A method for monitoring hydraulic fractures based on pressure fluctuations in closed wellbore

A wellbore pressure and hydraulic fracturing technology, which is applied in the directions of measurement, earthwork drilling, wellbore/well components, etc., can solve the problems of unclear corresponding relationship, lower construction success rate, difficult interpretation and analysis of measured data, etc.

Active Publication Date: 2022-03-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, this technology still lacks an effective theoretical basis, and the corresponding relationship between the pressure change of the closed well and the fracture expansion during the fracturing process is not yet clear, and it is difficult for engineers to interpret and analyze the measured data, which reduces the success rate of construction.

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  • A method for monitoring hydraulic fractures based on pressure fluctuations in closed wellbore
  • A method for monitoring hydraulic fractures based on pressure fluctuations in closed wellbore
  • A method for monitoring hydraulic fractures based on pressure fluctuations in closed wellbore

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Embodiment Construction

[0109] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0110] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0111] In addition, if there are descriptions involving "first", "second" a...

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Abstract

An embodiment of the present invention relates to a method for monitoring hydraulic fracturing fractures based on pressure fluctuations in a closed wellbore. The method for monitoring hydraulic fracturing fractures based on pressure fluctuations in a closed wellbore includes the following steps: According to the formation information of drilling, completion and logging, obtain Wellbore parameters, geological parameters, fracturing construction and completion parameters of fracturing wells and sealing wells, and establish a physical model for fracture expansion and sealing wellbore pressure monitoring; establish a "wellbore-plane three-dimensional multi-fracture" fully coupled fracturing design calculation model ; Establish a calculation model for the closed wellbore volume and pressure fluctuations in the fracturing process; perform smoothing processing on the pressure data calculated in step S30, draw the evolution diagram of the closed well pressure and pressure change rate and the injection time of the fracturing well, and establish the closed wellbore pressure and a typical chart of pressure change rate; according to the forward modeling model of step S20 and step S30.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of oil and gas field development, in particular to a method for monitoring hydraulic fracturing fractures based on pressure fluctuations in closed well bores. Background technique [0002] Horizontal well staged multi-cluster fracturing is an important technology for the development of low-permeability and unconventional oil and gas reservoirs. At present, microseismic, inclinometer, optical fiber monitoring and other means are usually used to monitor the fracture shape during the fracturing process, so as to obtain the fracture shape during the fracturing process and optimize the construction design in real time. These monitoring methods have their own advantages, but they are generally high-cost monitoring technologies, which occupy a large operating expenditure in oil and gas well fracturing, which is not conducive to the development requirements of low-cost construction operatio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B43/26
CPCE21B47/00E21B43/26
Inventor 陈铭郭天魁刘晓强齐宁徐建春刘德新罗明良吴飞鹏王森王文东孙永鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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