Oxygen exposure of ultra-high salinity produced fluid induces salt-particle composite deposition and plugging risk

QI Hongyuan; WEI Xiaoxuan; AI Guosheng; WU Junlin; HAN Guoqiang; ZHANG Bo; ZHANG Xinqing; WANG Yulong

doi:10.11949/0438-1157.20261001

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Oxygen exposure of ultra-high salinity produced fluid induces salt-particle composite deposition and plugging risk

更新时间：2026-08-26

- Oxygen exposure of ultra-high salinity produced fluid induces salt-particle composite deposition and plugging risk
- CIESC Journal (2026)
- 作者机构：
  
  1.西安石油大学石油工程学院，陕西西安 710065
  2.西安石油大学陕西省油气田特种增产技术重点实验室，陕西西安 710065
  3.油气储运安全与节能陕西省高校工程研究中心，陕西西安 710065
  4.中国石油塔里木油田分公司，新疆库尔勒 841000
  5.中国石油天然气集团有限公司超深层复杂油气藏勘探开发技术研发中心，新疆库尔勒 841000
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20261001
  CLC： TE866
- Received：26 July 2026，
  
  Revised：2026-08-25，
  
  Accepted：26 August 2026，
- 稿件说明：
移动端阅览
QI Hongyuan, WEI Xiaoxuan, AI Guosheng, et al. Oxygen exposure of ultra-high salinity produced fluid induces salt-particle composite deposition and plugging risk[J/OL]. CIESC Journal, 2026.
DOI：

QI Hongyuan, WEI Xiaoxuan, AI Guosheng, et al. Oxygen exposure of ultra-high salinity produced fluid induces salt-particle composite deposition and plugging risk[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20261001.

摘要

针对塔里木油田某区块特高矿化度采出液在集输过程中易发

生管壁沉积并诱发堵塞风险的问题，开展原水水质分析、静态曝氧实验、动态曝氧沉积实验和沉积物物相与微观结构表征，研究曝氧条件下采出液盐 - 颗粒复合沉积行为及潜在堵塞风险。结果表明：该采出液矿化度为 295491.39 mg/L，Na⁺和 Cl⁻为主导离子，Ca

⁺浓度较高，表观 Zeta 电位接近零值，颗粒体系稳定性较弱。静态曝氧过程中，HCO

⁻由 160.18 mg/L 降至 21.85 mg/L，pH 由 5.78 升至 6.10，悬固含量由 160.20 mg/L 增至 316.67 mg/L，说明曝氧可促进碳酸盐平衡迁移、难溶盐沉淀生成及颗粒复合团聚。动态沉积实验表明，不同管材表面沉积强度差异明显，144 h 时钢骨架管沉积量最高，为 7855.78 g·m⁻

，柔性复合管最低，为 2879.63 g·m⁻

。综合表征结果表明，沉积物中存在NaCl相关晶相信号、硅质颗粒及其他颗粒性固相，并具有明显的多组分复合累积和内部非均质结构特征。综合认为，敞口空气暴露引起的水化学变化、颗粒失稳、盐分富集、难溶盐固相形成及管壁捕获共同影响盐 - 颗粒复合沉积过程，该过程可导致沉积物在管壁持续累积，并进一步增加现场管道堵塞的潜在风险。研究结果可为特高矿化度采出液集输系统的管材优选、控氧、控颗粒和防堵治理提供依据。

Abstract

Aiming at the problem that the ultra-high salinity produced liquid in a block of Tarim Oilfield is prone to wall deposition and blockage risk during the gathering and transportation process

the raw water quality analysis

static oxygen exposure experiment

dynamic oxygen exposure deposition experiment and sediment phase and microstructure characterization were carried out to study the salt-particle composite deposition behavior and potential blockage mechanism of produced liquid under oxygen exposure conditions. The results show that the salinity of the produced liquid is 295491.39 mg / L

Na⁺ and Cl⁻ are the dominant ions

the concentration of Ca

⁺

is high

the apparent Zeta potential is close to zero

and the stability of the particle system is weak. In the process of static oxygen exposure

HCO

⁻ ~ -decreased from 160.18 mg / L to 21.85 mg / L

pH increased from 5.78 to 6.10

and suspended solid content increased from 160.20 mg / L to 316.67 mg / L

indicating that oxygen exposure could promote the equilibrium migration of carbonate

the formation of insoluble salt precipitation and the composite agglomeration of particles. The dynamic deposition experiment showed that the deposition strength of different pipe surfaces was significantly different. The deposition amount of steel skeleton pipe was the highest at 144

which was 7855.78 g·m

-2

and that of flexible composite pipe was the lowest

which was 2879.63 g·m

-2

. The comprehensive characterization results show that there are NaCl-related crystal phase signals

siliceous particles and other granular solids in the sediments

and there are obvious multi-component composite accumulation and internal heterogeneous structural characteristics. It is concluded that the chemical changes of water

particle instability

salt enrichment

solid phase formation of insoluble salt and pipe wall capture caused by open air exposure jointly affect the salt-particle composite deposition process

which can lead to the continuous accumulation of sediments on the pipe wall and further increase the potential risk of on-site pipeline blockage. The research results can provide a basis for pipe optimization

oxygen control

particle control and anti-blocking treatment of ultra-high salinity produced liquid gathering and transportation system.

关键词

Keywords

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