| 摘要 |
In some embodiments, the invention provides methods useful for subterranean operations, and more particularly, to swellable spacer fluids for sealing an annular space in a well bore, such as the annular space between a tubular and the subterranean formation or between two concentric tubulars or for forming a seal inside a well bore in the subterranean formation. One method involves providing a swellable fluid, wherein the swellable fluid comprises: an aqueous fluid, a crosslinking agent, and at least a plurality of swellable particles; and placing the swellable fluid in a subterranean formation, and allowing the spacer fluid to form a semi-solid crosslinked gel structure in the subterranean formation.
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