Field Trial Results of a Drilling Advisory System

Chang, Dar-Lon; Payette, Gregory S.; Pais, Darren; Wang, Lei; Bailey, Jeffrey R.; Mitchell, Nicholas

doi:10.2523/iptc-17216-ms

Cited by 15 publications

(4 citation statements)

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“…If the torque limit has not been violated, λ will be equal to zero and the constrained WOB0 value will be equal to the WOB0 found by the optimizer. If the torque limit is exceeded, the WOB demanded by the ES algorithm will be reduced until the torque is again below its limiting value, at which point λ will retain a value determined by the summation term in equation (13). How fast the reduction in WOB takes place once the constraint is violated is controlled by the gain parameters KP and KI in equation (13).…”

Section: Reactive Constraint Handlingmentioning

confidence: 99%

“…If the torque limit is exceeded, the WOB demanded by the ES algorithm will be reduced until the torque is again below its limiting value, at which point λ will retain a value determined by the summation term in equation (13). How fast the reduction in WOB takes place once the constraint is violated is controlled by the gain parameters KP and KI in equation (13). They should be large enough to ensure that the penalty variable, λ, reduces the requested WOB faster than the adaptation gain, γ, is able to demand increases in the WOB.…”

Section: Reactive Constraint Handlingmentioning

confidence: 99%

“…ROP) within this dataset to generate a representative data-driven model [9] or to tune the parameters in a physics-based model. A drilling advisory system which suggests changes in input parameters to the driller for the purpose of exploring the parameter space and identifying the operational point which minimizes the MSE has been field tested with good results [13].…”

Section: Introductionmentioning

confidence: 99%

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Micro-Testing While Drilling for Rate of Penetration Optimization

Nystad¹,

Павлов²

2021

Preprint

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The Rate of Penetration (ROP) is one of the key parameters related to the efficiency of the drilling process. Within the confines of operational limits, the drilling parameters affecting the ROP should be optimized to drill more efficiently and safely, to reduce the overall cost of constructing the well. In this study, a data-driven optimization method called Extremum Seeking is employed to automatically find and maintain the optimal Weight on Bit (WOB) which maximizes the ROP. To avoid violation of constraints, the algorithm is adjusted with a combination of a predictive and a reactive approach. This method of constraint handling is demonstrated for a maximal limit imposed on the surface torque, but the method is generic and can be applied on various drilling parameters. The proposed optimization scheme has been tested on a high-fidelity drilling simulator. The simulated scenarios show the method's ability to steer the system to the optimum and to handle constraints and noisy data.

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Section: Reactive Constraint Handlingmentioning

confidence: 99%

Section: Reactive Constraint Handlingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Micro-Testing While Drilling for Rate of Penetration Optimization

Nystad¹,

Павлов²

2021

Preprint

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“…Key elements of this drilling efficiency program included vibration modeling and optimization of the bottom hole assembly (BHA) configuration [25][26][27][28] , bit redesign and depth of cut control elements [29][30][31][32] , use of larger diameter drill pipe 33 , and field trials of an active damping top-drive torque control system 34 . In addition, a real-time drilling parameter optimization system was developed to continuously monitor the Mechanical Specific Energy (MSE) while drilling 35,36 .…”

Section: Fast Drill Process Extensionsmentioning

confidence: 99%

Maximizing Capital Efficiency by Expanding the Limiter Redesign Process to Flat Time Operations

