Screening Criteria for Waterflood Projects in Matured Reservoirs: Case Study of a Niger Delta Reservoir

Imuokhuede, Peter Ibiezugbe; Ohenhen, Ikponmwosa; Olafuyi, Olalekan

doi:10.2118/203701-ms

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Waterflooding merupakan metode tahapan kedua yang paling sering digunakan karena memiliki efisiensi sapuan yang cukup tinggi serta dapat mempertahankan tekanan reservoir [1], [2]. Efisiensi kinerja waterflooding dipengaruhi oleh beberapa faktor seperti heterogenitas reservoir, sifat fisik batuan, sifat fisik fluida, serta volume air injeksi [3]- [5].…”

Section: Pendahuluanunclassified

Optimasi Volume Injeksi Pada Waterflooding Menggunakan Metode Artificial Neural Network

Putri

Erfando

2023

JSE

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Waterflooding adalah salah satu metode pemulihan sekunder yang bertujuan untuk mempertahakan tekanan reservoir. Volume air injeksi disesuaikan agar tidak terjadi penurunan oil recovery. Tujuan dari penelitian ini adalah untuk mengoptimalkan nilai Injection Volume dan Recovery Factor (RF) dengan menggunakan metode Artificial Neural Network (ANN). Parameter yang digunakan adalah porositas, permeabilitas horizontal, permeabilitas vertikal, saturasi minyak, saturasi air, kompresibilitas batuan. Software simulasi reservoir menggunakan Computer Modeling Group (CMG), kemudian optimasi menggunakan Machine Learning (ML). Pendekatan Machine Learning menggunakan rasio 0,7:0,3 untuk data pelatihan dan pengujian. kemudian dilakukan trial and error pada 10 node hidden layer. Hasil penelitian memiliki akurasi yang tinggi karena nilai R2 pada data training dan testing mendekati 1, sehingga nilai optimasi pada recovery factor sebesar 26.17%, meningkat sebesar 5.85% dari basecase dan volume injeksi sebesar 15387684 bbl atau 15.4 MMbbl.

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Section: Pendahuluanunclassified

Optimasi Volume Injeksi Pada Waterflooding Menggunakan Metode Artificial Neural Network

Putri

Erfando

2023

JSE

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Comparative Analysis of ESP-Assisted Dump-flooding and Conventional Water Injection for Enhanced Oil Recovery: A Case Study of Field ABX2 in the Niger Delta

Idahor,

Ohenhen

2024

Preprint

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This study evaluates the effectiveness of dump-flood and water injection techniques for enhanced oil recovery in Field ABX2 of the Niger Delta basin. Using advanced numerical reservoir modeling, the performance of ESP-powered dump-flooding was compared against conventional water injection over a 20-year period. Both methods successfully maintained reservoir pressure above the critical bubble point of 3471 psi, preventing excessive gas production. Primary recovery extracted only 15% of original oil in place (OOIP), while ESP-powered dump-flooding and water injection improved recovery to 34% and 35% of OOIP respectively after 20 years. Both secondary recovery methods exhibited excellent areal sweep efficiency and kept oil above the oil-water contact. The dump-flood approach achieved comparable results to water injection but with lower infrastructure requirements and costs. The models indicate the substantial aquifer in Field ABX2 can sustain dump-flooding for the full 20-year period. This study demonstrates ESP-assisted dump-flooding as a promising and economical enhanced oil recovery technique for Niger Delta reservoirs. The modeling approach developed here integrates reservoir characterization, well completion design, and long-term production forecasting to optimize recovery strategies.

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Review of Marginal Oil Resources in Highly Depleted Reservoirs

Jun¹,

Meng

Sun

et al. 2022

Processes

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The term “marginal oil resource” refers to an oil reservoir that has hydrocarbon resource preservation but cannot meet the criteria of resources under the U.S Securities and Exchange Commission (SEC) standards. When oilfields step into their late life, most of their economic petroleum reserves have been well developed, and their focuses need to be switched to their intact marginal resources. In this paper, reservoir characteristics and key petrophysical properties of marginal oil resources are introduced to classify marginal oil resources into four types for identifying potential development opportunities. Primary recovery and its following development strategy are applied to fully utilizing their economic returns. Waterflooding, low salinity waterflooding (LSW) and enhanced oil recovery processes are reviewed to illustrate its potential uplift on oil production and application challenges such as higher clay content in marginal resources than in commercial reservoirs. An oilfield is presented as a case study to demonstrate the classification of marginal resources and illustrate successful economic development including learnings and challenges. This paper highlights the development potential of marginal resources and proposes a clear guidance for policy makers on how to tailor a development strategy supporting their economic development. This review could increase certainty on forecasting performance of marginal resources.

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Screening Criteria for Waterflood Projects in Matured Reservoirs: Case Study of a Niger Delta Reservoir

Cited by 3 publications

References 2 publications

Optimasi Volume Injeksi Pada Waterflooding Menggunakan Metode Artificial Neural Network

Optimasi Volume Injeksi Pada Waterflooding Menggunakan Metode Artificial Neural Network

Comparative Analysis of ESP-Assisted Dump-flooding and Conventional Water Injection for Enhanced Oil Recovery: A Case Study of Field ABX2 in the Niger Delta

Review of Marginal Oil Resources in Highly Depleted Reservoirs

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