Eliminating Multiple Interventions Using a Single Rig-Up Coiled-Tubing Solution

Kumar, Santhana; Gisbergen, Stan Van; Harris, Jeremy P.; Ferdiansyah, Erik; Brady, Mark; Al-Harthy, Salah; Pandey, Arum

doi:10.2523/94125-ms

Cited by 3 publications

(1 citation statement)

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“…In general, asphaltenes deposits cause problems in five points: extraction, transportation, processing, economic benefit of crude oil, and environmental pollution. There are several methods to prevent and/or remove asphaltenes deposits: mechanical methods [10], chemical cleaning, pressure [11,12], temperature and flow rate manipulations [13], additives, and chemical inhibitors [14,15]. The conductive polymers applications are highly diverse and several studies have pointed out the different variables that affect the properties and performance of polypyrrole (PPy) electrodeposition on the steel surface such as the conductivity, stability, roughness, adhesion, film thickness, and so on [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Conducting Polymers Films Deposited on Carbon Steel and Their Interaction with Crude Oil

Vázquez‐Noriega¹,

Guzman²,

Gallardo-Rivas³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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The formation of scale/solids deposits inside the pipelines is a frequent problem in the petrochemical industry. These scales can be organic as the asphaltenes and inorganic as the accumulations of salts, which apart from blocking the inside of the pipes can also cause a change in the integrity of the steel. Therefore, it is necessary to avoid the conditions where deposition occurs, together with chemical and mechanical methods of remediation to mitigate the deposition. In this work we intend to use conductive polymers in order to inhibit the deposition of asphaltenes on carbon steel surfaces, by using polypyrrole (PPy) as material capable of conducting electrical current. The electrodeposition of PPy on carbon steel were performed by cyclic voltammetry (CV) and chronoamperometry (CA). The results showed that under certain experimental conditions it is possible to make a PPy film with adequate characteristics. Important factors were the grip and electrochemical stability of the formed film on steel, which depends on the electrosynthesis technique and in some cases favoured by a pre-treatment with a 10% HNO3 solution applied to the steel prior to electropolymerization. The PPy films deposited with pre-treatment completely covered the steel surface and showed better stability, adherence and generated a hydrophobic material.

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Section: Introductionmentioning

confidence: 99%

Conducting Polymers Films Deposited on Carbon Steel and Their Interaction with Crude Oil

Vázquez‐Noriega¹,

Guzman²,

Gallardo-Rivas³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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Minimize Risk and Improve Efficiency Associated With Electric Coiled Tubing Perforating Operations

Salsman

Neyaei

2009

SPE/IADC Drilling Conference and Exhibition

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A perforating job conveyed with electric coiled tubing (CT) was recently completed in a high angle well offshore in the UAE using a combination of several new technologies which allowed this job to be completed safely and efficiently. Perforating operations with electric coiled tubing in offshore environments with restricted space have been considered hazardous and were avoided in the past because of the requirement to connect and finally arm the gun system while working at the wellhead below the coiled tubing injection head and other heavy equipment. Following the old standard operating procedures for explosive operations, arming the gun with the explosive detonator had to be done after the electric coiled tubing head was attached to the gun string. This gun arming activity is potentially hazardous as the work is being done in a tight space below very heavy equipment hung off on a crane line. Jobs using these old operating procedures were often cancelled as the potential risk to personnel and equipment was deemed to be too high. Also the length of perforating gun that could be run in one trip was severely limited by these procedures. Recently several new perforating gun and deployment technologies have been introduced to the field that make the electric CT perforating technique much more efficient and safe compared to past operations. These technologies includeA new expendable electronic addressable switch device providing electrical control and a safety barrier to each detonatorA simplified radio safe detonator which incorporates several intrinsic safety featuresAn electric deployment bar for perforating used to deploy the guns into a live well before the electric CT is connected. In addition to the above, a CT intervention was optimized to accomplish several tasks as part of the same offshore barge visit for a rigless intervention in a producing well with one CT rig-up. In addition to the perforation runs, CT was run to acid stimulate both existing zones and the newly perforated zone in the well. CT was also used to convey production logging tools to measure the production characteristics along the entire deviated section. This paper will describe how the combination of these new and existing technologies contributed to a safe coiled tubing perforating operation, improved overall efficiency and improved production from the well. There are many opportunities worldwide for perforating with electric coiled tubing and the application of these new technologies will enable more of these jobs to be attempted and to be completed safely and efficiently. Introduction Coiled tubing (CT) is being used more and more to convey tools and perforating guns into wells where it is required to maintain wellhead pressure control and push equipment into highly deviated or horizontal sections or carry heavier loads than a wireline system can handle1. Another advantage of CT conveyance is the ability to pump fluids into the well as part of the conveyance operation. Over the past few years more and more CT equipment is being fitted with electric logging cable (e-line CT) to replicate the features available with electric wireline operations, mainly surface readout of tool measurements and, in the case of perforating, being able to establish accurate depth control, fire the guns using electric detonators and using switches to shoot perforating guns selectively.

