Preventing Differential Sticking and Mud Losses Drilling through Highly 
Depleted Sands. Fluids and Geomechanics Approach

Benaissa, Saddok; Bachelot, Alain; Ricaud, Jean; Arquey, Gerard; Yi, Xianjie; Ong, Seehong

doi:10.2523/92266-ms

Cited by 9 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…VF (mL) ER (mm) CPD FA 1 4,9 0,417 0,121 FA 2 3,0 0,605 0,126 FA 3 6,0 0,386 0,144 FA 4 3,4 0,624 0,141 FA 5 4,9 0,368 0,110 FA 6 3,1 0,461 0,110 FA 7 5,6 0,285 0,147 FA 8 3,4 0,505 0,142 Tabela 4. Análise de variância dos fluidos argilosos não envelhecidos Fonte de variação VF ER CPD Coeficiente de correlação (R) 0,99 0,99 0,99 % de variação explicada (R 2 ) 99,9 99,2 99,9 F calculado /F tabelado 0,638 0,092 1,037 Modelos matemáticos codificados para os fluidos argilosos não envelhecidos.…”

Section: Fluidosunclassified

See 1 more Smart Citation

Influência Do Envelhecimento Térmico Nas Propriedades De Prisão Diferencial De Fluidos Argilosos

Leite¹,

Nascimento²,

Amorim³

2013

TMM

View full text Add to dashboard Cite

Este trabalho tem como objetivo avaliar a influência do envelhecimento térmico e das propriedades de filtração na prisão diferencial de fluidos de perfuração argilosos. São estudados fluidos argilosos aditivados com dispersantes ensaiados à temperatura ambiente e após envelhecimento térmico. Os fluidos de perfuração foram submetidos ao envelhecimento térmico em câmara de envelhecimento rotativa Roller Oven da Fann a 93,3°C (200°F) por 16 horas. São determinados o volume de filtrado (VF) e o coeficiente de prisão diferencial (CPD) no equipamento Differential Sticking Tester da Fann sob um diferencial de pressão de 477,5 psi. A espessura de reboco (ER) é determinada em um extensômetro. De acordo com os resultados, pode-se concluir que: o envelhecimento térmico tem influência significativa no VF e na ER dos fluidos argilosos estudados. Além disto, fica evidenciado que o risco de prisão por diferencial de pressão dos fluidos não é influenciado pelo envelhecimento térmico a 93,3°C.

show abstract

Section: Fluidosunclassified

“…Sua ocorrência representa tempo não produtivo de sonda. (2) Esse problema pode ser dividido em dois tipos: prisão mecânica e prisão diferencial. A prisão mecânica é causada por uma obstrução ou restrição física e ocorre quando a coluna de perfuração está em movimento e a circulação do fluido fica impedida.…”

Section: Introductionunclassified

Influência Do Envelhecimento Térmico Nas Propriedades De Prisão Diferencial De Fluidos Argilosos

Leite¹,

Nascimento²,

Amorim³

2013

TMM

View full text Add to dashboard Cite

show abstract

“…Hence, successfully and economically drilling through depleted zones becomes significant either in maintaining oil production levels or in reaching new hydrocarbon targets. However, a variety of drilling accidents happen frequently, such as differential pressure sticking, lost circulation, and so on, which seriously restrict the drilling efficiency and successfully reaching untapped reservoirs [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Moderate Collapse in a Shale Cap of a Nearly Depleted Reservoir

et al. 2017

View full text Add to dashboard Cite

Abstract:Reservoir depletion will cause the safe equivalent circulation density (ECD) operating window of drilling fluids to narrow, or even disappear. Previous studies have proposed a set of two specific casings at the top and bottom of the depleted reservoir, respectively, or conducted wellbore strengthening to increase fracture pressure, but these will cause a waste of time and costs, or differential pressure sticking. Aiming at resolving this problem, a novel concept and evaluation method of moderate collapse in the shale cap was developed and case calculations were performed. The results show that the degree of collapse is different for wells drilled in different types of fault regimes, and it can be controlled by optimizing the well trajectory. The collapse pressure within the shale cap was decreased due to reservoir depletion, and when a certain degree of collapse was acceptable, the collapse pressure can be even lower and a safe operating window will appear which can be beneficial to optimizing the casing program and drilling design. The research results provide a theoretical basis and new design idea for successfully and economically drilling into new untapped reservoirs in deeper horizons through depleted zones in the future.

show abstract

Wellbore Cooling as a Means To Permanently Increase Fracture Gradient

Gil

Roegiers

Moos³

2006

SPE Annual Technical Conference and Exhibition

View full text Add to dashboard Cite

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn recent years, several techniques have been proposed to increase the fracture gradient by inducing changes in the near wellbore region (Alberty and McLean, 2004;Sweatman, et al., 2004;Benaissa et al., 2005). This process, often called "wellbore strengthening", has most recently been implemented by adding specially designed proppant material to the mud before raising its pressure above the fracture gradient. The goal was to induce short tensile fractures in the vicinity of the wellbore wall which are prevented from propagating; thus, creating a "stress cage". However, this method has often proven ineffective in low permeability formations where mainly uncontrolled fracture propagation occurs.The purpose of this paper is to propose and evaluate the use of wellbore cooling, in combination with more classical stengthening processes, to permanently increase the fracture gradient without the risk of circulation losses inherent in the "stress cage" method, as it is currently applied. This approach involves lowering the temperature of the drilling mud; thus, reducing the hoop stress at the borehole wall and then 'setting' the stress cage in the standard manner. Tensile cracks can then be induced at significant lower mud weights. Given the typical thermal conductivity properties of rocks, the tensile stresses induced by cooling (and consequently, the created fractures) will tend to be confined to the near wellbore region.This work presents an evaluation of the effect cooling has on the stress profile of a "solid" material and compares it with a fully coupled thermoporoelastic solution. The results of such analyses may then be used to design a field application to test this novel idea.

show abstract

Preventing Differential Sticking and Mud Losses Drilling through Highly Depleted Sands. Fluids and Geomechanics Approach

Cited by 9 publications

References 8 publications

Influência Do Envelhecimento Térmico Nas Propriedades De Prisão Diferencial De Fluidos Argilosos

Influência Do Envelhecimento Térmico Nas Propriedades De Prisão Diferencial De Fluidos Argilosos

Moderate Collapse in a Shale Cap of a Nearly Depleted Reservoir

Wellbore Cooling as a Means To Permanently Increase Fracture Gradient

Contact Info

Product

Resources

About