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Gabaldon, O. R. (Blade Energy Partners) | Brand, P. R. (Blade Energy Partners) | Culen, M. S. (Blade Energy Partners) | Haq, I. U. (Blade Energy Partners) | Gonzalez-Luis, R. A. (Blade Energy Partners) | Silva, T. Pinheiro Da (Blade Energy Partners) | Puerto, G. (Blade Energy Partners) | Bacon, W. (Blade Energy Partners)
The Influx Management Envelope (IME) proposed by Culen et al. (2016) is an advanced, innovative way to assess influx conditions in Managed Pressure Drilling operations, offering an improved tool for the decision making process. This work presents the process of developing the IME concept on a real deepwater MPD operation for the first time. Limiting factors such as: shoe integrity, maximum surface pressures, and mud gas separator (MGS) flow rates (gas and liquid) have been taken into consideration in the process of developing a set of Influx Management Envelopes for three different hole sections. Two methods were used for developing the IMEs: Single bubble approach, as described by Culen et al.; and hydraulic modeling using a commercial transient, multiphase flow simulation software package. A comparison of the results from the single bubble calculation versus simulation methods is presented, highlighting the impact of gas dissolution and dispersion on the manageable influx volumes in MPD. Additionally, the IME design process includes provision for advanced alternatives for safe handling and removal of influxes within the limits of the primary barriers and those of the surface equipment.
Gonzalez Luis, Romar Alexandra (Blade Energy Partners) | Bedoya, Jorge (Blade Energy Partners) | Cenberlitas, Serkan (Blade Energy Partners) | Bacon, Will (Blade Energy Partners) | Gabaldon, Oscar (Blade Energy Partners) | Brand, Patrick R (Blade Energy Partners)
Implementation of Managed Pressures Drilling (MPD) techniques provide substantial advantages for addressing difficulties in challenging wells. These benefits include not only the early influx and loss detection, but also Dynamic Influx Management. MPD provides the ability to circulate out an influx at drilling circulation rates while remaining within the primary well control barrier. Dynamic influx management is a trending topic within the industry, with its importance capturing the attention of planning and operational teams, regulatory bodies, and industry interest groups tasked with the development of recommended practices. Evolving from conventional kick tolerance to MPD kick tolerance has enabled dynamic influx management milestones, such as the adoption of the MPD operational matrix. More recently, the novel approach of the Influx Management Envelope (IME) has been increasingly adopted by the industry. This paper presents the state-of-the-art engineering analysis and operational considerations for dynamic influx management during MPD operations. As part of an integrated approach, this work considers three main aspects; 1) MPD kick tolerance, including concepts and its variables of interest, 2) IME generation and parameter sensitivity analysis, 3) generation of an MPD operational matrix. In addition, the advantages and disadvantages of various approaches to determining the limits of dynamic influx circulation are discussed.
The Influx Management Envelope (IME) assists in identifying influx conditions which could compromise the primary well barrier and fluid handling capacity on surface. IME boundaries are influenced by changes in parameters such as mud weight, wellbore depth and geometry, pump rate, surface pressure, etc. Thus, any changes to these parameters will change the acceptable influx volume and intensity for Dynamic Influx Management. It is, therefore, critical to understand how changes in each of these variables affect IME limits so that its validity can be established within parameter ranges, rather than only for discrete values.
This work presents an in-depth discussion of how IME limits are determined, with both detailed philosophical and practical guidance on methods to calculate the surface and subsurface limits. Recent deepwater applications of the IME are used to represent baselines for presenting methods of calculating IME limits, including a basic single bubble approach, through to the most robust approach of including transient, multiphase simulations. Parameter sensitivity analyses are performed to determine reasonable ranges for which an IME is valid, with the goal of understanding the required IME update frequency during operation.
Moghazy, Sharief (Shell International Exploration and Production Inc.) | Gaviria, Wilmer (Shell International Exploration and Production Inc.) | Van Noort, Roger (Shell International Exploration and Production Inc.) | Kozlov, Anton (Blade Energy Partners, Ltd.) | Gonzalez Luis, Romar Alexandra (Blade Energy Partners, Ltd.) | Gabaldon, Oscar (Blade Energy Partners, Ltd.) | Hester, Clayton (Blade Energy Partners, Ltd.)
The objective of the paper is to present a case where a Managed Pressure Drilling (MPD) and an MPD Well Design process was used to design and drill a deepwater exploration well with an expected pressure ramp and narrow drilling margins while acquiring valuable subsurface data. The expected pressure ramp and narrow drilling margins combined with the uncertainty of subsurface data presented significant challenges to the well design team. Based on previous experience in the region, reaching well TD safely and efficiently using conventional drilling methods was predicted to be challenging. The MPD Well Design process enabled MPD techniques, including constant bottom hole pressure and dynamic influx management, to be integrated into well design process. MPD was also identified as a critical tool to collect dynamic pressure data and help reduce overpressure uncertainty. The drilling program, rig specific operations, and contingency procedures were developed accordingly. MPD was used to successfully drill through a pore pressure ramp and address a well control event in conjunction with conventional methods. MPD was also an enabler to optimize the location of the casing/liner shoes by identifying the pressure profile based on real-time pore pressure data. This feature was a key advantage to drilling deeper than planned and resulted in effectively saving one casing string. The proposed well design included five casing/liners, with potential for two contingencies. With the implementation of MPD, the actual well was drilled with four casings/liners to a deeper TD and met all evaluation objectives under budget. This paper presents a case for using MPD and the MPD Well Design process and its full capabilities to optimize all aspects of a well delivery process, including well design, safety, and subsurface data acquisition.
Fernandes, Andre Alonso (Petrobras) | Vanni, Guilherme Siqueira (Petrobras) | Martinello, Isac Alexandre (Petrobras) | Terra, Felipe de Souza (Petrobras) | Sales, Ivan Mendes (Petrobras) | Guedes, Jonas (Petrobras) | Vasconcelos, Kelliton da Silva (Petrobras)
Manage Pressure Drilling is not a new technology, but the transition from land operation to floaters is still recent. This created a situation where drilling contractors and operators are still learning what the true capabilities of the technology are.
MPD technology adoption on floaters can be divide it in 3 different phases: Use for Early Kick Detection and wellbore stability improvement; Introduction of Hydrostatically Underbalanced fluid; Influx circulation through the MPD system;
Use for Early Kick Detection and wellbore stability improvement;
Introduction of Hydrostatically Underbalanced fluid;
Influx circulation through the MPD system;
In the first phase most of the procedures and barrier concepts stay untouched.
After eliminating initial skepticism, second phase commences. Hydrostatic pressure exerted by the fluid is inferior to the formation pressure. Primary barrier concept alters. The technology can be applied to drill wells with narrow operational windows, unviable conventionally.
Finally, third phase starts with very limited volumes being allowed to be circulated through the MPD system. After first successful influx circulations through the MPD system, increased volumes may be encouraged to be circulated through the primary barrier.