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Case History of Cost Reduction Optimization Efforts in a Mature Field

Gisbergen¹,

Himawan²,

Kumar³

et al. 2005

SPE Middle East Oil and Gas Show and Conference

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Application of technically sound well and reservoir management (WRM) principles together with cost reduction measures utilising the latest technologies are the key to maximising economic recovery from mature reservoirs. The fields are in one cluster in Petroleum Development Oman. More than 250 major well entries are executed each year. The main measures that are applied to improve production and reduce costs are: integrated reservoir surveillance plans, better sequencing of the workover units, muli-disciplinary input to workover proposals, ESP monitoring and the introduction of new technology such as one-rig-up coiled tubing for cleanout, saturation-logging, perforation & stimulation. Together these processes have reduced well intervention costs by 20% and increased net oil gains by 10%. This paper aims to demonstrate that the application of intensive WRM techniques and appropriate technologies can reduce the unit cost for well interventions. Introduction The cluster consists of two fields in North Oman and both fields produce from the Lower Cretaceous Shuaiba Formation, which is heavily faulted and consists of intrashelf basin floor carbonate muds and limestone reef. Porosities ranges from 12 to 35% while matrix permeability ranges between 1 md to 20md. Permeabilities in fault, fracture & leached zones are believed to be orders of magnitude higher than the average matrix permeability.Oil is relatively light (40° API). The two fields produce from around 350 active wells, over 90% of which are horizontal wells. One of the two fields has a strong aquifer, whereas the other field has a major waterflood, with some 130 active water injection wells. Both fields produce at a high watercut of around 90%. All the producers are completed with either a gaslift or electrical submersible pump artificial lift system. In these fields, minimising the decline by restoring and optimising production is a major effort. Every year typically 250 major well entries are executed by a Workover Unit or a Coiled Tubing Unit. The major interventions are focussed on Restoring integrity: The wells are typically some 20–30 years old and exhibit integrity problems.Replace failed ESPsOptimise the inflow profile, by adding perforations or water shut-offs, in order to improve reservoir sweep.Stimulations to remove damage to inflow and outflow of wells.Well conversions from producer to injector or from gaslift to ESP. The high number of major well entries has an associated high opex cost. In order to reduce unit opex costs, focus has been given to improve the efficiency of well interventions. This paper describes the improvements that were done to reduce the costs of the major well interventions, while at the same time improving the production from these interventions. Improvements These improvements come from the following elements:Selection of jobs to be executedESP managementManagement of the workover unitsApply ‘Service-the-Limit’ techniquesUse of new technology, specificallyOne rig-up CT systemUse of diverting agents for stimulations

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Eliminating Multiple Interventions Using a Single Rig-Up Coiled-Tubing Solution

Cited by 3 publications

References 0 publications

Conducting Polymers Films Deposited on Carbon Steel and Their Interaction with Crude Oil

Conducting Polymers Films Deposited on Carbon Steel and Their Interaction with Crude Oil

Minimize Risk and Improve Efficiency Associated With Electric Coiled Tubing Perforating Operations

Case History of Cost Reduction Optimization Efforts in a Mature Field

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