Whole-process leakage-plugging and well-cementing design method for high-temperature and high-pressure ultra-deep well
A high-temperature, high-pressure, ultra-deep well technology, applied in wellbore/well components, design optimization/simulation, calculation, etc., can solve problems such as leakage, adverse effects of cementing operations, etc.
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[0081] Embodiments of the present invention will be described in detail below in conjunction with examples.
[0082] Taking the 206.38mm liner cementing of a gas well as an example, the construction parameters of plug flow cementing are calculated:
[0083] A. According to the circulation displacement of 16L / s during well drilling, the formation pressure bearing capacity is calculated to be 7.45MPa;
[0084] B. According to the pressure bearing capacity, drilling fluid performance and liner string structure calculated in step A, the maximum liner string lowering speed is calculated to be no more than 0.195m / s, and the liner string is lowered according to the calculated speed;
[0085] C. After running the casing, calculate the circulating displacement of 14L / s according to the pressure bearing capacity, drilling fluid performance and annular space calculated in step A, and circulate the drilling fluid according to the calculated displacement;
[0086] D. Calculate the plug fl...
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