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Tracer release nipple, well completion pipe string, oil well monitoring method and application thereof

A well completion string and tracer technology, which is applied in the field of oil well production zone fluid production monitoring and oil well completion string, can solve the short, generally 3-6 months, and cannot meet the long-term monitoring of oil wells, etc. Achieve the effect of prolonging the dynamic monitoring time

Pending Publication Date: 2022-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this monitoring method, most of the tracer is carried out of the ground during the fracturing fluid flowback process, and the monitoring time is relatively short, generally 3-6 months, which cannot meet the long-term monitoring requirements of oil wells

Method used

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  • Tracer release nipple, well completion pipe string, oil well monitoring method and application thereof
  • Tracer release nipple, well completion pipe string, oil well monitoring method and application thereof
  • Tracer release nipple, well completion pipe string, oil well monitoring method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like figure 1As shown, a schematic structural diagram of the oil well tracer release sub-section provided in this embodiment is placed in the wellbore 2 . Wherein, the oil well tracer release sub includes a tracer body 3 , a non-porous base pipe 6 , a flow regulating water controller 5 , a first packer 1 and a second packer 7 . The first packer 1 and the second packer 7 are respectively fixed to two ends of the non-porous base pipe 6 . The tracer body 3 is wound and fixed on the outer wall of the non-porous base pipe 6 by KAPTON high temperature adhesive tape. In addition, a sieve tube 4 is arranged on the outer periphery of the tracer body 3 and the flow regulating water controller 5, and the sieve tube is a mesh structure made of stainless steel. In this embodiment, the thickness of the tracer body 3 is 6 mm, and the ratio of the length of the tracer body 3 to the length of the non-porous base pipe 6 is 2:3.

[0038] like figure 2 As shown, the flow regulating an...

Embodiment 2

[0041] The horizontal oil well was developed by hydraulic fracturing, and five stages were fractured. During the fracturing period, a completion string equipped with five oil-soluble tracers and five water-soluble tracers was run down into the target layer. Wherein, each tracer is pasted and fixed on the oil well tracer release short section described in Example 1 in the form of a tracer body.

[0042] In this example, samples from the wellhead between October 2017 and July 2018 were sampled and analyzed. The analysis results are shown in image 3 . Among them, for the histogram of each period, from left to right are the first segment, the second segment, the third segment, the fourth segment and the fifth segment.

[0043] Depend on image 3 , the oil production of the five fracturing sections varies greatly during the test. In the first month after fracturing (October 2017), the production of each section of the oil well after fracturing was relatively uniform. In general...

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Abstract

The invention discloses a tracer agent release short section, a well completion pipe string, an oil well monitoring method and application of the tracer agent release short section. The oil well tracer release nipple comprises a tracer body, a non-porous base tube, a flow adjusting water controller, a first packer and a second packer, the first packer and the second packer are fixed to the two ends of the non-porous base tube respectively, the tracer body is fixed to the outer wall of the non-porous base tube, and the flow adjusting water controller is fixed to the outer wall of the non-porous base tube. The flow regulating and water controlling device is arranged on a non-porous base pipe and located at the tail end of the tracer agent body, a liquid inlet and a liquid outlet are formed in the flow regulating and water controlling device, and materials in an oil well enter the non-porous base pipe through the liquid inlet. According to the oil well tracer agent release short section, tracer agent molecules can be slowly released, the fluid property and flow of each production layer of an oil well are inversely calculated according to the types of tracer agents in a sample and the concentration value of each tracer agent, the dynamic monitoring time of the oil well can be prolonged, and the effects of reducing cost and improving efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, in particular to a tracer release sub, an oil well completion string containing the tracer release sub, an oil well production layer monitoring method and applications thereof. Background technique [0002] Tracer technology has been used in domestic oilfield reservoir analysis for more than 50 years. Traditional tracers mainly include radioactive substances and water-soluble chemical materials. According to the development process of tracer types, the first generation tracers are chemical tracers developed in the 1950s, the second generation tracers are radioisotope tracers developed in the 1980s, and the third generation tracers The tracer is a non-radioactive stable isotope tracer developed in the 1990s, and the fourth-generation tracer is a tracer tracer developed in this century. Tracer technology is mainly used in remaining oil monitoring, water flooding front mo...

Claims

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Application Information

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IPC IPC(8): E21B47/11
Inventor 邸德家何祖清郭肖庞伟毛军赵旭吴琼杜娟周朝
Owner CHINA PETROLEUM & CHEM CORP