Unlimited-level full-bore staged fracturing sand prevention pipe column and production method thereof

Abstract

The invention discloses an unlimited-level full-bore staged fracturing sand prevention pipe column. The pipe column comprises a suspension fracturing packer, a shaft isolation valve and a float shoe,wherein at least three layers of staged fracturing sand prevention double-stage mechanisms are arranged between the suspension fracturing packer and the shaft isolation valve; each staged fracturing sand prevention double-stage mechanism comprises an open hole fracturing packer, a fracturing suite, a production suite, an unpacking component and a double-stage screen pipe; the unpacking componentsare put to open the fracturing suites to achieve fracturing construction of all layers of the pipe column; and the unpacking components are put to open the production suites to achieve a double-layerscreen pipe full-bore production channel, and meanwhile the fracturing suites are closed to achieve the sand prevention effect. Accordingly, the problem that the number of staged fracturing layers ofan oil-gas well is limited by the inner diameter of the fracturing construction pipe column and the ball seat level difference is solved, and one-layer or unlimited-level segmentation is achieved; andmeanwhile, the sand prevention function after oil-gas well fracturing is achieved, the exploitation life cycle of the oil-gas well is prolonged, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploration, in particular to an infinite-stage full-diameter segmental fracturing sand control string and a production method thereof. Background technique [0002] With the deepening of oil and gas exploration and development technology, horizontal wells have become an important means to improve the efficiency and benefits of oilfield exploration and development, and its technology has been widely used. During the development process, we will encounter the development problem of low oil well production after conventional sand control in unconsolidated sandstone reservoirs, heavy oil sand-producing reservoirs, and low-production sand-producing reservoirs. Measures to stimulate production by staged fracturing are required. If only the number and scale of fracturing are increased to increase the production of heavy oil sand producing wells and low permeability oil and gas reservo...

AI Technical Summary

Problems solved by technology

Due to the limitation of the inner diameter of the tubing and the difference of the spherical seat, the number of layers in the fracturing segment will be limited, and it is impossible to realize multi-cluster or infinite-level layering according to the actual well conditions and geological conditions, and it is impossible to effectively form a dense network. shaped fracturing cracks, thus affecting the effect of fracturing construction

At the same time, heavy oil sand production wells or low permeability oil and gas reservoirs may produce sand after fracturing. The current fracturing string has no sand control function. Due to the limitation, the sand control string cannot be run or the size of the sand control string is small, which will affect the production of oil and gas wells in the later stage

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