Intelligent regulation and control sand control screen pipe for sand production oil and gas reservoir huff and puff production and exploitation process

Abstract

The invention relates to the technical field of sand control well completion in the petroleum and natural gas development and exploitation industry, and particularly relates to an intelligent regulation and control sand control screen pipe for sand production oil and gas reservoir huff and puff production. The intelligent regulation and control sand control screen pipe comprises a base pipe, an inner layer sand blocking medium, an inner layer steering flow guide cylinder, an outer layer sand blocking medium assembly and an outer layer steering flow guide cylinder which are sequentially arranged from inside to outside. According to the intelligent regulation and control sand control screen pipe for sand production oil and gas reservoir huff and puff production, the inner layer steering flow guide cylinder, the outer layer sand blocking medium assembly and the outer layer steering flow guide cylinder are additionally arranged, automatic rotation and positioning of the outer layer sand blocking medium assembly are achieved through the pressure difference of fluid inside and outside the screen pipe, then different position combinations of the inner layer sand blocking medium and the outer layer sand blocking medium are achieved according to the steam injection or exploitation requirements, the steam injection effect can be improved, screen pipe blockage is relieved, and sand control and exploitation benefits are improved. The invention further provides a process for carrying out huff and puff well steam injection and exploitation through the intelligent regulation and control sand control screen pipe for sand production oil and gas reservoir huff and puff production.

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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