Flexible leak-stopping agent, and preparation method and application thereof
A plugging agent and flexible technology, applied in the field of plugging agent and its preparation, can solve the problems of easy breakage, long construction time, easy plugging failure, etc., achieve good fluidity and stability, high interface bonding strength, improve The effect of the construction period
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Embodiment 1
[0069] Embodiment 1: Preparation of flexible plugging agent raw materials
[0070] 1. Preparation of structure forming agent
[0071] example 1)
[0072] Take 100g of acrylic acid, add it to a three-necked flask, add 200g of water, stir, add 40g of magnesium oxide, and react at 50°C for 2 hours to obtain a transparent viscous liquid;
[0073] Take 150g of the synthesized polymer, add 0.1g ammonium persulfate (catalyst), add 0.03g N, N dimethylacrylamide (coupling agent), and prepare a homogeneous liquid to obtain a structure forming agent named J-1, Store at low temperature.
[0074] Example (2)
[0075] Take 100g of acrylic acid, add it to a three-necked flask, add 200g of water, stir, add 56g of calcium oxide, and react at 50°C for 2 hours to obtain a transparent viscous liquid;
[0076] Get 150g of synthesized polymer, add 0.3g of ammonium persulfate (catalyst), add 0.05g of N, N dimethylacrylamide (coupling agent), and prepare a homogeneous liquid to obtain a structure...
Embodiment 2
[0087] Embodiment 2: the preparation of flexible plugging agent
[0088] example 1)
[0089] Take 40g of the structure-forming agent J-1 prepared in Example 1, add 55g of water, stir evenly, then add 30g of active nano-reinforcing agent, stir evenly, then add 70g of active nanomaterials, stir evenly, and then add gelling solidification 2g of agent, 3g of organic macromolecular polymer, 0.5g of temperature regulating agent, and stir evenly to prepare a flexible plugging agent with a total weight of 200g.
[0090] Example (2)
[0091] Take 40g of the structure-forming agent J-2 prepared in Example 1, add 55g of water, stir evenly, then add 30g of active nano-reinforcing agent, stir evenly, then add 70g of active nanomaterials, stir evenly, and then add gelling solidification 2g of agent, 3g of organic macromolecular polymer, 0.5g of temperature regulating agent, and stir evenly to prepare a flexible plugging agent with a total weight of 200g.
Embodiment 3
[0092] Embodiment 3: the application of flexible plugging agent
[0093] construction technology
[0094] Use expandable packers, pull-out packers and other supporting tools to perform full-hole leak detection on oil wells to determine the exact location of casing damage and the exact location of the perforation section.
[0095] (1) According to the specific conditions of the construction well, formulate the slurry mix plan to adapt to the construction wells with different oil well water flooding, water channeling, bottom water coning, leakage degree, different well temperature and different leakage characteristics.
[0096] (2) According to the difficulty and depth of construction, select the construction methods such as full-hole horizontal pushing of the empty wellbore, plugging of the lower string and plugging of the lower packer string.
[0097] (3) Dynamically adjust various construction parameters during on-site construction.
[0098] Construction Performance Researc...
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