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发明授权
CN104962263B 中深层油藏水平分支井化学封隔暂堵剂及堵水方法 有权

中深层油藏水平分支井化学封隔暂堵剂及堵水方法
摘要：
本发明提供了中深层油藏水平分支井化学封隔暂堵剂及堵水方法。以该中深层油藏水平分支井化学封隔暂堵剂总量为100wt％计，该化学封隔暂堵剂包括：6‑12wt％的丙烯酰胺、1.5‑6.4wt％的复合增稠剂、0.126‑0.272wt％的复合交联剂、0.01‑0.05wt％的偶氮二异丁酸二甲酯、0.01‑0.04wt％的过硫酸铵、0.01‑0.08wt％的木质素磺酸钠，0.01‑0.05wt％的葡萄糖酸钠、0.01‑0.05wt％的柠檬酸、0.01‑0.06wt％的乙二酸、0.01‑0.05％的三乙醇胺和余量的水。本发明还提供了采用上述化学封隔暂堵剂完成的中深层油藏水平分支井的堵水方法。本发明提供的中深层油藏水平分支井化学封隔暂堵剂及采用其完成的堵水方法，实现了中深层油藏筛管完井的水平分支井的分支分段堵水，解决了筛管完井的水平分支井分段堵水的难题。
摘要（英）：

The present invention provides a middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent and a water plugging method, wherein the middle-deep stratum oil reservoir horizontal multilateral well chemical packing temporary plugging agent comprises 6-12 wt% of acrylamide, 1.5-6.4 wt% of a composite thickeners, 0.126-0.272 wt% of a composite cross-linking agent, 0.01-0.05 wt% of dimethyl 2,2'-azobis(2-methylpropionate), 0.01-0.04 wt% of ammonium persulfate, 0.01-0.08 wt% of sodium lignosulfonate, 0.01-0.05 wt% of sodium gluconate, 0.01-0.05 wt% of citric acid, 0.01-0.06 wt% of ethanedioic acid, 0.01-0.05% of triethanolamine, and the balance of water. The present invention further provides the method using the chemical packing temporary plugging agent to complete the water plugging of the middle-deep stratum oil reservoir horizontal multilateral well. With the chemical packing temporary plugging agent and the water plugging method of the present invention, the multilateral sectional water plugging of the middle-deep stratum oil reservoir screen pipe completion horizontal multilateral well is achieved, and the difficult problem of the screen pipe completion horizontal multilateral well sectional water plugging is solved.

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