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Method for controlled placement of oilfield chemicals and composition useful for practicing same
Method for controlled placement of oilfield chemicals and composition useful for practicing same
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机译:油田化学品的受控放置方法及其用于实践的组合物
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摘要
Disclosed is a method for introducing additives into an oil, gas, or water injection well or pipeline in solid form at a location other than at the bottom. The method is practiced using pellets having a density sufficient to suspend the pellet at a top phase, bottom phase or at the interface of two phases of fluid within a wellbore. The pellets are prepared from a pellet matrix, such as an ethoxylated wax, and a weighting agent as well as an additive. By varying the amount of weighting agent, the density of the pellet can be varied to suspend it at a desired point to for a time sufficient to deliver the additive to the desired point within the wellbore.
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