Valenta

Walker

Pastusek

et al. 2014

SPE Annual Technical Conference and Exhibition

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The operator's drilling efficiency program has been expanded to a Limiter Redesign Process that seeks to optimize all rig time, including flat time. As drilling efficiency gains have been achieved, flat time now accounts for roughly 80% of the total rig time and approximately 70% of the total cost of drilling and completions operations; leaving 20% of rig time for drilling. This fact led to the generation of a comprehensive Flat Time Reduction (FTR) program.The Fast Drill Process has become a well-known workflow to identify hole-making limiters and mitigate them through "relentless redesign to the economic limit of performance". Efforts to increase drilling efficiency continue, and this process has yielded a continuous increase in the overall footage per day and a reduction in flat time within individual hole sections.To address operations that do not include drilling of rock, the operator has launched a similar effort and workflow process which focuses on "flat time" portions of the well construction process. This has become a key focal point in the organizations approach to maximize capital efficiency. The Flat Time Reduction process provides an environment in which operations are optimized while further enhancing a workplace where "Nobody Gets Hurt."This process is yielding significant savings globally and has been accomplished through planning, "real-time" recognition and response, collaboration with service providers, and a focus on Non-Productive Time (NPT) reduction while continuously improving safety performance. Field applications of limiter redesign are discussed in this paper. The purpose of this paper is to present the current status and specific approaches being used to reduce flat time and share the workflow process.In 2004, the operator started a pilot program to determine if drilling performance could be improved by analyzing and reacting to trends in Mechanical Specific Energy (MSE) 1, 2, 3 by rig site personnel on a real time basis. MSE is a performance measurement parameter that approximates the bit's drilling efficiency and is a function of the weight-on-bit (WOB), surface torque, bit rotation per revolution (RPM) and the rate of penetration (ROP) for a given hole size. When the bit is drilling efficiently, MSE will be steady and will approximate the rock's confined compressive strength. When dysfunction occurs, MSE increases

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An Integrated Workflow to Mitigate Drilling Vibrations and Increase Daily Footage

Bailey

Pastusek

Junaibi

et al. 2016

Day 2 Tue, November 08, 2016

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A workflow that combines optimization of the drill string and bottomhole assembly (BHA) design during well planning and then applies advanced surveillance tools to a well-trained drilling crew yields reduced vibrations, higher drilling rates, and less trouble cost. This methodology is based on the premise that an efficient drilling operation requires optimized tool designs, advanced diagnostics using real-time drilling parameters, and onsite training of efficient drilling practices and the proper use of rig control systems. The use of efficient modeling procedures to compare alternative drill string and BHA designs provides valuable insights into the string and tool selection process. A method to select the optimal stabilizer contact locations for the BHA tools helps to avoid lateral vibration dysfunctions, and a torsional vibration model can quickly evaluate the resistance of alternative string designs to harmful torsional stick-slip vibrations. Provided the proper hardware, a well-trained driller can be more effective with automated drilling performance evaluation tools that provide real-time drilling parameter recommendations based on optimizing Mechanical Specific Energy (MSE), torsional vibration stick-slip severity, and Rate of Penetration (ROP). BHA lateral vibrations modeling is field-proven and has been applied globally. One case study will show an application of the model to select a BHA design with specified rotary speed sweet spot. The torsional vibration model can be used in both a design process and in a real-time surveillance mode. In one case study, stick-slip vibrations were too severe to drill ahead with a tapered string design that was selected to lower the equivalent circulating density (ECD). The model helped identify the increase in stick-slip resistance obtained by substituting a portion of the smaller pipe with larger pipe. A real-time surveillance tool provides automated drilling performance analysis and makes recommendations to the driller on bit weight and rotary speed. The recommendations are based on the torsional vibration model results, operating in a surveillance mode, and the MSE and ROP. Rig control systems impact drilling dynamics and efficiency in ways that are not well understood by most drillers, and training on awareness and mitigation of these effects can avoid severe dysfunctions.

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Field Trial Results of a Drilling Advisory System

Cited by 15 publications

References 0 publications

Micro-Testing While Drilling for Rate of Penetration Optimization

Micro-Testing While Drilling for Rate of Penetration Optimization

Maximizing Capital Efficiency by Expanding the Limiter Redesign Process to Flat Time Operations

An Integrated Workflow to Mitigate Drilling Vibrations and Increase Daily Footage

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