Anti-channeling pack-off particles used in a production section of an oil-gas well, and completion method and production method using such particles

摘要

Anti-channeling pack-off particles used in a production section of an oil-gas well, a completion method, and a production method are provided. The anti-channeling pack-off particles are macromolecule polymer particles having an average particle diameter of 0.05-1.0 mm and a real density of 0.8-1.4 g/cm3. The particles are compactly filled into a space of the oil-gas well, which is required to be filled and packed off so that there is no channeling path after filling, thus effectively pack-off or sectioning the oil-gas well into multiple, relatively independent regions for production from the oil-gas well, and thus improving the production efficiency of the oil-gas well. Even if a channeling path occurs, a very small flow of channeling fluid of a carrier medium will move some of the anti-channeling pack-off particles in a direction towards the channeling path and accumulate those particles until the channeling path is filled, thereby achieving favorable effects of anti-channeling, packing-off, and sectional flow control.

主权项

1. A completion system of an oil-gas well for controlling a flow of a formation fluid or an injection fluid in a sub-divided section of the oil-gas well, the system comprising:
a flow control filter string; and anti-channeling pack-off particles, wherein the flow control filter string is a filter that includes a flow regulating and controlling device, wherein the anti-channeling pack-off particles are provided in an annular space formed by an outer wall of the flow control filter string and a wall of the oil-gas well such that, when the flow control filter string is used to control the flow of the formation fluid or the injection fluid, the anti-channeling pack-off particles permit the formation fluid or the injection fluid to flow radially along the oil-gas well while limiting an axial flow of the formation fluid or the injection fluid along the oil-gas well, and wherein the anti-channeling pack-off particles are styrene and divinylbenzene cross-linked copolymer particles, which have an average particle diameter of 0.05-1.0 mm and a real density of 0.96-1.06 g/cm3.