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Method for dynamically assessing petroleum reservoir competency and increasing production and recovery through asymmetric analysis of performance metrics

A reservoir and recovery technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve problems such as low long-term recovery, difficult to plan action plans, low short-term productivity, etc.

Active Publication Date: 2012-12-05
QRI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, available data may take years to accumulate and evaluate, and may still change dynamically, making it difficult, if not impossible, to plan and implement economically and / or technically feasible action plans
The result is low short-term productivity and low long-term recovery of continuing oil reservoirs

Method used

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  • Method for dynamically assessing petroleum reservoir competency and increasing production and recovery through asymmetric analysis of performance metrics
  • Method for dynamically assessing petroleum reservoir competency and increasing production and recovery through asymmetric analysis of performance metrics
  • Method for dynamically assessing petroleum reservoir competency and increasing production and recovery through asymmetric analysis of performance metrics

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0789] Background Information

[0790] The field in this example is producing with peripheral water injection. It is in a mature consumption state having produced more than 70% of its reserves. Initiated redesign work to reduce field decline rate and water cut. A secondary purpose is to reduce ESP requirements and associated funding procedures.

[0791] geology

[0792] The field produces from a 60+ meter thick carbonate reservoir consisting of multiple upwardly shallowing periods. The reservoir has an average porosity of over 15% and a permeability of up to several Darcy. The upper half of the reservoir is usually very high reservoir quality; the lower half contains multiple interbeds of high and low reservoir quality. Enhance the quality of the lower half of the reservoir by increasing the fracture permeability, which significantly improves the reservoir conductivity, but also increases the risk of premature water breakthrough. The reservoir has a structural closure of...

example 2

[0797] Background Information

[0798] The field in this example was producing at a production rate of 300,000 barrels per day in 2006 and is the third increment of a three-increment field development plan. It's under the perimeter water injection. Due to concerns about premature water breakthrough, excessive development costs, and high well decline rates (all due to complex geology), redesign work was initiated to design new production increments. These considerations are based on experience gained through the development and performance of two adjacent oil-bearing increments.

[0799] geology

[0800] The field produces from a 60 meter thick carbonate reservoir consisting of multiple upwardly shallowing periods. The reservoir has an average porosity of about 15% and a permeability of up to 100 mD. The upper half of the reservoir is usually of medium reservoir quality; the lower half contains multiple interbeds of medium and low reservoir quality. Reservoir quality is en...

example 3

[0805] Background Information

[0806] The oil field in this example was producing at a production rate of 500,000 barrels per day in 1998. The field was developed with only one kilometer long horizontal wells. Current plans call for increasing production to 750,000 barrels per day by 2010. Initiate redesign efforts to reduce production decline, gas oil ratio (GOR), and associated field development capital and operating costs.

[0807] geology

[0808] The field is characterized by a gently folded northeast / southwest-trending anticline composed primarily of Cretaceous-era sandstones, shales and carbonates. The reservoir consists of thick crustal uplifts that change laterally into barriers and sill slopes. While matrix porosity is generally high (with an average value of 25%) and does not vary laterally, permeability is face-dependent and exhibits spatial variability. Typical permeability ranges from 5 to 10 mD in the southern portion dominated by low-energy lagoon accumul...

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Abstract

Methods for accurately assessing the condition of a petroleum reservoir and designing and implementing a plan of action to increase production and recovery of petroleum from the reservoir. Information is gathered using a unique set of metrics and information gathering techniques and analyzed in a targeted fashion by properly weighting the data in the context of the particular reservoir and goals of the producer. A reservoir rating is generated using asymmetric analysis of metrics and then used to formulate a plan of action. Production architecture (e.g., number, location and manner of constructing oil and injector wells) is then constructed according to the plan of action. Reservoir performance can be continuously monitored and used to verify production and recovery goals and / or provide triggers or alarms to alter production equipment.

Description

technical field [0001] The present invention is in the field of petroleum recovery, and more specifically, in the field of petroleum reservoir design, management and response. Background technique [0002] Petroleum is an important source of fuel and the lifeblood of modern society. There is enormous economic opportunity in finding and extracting oil. Due to a variety of technical and geological obstacles, it is often impossible to recover all the oil contained in a reservoir. [0003] Until 1965, typical oil reservoir recovery rates were about 25%. That is, this is a fraction of the oil in the reservoir that can be economically and / or feasibly extracted. The remaining 75% remains substantially unrecoverable due to technical and / or economic obstacles. Since then, average recovery has increased to approximately 35% due to improved technology and increased economic incentives due to higher crude oil prices. While this represents a significant increase in average total rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B49/00
CPCE21B49/00E21B43/00
Inventor 南森・G・萨莱里罗伯特・M・托罗尼
Owner QRI GROUP
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