| 摘要 |
A segmental flow-control method for a flow-control filter string in an oil-gas well and an oil-gas well structure are disclosed. The oil-gas well includes a borehole wall(1), a casing(2) located in the borehole wall(1), a cement sheath(3) filled between the casing(2) and the borehole wall(1), bypass channels(5) located outside the casing(2), and a plurality of perforation channels (6) penetrating through the casing(2), the cement sheath(3) and/or the bypass channels(5) and into a formation from the inside of casing to the formation. The segmental flow-control method for the flow-control filter string(7) includes the following steps: lowering the flow-control filter string(7) into the casing, wherein, the flow-control filter string(7) is provided with a flow-control filter (8), and an annular space is at least partially formed between the flow-control filter string(7) and the casing(2); injecting a carrier liquid which carries anti-channeling isolating particles into the annular space through an injecting channel of the carrier liquid, thus the carrier liquid carries the anti-channeling isolating particles into the annular space, and enters the bypass channels(5) through the perforation channels(6); and closing the injecting channel for carrier liquid or a communicating part between the injecting channel for carrier liquid and the annular space.
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