Investigation and remediation of active-clay contaminated sepiolite drilling muds

Altun, Gürşat; Osgouei, Ali Ettehadi

doi:10.1016/j.clay.2014.10.002

Cited by 19 publications

(8 citation statements)

References 3 publications

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“…The raw sepiolite clay (commercial product identified as Turk Taciri Bej) was obtained from AEM Company (AEM 2014) in Eskisehir / Turkey. Several studies have shown that sepiolite clay, which is a thermally stable viscosifier, can be used under harsh drilling conditions due to its essential properties such as providing sufficient rheological properties, exhibiting less gelation tendency, and reducing fluid loss when used with some suitable additives (Carney and Meyer 1976;U Serpen, Haciislamoglu, and Tuna 1992;Serpen 2005, Altun andOsgouei, 2014). Additionally, commercial Wyoming bentonite clay (QUIK-GEL) supplied by Baroid Company was used as the primary additive for bentonite/polymer drilling fluid.…”

Section: Methodsmentioning

confidence: 99%

Su Bazlı Sondaj Sıvılarının Termal Döngü Testine Dayalı Termal Stabilitesi

Ettehadi¹

2021

European Journal of Science and Technology

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Thermal stability of water-based drilling fluids is an essential factor especially through drilling geothermal and deep oil and gas wells. The chemical and physical properties of a drilling fluid system are substantially affected by high temperature and consequently lead to excessive gelation and formation damage issues. As a result of high temperature, formation damage might result from high fluid losses and reaction with formation fluid salts and hydroxides. This study is an attempt to investigate the thermal stability of clay base drilling fluids using thermal cycle testing. This test is a part of stability testing that allows determining if a fluid system remains stable under various conditions. This type of test can be applied to the drilling fluid systems and puts the sample through a series of extreme and rapid temperature change encountering in during fluid circulation in a geothermal well. Less toxicity as well as commercial and economical availability of clays make them an inevitable component for drilling fluid systems. A type of sepiolite clay taken from Eskisehir in Turkey and Wyoming bentonite as the API reference clay were considered to prepare freshwater weighted, unweighted, and solid contaminated fluid systems. API recommended and oscillation amplitude sweep tests were firstly carried out to evaluate the mechanical stability of selected fluid systems. The samples were then subjected to five thermal cycles from 25° C to 150° C. The relative change of the viscosity value compared to the value at the start of the thermal cycles was used as a measure of the structural changes in the fluid systems. The sample that shows a small value for the relative structural change at the end of the thermal cycles has the lowest decrease in the viscosity and hence the highest thermal stability. Discovery Hybrid Rheometer (DHR-II) was used to apply the oscillation and thermal cycle testing. Results revealed that sepiolite based muds formulated in this study tolerate stability problems resulted from high and rapid temperature variation. Obtained appropriate thermal rheological properties as well as thermal cycle test results were strong indicators for the effectiveness of sepiolite muds. This study can help the oil and geothermal industry to be more familiar with a high-temperature stable sepiolite clay to prepare high-performance drilling fluids.

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Section: Methodsmentioning

confidence: 99%

Su Bazlı Sondaj Sıvılarının Termal Döngü Testine Dayalı Termal Stabilitesi

Ettehadi¹

2021

European Journal of Science and Technology

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“…In this work, the kinetic data of MB sorption were temptatively adjusted to a three-parameter exponential function, as shown in Eq. (2) [9]: (2) where Q e is the fixed quantity of MB per gram of adsorbent at sorption equilibrium, in mol g −1 , k is the kinetic constant (min -1 ) and n is another constant, which is related to the MB sorption mechanism changes. A convenient linearized form of this equation is shown in Eq.…”

Section: Kinetic Features Of Sorption Of Mb On the Membranous Adsorbentmentioning

confidence: 99%

“…In oil well industry, some dye powders and optical brighteners are used to find breaks at mud/cement interfaces. Specifically, methylene blue (MB) has extensively used to indicate some features of subsurface reactive clays present in drilling fluids of oil wells [2]. On the other hand, wastewaters containing dyes from oil industry procedures have been a major source of concerns, due to their intrinsic potential of aquatic environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

The interaction of a naturally occurring membranous collagen with high-saline dye solutions – mechanistic features from unusual multi-step biosorption

et al. 2018

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It is known that wastewaters containing dyes are very difficult to treat, since many dyes are stable and recalcitrant molecules. In this way, sorption may suitable for effectively remove dyes in this specific application field. In this work, a first approach for using polymeric membranous collagen of fish scales for sorption of saline methylene blue dye (MB) solution found in subsurface procedures of oil well industry. From structural characterization, the sorbent was found to be a composite of fibrillar type I collagen and apatites. The MB sorption amounts decreased with temperature increasing, with maximum MB sorbed of 2.18 mmol g-1 at 25 0 C. In most sorption tests, residual MB in saline water was undetectable within 200 min of contact time. The sorption kinetic data were well adjusted to a three-parameter multi-step exponential function. The good fitting of such function were only obtained taking into account the presence of time-dependent kinetic parameters. The proposed multistep sorption mechanism involved surface interaction and diffusion of MB into the membranous collagen. The interaction of positively charged MB ions with the collagenous adsorbent occurred through electrostatic forces. The results point out the collagenous adsorbent for effective procedures of sorption of MB dyes from high-saline wastewaters.

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“…Recent studies revealed that the filtration properties of SP mud could economically be controlled based on the addition of commercial additives . In more recent study, Altun et al reported that SP drilling muds formulated in a certain mixing order of additives provided effective rheological properties and water loss.…”

Section: Introductionmentioning

confidence: 99%

Effects of nano‐sepiolite on rheological properties and filtration loss of water‐based drilling fluids

Abdo

Al-Sharji²,

Hassan

2016

Surface & Interface Analysis

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a This work deals with the synthesis of nano-sepiolite (NSP) and its evaluations as potential drilling fluids (DF) additive for improvement of DF rheological properties and filtration loss. Results show that addition of NSP to the base drilling fluids stabilized its rheological properties (plastic viscosity and yield point) and improved its gel strength at normal and increased temperature and pressure. The effect of NSP on fluid loss was also investigated, and results show that NSP stabilized and improved fluid loss for both normal and high pressure and temperature conditions.

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Investigation and remediation of active-clay contaminated sepiolite drilling muds

Cited by 19 publications

References 3 publications

Su Bazlı Sondaj Sıvılarının Termal Döngü Testine Dayalı Termal Stabilitesi

Su Bazlı Sondaj Sıvılarının Termal Döngü Testine Dayalı Termal Stabilitesi

The interaction of a naturally occurring membranous collagen with high-saline dye solutions – mechanistic features from unusual multi-step biosorption

Effects of nano‐sepiolite on rheological properties and filtration loss of water‐based drilling fluids

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