Intelligent control sand control screen for huff and puff production in sand-producing oil and gas reservoirs and production technology

Abstract

The invention relates to the technical field of sand control well completion in oil and natural gas development and exploitation industries, in particular to an intelligent control sand control screen used for the huff and puff production of sand producing oil and gas reservoirs, including base pipes and inner layer barriers arranged sequentially from inside to outside Sand medium, inner layer diversion guide tube, outer layer sand retaining medium assembly and outer layer diversion guide tube. The intelligent control sand control screen used for the huff and puff production of sand producing oil and gas reservoirs of the present invention relies on the pressure difference between the inner and outer fluids of the screen by adding an inner layer diversion guide tube, an outer layer sand retaining medium assembly and an outer layer diversion guide tube. Realize the automatic rotation and positioning of the outer sand retaining medium assembly, and then realize the combination of different positions of the inner sand retaining medium and the outer sand retaining medium according to the needs of steam injection or mining, which can improve the effect of steam injection and reduce screen blockage. Improve sand control and mining benefits. The present invention also provides a technology for steam injection and production in huff and puff wells using the above-mentioned intelligent control sand control screen used for huff and puff production of sand producing oil and gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of sand control well completion in oil and natural gas development and exploitation industries, in particular to an intelligently regulated sand control screen and a mining process for huff and puff production of sand producing oil and gas reservoirs. Background technique [0002] During the development or production of heavy oil reservoirs and gas storages, formation sands are often produced from the reservoirs. Sand production in the formations will result in low production of heavy oil wells and gas storage injection-production wells, and steam injection (or Natural gas or polymer injection, etc.) have a series of problems, and sand control operations are commonly used on-site countermeasures. As a widely used sand control technology, mechanical screen sand control is also often used in sand control operations of heavy oil wells and gas storage wells. In the development process of heavy oil wells, the st...

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Problems solved by technology

Similarly, gas storage injection-production wells, polymer injection wells, water injection wells, foam huff-puff wells and other huff-puff wells all have similar complex working conditions. The following problems still exist in the application of traditional mechanical screens in huff-puff wells: (1) After the last round of steam huff and puff, the sand retaining medium was blocked by the formation sand and mud carried by the produced fluid, resulting in a greatly reduced permeability of the sand retaining medium. Since the sand retaining accuracy of the sand retaining medium is fixed, it will cause the next Difficult to inject steam during rounds of steam huff and puff, which seriously affects the production of oil wells

(2) Due to the single sand retaining accuracy of the sand retaining medium, it is impossible to balance the sand retaining and production during mining, and it will also cause the sand retaining medium to be blocked quickly, and the effective period of sand control is short, resulting in poor overall development benefits of huff and puff wells

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