Transient Behavior of Horizontal Wells with Inflow Control Devices for Inflow Profile Modification

Poe, Bobby; Erkal, Alpay

doi:10.2118/132219-ms

Cited by 5 publications

(2 citation statements)

References 18 publications

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“…(3). The reservoir is controlled by oil rate target at 100m 3 per day, so the drop of pressure, the drop of pressure derivative, and production of a well through the two-sand bodies can be calculated at the same time by the model as is mentioned in this paper.…”

Section: Practical Example Of Calculation Analysismentioning

confidence: 99%

“…Directional well, horizontal well, multilateral well, cluster well and stepped well have always been applied in such reservoirs domestically and in other countries over the world. The stepped horizontal well which is adopted in recent years, becomes a new type, and the well structure is complex [2][3][4]. The percolation mechanism on such wells with complex well configuration mainly refers to the study of horizontal well and vertical well.…”

Section: Introductionmentioning

confidence: 99%

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Percolation Mathematical Model for Stepped Horizontal Well in Multilayer Fault Block Reservoir

Hong¹,

Jin²,

Chang³

et al. 2015

TOPEJ

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Abstract:The percolation mechanism and regularity for stepped horizontal well in multi-layer complex fault block reservoir are complex. A percolation mathematical model based on unsteady flow mathematical model is built up in this paper. In the model, the reservoir couples with one horizontal well in sealed reservoir which perforates through mutually unconnected formation. Laplace transform, Stehfest inversion and Conjugate gradient are used to solve the model. The pressure distribution results of different time and production distribution results of different well section can be obtained. The results of pressure drop and pressure drop derivative calculated by this model are close to the results calculated by the Saphir software, and the agreement rate is 99%, which proves the model is of great reliability. Compared with Saphir software, the capacity of horizontal section through multiple sand at the same time can be calculated, which is the advantage of this model. It is not suitable for heterogeneous reservoir and the reservoir with supply boundary, which is the limitation. A two-layer block fault reservoir has been used to carry out the field study through the model, simplifying the irregular shape of reservoir for rectangular reservoir at first. Then a double-stage horizontal well is used to pass through the upper layer and the lower layer orderly in this reservoir, the simulation calculation of the well can use the double-stage horizontal well model, and the model can calculate the average pressure drop and pressure drop derivative of various production phases in the bottom hole accurately .The reservoir flow stage and the flow time in different periods can be judged through pressure drop and pressure drop derivative in the bottom hole, which can also calculate the distribution of production along the horizontal section in different periods at the same time. It can provide theoretical foundation of reservoir research engineering and production engineering design for reservoir development with stepped horizontal well in multilayer complex fault block reservoir.

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Section: Practical Example Of Calculation Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Percolation Mathematical Model for Stepped Horizontal Well in Multilayer Fault Block Reservoir

Hong¹,

Jin²,

Chang³

et al. 2015

TOPEJ

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A Semi-Analytical Model for Extended-Reach Wells with Wellbore Flow Splitting; a Production Optimization Scheme

Qahtani

Hashim

Yousef

2015

Day 3 Wed, November 11, 2015

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Well design have evolved noticeably during the last decade from the design of conventional vertical wells to extended-reach/multilateral horizontal well design using directional drilling technology. Evolving horizontal well design range from simple horizontal wells with single wellbore to complex multilaterals with multiple sublaterals (fishbone wells). Furthermore, advancements in horizontal well drilling allows horizontal wells to be drilled several thousands of feet long. However, field experience and flow meter surveys on long horizontal drain-holes revealed that the frictional pressure losses in the wellbore is an important factor limiting the effective length of long horizontal wells and consequently hindering the full use of the entire length of the horizontal wells. The frictional pressure losses may be comparable with the drawdown at the producing end of the well rendering a portion of the horizontal drain-hole unproductive. Well completions have also been advancing to cope with the technological advancement in horizontal well drilling and new equipment for monitoring and subsequent selective control have been developed to optimize the productivity of the horizontal wells. The complex architecture of those wells generally makes them more expensive to drill and complete. Therefore, these wells must be planned efficiently. For these reasons we present a viable method to produce these long horizontal wells and laterals from the two ends (heel and toe) by using U-shape wells. The introduction of the U-shaped wells is driven by the need to maximize flow contribution from the entire drain-hole lengths. To confirm the viability of this idea, a rigorous semi-analytical model was developed to study the performance of the U-shape horizontal well under different production scenarios. The model incorporates the impact of wellbore hydraulics into the solution, and the U-shaped wells can be produced from both ends at constant rates to predict the pressures at the two ends. The model was used to calculate the flow profile along the horizontal section under different production scenarios. Furthermore, the model can be used as an optimization tool to maximize the benefits from long horizontal drain-hole as it allows producing the two wings at different flow rates. The U-shape wells can also be optimized to have more uniform flux distribution along the horizontal drain-hole in reservoirs subjected to water drive. The developed model can also be used to evaluate the reservoir parameters in such well architecture by calculating the classical horizontal well performance and reservoir characteristics by measuring wellbore pressure at one or both wings.

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Pressure Transient Analysis in Advanced Wells Completed with Flow Control Devices

Nikjoo¹,

Muradov²,

Davies³

et al. 2017

SPE Europec Featured at 79th EAGE Conference and Exhibition

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Inflow Control Devices (ICDs) modify the inflow profile of a multi-zone well completion. Their imposition of an extra pressure drop at the sandface has proven to be particularly effective at delaying the breakthrough of (unwanted) water or gas in wells with long completion lengths. It is widely accepted that an ICD completion improves the field's economics; but the question of whether and why an ICD completion affects the accuracy of standard Pressure Transient Analysis (PTA) workflows has not been addressed. A typical ICD completion is designed to create an extra pressure drop of a similar magnitude to the well's expected reservoir drawdown when producing at its target rate. This paper shows why this extra pressure drop cannot always be treated as an additional skin value during PTA. This is because the ICD's pressure drop is a time dependent variable, varying with both fluid's viscosity and flowrate through the device. A nonlinear pressure loss can, sometimes, distort the pressure response and render conventional PTA methods inaccurate. The study presented in this paper uses an integrated, dynamically coupled, wellbore and reservoir model to define the limits within which treating the ICD pressure drop as an additional skin is a valid assumption and when its nonlinear nature will result in an inaccurately estimated value of skin and reservoir permeability. A general workflow for the analysis of PTA data measured in liquid producing wells completed with ICDs is proposed for the derivation of realistic values of the formation damage skin. The workflow has also been adapted for routine monitoring of wells completed with ICDs. The value of this study is illustrated by its application to two data sets from the North Sea's Golden Eagle field. This is an ideal field to test the validity of our theoretical analysis due to well completions with multiple levels of inflow control together with "state-of-the-art", downhole sensors. The results of this work allows Reservoir and Production Engineers to differentiate between deteriorating well performance due to increasing watercut and that due to an increasing formation damage skin.

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Transient Behavior of Horizontal Wells with Inflow Control Devices for Inflow Profile Modification

Cited by 5 publications

References 18 publications

Percolation Mathematical Model for Stepped Horizontal Well in Multilayer Fault Block Reservoir

Percolation Mathematical Model for Stepped Horizontal Well in Multilayer Fault Block Reservoir

A Semi-Analytical Model for Extended-Reach Wells with Wellbore Flow Splitting; a Production Optimization Scheme

Pressure Transient Analysis in Advanced Wells Completed with Flow Control Devices

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