Single-section crack liquid production contribution rate evaluation method and device based on pressure drop data

A contribution rate, single-stage technology, applied in earthwork drilling, design optimization/simulation, measurement, etc., can solve problems such as inability to obtain fracture flow at all levels, high operating cost, and poor practicability

Active Publication Date: 2020-02-18
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

However, this method has high operating cost, long cycle and poor practicability.
In addition, monitoring fracture flow by adding tracers is also a method to obtain the contribution rate of fracture fluid production, but there are few types of tracers that have been found and can be applied s

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  • Single-section crack liquid production contribution rate evaluation method and device based on pressure drop data
  • Single-section crack liquid production contribution rate evaluation method and device based on pressure drop data
  • Single-section crack liquid production contribution rate evaluation method and device based on pressure drop data

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Embodiment Construction

[0076] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0077] figure 1 The structure diagram of the single-stage fracture liquid production contribution rate evaluation system based on the pressure drop data provided by the embodiment of the present invention.

[0078] Such as figure 1 As shown, the system provided in this embodiment includes a terminal 101 or a server 102 . Wherein, the terminal 1...

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Abstract

The embodiment of the invention provides a single-section crack liquid production contribution rate evaluation method and device based on pressure drop data. The method comprises the steps that the reservoir closing pressure of a target well is determined; a reservoir filtration coefficient expression is determined according to the expression of the crack volume reduction amount and the total filtration loss amount; the maximum crack height is determined by solving a crack height equation; the maximum crack width is determined according to the maximum crack height and the reservoir closing pressure, and the average crack width is determined according to the maximum crack width; the crack length is determined according to the reservoir filtration coefficient expression, the maximum crack height and the maximum crack width, and the half crack length is determined; the liquid production amount of a target crack is determined according to the measured crack porosity, the measured formationthickness, the measured crack liquid phase pressure, the measured crack liquid phase viscosity, the measured liquid phase volume coefficient, the measured well bottom pressure, the obtained average crack width and the obtained half crack length; and the contribution rate of the target crack is determined according to the liquid production amount of the target crack and the total liquid productionamount of the well bottom. The liquid production contribution rate of the single-section crack can be accurately evaluated, and the cost is low.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of oil and gas field development, and in particular to a method and equipment for evaluating the liquid production contribution rate of a single-stage fracture based on pressure drop data. Background technique [0002] With the continuous application and technical progress of hydraulic fracturing technology in oilfield development, how to better evaluate the operation effect of hydraulic fracturing has become an important part of hydraulic fracturing verification. Among them, the evaluation of the fluid production contribution of a single fracture under multiple fractures has gradually become an important index for evaluating the operation effect of hydraulic fracturing. [0003] At present, the existing methods for studying the contribution rate of fracture fluid production are mainly: directly measure the total fluid production and the fluid production of each fracture, and calcul...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/06G06F30/20
CPCE21B47/06E21B49/00
Inventor 王飞陈巧韵阮颖琪张士诚
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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