Coiled Tubing Simulator

«RN-VECTOR» is an industrial software for mathematical modeling and analysis of CT technological operations.

RN-VECTOR - Coiled Tubing Simulator

Application

Coiled tubing is used in oil and gas wells to perform a variety of technological operations: borehole flushing and bottomhole normalization, inflow induction and well development, milling of restrictions to restore the flow area, fishing operations, installation and drilling of cement bridges and packer plugs, acid treatments, geophysical surveys , hydro-sandblasting perforation and others.
Coiled tubing simulator is used in oil and gas industry in planning, control and analysis of the CT technology application.

Benefits

CT load and buckling calculations
CT stresses are affected by CT and wellbore hydraulics
CT critical stress calculation
Multiphase hydraulics and solids transport
History of metal fatigue wear due to cycling and critical stress are computed for each CT spool
Visual representation and editing of all the equipment input parameters and the RIH/POOH plan

The Main Process of CT Design and Analysis of the Work Performed

Well Trajectory Determination

Well Trajectory Determination

While creating a real well design the trajectory and inclinometry are imported from a file. Import from files of various formats is supported (depending on the data format, it may be necessary to specify the required data columns and/or their formats). The trajectory is displayed on a 3D graph.

Well Construction Determination

Well Construction Determination

In Construction window well construction parameters are set, they are simultaneously displayed on the well diagram. The set parameters include several (at least one) casing sections, for each section various characteristics are specified: the depth of its descent from the previous stage, external and internal diameters, open borehole diameter, volume, friction coefficients, roughness. Tubing sections are set in the same way. It is possible to enter local restrictions on the slurry way, which provide hydraulic resistance to the flow.

Setting the Parameters of CT Fleet Surface Facilities

Setting the Parameters of CT Fleet Surface Facilities

In Surface facilities window the equipment elements are selected from those stored in the database (coiled tubing, spool, gooseneck), and the geometrical parameters of the equipment location are set, as well as the hydraulic choke parameters. The parameters of all selected items from the database can be seen in this window.

RIH/POOH Determination

RIH/POOH Determination

RIH/POOH parameters can be calculated both for the moment of reaching the target depth, and for the complete work plan. For each work stage various parameters are specified: RIH depth and speed, injected fluids and their flow rates, the injection mode and maintained pressure (wellhead, bottomhole or circulation). Additional columns display information on total time and injected volumes of fluid and gas.

Calculation Options

Calculation Options

The user can specify the entire list of necessary calculations and options used in Model options window, including selection of models for calculating gas-liquid flow and solids transport.

Calculation and Display of Results

Calculation and Display of Results

All selected load and hydraulics models are calculated simultaneously for each RIH/POOH stage. The user can configure the list of graphs and displayed curves, their order and design in any convenient form or use the preset templates.

Model Adaptation Based on Actual Weight Data

Model Adaptation Based on Actual Weight Data

To compare the calculated depth dependence of weight and critical forces on the injector it is possible to combine the graphs of calculated and imported data recorded during CT operations. Friction coefficients are applied to adapt the model to actual data.

Working with the Database

Working with the Database

In RN-VECTOR it is possible to use finished coiled tubing, tubing and casing pipes, fluids, attachments, goosenecks and solids from the system database and also create new ones.

Actual Treatment Data Analysis

Actual Treatment Data Analysis

It is possible to import actual treatment data from text and binary files for display and express analysis, preprocessing and combining data from several files. RN-VECTOR allows express processing and analysis of imported data, automatic calculation of integrals for all displayed curves of volumetric and mass flow rate, increasing the informative value of imported coiled tubing data visualization, marking and giving explanations to some points.

Prepairing Reports on Actual Treatment Data

Prepairing Reports on Actual Treatment Data

The report generator exports graphs of imported, measured and calculated data at any intervals convenient for work.

Fatigue Wear Calculation

Fatigue Wear Calculation

Fatigue is calculated to take into account coiled tubing stress-strain state along the entire tubing, accounting for fatigue damage accumulation. The result is written to the database of the selected coiled tubing.

Plans

  • Unsteady fluid flow

  • Influence of temperature effects on CT

  • Reservoir inflow or fluid losses

  • CT diameter and wall thickness change due to fatigue wear

  • Calculation of the optimal wellbore flushing mode