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Water pumping and grit layer formation recharge well and well completion process
The invention discloses a water pumping and grit layer formation recharge well and a well completion process. According to the water pumping and grit layer formation recharge well and the well completion process, a mud layer of a water filtration section is sealed through a cement well cementation layer to prevent contact between the mud layer and water in a well; a grit layer formation space is formed between a water filtration pipe assembly and an intermediate casing, and an accurate grit layer is formed under the action of pumped water flow; by adjusting the pitch of trapezoidal wires of the water filtration pipe assembly, the grit diameter of the grit layer is controlled. Through the well completion process, the problems existing sand production and blockage of the recharge well, the problem that grit filling is not in place and the problem that a great deal of river channel sand is mined can be effectively solved. Mud and sand layers are accurately separated. Generation of new suspended substances is prevented in the recharging process. The recharging efficiency is improved. The recharging continuity and stability are enhanced. The recharging operation difficulty and operationcost are reduced. The water pumping and grit layer formation recharge well and the well completion process have the ideal effect.
本发明公开了抽水造砾回灌井与成井工艺，其通过水泥固井层封住滤水段的泥层，避免泥层与井内水流的接触；在滤水管组合与技术套管之间形成造砾空间,通过抽水的水流作用，形成精准的造砾层；通过调整滤水组合的梯形丝间距，控制造砾层的砂砾砾径；通过此种工艺，可有效解决回灌井出砂和堵塞问题、填砾不到位问题、大量开采河道砂问题；使得泥砂层精准分离、避免在回灌过程中产生新的悬浮物，增加了回灌的效率、增强了回灌的持续性及稳定性、降低了回灌的操作难度及运行成本，是一种理想的抽水造砾回灌井与成井工艺。
Water pumping and grit layer formation recharge well and well completion process
The invention discloses a water pumping and grit layer formation recharge well and a well completion process. According to the water pumping and grit layer formation recharge well and the well completion process, a mud layer of a water filtration section is sealed through a cement well cementation layer to prevent contact between the mud layer and water in a well; a grit layer formation space is formed between a water filtration pipe assembly and an intermediate casing, and an accurate grit layer is formed under the action of pumped water flow; by adjusting the pitch of trapezoidal wires of the water filtration pipe assembly, the grit diameter of the grit layer is controlled. Through the well completion process, the problems existing sand production and blockage of the recharge well, the problem that grit filling is not in place and the problem that a great deal of river channel sand is mined can be effectively solved. Mud and sand layers are accurately separated. Generation of new suspended substances is prevented in the recharging process. The recharging efficiency is improved. The recharging continuity and stability are enhanced. The recharging operation difficulty and operationcost are reduced. The water pumping and grit layer formation recharge well and the well completion process have the ideal effect.
本发明公开了抽水造砾回灌井与成井工艺，其通过水泥固井层封住滤水段的泥层，避免泥层与井内水流的接触；在滤水管组合与技术套管之间形成造砾空间,通过抽水的水流作用，形成精准的造砾层；通过调整滤水组合的梯形丝间距，控制造砾层的砂砾砾径；通过此种工艺，可有效解决回灌井出砂和堵塞问题、填砾不到位问题、大量开采河道砂问题；使得泥砂层精准分离、避免在回灌过程中产生新的悬浮物，增加了回灌的效率、增强了回灌的持续性及稳定性、降低了回灌的操作难度及运行成本，是一种理想的抽水造砾回灌井与成井工艺。
Water pumping and grit layer formation recharge well and well completion process
抽水造砾回灌井与成井工艺
ZHOU QUNDAO (author) / ZHANG LING (author)
2020-11-13
Patent
Electronic Resource
Chinese
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