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纳米微粒强化钻井液流变特性及过滤特性的实验研究
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纳米微粒强化钻井液流变特性及过滤特性的实验研究
Advances in Geo-Energy Research, 2018, 2(3): 228-236原文网址：http://www.astp-agr.com/index.php/Index/Index/detail?id=67
本文以水基膨润土钻井液作为参考，比较了含纯和聚合物处理(部分水解聚丙烯酰胺(PHPA)或黄原胶)粘土纳米粒钻井液的悬浮性能。此外，还测量和比较了所研究的各种钻井液的泥浆重量，塑性粘度，表观粘度，屈服点，初级和次级凝胶化性质，pH值和过滤性能。对每一种钻井液减少泥饼厚度及失水量等可抑制压差卡钻的性能进行了评价。在这种情况下，泥饼厚度是变化的，并且测量所得的钻井液的过滤性能可作为邻近渗透性地层的泥饼引起的潜在井直径减小的指标。
结果表明，纳米微粒能显著提高钻井液的流变性能和过滤性能。与参考样品相比，不加任何添加剂的纯粘土-纳米颗粒悬浮液，将失水量减少到42%左右，泥饼厚度减少到30%；经黄原胶处理的粘土-纳米颗粒钻井液具有良好的降滤失效果，减少了61%的流失量。纳米流体的存在也会导致泥饼厚度的减少，从而直接降低压差卡钻的风险。
Rheological and filtration characteristics of drilling fluids enhanced by nanoparticles with selected additives: an experimental study
Nima Mohamadian, Hamzeh Ghorbani, David Wood, Hosein Kalantar Hormozi
(Published: 2018-05-20)
CorrespondingAuthor and Email: David Wood, dw@dwasolutions.com
Citation: Mohamadian, N., Ghorbani, H., Wood, D., Hormozi, H.K. Rheological and filtration characteristics of drilling fluids enhanced by nanoparticles with selected additives: an experimental study. Advances in Geo-Energy Research, 2018, 2(3): 228-236, doi: 10.26804/ager.2018.03.01.
ArticleType: Original article
Abstract：
The suspension properties of drilling fluids containing pure and polymer-treated (partially-hydrolyzed polyacrylamide (PHPA) or Xanthan gum) clay nanoparticles are compared with those of a conventional water-and-bentonite-based drilling fluid, used as the referencesample. Additionally, the mud weight, plastic viscosity, apparent viscosity, yield point, primary and secondary gelatinization properties, pH, and filtration properties of the various drilling fluids studied are also measured and compared. The performance of each drilling fluid type is evaluated with respect in terms of its ability to reduce mud cake thickness and fluid loss thereby inhibiting differential-pipe-sticking. For that scenario, the mud-cake thickness is varied, and the filtration properties of the drilling fluids are measured as an indicator of potential well-diameter reduction, caused by mud cake, adjacent to permeable formations.
The novel results show that nanoparticles do significantly enhance the rheological and filtration characteristics of drilling fluids. A pure-clay-nanoparticle suspension, without any additives, reduced fluid loss to about 42% and reduced mud cake thickness to 30% compared to the reference sample. The xanthan-gum-treated-clay-nanoparticle drilling fluid showed good fluid loss control and reduced fluid loss by 61% compared to the reference sample. The presence of nanofluids also leads to reduced mud-cake thicknesses, directly mitigating the risks of differential pipe sticking.
Keywords: Clay nanoparticles, xanthan, drilling fluid loss control, rheology, drilling mud filtration.
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