Water-based drilling fluid with palygorskite: cutting carrying and contaminants

IF 1.1 4区地球科学 Q4 CHEMISTRY, PHYSICAL

Clay Minerals Pub Date : 2023-08-11 DOI:10.1180/clm.2023.15

V. C. Santanna, Gabriela Carlos Nunes Araújo, Maria Thayse Andrade da Silva, T. N. C. Castro Dantas, Patrícia Mendonça Pimentel

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Abstract

In the petroleum industry, one of the most important functions fluids must perform is to carry cuttings efficiently. In this context, the contamination of drilling fluids represents a challenge to the industry because it alters the properties of these fluids. This work compares two drilling fluids (one palygorskite-based and the other polymer-based), evaluating the effects of contaminants on these drilling fluids and their ability to carry cuttings. A contaminant is considered to be any material that causes undesirable changes in the properties of the drilling fluid. Contamination of an aqueous drilling fluid by calcium hydroxide (Ca(OH)2) and brine can increase the filtrate volume, decrease the perforation rate and alter the rheological properties of the fluid. This work analyses the effects of contamination by Ca(OH)2 and brine on the properties of salted water-based drilling fluids viscosified with palygorskite. For comparison, tests were performed with a polymeric drilling fluid. The cutting-carrying capacity of these fluids was verified using the empirical correlations of Moore (1974), Chien (1994) and Walker & Mayes (1975). The results show that the drilling fluid with palygorskite is resistant to contamination with Ca(OH)2 and brine, presenting low filtrate volume values. The drilling fluid with palygorskite presented greater slip velocities than the polymeric drilling fluid. Regarding the cutting-carrying capacity, the drilling fluid with palygorskite presented positive transport ratio values (>0), making it suitable for carrying rock cuttings. However, the polymeric drilling fluid showed better performance in terms of cutting-carrying capacity.

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含坡缕石的水基钻井液:切割携带物和污染物

在石油工业中，流体必须发挥的最重要的功能之一是有效地携带岩屑。在这种情况下，钻井液的污染对行业来说是一个挑战，因为它会改变这些钻井液的性质。这项工作比较了两种钻井液（一种是坡缕石基钻井液，另一种是聚合物基钻井液），评估了污染物对这些钻井液的影响及其携带岩屑的能力。污染物被认为是导致钻井液性质发生不希望的变化的任何材料。氢氧化钙（Ca（OH）2）和盐水对含水钻井液的污染可增加滤液体积、降低射孔率并改变流体的流变特性。分析了Ca（OH）2和盐水污染对坡缕石增稠盐水基钻井液性能的影响。为了进行比较，使用聚合物钻井液进行了测试。使用Moore（1974）、Chien（1994）和Walker&Mayes（1975）的经验相关性验证了这些流体的切削承载能力。结果表明，坡缕石钻井液不易受Ca（OH）2和盐水的污染，滤液体积值较低。坡缕石钻井液比聚合物钻井液具有更大的滑动速度。在岩屑携载能力方面，坡缕石钻井液呈现出正的输送比值（>0），适合携载岩屑。然而，聚合物钻井液在切削承载能力方面表现出更好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clay Minerals 地学-矿物学

CiteScore

3.00

自引率

20.00%

发文量

审稿时长

6 months

期刊介绍： Clay Minerals is an international journal of mineral sciences, published four times a year, including research papers about clays, clay minerals and related materials, natural or synthetic. The journal includes papers on Earth processes soil science, geology/mineralogy, chemistry/material science, colloid/surface science, applied science and technology and health/ environment topics. The journal has an international editorial board with members from fifteen countries.