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Real-time monitoring and evaluating method for underground casing deformation induced by reservoir fracturing transformation

A technology of real-time monitoring and evaluation methods, which is applied in the directions of surveying, earthwork drilling and production, boreholes/well components, etc. It can solve the problems that real-time monitoring and risk prediction of casing cannot be realized, and achieve high-capacity data fidelity, fastness and optimization Effects of fracturing parameters and reducing the degree of casing deformation

Pending Publication Date: 2021-01-29
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, people make more use of geophysical logging methods such as multi-arm caliper logging, electromagnetic flaw detection logging, downhole optical TV imaging logging, ultrasonic imaging logging, well temperature logging, water injection flow measurement, etc. Real-time monitoring and risk prediction of casing deformation cannot be realized by detecting the degree of deformation and deformation position after deformation, and it is subject to constraints such as wellbore operating environment, construction operation cost, and construction time limit

Method used

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  • Real-time monitoring and evaluating method for underground casing deformation induced by reservoir fracturing transformation
  • Real-time monitoring and evaluating method for underground casing deformation induced by reservoir fracturing transformation
  • Real-time monitoring and evaluating method for underground casing deformation induced by reservoir fracturing transformation

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Effect test

Embodiment 1

[0047] A method for real-time monitoring and evaluation of downhole casing deformation induced by reservoir fracturing, including: using the combination of horizontal well pumping bridge plug perforation and casing magnetic positioning measurement to measure casing joints and casing in real time Magnetic anomaly, by analyzing the magnetic anomaly characteristics of the casing, real-time monitoring and evaluation of the deformation degree and development trend of the downhole casing.

[0048] Described method specifically comprises the steps:

[0049] a. The combination of magnetic positioning instrument and horizontal well pumping bridge plug perforation pipe string into the well, using the magnetic positioning instrument to record the magnetic data of the casing before sealing the bridge plug or perforating, and above after sealing the bridge plug or perforating The magnetic positioning instrument is used to record the magnetic data of the casing, and the magnetic data collec...

Embodiment 2

[0075] A method for real-time monitoring and evaluation of downhole casing deformation induced by reservoir fracturing, using magnetic positioning equipment and horizontal well pumping bridge plug perforation pipe strings into the well, and using magnetic The magnetic data of the casing is recorded by the positioning instrument, and the magnetic data of the casing is recorded by the magnetic positioning instrument after the bridge plug is sealed or perforated. Tube Magnetic Data Acquisition. Casing magnetic data is measured synchronously for each pumping bridge plug perforating operation, and casing magnetic anomaly monitoring is carried out by means of time-lapse logging. Using the collected horizontal well pumped perforation magnetic positioning time-lapse logging data, through data format conversion, data renaming, depth correction, data merging and other preprocessing, a real-time monitoring logging interpretation of casing deformation magnetic anomalies is formed in chron...

Embodiment 3

[0085] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Embodiments of the present invention are as follows:

[0086] figure 1 It is a schematic diagram of a combination of downhole tools combined with time-lapse logging real-time monitoring of downhole casing magnetic anomalies and pumped perforation in horizontal wells. Including cable 1, cable head 2, weight bar 3. Weight bar 4. Joint 5. Magnetic positioning 6. Special joint for perforation 7. Perforator 8. Perforator 9. Perforator 10. Seat sealing tool 1...

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Abstract

The invention discloses a real-time monitoring and evaluating method for underground casing deformation induced by reservoir fracturing transformation. The real-time monitoring and evaluating method comprises the following steps that the magnetic anomaly of a casing joint hoop and a casing is measured in real time by adopting a horizontal well pumping seat bridge plug perforation and casing magnetic positioning measurement combined operation mode, and the magnetic anomaly characteristics of the casing is analyzed to monitor and evaluate the deformation degree and the development situation of the underground casing pipe in real time. Real-time monitoring and evaluation of casing deformation induced by the reservoir fracturing transformation under the condition of a horizontal well shaft canbe achieved, and the influence of casing deformation on economic and efficient development of an unconventional oil and gas layer is reduced.

Description

technical field [0001] The invention belongs to the technical field of wellbore integrity geophysical well logging monitoring for reservoir stimulation, and in particular relates to a real-time monitoring and evaluation method suitable for downhole casing deformation induced by fracturing stimulation of horizontal well reservoirs. Background technique [0002] The successful commercial development of unconventional oil and gas such as shale gas has transformed the world's energy landscape. Since China launched shale gas exploration and development in 2006, it has successively established national shale gas demonstration areas such as Changning-Weiyuan, Zhaotong, and Fuling. In addition, CNPC also listed Dagang Oilfield, Xinjiang Oilfield, Tuha Oilfield and Changqing Oilfield as important demonstration areas for shale oil development. In the exploration and development of unconventional oil and gas such as shale gas, technologies such as horizontal well drilling and completi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/092E21B43/26G06F30/20
CPCE21B47/00E21B43/26G06F30/20
Inventor 刘子平屈玲王治平张庆张平张晓琳徐赣川董志刚刘琦
Owner BC P INC CHINA NAT PETROLEUM CORP
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