Lipophilic rheology modifier and its application in <scp>oil‐based</scp> drilling fluids

Zhou, Yan; Pu, Xiaolin

doi:10.1002/app.51502

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…By studying the static stability of reversible emulsion obtained by changing the amount of alkali, the stability of reversible emulsion formed at each stage in the process of alkali conversion was characterized, and the changes of reversible emulsion at each stage in the process of reversible phase were analyzed. Since the change in the rheology of emulsions is closely related to the change in microstructure [31][32][33][34][35], the rheological properties of emulsions formed at each stage of the transition process were evaluated, verified with the microstructure changes of the emulsions observed by optical and electron microscopy, and identified as the related mechanism of the phase transformation of reversible emulsions with alkali (Table 1). The change of the macro-properties…”

Section: Resultsmentioning

confidence: 99%

Study on the Properties Changes of Reversible Invert Emulsion during the Process from O/W to W/O with Alkali

Liu,

Li,

et al. 2023

Molecules

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The reversible emulsion drilling fluid system combines the advantages of both oil-based and water-based drilling fluids, which can achieve ideal results in different stages of drilling and completion, and the system can be reused to effectively reduce costs. However, the research on reversible emulsions mainly focuses on the development of new reversible emulsifiers, while the specific phase transformation mechanism of reversible emulsion systems is still unclear. In this paper, a stable reversible emulsion was prepared using the reversible emulsifier DMOB as a raw material, and the reversible emulsion performance of the alkali response from the O/W emulsion phase to the W/O emulsion was studied. The microstructure of reversible emulsions was studied by a microscope, a cryogenic transmission electron microscopy, and a laser particle size analyzer. The changes in macroscopic properties of reversible emulsions in the process of alkali conversion were studied by pH, conductivity, demulsification voltage, static stability, viscosity, rheology, and other indicators, and the conversion mechanism of reversible emulsions from O/W emulsion ⟶ bicontinuous structure ⟶ O/W/O emulsion ⟶ W/O emulsion was clarified. The details are as follows: in the first stage, when the amount of NaOH ≤ 0.43 vol.%, the overall particle size of the emulsion decreases first and then increases with the increase in NaOH dosage. In the second stage, when the amount of NaOH was 0.45 vol.%, a double continuous structure was formed inside the emulsion. In the third stage, when the amount of NaOH is 0.48 vol.%, the O/W/O emulsion is formed, and with the increase in stirring time, the internal oil droplets gradually accumulate and are discharged from the water droplets, and finally, the W/O emulsion is formed. In the fourth stage, when the dosage of 0.50 vol.% ≤ NaOH ≤ 5.00 vol.%, the W/O emulsion was formed, and with the increase of NaOH dosage, the structure and compactness between water droplets increased first and then decreased. In the whole process, with the increase in the amount of NaOH solution, the total particle size of the emulsion first decreased and then increased.

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Section: Resultsmentioning

confidence: 99%

Study on the Properties Changes of Reversible Invert Emulsion during the Process from O/W to W/O with Alkali

Liu,

Li,

et al. 2023

Molecules

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“…Patel and Santra proposed an on-line measurement method and device for measuring drilling fluid density by infrared spectroscopy; however, its structure is complex, its precision is low, and its antiinterference ability is poor [14]. Zhou and Pu proposed a new method for real-time measurement of oil-based drilling fluid rheological properties by infrared spectroscopy; however, its sensor and spectral measurement device are easily affected by the harsh environment on site, and disturbance and temperature will increase its error [15]. Hongtao et al proposed a research method for the identification of two-component hydrocarbon concentrations in drilling fluids by laser Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

A study on the measurement method of a two-component fluid proportion infrared spectrum based on HDC-PSAM

Liang¹,

Luo²,

Guo³

et al. 2022

Meas. Sci. Technol.

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When traditional infrared spectroscopy technology measures and analyzes the quantitative research of fluid, due to the complex band composition of infrared spectrum, weak absorption intensity and spectral signal, it is easy to be disturbed during measurement and increase the error, making the quantitative analysis of fluid inaccurate and difficult to achieve requirements for accurate analysis of fluids. In order to solve this problem, this paper uses the self-developed experimental apparatus, and takes water-based drilling fluid and diesel oil as the research objects, and proposes a new method for quantitative research of two-component proportional fluids based on HDC-PSAM. A large number of experiments are carried out on water-based drilling fluids, diesel and water mixtures, and a large number of spectral experimental data are preprocessed using moving window smoothing and normalization methods. Extracting effective features with Hybrid dilated convolution (HDC) and Pyramid self-attention modules (PSAM) , combined with Partial Least Squares Algorithm (PLS) to model fluid mixtures to achieve quantification of fluid mixtures calculate. The experimental results show that this method can reduce the influence of disturbance during measurement, has higher accuracy and stability, and effectively improves the measurement accuracy of infrared spectroscopy for quantitative analysis of fluids. At the same time, this method provides a strong technical support for the analysis of other fluids and the measurement of fluid mixture by using infrared spectroscopy technology.

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