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Evaluation method and system for fracturing fractures in horizontal wells

An evaluation method and evaluation system technology, applied in the field of evaluation of horizontal well fracturing fractures, can solve problems such as inability to solve complex fractures, poor operability, and inability to quantitatively evaluate

Active Publication Date: 2021-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] None of the related literature can solve the problem of whether complex cracks are formed, and the extent of the cracks formed
In contrast, the G function analysis method can qualitatively judge whether complex cracks are formed, and is relatively easy to calculate. At present, the main problem is that it cannot be quantitatively evaluated, and the operability in the application process is poor, which needs to be studied and improved.

Method used

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  • Evaluation method and system for fracturing fractures in horizontal wells
  • Evaluation method and system for fracturing fractures in horizontal wells
  • Evaluation method and system for fracturing fractures in horizontal wells

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Embodiment

[0083] image 3 A flow chart of the steps of a method for evaluating fractures in horizontal wells according to an exemplary embodiment of the present invention is shown.

[0084] This embodiment proposes a method for evaluating fractures in horizontal wells, including:

[0085] Classify according to the type of G-function curve;

[0086] Quantitative assignment of various G-function curves;

[0087] A calculation model for the evaluation coefficient of fracture complexity is established.

[0088] Figure 4a , Figure 4b , Figure 4c with Figure 4d Schematic diagrams of four G function curves according to an exemplary embodiment of the present invention are respectively shown.

[0089] Such as Figure 4a-Figure 4d As shown, according to the complexity of fractures reflected on the G-function analysis curve after horizontal well fracturing, the G-function curve is divided into four types of curves.

[0090] The first type of curve, the fluctuation frequency is 4-6 tim...

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Abstract

The invention discloses an evaluation method and system for fracturing fractures in horizontal wells. The method includes: classifying according to the types of G-function curves; assigning values ​​to various G-function curves quantitatively; and establishing a calculation model for evaluating coefficients of fracture complexity. The invention has the advantage that by calculating the evaluation coefficient of the complexity degree of fractures in horizontal well fracturing, the quantitative evaluation of fracture complexity can be realized, and the evaluation basis of fracturing effects can be provided for development technicians.

Description

technical field [0001] The invention relates to the field of oil and gas field development, and more specifically, to an evaluation method and system for fracturing fractures in horizontal wells. Background technique [0002] In the process of shale gas development, some hydraulic fracturing means are adopted to extend artificial fractures and communicate with natural fractures, thereby forming a complex fracture network in which artificial fractures and natural fractures are interlaced, increasing the volume of reservoir stimulation, improving single well productivity and ultimate recovery rate. The formation of complex fracture networks is considered to be the key to successful fracturing of shale gas wells, and judging the complexity of fracture morphology after fracturing has a certain guiding effect on further optimizing fracturing parameters and rationally deploying development well patterns. [0003] Complex microseismic monitoring technology has been developed to ev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06Q50/02
CPCG06Q50/02G06F30/20
Inventor 刘长印孙志宇黄志文李凤霞范鑫
Owner CHINA PETROLEUM & CHEM CORP