The PIPESIM steady-state multiphase flow simulator is Schlumberger’s flagship well and network modeling software for steady-state multiphase flow simulation. Together with the OLGA* dynamic multiphase flow simulator, Schlumberger provides a complete software solution for design and optimization of production systems. PIPSESIM 2021.1 released.

Enhancements in PIPESIM 2021.1

•             Vogel water cut correction (composite IPR)

•             Gas lift multi-pointing in Nodal analysis and Data comparison tasks

•             VPC in Data comparison task

•             Heat transfer calculation for vertical wells

•             New corrosion model from Trusted Pipeline Advisor (TPA)

•             New PIPESIM Python Toolkit environment

•             Upgrade to Multiflash 7.1

•             Updated licensing

Vogel water cut correction (composite IPR)

To include the effects of gas break-out, the Productivity index, Pseudo steady state, and Transient IPRs for liquid inflow in PIPESIM can be modified to use variants of the Vogel's equation below the bubble point. PIPESIM 2021.1 introduces the Vogel water cut correction, which reduces the effect of gas fraction on the IPR as the water fraction increases. The Vogel water cut correction is based on a composite IPR model that combines the Vogel's equation with a linear water productivity considering oil and water fractions.

On the Completions tab in the well editor, when you have selected Use Vogel below bubble point, you will be able to select Vogel water cut correction which activates use of the composite IPR.

Gas lift multi-pointing in Nodal analysis and Data comparison tasks

In PIPESIM 2021.1, the option to determine if lift gas is injected through several valves (multi- pointing) is available also for the Nodal analysis and Data comparison tasks. For the Nodal analysis task, the option is only available for the Fixed injection pressure diagnostic type.

The option takes into consideration the surface injection pressure and temperature, injection rate, frictional pressure gradient in the annulus, and possible throttling of the gas lift valves.

You can use the functionality by selecting Enable multi-pointing under Injection parameters for an injection valve system on the Artificial lift tab in the well editor.

VPC in Data comparison task

Use of the VPC database for an injection valve system is available also for the Data comparison task in PIPESIM 2021.1. You enable the option by selecting Use VPC for gas lift on the Advanced tab in Simulation settings.

Heat transfer calculation for vertical wells

Heat transfer between a well and its surroundings varies with time. The well exchanges energy with the formation, that is, heating it up or cooling it down, until the formation is at the same temperature as the well. The Ramey (1962) model determines the ground heat transfer coefficient (hg), which is used to predict fluid temperature changes along the wellbore, as function of the time the well has been operating.

To use the Ramey model in PIPESIM 2021.1, on the Heat transfer tab in the well editor, select Calculate for Heat transfer coefficient and then enter the production or injection time.

New corrosion model from Trusted Pipeline Advisor (TPA)

PIPESIM 2021.1 includes the TPA corrosion model, developed by Trusted Pipeline Advisor.

The TPA corrosion model predicts the baseline corrosion rate on a revision of the original de Waard model (1991), which is different from the de Waard (1995) model available in PIPESIM. The model considers the pipeline operational running time as well as presence of oxygen, bacteria, corrosion damage, and evidence of black powder or debris. It works best by use of three-phase mechanistic models such as OLGA-S, TUFFP, or LEDA, because of their capability to define the transport properties of the water phase separate from the oil and gas phases. The TPA corrosion model is practically used for surface pipelines with pipe inclinations less than 60 degrees.

You can use the TPA corrosion model by selecting TPA for Corrosion model and entering a value for Pipe deployment year on the Corrosion tab in Simulation settings. By default, the model accounts for the presence of oxygen or bacteria, pre-existing corrosion damage, and evidence of black powder or debris, and uses the current year in the calculation of corrosion cumulative loss, but you can change these settings.

New profile output variables

Corrosion pit rate: Rate of pipeline material loss due to corrosion, accounting for the severity of regional stagnant water accumulations that contribute to isolated pitting corrosion damage along the pipeline. Corrosion cumulative loss: Accumulated loss of pipe material due to corrosion during pipe running time.

New PIPESIM Python Toolkit environment

PIPESIM Python Toolkit (PTK) 2021.1 comes with a new distribution package from Anaconda.

The installation of Python Toolkit does not include a code editor. We recommend downloading and installing VS Code, which is a popular open-source code editor by Microsoft with a rich ecosystem of extensions. The PTK installer includes VSCodium, which is a freely-licensed binary distribution of VS Code, that can be used as an alternative.

PTK 2021.1 supports these additional PIPESIM functionalities:

•             Nodal analysis sensitivity

•             VFP tables

•             Rate constraints in the Network simulation task

•             Get IPR curve points

•             Use MFL and PVT files

Upgrade to Multiflash 7.1

PIPESIM 2021.1 comes with Multiflash 7.1 installed by default. The new version incorporates all the changes included in versions 6.2 and 7.0. Please refer to the Multiflash UI for more details.

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