A Proposed Method for Planning the Best Initial Response to Kicks Taken During Managed-Pressure-Drilling Operations

Smith, John R.; Patel, Bhavin

doi:10.2118/143101-pa

Cited by 17 publications

(4 citation statements)

References 9 publications

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“…Das et al (2008) compared different initial responses to kicks taken during managed pressure drilling through a simulation study. According to Smith and Patel (2012), four potentially relevant responses could be taken during MPD operations that include: increasing the casing pressure, shutting in the well, using an adaptation of an MPD-pump shutdown schedule to detect and shut in a low-rate kick and increasing the pump rate. Davoudi et al (2010) evaluated nine responses (5 non-circulating and 4 circulating) to kick during managed pressure drilling.…”

Section: Literature Reviewmentioning

confidence: 99%

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Taking the Proper Action to Gas Influx during Constant Bottom-Hole Pressure Technique of Managed Pressure Drilling

Vajargah

Miska

et al. 2013

All Days

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Managed Pressure Drilling (MPD) techniques rely on precisely controlling annular pressure profile and hence enabling us to overcome challenges due to narrow mud window in offshore and deep-water drilling. In a Constant Bottom-Hole Pressure (CBHP) MPD the bottom-hole pressure is kept relatively constant which allows circulating small influxes out of the well without shutting in. However, during circulation, annular pressure must not exceed the fracture pressure of the weak zones and maximum allowable surface pressure. Therefore, accurate prediction of the annular pressure profile is vital in the decision making process. It enables us to decide whether to continue drilling, shut in the well or take another action such as increasing the pump rate or mud weight.Most of the annular pressure prediction methods during entrance of an influx rely on simplifying assumptions that can cause a significant error and a faulty well design. This issue becomes more important during drilling with Synthetic Based Mud (SBM) in which solubility of gas in the mud cannot be ignored.We attempt to present a transient model for an accurate prediction of annular pressure profile during well control operations in CBHP technique of MPD. The presented model is developed based on the conservation equations and it takes the solubility of gas in synthetic based mud into account. The validity of the model has been tested against the available experimental data from the field scale low-pressure flow loop (8" X 4.5", 90' long) available at The University of Tulsa.Annular pressure profile and maximum surface pressure (casing peak pressure) during circulation of a gas influx are calculated by the introduced transient two-phase model. A chart based methodology and a simple algorithm are developed by which, the proper action could be taken according to the simulation results. This provides a powerful decision making and design tool in MPD operations that ensures delivery of safer wells with lower Non Productive Time (NPT).

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Section: Literature Reviewmentioning

confidence: 99%

“…However, installing RCD permits circulation of the influx without shutting-in the well (Smith and Patel, 2012). However, installing RCD permits circulation of the influx without shutting-in the well (Smith and Patel, 2012).…”

Section: Literature Reviewmentioning

confidence: 99%

Taking the Proper Action to Gas Influx during Constant Bottom-Hole Pressure Technique of Managed Pressure Drilling

Vajargah

Miska

et al. 2013

All Days

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“…In fact, the multi-phase flow models in annulus has been widely studied, and these models are used to solve gas kick related issues in deep-water drilling, such as kick models development (Yin et al, 2017;Smith and Patel, 2012;Wang and Sun, 2014), kick detection methods (Chris, 2016;Xu et al, 2018;Fu et al, 2015) and gas kick simulator development (Avelar et al, 2009;Starrett et al, 1990;Sun et al, 2018a, b). Based on these models, some researchers have focused on the multi-phase flow behavior in the annulus induced by hydrate decomposition.…”

Section: Buried Depthmentioning

confidence: 99%

Parameter optimization for solid fluidization exploitation of natural gas hydrate in South China Sea

Mao

Cai

Liu

et al. 2021

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PurposeThe purpose of this paper is to study the multi-phase flow behaviors in solid fluidization exploitation of natural gas hydrate (NGH) and its effect on the engineering safety.Design/methodology/approachIn this paper, a multi-phase flow model considering the endothermic decomposition of hydrate is established and finite difference method is used to solve the mathematical model. The model is validated by reproducing the field test data of a well in Shenhu Sea area. Besides, optimization of design parameters is presented to ensure engineering safety during the solid fluidization exploitation of NGH in South China Sea.FindingsTo ensure the engineering safety during solid fluidization exploitation of marine NGH, taking the test well as an example, a drilling flow rate range of 40–50 L/s, drilling fluid density range of 1.2–1.23 g/cm3 and rate of penetration (ROP) range of 10–20 m/h should be recommended. Besides, pre-cooled drilling fluid is also helpful for inhibiting hydrate decomposition.Originality/valueSystematic research on the effect of multiphase flow behaviors on the engineering safety is scare, especially for the solid fluidization exploitation of NGH in South China Sea. With the growing demand for energy, it is of great significance to ensure the engineering safety before the large-scale extraction of commercial gas from hydrate deposits. The result of this study can provide profound theoretical bases and valuable technical guidance for the commercial solid fluidization exploitation of NGH in South China Sea.

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“…Santos et al (2003) and Santos et al (2007) presented a Micro-flux control method, which is the monitoring and adjustment of return flow to control influx during drilling operations. The alternative initial responses to kicks during MPD were explored in Bacon et al (2012); Davoudi et al (2011);Smith and Patel (2012), by increasing casing pressure until flow out equals flow in. There is a significant potential to improve existing methods, and in what follows we propose a controller that automatically attenuates a kick without shutting down the pumps.…”

Section: Introductionmentioning

confidence: 99%

Automated Kick Control Procedure for an Influx in Managed Pressure Drilling Operations

Zhou¹,

Gravdal²,

Strand³

et al. 2016

MIC

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Within drilling of oil and gas wells, the Managed Pressure Drilling (MPD) method with active control of wellbore pressure during drilling has partly evolved from conventional well control procedures. However, for MPD operations the instrumentation is typically more extensive compared to conventional drilling. Despite this, any influx of formation fluids (commonly known as a kick) during MPD operations is typically handled by conventional well control methods, at least if the kick is estimated to be larger than a threshold value. Conventional well control procedures rely on manual control of the blow out preventer, pumps, and choke valves and do not capitalize on the benefits from the instrumentation level associated with MPD. This paper investigates two alternative well control procedures specially adapted to backpressure MPD: the dynamic shut-in (DSI) procedure and the automatic kick control (AKC) procedure. Both methods capitalize on improvements in Pressure While Drilling (PWD) technology. A commercially available PWD tool buffers high-resolution pressure measurements, which can be used in an automated well control procedure. By using backpressure MPD, the choke valve opening is tuned automatically using a feedback-feedforward control method.The two procedures are evaluated using a high fidelity well flow model and cases from a North Sea drilling operation are simulated. The results show that using AKC procedure reduces the time needed to establish control of the well compared to DSI procedure. It also indicates that the AKC procedure reduces the total kick size compared to the DSI procedure, and thereby reduces the risk of lost circulation.

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A Proposed Method for Planning the Best Initial Response to Kicks Taken During Managed-Pressure-Drilling Operations

Cited by 17 publications

References 9 publications

Taking the Proper Action to Gas Influx during Constant Bottom-Hole Pressure Technique of Managed Pressure Drilling

Taking the Proper Action to Gas Influx during Constant Bottom-Hole Pressure Technique of Managed Pressure Drilling

Parameter optimization for solid fluidization exploitation of natural gas hydrate in South China Sea

Automated Kick Control Procedure for an Influx in Managed Pressure Drilling Operations

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