耐溫抗鹽雙水相乳液聚合物合成研究

耐溫抗鹽雙水相乳液聚合物合成研究

葛紅江，雷齊玲

(中國石油大港油田公司，天津300280)

摘要：隨著各油田進入注水開發的中后期，對調堵劑出現了高強度封堵和具有一定抗高溫耐鹽的要求，目前常規解堵劑不能滿足這些要求。針對存在的問題，實驗合成了耐溫抗鹽水包水乳液聚合物。通過改變實驗組分，包括分散穩定劑濃度、無機鹽加量、反應溫度、單體加量、引發劑濃度，探討了合成耐溫抗鹽水包水乳液聚合物最佳組成配比，實驗結果顯示水包水乳液聚合物組成組分可調節窗口很小，需要精確控制各組分，否則得不到預期的產物。耐溫抗鹽乳液聚合合成影響因素分析和性能評價結果顯示：耐溫抗鹽乳液聚合物較常規聚合物具有更大的適用范圍和更好的耐溫性，其在110℃下的穩定性明顯好于常規聚丙烯酰胺，可用于低滲透地層、海上油田及套損井調剖堵水。

關鍵詞：高分子量；乳液；雙水相；聚合物；合成

中圖分類號：TE39

作者簡介：第一葛紅江(1971年生)，男，博士，教授級高級工程師，2000年畢業于西南石油大學，長期從事油田化學和油水井措施研究和現場應用工作。郵箱：ghjlny@126.com。

Heat-Resisting & Salt-Resisting Aqueous Two-Phase Emulsion Polymer Synthesis

Ge Hongjiang, Lei Qiling

(PetroChinaDagangOilfieldCompany,Tianjin300280,China)

Abstract:As all oilfields step into the mid-late development stage, the plugging agent is required to be of high intensity and certain heat-resisting and salt-resisting capacity. But the currently used conventional plugging agents cannot meet the requirement. For the existing problems, a kind of heat-resisting and salt-resisting water-in-water emulsion polymer was synthesized. Through changing the experimental components including the dispersion stabilizer concentration, the amount increase of inorganic salts, the reaction temperature, the amount increase of monomer, and the initiator concentration, the best composition ratio to composite the heat-resisting and salt-resisting water-in-water emulsion polymer was discussed. Experiment results showed that the adjustable space of water-in-water emulsion polymer composition was little, and the expected product could not be acquired unless all composition was precisely controlled. Factor analysis of heat-resisting and salt-resisting emulsion synthesis and performance evaluation showed that the heat-resisting and salt-resisting emulsion polymer had greater scope and better temperature resistance as compared to conventional one, whose stability under 110℃ was better than conventional polyacrylamide. It could be used for profile shutoff in low-permeability formations, offshore oilfields, and casing damaging wells.

Key words: high molecular; emulsion; aqueous two-phase; polymer; synthesis

常規聚合物凝膠調堵劑由聚合物干粉+交聯劑+水組成，這類調堵劑是全球用量最大的調堵劑類型。隨著各油田進入注水開發的中后期，出現了對調堵劑的新要求：

(1)常規干粉聚合物難以配制成濃度大于1%的溶液，因此也難以形成強度很高的凝膠。對于竄流嚴重的水竄通道難以形成高強度封堵。……