合水油田措施返排液回用技术研究与应用
Research and application of operation flowback water reuse technology in Heshui Oilfield
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- 引用格式:
-
侯浩,刘保录,郑建刚,张桓,张复.合水油田措施返排液回用技术研究与应用[J].天然气与石油,2025,43(4):129-138.doi:10.3969/j.issn.1006-5539.2025.04.018
HOU Hao, LIU Baolu, ZHENG Jiangang, ZHANG Huan, ZHANG Fu.Research and application of operation flowback water reuse technology in Heshui Oilfield[J].Natural Gas and Oil,2025,43(4):129-138.doi:10.3969/j.issn.1006-5539.2025.04.018
- DOI:
- 10.3969/j.issn.1006-5539.2025.04.018
- 作者:
- 侯浩 刘保录 郑建刚 张桓 张复
HOU Hao, LIU Baolu, ZHENG Jiangang, ZHANG Huan, ZHANG Fu
- 作者单位:
- 中国石油天然气股份有限公司长庆油田分公司第十二采油厂, 甘肃 庆阳 745400
No.12 Oil Production Plant of PetroChina Changqing Oilfield Company, Qingyang, Gansu, 745400, China
- 关键词:
- 措施返排液;低成本;少药剂;差异化;回用
Operation flowback water; Low cost; Minimal chemicals; Differentiation; Reuse
- 摘要:
- 针对合水油田返排液处理成本高、成分复杂的难题,提出“物理优先—化学精控”协同策略,开发了基于低成本、少药剂原则的差异化处理工艺。通过精准对标水质特征与回用标准,确立Ca2+、Mg2+、总铁、悬浮物、pH值及含油量为关键影响因素,采用重力沉降除油砂、酸碱返排液自中和除铁等技术,显著降低化学药剂用量。根据回用目标设计差异化工艺组合:回用于洗井液时,采用三级简易处理工艺;回用于再配压裂液时,实施五级精细处理工艺,实现返排液“分类处理—定向回用”。结果表明,处理后水质全面优于回用标准；再配胍胶压裂液性能显著提升,交联时间 20 s,60 ℃/170 s-1剪切黏度96 mPa·s,破胶时间≤3 h,储层伤害率12.1%,配伍性良好。现场应用累计处理返排液2 000 m3,单位药剂成本降低21%,为高复杂返排液资源化提供了创新解决方案。
To address the high cost and complex composition of flowback water treatment in the Heshui Oilfield, this study proposes a synergistic “physical-first, chemical-precision” strategy, developing a differentiated treatment process based on low-cost and minimal chemical principles. By precisely targeting water quality characteristics and reuse standards, key control indicators—calcium and magnesium ions, total iron, suspended solids, pH, and oil content—were established. Techniques such as gravity settling for oil and sand removal and acid-base flowback water self-neutralization for iron removal significantly reduced chemical usage. Tailored process combinations were designed based on reuse objectives: a three-stage simplified process for well-flushing fluid reuse and a five-stage refined process for fracturing fluid reformulation, achieving “classified treatment-targeted reuse”. Results show that treated water quality surpasses reuse standards; the prepared guar-based fracturing fluid exhibited enhanced performance, with a crosslinking time of 20 s, shear viscosity of 96 mPa·s at 60 ℃/170 s-1, gel-breaking time≤3 h, reservoir damage rate of 12.1%, and excellent compatibility. Field applications treated 2 000 m3 of flowback water, reducing unit chemical costs by 21% compared to traditional methods, providing an innovative solution for resource utilization of highly complex flowback water.
