Structured Approach To Matrix Stimulation Proves Successful In Oman

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractOil and gas assets in Shell Asia Pacific region formulate challenges and opportunities for improving well productivity through stimulation. Major factors limiting the activity in the past include:• Various types of reservoirs Confidence level of stimulation in Shell Asia Pacific region has been elevated. Lessons learnt and best practices established will be passed to future campaign. Stimulation is still a good means for increasing well productivity to get more oil at this high oil price time, but it has to be carried our properly.Although some success was achieved, current infrastructure for stimulation in the region still needs to be improved.

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“…2. Combine equipment (self-raising rig and barge) with pumping procedure (coiled tubing and bull-heading) to best-fit individual well condition.…”

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Stimulation in Asia Pacific Region—Challenges and Opportunities

Jin

Seah

2006

All Days

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Research of Resistance Processes of Filters in Contact With Rock

Gilaev

Khabibullin

Gilaev

et al. 2021

NGD

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Injectivity Loss in Polymer Floods: Causes, Preventions and Mitigations

et al. 2015

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Polymer flooding is an attractive option in hydrocarbon maturation plans. Several successful polymer floods and pilots have been implemented. One of the risks in polymer flooding is loss of injectivity. The consequences of loss of injectivity can be large. In conditions where matrix injection is required, reduction of injection rate may result in a much slower propagating polymer front and consequently later arrival of the anticipated oil bank eroding on the economic value of the EOR process. In extreme cases it can even lead to loss of the injector. Under fracturing conditions the loss of injectivity may be less noticeable, but it can lead to out of zone fracturing or fractures that grow too much in size and cause shortcuts to the producers or affect future infill well drilling.Reduction of injectivity is a generic concern in conventional waterfloods and can play an even larger factor when adding polymer to the waterflood. The increased viscosity of the injected polymer solution is the most obvious reason for an anticipated decrease in injectivity, but also other mechanisms can have an impact. These mechanisms include excessive polymer adsorption and associated permeability reduction, filtration of impurities in the polymer solution, fluid incompatibilities or reduced water quality.In this paper we will discuss the various causes for loss of injectivity and propose a structured approach for the associated prevention and mitigation options. Prevention includes (1) selection of the most appropriate polymer type; (2) best practices for preparation of the polymer solution; (3) safeguarding the water quality; and (4) enabling options for mitigation in case excessive injectivity loss is observed. The remediation step includes (1) the identification of the root-cause of an apparent injectivity problem; (2) the design of an appropriate clean-up treatment; (3) monitoring of the operation; and (4) implement measures to avoid repetition of the problem. We will include an overview of the preventive and mitigation options for the different causes of injectivity decline in polymer floods.

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Structured Approach To Matrix Stimulation Proves Successful In Oman

Cited by 7 publications

References 1 publication

Stimulation in Asia Pacific Region—Challenges and Opportunities

Stimulation in Asia Pacific Region—Challenges and Opportunities

Research of Resistance Processes of Filters in Contact With Rock

Injectivity Loss in Polymer Floods: Causes, Preventions and Mitigations

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