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A Well Pattern Deployment Method for Very Thick Buried Hill Fractured Reservoirs

A well pattern deployment and oil reservoir technology, applied in wellbore/well parts, earthwork drilling and production, production fluid, etc., can solve the problems of large differences and individual differences, achieve small production pressure difference, improve sweep The effect of high area and single well production

Active Publication Date: 2017-10-03
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0002] At present, most of the existing well layout technologies at home and abroad are aimed at structural oil and gas reservoirs, and there is no mature well layout technology and well layout method for fractured reservoirs. The treatment of the same phenomenon varies from person to person, with large differences

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  • A Well Pattern Deployment Method for Very Thick Buried Hill Fractured Reservoirs
  • A Well Pattern Deployment Method for Very Thick Buried Hill Fractured Reservoirs
  • A Well Pattern Deployment Method for Very Thick Buried Hill Fractured Reservoirs

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0045] Before proposing the well pattern deployment method for extremely thick buried-hill fractured reservoirs of the present invention, it is first necessary to conduct relevant analysis on extremely thick buried-hill fractured reservoirs, specifically including:

[0046] 1. Analysis of characteristics of extremely thick buried hill fractured reservoirs:

[0047] (1) Extremely thick reservoirs: The effective thickness of extremely thick buried hill fractured reservoirs is hundreds of meters or even thousands of meters, and the vertical oil-bearing range is huge.

[0048] (2) Longitudinal high angle fractures: Affected by tectonic stress, fractured res...

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Abstract

The present invention relates to a well pattern deployment method for extremely thick buried-hill fractured oil reservoirs, which is characterized in that a set of large-fracture injection and small-fracture production is deployed in the extremely thick buried-hill fractured oil reservoirs. Injection-production well pattern of horizontal wells for injection and top production; Among them, large-fracture injection refers to deploying injection wells in large fracture areas of extremely thick buried-hill fractured reservoirs, and small-fracture production refers to deploying production wells in extremely thick buried-hill fractured reservoirs the small fracture area; plane stagger means that the injection wells and production wells are projected onto the plane and are parallel to each other but not facing each other; vertical three-dimensional means that the horizontal wells are arranged in parallel at different direction and perpendicular to the main wellbore to form a three-dimensional well pattern; bottom injection and top production mean that the water injection wells are arranged at the bottom of the extremely thick buried hill fractured reservoir, and the production wells are arranged at the top of the extremely thick buried hill fractured reservoir. The present invention can effectively solve the problem of well arrangement in extremely thick buried hill reservoirs, and is an effective well arrangement method for extremely thick buried hill fractured oil reservoirs.

Description

technical field [0001] The invention relates to a method for arranging wells, in particular to a method for arranging wells in extremely thick buried hill fractured oil reservoirs in the exploitation of oil and gas. Background technique [0002] At present, most of the existing well layout technologies at home and abroad are aimed at structural oil and gas reservoirs, and there is no mature well layout technology and well layout method for fractured reservoirs, which also leads to The treatment of the same phenomenon varies greatly from person to person. [0003] The well layout technology for structural oil and gas reservoirs is to deploy well positions on the established trap structures, and there are standard well patterns for reference. However, the distribution of fractured reservoirs is complex, the physical properties vary greatly, and are affected by faults, fractures and strong heterogeneity. For this kind of reservoirs, the key to well location deployment is not o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/30
Inventor 焦松杰丁祖鹏焦红梅李南李娜刘新光杨依依谭先红田冀
Owner CHINA NAT OFFSHORE OIL CORP
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