Low-solid oil-soluble temporary blocking workover fluid and preparation method and application thereof
An oil-soluble temporary plugging agent and workover fluid technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as workover fluid loss, reservoir damage, and small reservoir damage, and achieve strong anti-corrosion Excellent temperature and pressure resistance, good temporary blocking and shielding ability, and excellent anti-blocking and blocking removal effect
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Embodiment 1
[0038] The raw materials and corresponding mass fractions of the low-solid oil-soluble temporary plugging type workover fluid in this embodiment are as follows:
[0039] Clay stabilizer: 0.006%;
[0040] Drainage aid: 0.00006%;
[0041] Iron ion stabilizer: 0.00006%;
[0042] Viscosifying fluid loss reducer: 0.008%;
[0043] Oil-soluble temporary plugging agent: 0.025%;
[0044] Dispersant: 0.00020%;
[0045] The balance is water.
[0046] The preparation process is as follows:
[0047] Take 500mL of water at room temperature, the specifically selected water is purified formation water, first add clay stabilizer and iron ion stabilizer to the selected water according to the above ratio, stir evenly, then add viscosity increasing fluid loss reducer, dispersant, fully dissolve Finally, add an oil-soluble temporary plugging agent, stir quickly to make it evenly dispersed, and finally add a drainage aid to prepare a low-solid oil-soluble temporary plugging type workover flui...
Embodiment 2
[0065] The raw materials and corresponding mass fractions of the low-solid oil-soluble temporary plugging type workover fluid in this embodiment are as follows:
[0066] Clay stabilizer: 0.008%;
[0067] Drainage aid: 0.00007%;
[0068] Iron ion stabilizer: 0.00008%;
[0069] Viscosifying fluid loss reducer: 0.009%;
[0070] Oil-soluble temporary plugging agent: 0.03%;
[0071] Dispersant: 0.00025%;
[0072] The balance is water.
[0073] The preparation process is as follows:
[0074]Take purified formation water at room temperature, add clay stabilizer and iron ion stabilizer to the selected water according to the above ratio, stir evenly, then add viscosity increasing fluid loss reducer and dispersant, after fully dissolved, add oil-soluble temporary plugging agent , stir quickly to make it evenly dispersed, and finally add a drainage aid to prepare a low-solid oil-soluble temporary plugging workover fluid.
[0075] In this embodiment, the clay stabilizer is dodecylt...
Embodiment 3
[0089] The raw materials and corresponding mass fractions of the low-solid oil-soluble temporary plugging type workover fluid in this embodiment are as follows:
[0090] Clay stabilizer: 0.01%;
[0091] Drainage aid: 0.0001%;
[0092] Iron ion stabilizer: 0.0001%;
[0093] Viscosifying fluid loss reducer: 0.01%;
[0094] Oil-soluble temporary plugging agent: 0.036%;
[0095] Dispersant: 0.00035%;
[0096] The balance is water.
[0097] The preparation process is as follows:
[0098] Take purified formation water at room temperature, add clay stabilizer and iron ion stabilizer to the selected water according to the above ratio, stir evenly, then add viscosity-increasing fluid loss reducer and dispersant, after fully dissolved, add oil-soluble temporary plugging agent , stir quickly to make it evenly dispersed, and finally add a drainage aid to prepare a low-solid oil-soluble temporary plugging workover fluid.
[0099] In this embodiment, the clay stabilizer is dodecyltri...
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Abstract
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