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发明授权
CN106082807B 油（水）井封窜、堵漏体系制备及应用方法 有权

油（水）井封窜、堵漏体系制备及应用方法
摘要：
油（水）井封窜、堵漏体系制备及应用方法是油田化学领域，它弥补了油田油(水)井封窜堵漏、封层领域技术现状的不足，它由预堵体系和封堵体系两部分组成，封堵体系由以下原料组份组成：油井G级水泥40‑50%、超细矿渣粉15‑20%、可分散乳胶粉8‑15%、微硅粉8%、UEA‑H膨胀剂12%、聚丙烯酸纤维2%、USZ减阻剂0.2‑0.5%、GH‑1(或GH‑7)缓凝剂0.1‑1.5%；预堵体系有预堵体系1和预堵体系2两种类型；本发明体系配液简单，流变性、注入性好，体系成胶、固化时间可调可控，施工安全；适用于疏松亏空地层、裂缝性地层、以及缝、洞型灰岩地层等复杂地质条件下油（水）井封窜、堵漏、封层作业，也适合于钻进过程中大漏失返的堵漏。
摘要（英）：

A production and application method of an oil (water) well channeling and leakage plugging system belongs to the field of oilfield chemistry, and fills the gap in oil (water) well channeling and leakage plugging and layer sealing technologies. The oil (water) well channeling and leakage plugging system is composed of a pre-plugging system and a plugging system, and the plugging system comprises 40-50% of oil well G grade cement, 15-20% of ultrafine mineral slag powder, 8-15% of dispersible latex powder, 8% of silicon micro-powder, 12% of an UEA-H expanding agent, 2% of polyacrylic acid fibers, 0.2-0.5% of a USZ drag reducer and 0.1-1.5% of a GH-1 (or GH-7) retarder; and the pre-plugging system comprises a type 1 pre-plugging system and a type 2 pre-plugging system. The oil (water) well channeling and leakage plugging system has the advantages of simple liquid preparation, good rheological property and injectivity, adjustable and controllable glue formation and solidification time, and safety in construction, is suitable for oil (water) well channeling and leakage plugging and layer sealing of loose and depleted strata, crack strata, crack and cavity type limestone strata and other complex geologic conditions, and is also suitable for leakage plugging of large leaking return in the drilling process.

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