Method and device for determining borehole orientation of horizontal well in fractured reservoir

A horizontal well, azimuth technology, applied in wellbore/well components, earthwork drilling, production of fluids, etc., can solve the problem that the production capacity is not the maximum, and achieve the effect of accurate production capacity

Active Publication Date: 2021-09-28
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a method and device for determining the borehole azimuth of a horizontal well in a fractured reservoir, which can solve the problem that the production capacity of the borehole azimuth output of a horizontal well determined in the prior art may not be the biggest problem

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  • Method and device for determining borehole orientation of horizontal well in fractured reservoir
  • Method and device for determining borehole orientation of horizontal well in fractured reservoir
  • Method and device for determining borehole orientation of horizontal well in fractured reservoir

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Embodiment Construction

[0090] 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.

[0091] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It should be understood that the data so used are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclu...

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Abstract

The invention provides a method and device for determining the borehole orientation of a horizontal well in a fractured reservoir. The method includes: obtaining the occurrence characteristics of natural fractures in the fractured reservoir according to the logging data of the fractured reservoir; sample, and establish a fracture-bedrock dual seepage model, the rock sample is taken from the core of the fractured reservoir, and the fracture-bedrock double seepage model is used to represent the relationship between the wellbore orientation and productivity; according to the The occurrence characteristics of natural fractures in the fractured reservoir and the fracture-bedrock dual seepage model are used to obtain the productivity corresponding to N different borehole orientations, and the N is an integer greater than or equal to 2; according to the N different The production capacity corresponding to the wellbore azimuth is used to determine the target wellbore azimuth. The method and device for determining the borehole azimuth of a horizontal well in a fractured reservoir provided by the present invention can solve the problem that the production capacity of the borehole azimuth output of a horizontal well determined in the prior art may not be the biggest problem.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a method and a device for determining the borehole orientation of a horizontal well in a fractured reservoir. Background technique [0002] At present, there are oil and gas areas all over the world. Taking the Tarim Basin in China as an example, the Tarim Basin is a typical oil and gas basin with huge potential for exploration and development. In the main oil and gas producing areas of the Tarim Basin, the reservoirs are mainly low-permeability fractured sandstone reservoirs, and horizontal wells are generally used for oil and gas development in this reservoir. However, due to the different development of fractures in the reservoir, horizontal wells usually output different oil and gas productivity under different borehole orientations. Therefore, the determination of the borehole orientation of horizontal wells is particularly important. [0003] In the prior ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B49/00
CPCE21B43/26E21B49/00
Inventor 杨沛杨成新卢运虎梁红军
Owner PETROCHINA CO LTD
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