Regulating separate layer production string and separate layer oil production method

Abstract

The invention relates to the technical field of oil field separate layer oil production engineering, in particular to a regulating separate layer production string and a separate layer oil production method. An oil pipe string of the regulating separate layer production string is vertically arranged in an oil well; the bottom end of an oil pipe string is sealed; a rod type oil sucking pump and a plurality of groups of sealing and distributing systems which are sequentially communicated are arranged on the oil pipe string; each group of sealing and distributing system comprises a packing device and an adjustable and controllable production regulator which are sequentially communicated; each packing device is arranged above an oil layer and is used for isolating and protecting the corresponding production regulator; and each production regulator is arranged at the middle upper part of the oil layer. The separate layer oil production method works on the basis of the regulating separate layer production string. The regulating separate layer production string and the separate layer oil production method have the advantages that through regulating and controlling the production regulators, the interlayer interference can be avoided; and the separate layer flowing pressure is controlled, so that the potentials of each layer are exerted to the maximum degree; the application of the production regulators is diversified; the separate layer oil production, water finding, water plugging and the like are subjected to integral construction; and three technical measures can be realized only through one pipe string.

Description

technical field [0001] The invention relates to the technical field of layered oil recovery engineering in oilfields, in particular to a layered production proration pipe string and a layered oil recovery method. Background technique [0002] Oilfield oil production uses layered production technology to develop multiple sets of oil-bearing formations to improve oil well production and development effects. In an oil well, when multiple sets of formations are co-produced, due to differences in pressure, physical properties of oil layers, and crude oil properties among oil layers, they often interfere with each other, so that some oil layers cannot play their due role. In order to reduce or eliminate interlayer interference, layer-by-layer production should be performed, including layer-by-layer oil recovery, layer-by-layer water injection and supporting technologies. Therefore, due to the difference in burial depth, formation pressure and permeability of oil layers, it is nec...

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Problems solved by technology

Or use the single-pump mixed pumping method, and use the constant pressure distribution device to adjust the production pressure difference of the oil layer to complete layered oil production. The pressure of the constant pressure distribution device has been set before the tool goes into the well. This technology cannot be satisfied with multi-layer The oil production section of the oil layer cannot be measured

[0004] To sum up, the current oil layer separation technology does not have a multi-layer layered oil recovery device that can intelligently control the flow pressure of layers, and there is no integrated construction of layered oil recovery, water search, and water shutoff. The technology of trip string can realize three functions

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