Utilizing Wired Drill Pipe Technology During Managed Pressure Drilling Operations to Maintain Direction Control, Constant Bottom-hole Pressures, and Well-bore Integrity in a Deep, Ultra-depleted Reservoir

Abstract This paper reviews the recently concluded successful application of a Managed Pressure Drilling (MPD) system on a High-Pressure High-Temperature (HPHT) well with Narrow Mud Weight Window (NMWW) in the UK sector in the Central North Sea. Well-A was drilled with the Constant Bottom Hole Pressure (CBHP) version of MPD with a mud weight statically underbalanced and dynamically close to formation pore pressure. Whilst drilling the 12-1/2" section of the well with statically under-balanced mud weight, to minimize the overbalance across the open hole, an influx was detected by the MPD system as a result of drilling into a pressure ramp. The MPD system allowed surface back pressure to be applied and the primary barrier of the well re-established, resulting in a minimal influx volume of 0.06 m3 and the ability to circulate the influx out by keeping the Stand Pipe Pressure (SPP) constant while adjusting Surface Back Pressure (SBP) through the MPD chokes in less than 4 hours with a single circulation. After reaching the 12-1/2" section TD, only ~0.025sg (175 psi) Equivalent Mud Weight (EMW) window was available to displace the well and pull out of hole (POOH) the bottom hole assembly (BHA) therefore, 3 × LCM pills of different concentrations were pumped and squeezed into the formation with SBP to enhance the NMWW to 0.035sg EMW (245 psi) deemed necessary to kill the well and retrieve BHA. MPD allowed efficient cement squeeze operations to be performed in order to cement the fractured/weak zones which sufficiently strengthened the well bore to continue drilling. A series of Dynamic Pore Pressure and Formation Integrity Tests (DPPT and DFIT) were performed to evaluate the formation strength post remedial work and to define the updated MMW. Despite the challenges, the MPD system enabled the delivery of a conventionally un-drillable well to target depth (TD) without any unplanned increase/decrease in mud weight or any costly contingency architecture operations, whilst decreasing the amount of NPT (Non Productive Time) and ILT (Invisible Lost Time) incurred. This paper discusses the planning, design, and execution of MPD operations on the Infill Well-A, the results achieved, and lessons learned that recommend using the technology both as an enabler and performance enhancer.

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An Innovative Fluid Pressure Transmission Pill Successfully Used During Managed-Pressure Drilling Operations in an HTHP Environment

10.2118/112528-ms ◽

2008 ◽

Author(s):

Egil Ronaes ◽

Ole Iacob Prebensen ◽

Renate Mikalsen ◽

Knut Taugbol ◽

Svein Syltoy ◽

...

Keyword(s):

Fluid Pressure ◽

Managed Pressure Drilling ◽

Pressure Transmission ◽

Drilling Operations

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First MPD Project in Myanmar Successfully Completed on Deepwater Exploration Well

10.2118/200995-ms ◽

2021 ◽

Author(s):

Harpreet Kaur Dalgit Singh ◽

Bao Ta Quoc ◽

Benny Benny ◽

Ching Shearn Ho

Keyword(s):

