CEMPRO⁺ - Cementing Job Model

Brochure

• CEMPRO⁺: Cementing Job Model (English)
• CEMPRO⁺At A Glance (English)
• CEMPRO⁺: Modelo de trabajo de cementación (Española)
• CEMPRO⁺: 泥浆顶替模型 (中文)

Case Studies

• Displacement Efficiency in Cementing - Numerical and Experimental Results
• Displacement Efficiency - Validation with Cement Bond Log
• Bottomhole Circulating Temperatures - Validation

Paper

• Best Practices for Cementing Job Software
• Design and Simulation of Foamed Cement Jobs
• Common Well Cementing Problems and Solutions

Journal

• Displacement Demystified

Q1. How does the input of mesh size and calculation points in “Displacement Efficiency” tab impact the predicted mud removal results?
CEMPRO⁺ uses mesh-based numerical methods to solve flow and transports equations to predict the displacement efficiency. The mesh points and size are definition of mesh resolution. Users can specify the mesh resolution in each of depth, radial and azimuthal directions according to the accuracy requirement. Using a high-resolution mesh (increasing number of mesh points or decreasing mesh size) can increase the accuracy of the result, yet also significantly increase the calculation time.

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Q2. Can CEMPRO⁺ do plug jobs?
CEMPRO⁺ is designed for casing/liner cementing. It can be used to simulate mud displacement with drill pipe in the wellbore, track the spacer, mud and slurry fronts and to see if the volumes are good for your job. However, when doing plug job, you’ll want to calculate for the final condition after you remove the drilling pipe – this process is not accounted in CEMPRO⁺. You can hand calculate the pipe volumetric displacement to estimate the fluid fronts, but not the slurry contamination after the drill pipe is removed.

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Q3. How does CEMPRO⁺ calculate foam rheology and its frictional pressure loss? (Lucas, Altcem)
To calculate the rheological property of foam, first calculate the N2 fraction(f) in the foam. Pressure and temperature are involved to calculate the N2 fraction, its time, and depth dependent due to gas compressibility. One dimensional spacial mesh along the wellbore is introduced in CEMPRO⁺ to calculate the gas fraction and other foam properties from point to point.

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Q4. What does Friction Factor Adjustment in “Others” tab below “Fluid” tab mean? What calculation will it affect?
Friction Factor (FF) Adjustment means the friction factor change because of the fluid change in the annulus. We input FF in the “Open Hole” tab for each casing, assuming drilling mud is between casing and wellbore. When we pump various fluids into the wellbore, and as they enter into the annulus, they may affect the FF. Friction Factor (FF) Adjustment input allows the user to reflect the change. These values are used to calculate torque and drag for liner cementing job. Unless you have some real data, it is difficult to know the exact FF Change %, but generally speaking, cement slurry may cause the increase of FF.

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Q5. How are "fluid compressibility" and "P/T dependent density and rheology" in CEMPRO⁺ related to each other?
Fluid compressibility is a tool for estimating pressure caused volume change, the results are not included in the report. The pressure is the final hydrostatic pressure only at the end of a job. P/T dependent density/rheology is a different and a more advanced functionality.
Once checked on, it’s considered in the whole simulation. Because the temperature is depth and time dependent, fluid volumes, fronts, ECDs and others are all affected and different from the case if you ignore P/T dependency. The difference will also be reflected in the report.
To check the difference, you can use a case with P/T checked on (e.g., sample case 15, 16) and run the same case with P/T checked off and compare the two.

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  PVI is launching a free cementing visualization app soon called CEMPRO ^Lite, a condensed version of the software that helps users quickly and accurately perform slurry volume calculations facilitating the viewing of wellbore schematics with fluids. CEMPRO ^Lite helps create realistic casing/working strings in one session using a variety of different string combinations. With CEMPRO ^Lite users are also able to view wellbore schematics with fluids by specifying the fluid location or the pumping volume.

  This sophisticated, yet simple to use free app not only saves time and money, but also helps users better understand cementing jobs than ever before! The CEMPRO ^Lite app can handle up to 10 pipe sections and a maximum of 10 circulating fluids.

Please click here or scan the following QR code to download CEMPRO^Lite for free!