Solid free scale-preventing workover fluid suitable for sodium bicarbonate formation water
A sodium bicarbonate and workover fluid technology, applied in the direction of drilling compositions, chemical instruments and methods, can solve the problems of high preparation cost and high density, and achieve the effects of good fluidity, low corrosion and low cost
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Embodiment 1
[0038] Embodiment 1 (the following percentages are mass percentages)
[0039] Raw materials (both are commercially available products): 56% of liquid calcium, 2% of glacial acetic acid, 2% of quaternized imidazoline, and the balance is fresh water. The above raw materials are uniformly mixed to prepare a solid-phase scale-inhibiting type workover fluid. The workover fluid is a pale yellow free-flowing liquid with extremely low dynamic viscosity, within 10mPa.s, pH value of about 4, and a density of 1.20g / cm measured by a Pomerol density meter. 3 . Take 200mL of the workover fluid, put it in a 400mL Erlenmeyer flask with a stopper, and place two consecutively under the conditions of normal temperature and pressure, medium temperature (90°C) normal pressure and high temperature and high pressure (190-195°C, 16-17MPa) respectively. In one month, the liquid in the bottle has no precipitation and is as clear as ever. It shows that the compatibility of the workover fluid system i...
Embodiment 2
[0041] Raw materials (both are commercially available products): liquid calcium 97%, glacial acetic acid 1.4%, quaternized imidazoline 1.6%, no fresh water added. The above raw materials are uniformly mixed to prepare a solid-phase scale-inhibiting type workover fluid. The workover fluid is a light yellow free-flowing liquid with extremely low dynamic viscosity, within 10mPa.s, pH value of about 6, and a density of 1.40g / cm measured by a Pomerol density meter. 3 . Take 200mL of the workover fluid, put it in a 400mL Erlenmeyer flask with a stopper, and place two consecutively under the conditions of normal temperature and pressure, medium temperature (90°C) normal pressure and high temperature and high pressure (190-195°C, 16-17MPa) respectively. In one month, the liquid in the bottle has no precipitation and is as clear as ever. It shows that the compatibility of the workover fluid system is good. The workover fluid was mixed evenly with the formation water of Ban 5-3 well ...
Embodiment 3
[0043] Raw materials (both are commercially available products): 85% liquid calcium, 12% zinc chloride, 1.2% glacial acetic acid, 1.8% quaternized imidazoline, without adding fresh water. The above raw materials are uniformly mixed to prepare a solid-phase scale-inhibiting type workover fluid. The workover fluid is a light yellow free-flowing liquid with extremely low dynamic viscosity within 10mPa.s and a pH value of about 5. The density measured by Pomerol density meter is 1.55g / cm 3. Take 200mL of the workover fluid, put it in a 400mL Erlenmeyer flask with a stopper, and place two consecutively under the conditions of normal temperature and pressure, medium temperature (90°C) normal pressure and high temperature and high pressure (190-195°C, 16-17MPa) respectively. In one month, the liquid in the bottle has no precipitation and is as clear as ever. It shows that the compatibility of the workover fluid system is good. The workover fluid was mixed evenly with the formation...
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