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  1. Scientfic Optimization

    Scientfic Optimization

    Using advanced engineering methods to optimize drilling operation parameters
  2. Practical Optimization

    Practical Optimization

    Extracting Best Practices and Lesson Learns in previous wells
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Scientfic Optimization

About This Project

Hydraulic Parameters Optimization

Entry of basic information for hydraulic calculations

Using curve matchnig methods using numerical algorithms to identify the drilling fluid rheology model and the equations for determining the pressure drop in each section.

More than 10 rheology models for hydraulic calculations and developing three computational methods for each type of drilling fluid model according to user requirements.

Perform all calculations for a variety of vertical, horizontal and directional wells.

Performing hydraulic calculations for different types of drilling fluids with regard to the complex corrections.

Hydraulic calculations with regard to all operational and equipment limitations, as well as with the assurance that the hole cleaning is completely done.

Perform advanced survey calculations using the latest methods with the highest accuracy and drawing two-dimensional and three-dimensional diagrams of the well

Perform hydraulic calculations for a specific depth (Static) and plot the required graphs in all cases

Perform hydraulic calculations in the case of while drilling (Dynamic) and drawing diagrams required in all cases

Bit hydraulic calculations and plotting related diagrams in all possible scenarios (Static & Dynamic)

Hydraulic parameters calculations include: Bit Pressure Loss, HHP, IF, HSI, Nozzle Velocity, plotting diagrams of each parameter and determining the optimization conditions for each parameter.

Determine the SPP required to maximize HHP or IF and plot the relevant graphs

Bit hydraulic parameters using Max HHP, Max IF and Minimum TFA methods with regard to operational limitations and according to available inventory of nozzles.

Advanced Hole Cleaning Calculations for all angles of a directional well to confirm or not approve the hydraulic parameters optimized in the previous step.

Selection of optimal hydraulic parameters using ROP prediction model in each field and the evaluation of hydraulic behavior using these parameters.

Mechanical Parameters Optimization

Determine the optimal value of WOB and RPM by performing sensitivity analysis on the ROP prediction model

Determine the optimal value of WOB and RPM by analyzing MSE, HMSE, and DSE charts

Determination of optimum mechanical parameters, using the diagrams obtained in the analysis of offset wells data and optimized hydraulic parameters

Determination of optimal mechanical parameters using practical optimization results and correction of these parameters by implementing numerical algorithms on the ROP prediction model.

Bit and BHA Selection

Determine the optimized bit run required (minimum bit run required optimally) to drill each hole

Selecting best Bit type in each bit run

Determine optimal BHA in each bit run to create conditions to achieve optimal hydraulic and mechanical parameters.

Scientific optimization

At this module, considering the general conditions of the hole, the properties of the drilling fluid, the specifications of DHM, the specifications of the mud pumps, the best combination of hydraulic-mechanical parameters and the most suitable BHA and Bit in each bit run will be offered. Also, at this stage, the proposed WOB and RPM values from the previous step are corrected if necessary.

In the hydraulic program provided by the Zagros Drilling Company, the following are considered:

Selecting the best drilling fluid rheology model
Critical flow rate at any depth.
Specifications of the DHM and other tools in the wells should be considered.
Try to maximize the bit HHP.
In depths where there is no possibility of optimizing the bit HHP, the amount of impact force will be optimized or the maximum bit pressure drop (Minimum TFA) will be reached.
Best H.S.I. It is possible to choose for any type of bit, due to hole constraints
Try to keep the Nozzle velocity in the best possible way to get the highest ROP.

The scientific optimization module aim is to optimize the hydraulic parameters by the method has been developed in the OptiTech.In addition, the best hydraulic energy is used with regard to any mechanical energy used in such a way as to avoid mechanical and hydraulic energy losses.To optimize the hydraulic parameters by entering the information from the target well (the well is being optimized); first, the Survey Calculation process is performed to obtain all the information about the coordinates of each point in the well, Then the hydraulic parameters are calculated.

In this section, we come up with a selection of fluid rheology model into the hydraulic calculation phase. In the hydraulic module, Hole Cleaning calculations should also be considered to select the best parameters in the vertical and directional wells, as well as the calculation of the hydraulic pressure drop in the hydraulic module will be done by considering corrections such as the cutter load, tool joint, pressure, temperature and … .

All hydraulic calculations in the case where the depth of the Bit is constant (Static), the depth of the Bit is constantly changing (Dynamic-While Drilling), and … will be done by considering all the operational limitations of drilling rig and the inventory of  nozzles in different parts of the software . At the end of this section, based on various methods of optimizing the hydraulic parameters, the optimal value of each parameter (TFA, Pump Rate, …) at each depth is determined by ensuring that the hole cleaning is done completely. After selecting the optimal hydraulic parameters in each section and each depth, sensitivity analysis on the Pump Rate at different depths will also be done to achieve the best hydraulic parameters.

In order to optimize the mechanical parameters, methods based on the prediction of the ROP are used with practical data. Now, optimal mechanical parameters with optimized hydraulic parameters should be selected in such a way that the cost of the meter (Cost / Meter) is minimized while maximizing the drilling ROP.

Bit Hydraulic calculations in the hydraulic module

Results of scientific optimization in different fields show that after scientific optimization on practical optimized well, the ROP at different depths was 5-25% higher than the practical optimized well.

Scientific Optimization

Using advanced engineering methods to optimize drilling operations parameters


Drilling Optimization, OptiTech