Method and combination device for controlling profile and blocking water for thickened oil horizontal well of screen pipe well completion

A technology for screen completion, profile control and water blocking, which is applied in wellbore/well components, earth-moving drilling, and fluid production, etc., and can solve problems such as increasing the difficulty of water blocking.

Inactive Publication Date: 2012-08-01
PETROCHINA CO LTD
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Problems solved by technology

In addition, heavy oil thermal recovery horizontal wells require high-temperature steam injection, and the corresponding water shutoff proces

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  • Method and combination device for controlling profile and blocking water for thickened oil horizontal well of screen pipe well completion
  • Method and combination device for controlling profile and blocking water for thickened oil horizontal well of screen pipe well completion
  • Method and combination device for controlling profile and blocking water for thickened oil horizontal well of screen pipe well completion

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Embodiment Construction

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0027] The present invention proposes a profile control and water shutoff method for heavy oil horizontal wells completed with screen tubes. The water shutoff method at least includes the following steps:

[0028] (1) Transport the perforating device to the predetermined position of the horizontal slotted screen through the tubing; the predetermined position is the position on the slotted screen corresponding to the water outlet section of the horizontal well; perforation;

[0029] (2) Pull out the perforating device; the oil pipe will transport the chemical plugging string to the predetermined position to perform chemical water plugging on the water outlet section of the horizontal well;

[0030] (3) Pull out the chemical plugg...

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Abstract

The invention relates to a combination device for controlling a profile and blocking water for a thickened oil horizontal well of screen pipe well completion. The combination device comprises a perforation device, a chemical plugging pipe column and a mechanical plugging pipe column which are arranged at a preset position in a horizontal well of the screen pipe well completion sequentially and alternatively. The chemical plugging pipe column is formed by a first plug, a first packer, an explosive relief valve and a second packer sequentially, an oil pipe with certain length is connected between the two packers, and the explosive relief valve is connected with the inside the oil pipe between the two packers. The mechanical plugging pipe column is formed by a second plug, a production screen pipe, a cutting uniflow valve, a third packer and a fourth packer sequentially, and an oil pipe with certain length is also connected between the third packer and the fourth packer. By means of a combination method of chemical plugging outside a horizontal slotted screen and mechanical plugging inside the horizontal slotted screen, validity of water blocking is prolonged, a water blocking effect of the screen pipe well completion is improved, oil producing capacity of an water-emerging thickened oil horizontal well is recovered, and a problem of water emerging of the thickened oil horizontal well of the existing screen pipe well completion is solved.

Description

technical field [0001] The invention relates to a method and device for profile control and water shutoff of oil-water wells in the field of oil production engineering, in particular to a method for profile control and water shutoff of heavy oil horizontal wells completed with screen tubes and a combined device thereof. Background technique [0002] The water shutoff technology of oil well is an important technology in oilfield development. Through water shutoff in oil well, it can effectively reduce the ineffective water production of oil well, increase the oil production of oil well, and finally improve the recovery rate of oil well. my country began to study this technology in the 1960s, and has formed relatively mature mechanical water shutoff and chemical water shutoff two types of water shutoff technology. Regardless of whether it is mechanical water plugging or chemical water plugging, the main targets of implementation are still vertical wells with common well comple...

Claims

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Application Information

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IPC IPC(8): E21B43/22E21B33/122E21B43/08E21B43/11
Inventor 张守军郎宝山吴非罗恩勇郭洪军许丹杨海青顾艳秋田玉秋卞子峰黄剑华郭英刚张殿宇孙美玲周明旺
Owner PETROCHINA CO LTD
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