Scholarlink

<p>Well completion operations involve critical post-drilling processes to enable hydrocarbon extraction, where the selection of completion fluids—such as packer, workover, or fracturing fluids—plays a pivotal role in operational success. In Iran’s oil industry, high-temperature, high-pressure reservoirs necessitate high-density brines like calcium bromide. Reservoirs exceeding 300&#xa0;°F and 10,000 psi (HPHT conditions) typically require completion fluids with densities above 100 lb/ft<sup>3</sup>. However, economic constraints and limited domestic bromine resources render such fluids prohibitively expensive, while locally available brines often lack essential completion fluid properties. This study addresses these challenges by synthesizing cost-effective, potassium-based brines using domestically sourced salts and alcohols to enhance density and performance. By incorporating alcohols (40% vol.), the crystallization temperature of medium-density brines was significantly reduced, enabling higher salt dissolution and achieving densities of 93.4, 97.8, 99.2, and 99.4 lb/ft<sup>3</sup>. Alcohol-free variants (93.4 and 97.8 lb/ft<sup>3</sup>) and alcohol-enhanced formulations (99.2 and 99.4 lb/ft<sup>3</sup>) demonstrated alkaline pH stability, low viscosity (Viscosity below 70 cP for pumping downhole using available pumps in Iran), minimal clay swelling (&lt; 5 mL/2&#xa0;g bentonite), and near-zero corrosion rates, even at 300&#xa0;°F. Notably, exposure to reservoir rock altered wettability from oil-wet to water-wet, enhancing hydrocarbon recovery. Economically, these fluids leverage Iran’s accessible raw materials, offering a 40% cost reduction compared to calcium bromide. Designed primarily as packer fluids, they ensure well integrity under high reservoir pressures while mitigating formation damage. This research presents a scalable, sustainable solution for Iran’s oil sector, balancing technical efficacy with economic viability in challenging downhole environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental study on property enhancement of potassium Brines with alcohol additives for well completion applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月2日

查看全文
  • Ali Naghipour,
  • Ehsan Khamehchi,
  • Javad Mahdavi Kalatehno,
  • Alireza Kazemi

摘要

Well completion operations involve critical post-drilling processes to enable hydrocarbon extraction, where the selection of completion fluids—such as packer, workover, or fracturing fluids—plays a pivotal role in operational success. In Iran’s oil industry, high-temperature, high-pressure reservoirs necessitate high-density brines like calcium bromide. Reservoirs exceeding 300 °F and 10,000 psi (HPHT conditions) typically require completion fluids with densities above 100 lb/ft3. However, economic constraints and limited domestic bromine resources render such fluids prohibitively expensive, while locally available brines often lack essential completion fluid properties. This study addresses these challenges by synthesizing cost-effective, potassium-based brines using domestically sourced salts and alcohols to enhance density and performance. By incorporating alcohols (40% vol.), the crystallization temperature of medium-density brines was significantly reduced, enabling higher salt dissolution and achieving densities of 93.4, 97.8, 99.2, and 99.4 lb/ft3. Alcohol-free variants (93.4 and 97.8 lb/ft3) and alcohol-enhanced formulations (99.2 and 99.4 lb/ft3) demonstrated alkaline pH stability, low viscosity (Viscosity below 70 cP for pumping downhole using available pumps in Iran), minimal clay swelling (< 5 mL/2 g bentonite), and near-zero corrosion rates, even at 300 °F. Notably, exposure to reservoir rock altered wettability from oil-wet to water-wet, enhancing hydrocarbon recovery. Economically, these fluids leverage Iran’s accessible raw materials, offering a 40% cost reduction compared to calcium bromide. Designed primarily as packer fluids, they ensure well integrity under high reservoir pressures while mitigating formation damage. This research presents a scalable, sustainable solution for Iran’s oil sector, balancing technical efficacy with economic viability in challenging downhole environments.