volumes
  • Confirm Centralization and Float Equipment
  • Monitor Returns

To directly contact our Cement Laboratory or request a quote, click here.

Electronic Technician Services +

PropTester is capable of providing qualified electronic personnel that will meet the needs of your business whether they are onshore, off-shore, in the field or at your facility. Our technicians are certified to perform work on all brands of Fracturing, Cementing, and Coiled Tubing Equipment.

Equipment Sales and Training +

PropTester offers consulting in API/ISO lab training for your lab personnel as well as assistance in the development of your own internal Quality Control Lab. This ranges from a list of equipment needed for procurement and on-site set-up of your lab. PropTester can also help supply you with various individual pieces of equipment and supplies that will ensure the completion of your project with the appropriate ISO/API equipment needed.

The following pieces of equipment are available for purchase.
To place orders or for questions regarding equipment sales, click here.

Built-to-Suit Laboratories +

Companies in need of lab space for research and development are welcome to rent space from PropTester’s facility. Upon availability, we are capable of housing all forms of oil field testing, including proppant ISO/API with an option for long term conductivity machine rentals, full fluids set up - including a custom Flow-Loop System and API Cementing Testing. Full-time lab technicians and a personal security system can be utilized.

For more for information regarding lab space rentals, click here.

Other Services +

Water Analysis

PropTester®, Inc. can determine the quality of your water and its scaling tendencies.
A water analysis can be partial or complete depending on requirements. When a complete water analysis is needed, then one is able to complete a Stiff plot which reflects a fingerprint of that particular water sample. The fingerprint is composed of complementary anions & cations, representing water composition.

Test parameters may include as follows:

  • Specific gravity
  • pH
  • Alkalinity (bicarbonate, carbonate, & hydroxide)
  • Chloride
  • Calcium
  • Magnesium
  • Total hardness
  • Iron, total
  • Sulfide
  • Sulfate
  • Total dissolved solids
  • Sodium
  • Resistivity
  • Bacteria Testing

Barite Testing

As with many other products, the demand for Barite in the oil industry has risen over the past few years and several new areas have been opened for mining the ore. With this in mind, the quality of the product is very important. PropTester provides in-depth test results on Barites mined across the globe.

PropTester®, Inc. provides the following tests:

  • Absolute Density (g/cm3),
  • Water Soluble Earth Metals (g/kg),
  • Particle Distribution Above 75 um,
  • Particle Distribution Below 6 um.

For additional information or questions, click here.