Breaking Oil Recovery Limit in Malaysian Thin Oil Rim Reservoirs: Water Injection Optimization

Chan, Keng Seng; Kifli, Azmukiff Muhammed; Darman, Nasir B.

doi:10.2523/iptc-14157-ms

Cited by 6 publications

(1 citation statement)

References 6 publications

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“…2). 3,4). Most critically, uncertain oil rim vertical and lateral migration affected the existing well production and greatly increased the risk of infill well drilling programs.…”

Section: Force Balance In Thin Oil-rim Reservoirsmentioning

confidence: 99%

Smart Horizontal Well Drilling and Completion for Effective Development of Thin Oil-Rim Reservoirs in Malaysia

et al. 2014

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For thin oil-rim reservoirs, well placement, well type, well path and the completion methods shall be evaluated with close integration of key reservoir and production engineering considerations. This involves maximizing reservoir fluid contact and drainage, optimizing the well productivity, and optimizing well life-cycle production profile along the wellbore. Field implementation cases in Malaysia have been shown that this integrated approach to design and drill horizontal wells can significantly minimize the well count, enhance the well performance, and improve the ultimate recovery per well in thin oil-rim reservoirs with varying reservoir complexity and uncertainties. 45 horizontal wells were progressively drilled and all completed with ICD in a relatively flat thin oil-rim reservoir offshore in peninsular Malaysia. In this successful oil development, well path between the GOC and OWC was optimized to delay the water breakthrough and reduce the decline trend in different reservoir sectors with varying horizontal well length up to Ͼ 2,000 m. Good performance of the ICD was confirmed by PLT surveys and by tracer effluents evaluation with different type of tracers implemented in various sections of the horizontal well completion.For a low pressure thinner oil-rim reservoir in offshore Sabah, horizontal wells were drilled with ICV completed in the gas cap. This smart well design enables having in-situ gas lift operation during the initial oil production, and progressively changing to the planned gas-cap blow-down operation for maximizing the overall hydrocarbon recovery. In another oil-rim reservoir, a long horizontal wellbore with ICD design was completed with dual-strings to further optimize drawdown pressure distribution along the long wellbore and improve oil drainage and oil recovery.This paper is to share not only the lessons learnt in drilling and completion of these smart horizontal wells but also illustrate the impact of these smart well designs in adding values to the field development projects.

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“…2). 3,4). Most critically, uncertain oil rim vertical and lateral migration affected the existing well production and greatly increased the risk of infill well drilling programs.…”

Section: Force Balance In Thin Oil-rim Reservoirsmentioning

confidence: 99%

Smart Horizontal Well Drilling and Completion for Effective Development of Thin Oil-Rim Reservoirs in Malaysia

et al. 2014

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Optimization guideline for thin oil rim reservoir development

Alokla,

Maalouf,

Ghorayeb

2024

Fourth International Meeting for Applied Geoscience &Amp; Energy

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Proposed Technique for Improved Oil Recovery from Thin Oil Rim Reservoirs with Strong Aquifers and Large Gas Caps

Ogolo

Molokwu²,

Onyekonwu

2017

Day 2 Tue, August 01, 2017

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Oil production from thin oil rim reservoirs with strong aquifers and large gas caps is challenging due to early gas and water breakthrough, movement of the fluid contacts and low oil recovery factor. One means of handling the problems associated with thin oil reservoirs is the use of horizontal wells which improves recovery factor. This work however proposes a measure through which gas injection into the reservoir is used to improve oil recovery factor and minimize water production using vertical wells. A simulation study was carried out using the data from a thin oil rim reservoir in the Niger Delta. The five cases studied are the base case (using conventional vertical wells), use of horizontal wells, water production and disposal, water production and re-injection into the oil zone to improve recovery, and gas injection at the oil water contact. The recovery factor and volume of produced water were compared for all five cases for a production period of 40years. An oil recovery factor of 25%, 29%, 40%, 33% and 44% were obtained for the base case, use of horizontal wells, water production and disposal, water production and re-injection to improve recovery, and gas injection at the oil water contact respectively. Volume of produced water was lowest while the GOR was highest for the proposed method than any other method. The main disadvantage using the approach of injecting gas at the water oil contacat is the high GOR however; recycling the gas by injecting the produced gas back into the gas cap is a viable solution. The relatively higher oil recovery factor and minimal volume of produced water which are highly desired for effective production from thin oil reservoirs makes the proposed technique worth investigating.

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Breaking Oil Recovery Limit in Malaysian Thin Oil Rim Reservoirs: Water Injection Optimization

Cited by 6 publications

References 6 publications

Smart Horizontal Well Drilling and Completion for Effective Development of Thin Oil-Rim Reservoirs in Malaysia

Smart Horizontal Well Drilling and Completion for Effective Development of Thin Oil-Rim Reservoirs in Malaysia

Optimization guideline for thin oil rim reservoir development

Proposed Technique for Improved Oil Recovery from Thin Oil Rim Reservoirs with Strong Aquifers and Large Gas Caps

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