The Modification of the Dykstra-Parsons Method for Inclined Stratified Reservoirs

El-Khatib, Noaman

doi:10.2118/140960-pa

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…The former is represented by the IV value; since a more uniform inflow rate distribution along the length of the completion will enhance the long-term objectives. (El-Khatib, 2012 showed that the breakthrough time, fractional recovery and water cut of a heterogeneous reservoir are all a function of the IV value for an OH well. )…”

Section: Figure 5-universal Type Curves Of Well Productivity Ratio (Pmentioning

confidence: 99%

Rapid Design of an Inflow Control Device Completion in Heterogeneous Clastic Reservoirs Using Type Curves

Prakasa¹,

Muradov²,

Davies³

2015

SPE Offshore Europe Conference and Exhibition

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A near-uniform well (production) inflow or (injection) outflow profile delays early water breakthrough and further decreases water cut which results in higher oil recovery. Field experience has shown that wells producing from, or injecting into, multiple layers and/or reservoirs benefit from an Inflow Control Device (ICD) completion's ability to reduce the in/out-flow imbalance along its length. The standard ICD completion design workflow involves selection of the "strength" of the ICD's restriction based on the incomplete knowledge of the reservoir that is available prior to drilling the well with several commercial softwares available for this.However, more complete reservoir data becomes available once the drilled completion zone has been logged and the data analysed. There follows a short period of time during which the engineer must judge whether the planned ICD completion design is "fit-for-purpose" or needs further consideration. The availability of a rapid ICD completion design methodology that does not require access to computationally demanding commercial software would be highly beneficial at this time.This paper presents a workflow which meets the above requirements. It extends our previous analytical approach to ICD sizing to directly relate the uniform-strength ICD completion design to the predicted heterogeneity of the open-hole inflow profile together with the consequent loss in well productivity from the ICD's flow restriction. The workflow combines a series of dimensionless, universal type curves and analytical solutions in a relatively simple and fast process to find the desired ICD design. A new completion design can be made immediately after drilling has been completed to provide the desired level of inflow variation from the latest predicted level of reservoir and fluid inflow heterogeneity determined by a "quick-look" evaluation of the well's log data. The same design procedure can be used to select ICD completion designs that are a compromise between two competing objectives: increasing the uniformity of the inflow profile and minimising the reduction of the well's productivity index that results from the extra pressure losses imposed by the ICDs.Two typical examples of the workflow's application are provided. The first one examines whether it is necessary to change the ICD completion design when drilling problems result in a reduction of the well's completion length. The second example evaluates the impact of the actual reservoir permeability profile being more heterogeneous than originally expected. The workflow's design philosophy was confirmed by commercial numerical simulators recommending the same ICD completion design in both cases.This work extends our earlier analytical approach to ICD sizing. This new ICD completion design workflow can be used by completion design engineers to rapidly analyse uniform-strength ICD completion design options and their consequences on well inflow performance without expensive computational resources. The underlying principles, assumptions and applica...

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Section: Figure 5-universal Type Curves Of Well Productivity Ratio (Pmentioning

confidence: 99%

Rapid Design of an Inflow Control Device Completion in Heterogeneous Clastic Reservoirs Using Type Curves

Prakasa¹,

Muradov²,

Davies³

2015

SPE Offshore Europe Conference and Exhibition

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“…Tian et al [26] studied the influence of strata pinch out and lens on vertical interlayer interference tests by establishing a three-layer model. Using the theory of B-L displacement mathematical model, Noaman et al [27][28][29] analyzed the influence of gravity number, mobility ratio, permeability variation coefficient and liquidity on waterflooding performance in inclined multilayer reservoirs, and compared the finding with the D-P method. Guo [30] established the low permeability gas reservoir model for multilayer commingling production, considering the Darcy flow and the starting pressure gradient in both cases.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs

Shen

Cheng

Sun³

et al. 2018

Energies

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Recently, commingling production has been widely used for the development of offshore heavy oil reservoirs with multilayers. However, the differences between layers in terms of reservoir physical properties, oil properties and pressure have always resulted in interlayer interference, which makes it more difficult to evaluate the producing degree of commingled production. Based on the Buckley–Leverett theory, this paper presents two theoretical models, a one-dimensional linear flow model and a planar radial flow model, for water-flooded multilayer reservoirs. Through the models, this paper establishes a dynamic method to evaluate seepage resistance, sweep efficiency and recovery percent and then conducts an analysis with field data. The result indicates the following: (1) the dynamic difference in seepage resistance is an important form of interlayer interference during the commingled production of an offshore multilayer reservoir; (2) the difference between commingled production and separated production is small within a certain range of permeability ratio or viscosity ratio, but separated production should be adopted when the ratio exceeds a certain value.

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Performance evaluation of commingled production in a multilayer oil reservoir based on microscopic pore-throat structures

Wang

Tian

Wang

et al. 2023

Fuel

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The Modification of the Dykstra-Parsons Method for Inclined Stratified Reservoirs

Cited by 5 publications

References 30 publications

Rapid Design of an Inflow Control Device Completion in Heterogeneous Clastic Reservoirs Using Type Curves

Rapid Design of an Inflow Control Device Completion in Heterogeneous Clastic Reservoirs Using Type Curves

Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs

Performance evaluation of commingled production in a multilayer oil reservoir based on microscopic pore-throat structures

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