A new numerical well testing approach: Application to characterization of complex fault structures

Pouladi, Behzad; Sharifi, Mohammad; Akbari, Mohammad Reza; Hosseini-Nasab, S. M.

doi:10.1016/j.petlm.2018.07.001

Cited by 6 publications

(8 citation statements)

References 17 publications

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“…Pan et al [30] proposed a systematic workflow to integrate well testing data of a single well in a discrete fracture/matrix (DFM) model or a dual-porosity dualpermeability (DPDK) model for optimizing recovery. Pouladi et al [31] developed a numerical model considering complex fault structures to investigate fluid flow characteristics. However, the above models do not fully view the actual and specific fracture information near the wellbore.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Approach of Numerical Well Test for Well Intersecting Fractures Based on FMI Image

Jin

Xing

et al. 2022

Lithosphere

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Fluid flow is strongly affected by fractures in unconventional reservoirs. It is essential to deeply understand the flow characteristics with fractures for improving the production and efficiency of unconventional reservoir exploitation. The purpose of this work is to develop an accurate numerical model to evaluate the transient-pressure response for well intersecting fractures. The meshes generated from Fullbore Formation Micro-Imager (FMI) images ensure an efficient numerical description of the geometries for fractures and interlayers. The numerical simulation is implemented by an inhouse finite element method-based code and benchmarked with drill stem test (DST) data. The results show that three flow regimes appear in the reservoir with fractures within the test period: wellbore afterflow, pseudolinear flow, and radial flow. In contrast, only the wellbore afterflow and radial flow appear for the wells without fractures. The results also reveal that fractures dominate the flow near the wellbore. Verification and application of the model show the practicability of the integrated approach for investigating the transient-pressure behaviors in the unconventional reservoir.

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Section: Introductionmentioning

confidence: 99%

An Integrated Approach of Numerical Well Test for Well Intersecting Fractures Based on FMI Image

Jin

Xing

et al. 2022

Lithosphere

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“…Identifying faults and flow barriers in the reservoir of interest and adequately quantifying the transmissibilities across these barriers and their extents enable proper evaluation of fluid flow directions within the reservoir. Thus, they are crucial in reservoir characterization (Mohamdally et al, 2018;Pouladi et al, 2018). Faults are typically sealing or non-sealing.…”

Section: Introductionmentioning

confidence: 99%

“…Sealing faults completely stop lateral flow, while non-sealing (or leaky) faults reduce the cross-fault rate of flow. This is because, the transmissibilities across non-sealing faults are typically less than undisturbed permeable strata (Ogali and Orodu, 2020;Pouladi et al, 2018;Yaxley, 1987).…”

Section: Introductionmentioning

confidence: 99%

Fault characterization and flow barrier detection using capacitance-resistance model and diagnostic plots

Ogali

Orodu

2022

Journal of Petroleum Science and Engineering

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“…Na Análise de Testes de Pressão, um dos ramos da Engenharia de Reservatórios de Petróleo [1,6,14,23], temos por meta a caracterização do sistema poço-reservatório através da solução de problemas inversos, utilizando dados de testes de pressão em poços. Desta forma, é possível obtermos as propriedades do sistema poçoreservatório, utilizadas posteriormente como uma estimativa acurada das características do sistema, de forma a permitir uma melhor escolha da estratégia de produção.…”

Section: Introductionunclassified

Revisão e Implementação de Soluções Analíticas para a Determinação da Pressão em Poços de Petróleo

Cariello

Honorio

Souza³

et al. 2020

CALIBRE

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A Análise de Testes de Poços é um ramo da Engenharia de Reservatórios no qual empregamos dados de pressão de poço a partir de testes de produção/injeção de fluido em conjunto com modelos físico-matemáticos para caracterizar o sistema poço-reservatório, usando problemas inversos. Nessas situações, aplicamos amplamente soluções analíticas e semianalíticas do modelo físico-matemático que descreve o fluxo. Nesse contexto, o objetivo do presente estudo é 1) realizar uma revisão bibliográfica sobre algumas das soluções analíticas clássicas para determinação da pressão no poço produtor e 2) implementar os códigos numéricos para a criação de uma biblioteca computacional, proporcionando as soluções analíticas voltadas para a determinação da pressão em poços produtores de petróleo. Os sistemas poço-reservatório estudados possuem um poço vertical e levam em consideração os efeitos de condições de contorno, a estocagem na coluna de produção do poço, dano à formação, períodos de fluxo e estática, bem como a presença de fraturas naturais. Obtivemos as soluções analíticas usando a transformada de Laplace e uma inversão numérica, utilizando o algoritmo Stehfest, para calcular a variação de pressão ao longo do tempo. Palavras-chave: Soluções Analíticas, Transformada de Laplace Inversa, Tranformada de Laplace, Algoritmo de Stehfest, Análise de Teste de Poço.===================================================================Well Testing Analysis is a branch of Reservoir Engineering, in which we employ well pressure data from production tests/fluid injection in conjunction with physical-mathematical models to characterize the well-reservoir system, using inverse problems. In these situations, we widely used analytical and semi-analytical solutions of the physical-mathematical model that describes the flow. In this context, the objective of this work is to 1) carry out a bibliographic review on some of the classic analytical solutions for determining the pressure in the producing well and 2) implement the numerical codes for the creation of a computational library, providing the analytical solutions aimed at determining pressure in oil-producing wells. The well-reservoir systems with a vertical well take into account the boundary effects, wellbore storage, formation damage, drawdown and buildup test analysis, and the presence of natural fractures. We obtain the analytical solutions using the Laplace transform and a numerical inversion, using the Stehfest algorithm, to calculate the pressure variation in the time domain. Key words: Analytical Solutions, Inverve Laplace Transform, Laplace Transform, Stehfest Algorithm, Well Testing Analysis.

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A new numerical well testing approach: Application to characterization of complex fault structures

Cited by 6 publications

References 17 publications

An Integrated Approach of Numerical Well Test for Well Intersecting Fractures Based on FMI Image

An Integrated Approach of Numerical Well Test for Well Intersecting Fractures Based on FMI Image

Fault characterization and flow barrier detection using capacitance-resistance model and diagnostic plots

Revisão e Implementação de Soluções Analíticas para a Determinação da Pressão em Poços de Petróleo

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