Green Enhanced Oil Recovery for Carbonate Reservoirs

Haq, Bashirul

doi:10.3390/polym13193269

Cited by 12 publications

(16 citation statements)

References 76 publications

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“…Xanthan helps to increase viscosity in drilling fluids due to its long branched structure and relatively weak hydrogen bonds of side groups [40]. Functional groups are represented by hydroxyl (-OH), carboxyl (-COH), carbonyl (C=O) and other groups, which give this polymer its thickening properties [6,41]. Xanthan helps to increase viscosity in drilling fluids due to its long branched structure and relatively weak hydrogen bonds of side groups [40].…”

Section: Investigations and Resultsmentioning

confidence: 99%

“…In order to improve the quality of drilling-in the formation, the solution must be designed to reduce the natural permeability of the productive interval slightly or not at all, in order to provide excellent borehole cleaning and to facilitate further development of the well [5,6]. In addition to being safe and economical to use, drilling-in solutions must be compatible with natural fluids to avoid salt deposition or emulsion formation [1,7].…”

Section: Introduction 1relevance Of the Workmentioning

confidence: 99%

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Development of a Weighted Barite-Free Formate Drilling Mud for Well Construction under Complicated Conditions

2021

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Construction of oil and gas wells at offshore fields often involves high formation pressure and the presence of swellable clay rocks in the section. In addition, productivity preservation is also an important aspect. For this purpose, it is necessary to reduce the solids content of the drilling mud. The purpose of this work is to develop, improve, and study compositions of weighted drilling muds with low content of solids, on the basis of organic salts of alkali metals and polymers for the construction of wells prone to rock swelling and/or cavings, as well as drilling fluids for drilling-in the formation. In order to achieve the set goal the following is required: Analysis of existing drilling muds of higher density for drilling wells in unstable rock intervals and for drilling in the productive formation; analysis of experience in using drilling systems on the formic acid salts base and substantiation of requirements for flushing fluids during well construction; development and investigation of drilling mud compositions on the formate base; and the evaluation of inhibiting effect of systems containing organic salts, polymer reagents, and calcium carbonate on clay samples. The developed drilling mud is characterized by a high inhibiting ability that allows minimized mud-weighting by the natural solid phase. This reduces the volume of prepared mud and facilitates the regulation of its properties by reducing the dispersion of drilled cuttings; it eliminates problems related to hydration and the swelling of active clay rocks; and stabilizes unstable argillites prone to caving. The low solids content, low filtration rates, and inhibitory nature of the mud allows high stability of the rheological properties of the mud, and preserves oil and gas reservoir productivity under conditions of elevated formation pressure.

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Section: Investigations and Resultsmentioning

confidence: 99%

Section: Introduction 1relevance Of the Workmentioning

confidence: 99%

Development of a Weighted Barite-Free Formate Drilling Mud for Well Construction under Complicated Conditions

2021

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“…Oil and gas companies have been attempting to improve oil recovery from mature reservoirs due to the increase in demand for fossil fuels and the reduction of unexplored hydrocarbon reservoirs in the world. , The exploration and exploitation of new reservoirs are riskier and costly compared with using enhanced oil recovery (EOR) methods. , There are primary, secondary, and tertiary methods for producing oil from oil reservoirs. During first two phases of oil extraction, only about 30–50% original oil in place (OOIP) of the crude oil can be produced depending on the characteristics of the reservoir. , Since only about 30–50% OOIP can be extracted from the reservoirs using the primary and secondary methods, tertiary (EOR) methods are given more attention. − There are several techniques for producing oil using the tertiary method, such as chemical injection, gas injection, thermal methods, and microbial methods .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insight into Nano-chemical Enhanced Oil Recovery from Carbonate Reservoirs Using Environmentally Friendly Nanomaterials

et al. 2022

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The use of nanoparticles (NPs) in enhanced oil recovery (EOR) processes is very effective in reducing the interfacial tension (IFT) and surface tension (ST) and altering the wettability of reservoir rocks. The main purpose of this study was to use the newly synthesized nanocomposites (KCl/SiO2/Xanthan NCs) in EOR applications. Several analytical techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) were applied to confirm the validity of the synthesized NCs. From the synthesized NCs, nanofluids were prepared at different concentrations of 100–2000 ppm and characterized using electrical conductivity, IFT, and ST measurements. From the obtained results, it can be observed that 1000 ppm is the optimal concentration of the synthesized NCs that had the best performance in EOR applications. The nanofluid with 1000 ppm KCl/SiO2/Xanthan NCs enabled reducing the IFT and ST from 33 and 70 to 29 and 40 mN/m, respectively. However, the contact angle was highly decreased under the influence of the same nanofluid to 41° and the oil recovery improved by an extra 17.05% OOIP. To sum up, KCl/SiO2/Xanthan NCs proved highly effective in altering the wettability of rocks from oil-wet to water-wet and increasing the cumulative oil production.

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“…The EOR technique entails the injection of chemicals not usually present in the reservoir after primary and secondary production. In contrast, green EOR (GEOR) uses environmentally friendly agents to enhance oil production [ 6 , 7 , 8 ]. However, not all reservoirs follow the exact chronological sequence in the same way as heavy oil reservoirs, where the tertiary process is usually applied as the second operation [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Modification of Xanthan Gum for a High-Temperature and High-Salinity Reservoir

et al. 2021

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Tertiary oil recovery, commonly known as enhanced oil recovery (EOR), is performed when secondary recovery is no longer economically viable. Polymer flooding is one of the EOR methods that improves the viscosity of injected water and boosts oil recovery. Xanthan gum is a relatively cheap biopolymer and is suitable for oil recovery at limited temperatures and salinities. This work aims to modify xanthan gum to improve its viscosity for high-temperature and high-salinity reservoirs. The xanthan gum was reacted with acrylic acid in the presence of a catalyst in order to form xanthan acrylate. The chemical structure of the xanthan acrylate was verified by FT-IR and NMR analysis. The discovery hybrid rheometer (DHR) confirmed that the viscosity of the modified xanthan gum was improved at elevated temperatures, which was reflected in the core flood experiment. Two core flooding experiments were conducted using six-inch sandstone core plugs and Arabian light crude oil. The first formulation—the xanthan gum with 3% NaCl solution—recovered 14% of the residual oil from the core. In contrast, the modified xanthan gum with 3% NaCl solution recovered about 19% of the residual oil, which was 5% higher than the original xanthan gum. The xanthan gum acrylate is therefore more effective at boosting tertiary oil recovery in the sandstone core.

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Green Enhanced Oil Recovery for Carbonate Reservoirs

Cited by 12 publications

References 76 publications

Development of a Weighted Barite-Free Formate Drilling Mud for Well Construction under Complicated Conditions

Development of a Weighted Barite-Free Formate Drilling Mud for Well Construction under Complicated Conditions

Insight into Nano-chemical Enhanced Oil Recovery from Carbonate Reservoirs Using Environmentally Friendly Nanomaterials

Modification of Xanthan Gum for a High-Temperature and High-Salinity Reservoir

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