| 摘要 |
Aphron-containing oil based well drilling and servicing fluids are disclosed which seal microfractutres and the like during drilling and well servicing operations, thus decreasing the volume of fluid lost to t he formations contacted by the fluids. The fluids comprise an oleaginous liquid as the continuous phase, a viscosifier which imparts a low shear rate viscosity to the fluids of at least 10,000 centipoise, an aphron-generating surfactant, and aphrons. The fluids are used in a conventional method of drilling an oil and/or gas well or in conventional methods of servicing or treating such wells, such as in completion, workover , sand control, and frac pack operations, and as spotting fluids to released stuck pipes or tools in a wellbore.
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