Pore Pressure ◽

Control Device ◽

Back Pressure ◽

Deepwater Drilling ◽

Hole Pressure ◽

Bottom Hole Pressure ◽

Bottom Hole ◽

Managed Pressure Drilling ◽

Pore Pressure Prediction ◽

Exploration Well

Abstract With the many challenges associated with Deepwater Drilling, Managed Pressure Drilling has proven to be a very useful tool to mitigate many hurdles. Client approached Managed Pressure Drilling technology to drill Myanmar's first MPD well on a Deepwater exploration well. The well was drilled with a Below Tension Ring-Slim Rotating Control Device (BTR-S RCD) and Automated MPD Choke System installed on semi-submersible rig, Noble Clyde Boudreaux (NCB). The paper will detail MPD objectives, application and well challenges, in conjunction with pore pressure prediction to manage the bottom hole pressure to drill to well total depth safely and efficiently. This exploration well was drilled from a water depth of 590m from a Semisubmersible rig required MPD application for its exploratory drilling due to uncertainties of drilling window which contained a sharp pressure ramp, with a history of well bore ballooning there was high potential to encounter gas in the riser. The Deepwater MPD package integrated with the rig system, offered a safer approach to overcome the challenges by enhanced influx monitoring and applying surface back pressure (SBP) to adjust bottom hole pressures as required. Additionally, modified pore pressure hunting method was incorporated to the drilling operation to allow more accurate pore pressure prediction, which was then applied to determine the required SBP in order to maintain the desired minimum overbalance while drilling ahead. The closed loop MPD circulating system allowed to divert returns from the well, through MPD flow spool into MPD distribution manifold and MPD automated choke manifold system to the shakers and rig mud gas separator (MGS). The automated MPD system allows control and adjustments of surface back pressure to control bottom hole pressure. MPD technology was applied with minimal overbalance on drilling and connections while monitoring on background gases. A refined pore pressure hunting method was introduced with manipulation of applied surface back pressure to define this exploration well pore pressure and drilling window. The applied MPD Deepwater technique proved for cost efficiency and rig days to allow two deeper casing setting depths and eliminating requirement to run contingency liners. MPD system and equipment is proving to be a requirement for Deepwater drilling for optimizing drilling efficiency. This paper will also capture detailed lesson learned from the operations as part of continuous learning for improvement on Deepwater MPD drilling.

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Evaluating control designs for co-ordinating pump rates and choke valve during managed pressure drilling operations

2009 IEEE International Conference on Control Applications ◽

10.1109/cca.2009.5281013 ◽

2009 ◽

Cited By ~ 7

Author(s):

Oyvind Breyholtz ◽

Gerhard Nygaard ◽

John-Morten Godhavn ◽

Erlend H. Vefring

Keyword(s):

Managed Pressure Drilling ◽

Drilling Operations ◽

Control Designs

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Research on Overflow Monitoring Mechanism Based on Downhole Microflow Detection

Mathematical Problems in Engineering ◽

10.1155/2014/676290 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Liang Ge ◽

Ze Hu ◽

Ping Chen ◽

Lei Shi ◽

Qing Yang ◽

...

Keyword(s):

Flow Rate ◽

Flow Measurement ◽

Drilling Fluid ◽

Rate Variation ◽

Lost Circulation ◽

Bottom Hole ◽

Managed Pressure Drilling ◽

Type Flow ◽

Drilling System ◽

The Cost

The flow rate variation of the drilling fluid and micro-overflow loss is difficult to analyze. The purpose to prevent the occurrence of kick, lost circulation, and other complex conditions is not easy to be achieved. Therefore, the microflow-induced annulus multiphase flow rate and annulus pressure field model were studied, and a downhole microflow measurement system has been developed. A differential pressure type flow measurement was used in the system, and real-time downhole information was obtained to achieve deep, narrow windows and other safety-density complex formation security. This paper introduced a new bottom-hole flow meter which can measure the annular flux while drilling and monitor overflow and circulation loss. The accuracy and reliability of the MPD (managed pressure drilling) system can be improved obviously by applying the device; as a result, the safety of drilling is enhanced and the cost is reduced.

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Similar Constructing Method for Solving the Model of the Plane Radial Flow of Dual Permeability Reservoir

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.419.43 ◽

2013 ◽

Vol 419 ◽

pp. 43-50 ◽

Cited By ~ 1

Author(s):

Cong Yin Fan ◽

Shun Chu Li ◽

Dong Dong Gui ◽

Ming Hu ◽

Hui Chun Li

Keyword(s):

Boundary Value Problem ◽

Radial Flow ◽

Boundary Value ◽

Outer Boundary ◽

Structural Formula ◽

Constructive Method ◽

Well Bore ◽

Bottom Hole ◽

Constant Rate ◽

Seepage Model

A seepage model of producing at a constant rate, based on the three outer boundary (infinite, closed, constant value) conditions and regardless of the well-bore storage and skin effects, is established for the problem of the plane radial flow of dual permeability reservoirs. Firstly, we get dimensionless model by introducing the dimensionless variables. Second, we obtain a boundary value problem of ordinary differential equation in the Laplace space by using the Laplace transformation. Finally, we prove that the solution to the boundary value problem has similar structural formula. Therefore a new method for solving such seepage model is obtainedSimilar Constructive Method (shortened as SCM). And then, according to the modified numerical inversion formula of Stehfest, we draw the curves of bottom-hole under the three kinds of outer boundary conditions by using MATLAB.

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