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首页> 外文期刊>Journal of natural gas science and engineering >Stabilizing Asmari Formation interlayer shales using water-based mud containing biogenic silica oxide nanoparticles synthesized
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Stabilizing Asmari Formation interlayer shales using water-based mud containing biogenic silica oxide nanoparticles synthesized

机译：使用含有含有水基氧化物纳米粒子合成的水基泥浆稳定Asmari形成中间层子。

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One of the principal factors in Shale instability is the stress variation due to water invasion into Shale in waterbased drilling fluids, consequently causes in wellbore instability. This comprehensive study aims to improve the rheological properties and plug the nanometers Shale pore throat with biogenic silica oxide Nanoparticles. To do this, a new procedure of waste product from an agricultural industrial named Rice husks (RHs), amorphous silica oxide (SiO2) Nanoparticles (NPs) with a purity of 97.7% synthesized. Amorphous biogenic silica Nanoparticles have unique properties that do not exist in their crystalline state due to extraction from natural materials. One of these properties is environmentally friendly than crystalline shape, which belongs to the first group of carcinogens for humans. The NPs characterization was performed by Field Emission Scanning Electron Microscope (FESEM), Energy-dispersive spectroscopy (EDS), X-Ray Fluorescence (XRF), Transmission electron microscopy (TEM). The utilization of synthesized NPs in the water-based drilling fluid at two concentrations of 3 and 5% w/v illustrated that the mud-based rheological properties such as viscosity and fluid loss were improved. Since then Pore Pressure Transmission (PPT) apparatus is applied to investigate the effect of the synthesized NPs to plug Shale pore throats. The PPT test results showed that 3% w/v of NPs block the pore throats of interlayer Shale of Asmari Formation and reduce the rate of fluid penetration in Shale is about 5.6%. Moreover, at the concentration of 5% w/v NPs, fluid invasion into Shale reduces up to 43.7% compared to base mud. Consequently, synthesized NPs from RHs could be used as an efficient method to improve the rheological properties of water-based muds and stabilize the Shale layer.
机译：水基钻井液中由于水侵入页岩而引起的应力变化是导致页岩不稳定的主要因素之一，从而导致井壁不稳定。这项综合研究旨在改善流变性能，并用生物硅氧化物纳米颗粒堵塞纳米页岩孔喉。为此，合成了一种新的农业工业废品处理方法，称为稻壳（RHs），即纯度为97.7%的无定形二氧化硅（SiO2）纳米颗粒（NPs）。由于从天然材料中提取，非晶态生物硅纳米颗粒具有结晶状态下不存在的独特性质。其中一种特性比晶体更环保，晶体属于人类第一类致癌物。通过场发射扫描电子显微镜（FESEM）、能量色散光谱（EDS）、X射线荧光（XRF）、透射电子显微镜（TEM）对NPs进行表征。在3%和5%w/v两种浓度的水基钻井液中使用合成的NPs表明，泥浆的粘度和失水率等流变特性得到了改善。此后，孔隙压力传输（PPT）装置被用于研究合成的NPs堵塞页岩孔隙喉道的效果。PPT测试结果表明，3%w/v的NPs堵塞了阿斯马利组层间页岩的孔喉，降低了页岩中的流体渗透率约5.6%。此外，在5%w/v NPs浓度下，与基础泥浆相比，流体侵入页岩的程度降低了43.7%。因此，由RHs合成的NPs可作为改善水基泥浆流变性能和稳定页岩层的有效方法。

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