Aluminum-Based HPWBM Successfully Replaces Oil-Based Mud To Drill
Exploratory Well in the Magellan Strait, Argentina

Ramírez, Mario; Benaissa, Saddok; Ragnes, Gerald; Almaraz, Angel

doi:10.2523/108213-ms

Cited by 4 publications

(2 citation statements)

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“…The mechanism for this phenomenon is determined by the cloud point of the polyglycol, and involves plugging pore throats and microcracks with its particles, which retards pressure and filtrate transmission. In this test, sodium silicate exhibited the best ability to retard pressure transmission; silicates and aluminates have the highest efficiency in water-based drilling fluids [10].…”

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confidence: 99%

Multifunctional Properties of Polyglycol in Deepwater Drilling Fluids

Zhao

Qiu

Huang

et al. 2014

Chem Technol Fuels Oils

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We have experimentally investigated a number of properties of polyglycol in deepwater drilling fluids. Polyglycol retards pressure transmission from the fluid to the formation, and improves the shale cuttings recovery rate. Measurements of the electrokinetic potential (the zeta potential) and the clay particle size showed that the inhibiting effect of polyglycol involves adsorption on clay particles and plugging pores and cracks. Polyglycol inhibits gas hydrate formation, has good lubricity and low toxicity, and does not have a significant impact on the rheological properties of drilling fluids at low temperature.The deepwater environment makes additional demands on drilling fluid. The major challenges of deepwater drilling include instability of the unconsolidated formation, gas hydrate formation, problems ensuring the required rheological properties of the drilling fluids at low temperatures, stringent environmental requirements, etc. [1]. Polyglycols can effectively inhibit shales in deep water, and are widely used in water-based drilling fluids. Currently, the inhibiting properties of polyglycols have mainly been studied [2-4], even though polyglycols have other properties that are important for deepwater drilling. In this paper, we study a number of properties of the polyglycol SD-301, aimed at arguing for its use in deepwater drilling.Polyglycol SD-301 is a commercial product obtained by copolymerization of ethylene oxide and propylene oxide. The density of the polyglycol is 1020 kg/m 3 and its cloud point is 27°C-29°C. The shales used in this work, consisting mainly of clay minerals and quartz, were obtained from wells in the South China Sea.

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confidence: 99%

Multifunctional Properties of Polyglycol in Deepwater Drilling Fluids

Zhao

Qiu

Huang

et al. 2014

Chem Technol Fuels Oils

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“…However, these drilling fluids have many kinds of limitations in inhibiting shale swelling and hydration [5][6][7]. In recent years, a novel type of high performance water-based drilling fluid system is introduced which is mainly composed of organic amine shale hydration inhibitor, cationic polyacrylamide encapsulator, rheology modifier, and lubricant and filtration reducer.…”

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confidence: 99%

Properties Evaluation and Application of Organic Amine Inhibitor on the Properties of Drilling Fluids

Lv¹,

Zhong²,

Ren³

2014

TOPEJ

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An organic amine inhibitor was developed and evaluated. Experimental results showed that the organic amine inhibitor could decrease the surface tension to 50mN/m and had a little effect on the Zeta potential of clay. The inhibitor could effectively inhibit the dispersion of core and cuttings and had a lasting strong inhibition. The inhibitor had good compatibility with common drilling fluid, and it was useful to maintain drilling fluid stability under high temperature and could improve the filtration property of drilling fluid.

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Case Studies Validate the Effectiveness of Aluminum-based HPWBM in Stabilizing Micro-Fractured Shale Formations: Field Experience in the Peruvian Amazon

Arambulo¹,

Colque²,

Alban³

et al. 2015

SPE Annual Technical Conference and Exhibition

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One of the most important functions of drilling fluids is to maintain adequate wellbore stability until casing is run and cemented properly. Lack of wellbore stability generates an enlarged non-homogeneous elliptical weaker borehole. This non-cylindrical shape of the wellbore leads to complex drilling problems such as poor hole cleaning, high solids production, stuck pipe, unsuccessful wireline runs, poor cement bond representing large cost to operators. Micro-fractured shale formation represents a challenge due to its natural lack of stability when exposed to conventional water-based mud (WBM). As a solution, oil-based mud (OBM) becomes a technical option to overcome the issues observed with conventional WBM. It tremendously reduces the chemical interaction with micro-fractured shales. However, environmental constraints of the OBM makes this option non-applicable for environmentally sensitive areas. According to recent publications, with similar complicated environments, Aluminum-Based High-Performance Water-Based mud (HPWBM) has shown good performance with features closely comparable to that of OBM. The Peruvian Amazon has the largest Peruvian oil and gas reserves. However, it is located in an environmentally sensitive area marked by a large biodiversity and native communities. Environmental concerns related to drilling activity are very restrictive. Furthermore, most operations are performed as “offshore on land” (i.e., helicopter-transportable operation) where drilling fluid management cost strongly affects the final Well’s Authorization for Expenditure (AFE). Aluminum-based HPWBM has been successfully introduced recently in the Peruvian Amazon for drilling vertical and deviated wells resulting in considerable improvement in drilling performance and goal achievements. Issues related to shale instability were previously reported and financial losses forced operators to use Aluminum-Based HPWBM to reduce non-productive time and associated costs. Two groups of case studies from four wells drilled in Blocks 8, 56 and 88 blocks of the Peruvian jungle are presented in this paper. A Wellbore Quality Index (WQI) tool and Key Performance Indicators (KPI) are introduced to make comparison between aluminum-based HPWBM and previously used (i.e. conventional) fluid systems and to validate the effectiveness of the aluminum-based HPWBM system in stabilizing micro-fractured shale formations. A proper fluid design was selected during the planning phase of each project and fluid properties were monitored at the rig site to evaluate performance. In addition, wireline logging, casing runs, trips, wellbore quality and drilling performance were closely monitored to examine the impact of using aluminum-based HPWBM. Results show tremendous performance improvement introducing a new benchmark in drilling operation in the Peruvian Amazon.

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Aluminum-Based HPWBM Successfully Replaces Oil-Based Mud To Drill Exploratory Well in the Magellan Strait, Argentina

Cited by 4 publications

References 0 publications

Multifunctional Properties of Polyglycol in Deepwater Drilling Fluids

Multifunctional Properties of Polyglycol in Deepwater Drilling Fluids

Properties Evaluation and Application of Organic Amine Inhibitor on the Properties of Drilling Fluids

Case Studies Validate the Effectiveness of Aluminum-based HPWBM in Stabilizing Micro-Fractured Shale Formations: Field Experience in the Peruvian Amazon

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