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US 4,061,191 AGranted
Method for gaseous sand consolidation treatment of weak gas sands
AssigneeShell Oil Company
InventorsFranciscus H. Meijs, David R. Davies
Life of this patent
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Abstract
In a relatively weak water-wet gas-producing reservoir in which a liquid tends to impair the gas production, the rock strength is increased by injecting a silicon polyhalide vapor, such as silicon tetrachloride vapor, mixed with a relatively inert gas, so that the silicon halide converts the rock-wetting water to a rock-strengthening silica gel.
Claims10
A process for increasing the rock strength of a water-wet gas-producing reservoir which is susceptible to impairment by liquid blocking and is or is likely to become unconsolidated, comprising:
- adjusting the water content of the reservoir to the extent necessary to provide a significant but small proportion of water on the rock surfaces;
- mixing a vapor of a silicon polyhalide having a water reactivity substantially equivalent to that of silicon tetrachloride with a substantially inert gas;
- and
- injecting the mixture into the reservoir to convert a significant proportion of the rock-wetting water to a rock strengthening silica gel in the region around the well without unduly reducing the effective permeability of the reservoir.
1 more element
Dependencies are inferred from the claim text.