油气井除垢剂的性能优化与除垢机理
Performance Optimization and Mechanism of Descaling Agent for Oil and Gas Wells
刘婉 1孙涛 2吴红军 2张梁 2白晓飞 2张凌茜2
作者信息
- 1. 中国石油集团工程材料研究院有限公司,陕西西安 710077;西安德信成科技有限责任公司,陕西西安 710065
- 2. 中国石油塔里木油田分公司,新疆库尔勒 841000
- 折叠
摘要
垢堵问题是造成油气田减产的主要问题之一.目前常用的酸性解堵剂存在较强的腐蚀性,影响到油气井的安全生产.为了解决以上问题,采用Gaussian 09软件通过DFT优化分子结构计算了几种螯合剂的HOMO/LUMO能级和螯合剂与金属离子的结合能,优选了螯合剂二乙烯三胺五乙酸(DTPA);同时,采用计算化学对复合型除垢剂的除垢机理进行了深入探索,研究了不同助剂之间的协同作用;在理论研究基础上研发一种以DTPA为主剂的非酸性除垢剂体系:12%DTPA+0.3%阻垢剂PASP+0.4%渗透剂JFC.该配方对某现场垢样的溶垢率最高可达到80%以上,具有较好的溶垢效果.根据动力学模拟,验证了除垢剂体系对于碳酸钙的溶垢过程符合准二级动力学模型.
Abstract
The scale plugging problem is one of the main problems causing the production reduction of oil and gas fields.The common acid deplugging agent is highly corrosive,which affects the safe production of oil and gas wells.In order to solve the above problems,the HOMO/LUMO level and binding energy of chelating agents with metal ions were calculated by using Gaussian 09 software to optimize the molecular structure of several chelating agents.The chelating agent diethylenetriamine pentaacetic acid(DTPA)was selected.At the same time,computational chemistry was used to explore the mechanism of the compound detergent,and the synergistic effect between different additives was studied.On the basis of theoretical research,a non-acid scale removal agent system with DTPA as the main agents was developed:12%DTPA+0.3%scale inhibitor PASP+0.4%penetrant JFC.The scale dissolution rate of the system could reach more than 80%for a certain site scale sample,exhibiting good scale dissolving effect.According to the kinetic simulation,it was verified that the dissolving process of calcium carbonate by the descaling agent system conformed to the quasi-second-order kinetic model.
关键词
除垢/解堵/机理/动力学Key words
descaling/plugging removal/mechanism/dynamics引用本文复制引用
基金项目
陕西省创新人才推进计划青年科技新星项目(2022KJXX-108)
出版年
2024
NETL
NSTL
万方数据