Water-controlling sand prevention device and method used for fracturing horizontal gas well

Abstract

The invention discloses a water-controlling sand prevention device and method used for a fracturing horizontal gas well. The water-controlling sand prevention device comprises a double-layer tube, a supporting agent, a first packer and a second packer, wherein the double-layer tube comprises an inner layer tube body and an outer layer tube body sleeving the exterior of the inner layer tube body, an annular space is formed between the inner layer tube body and the outer layer tube body, and tube holes are formed in the tube walls of the inner layer tube body and outer layer tube body respectively; the supporting agent is arranged in the annular space and is a hydrophobic supporting agent, and the maximum particle size of the supporting agent is smaller than the average value of stratum separated particle sizes; the first packer and the second packer are annular and are arranged at the two ends of the double-layer tube respectively to close the supporting agent in the annular space. Withthe water-controlling sand prevention device and method, stratum particles and the supporting agent are controlled to enter a shaft, at the same time, water production of the gas well is controlled,production among all fracturing layers is not affected, and continuous efficient production of the horizontal gas well is guaranteed.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a water and sand control device and method for fracturing horizontal gas wells. Background technique [0002] As the production process progresses, sand production or water production may increase in the fractured horizontal gas well. How to control water production and sand production is very important for the continuous and efficient production of gas wells. The use of isolation devices or string equipment with sand control functions can usually provide an effective sand control or water control method. [0003] Patent CN201220370732.6 "Mechanical water plugging string for multi-stage fracturing horizontal well multi-point water outlet in cased well completion" provides a mechanical water plugging string for multi-stage fracturing horizontal well multi-point water outlet, using a combination of plugs and packers The target layer is sealed off, and the oi...

AI Technical Summary

Problems solved by technology

However, the equipment cannot be disassembled, and it does not help much with water control

[0008] In summary, although the above schemes have a significant effect on controlling water production or sand production in the production process of horizontal fracturing gas wells, most of the devices are too complicated, inconvenient to operate, and cannot achieve the goals of water control and sand control at the same time

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