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Method for tracking and evaluating profile control and displacement effect of horizontal well

A horizontal well, control and flooding technology, which is applied in earth-moving drilling, wellbore/well components, etc., can solve the problems of calculating reservoir permeability, inability to achieve quantitative characterization, and poor adaptability of horizontal well control and flooding. Improve the effect of regulating and driving, the value of extensive practical application, and the effect of strong intuition

Active Publication Date: 2021-11-02
CNOOC ENERGY TECH & SERVICES
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to quickly and accurately calculate the reservoir permeability with the current evaluation method of control and displacement effect. The classic Hall curve method is derived from the radial flow of vertical wells. Poor adaptability, unable to achieve accurate quantitative characterization

Method used

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  • Method for tracking and evaluating profile control and displacement effect of horizontal well
  • Method for tracking and evaluating profile control and displacement effect of horizontal well
  • Method for tracking and evaluating profile control and displacement effect of horizontal well

Examples

Experimental program
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Effect test

Embodiment

[0051] Example: Tracking and evaluation of control and flooding effect of well A10H in Bohai Q Oilfield

[0052] The Bohai Q oilfield has entered the stage of high water cut development. The comprehensive water cut of the oilfield exceeds 85%. After years of water injection development, the dominant seepage channels in the reservoir have been continuously developed, resulting in ineffective water cycle and water flooding effect gradually deteriorated. As an important means of stabilizing oil and controlling water, control and flooding has been well applied in Q Oilfield. For the A10H well group with clear injection-production relationship and prominent plane contradiction, deep control and flooding with nano-microspheres was carried out in time. A10H well group is "one injection and two production", one water injection well A10H well, two oil wells A09H and A12H wells, such as figure 1 .

[0053] According to the requirements of step 1), the relevant data of the water injecti...

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Abstract

The invention discloses a method for tracking and evaluating the profile control and displacement effect of a horizontal well. Based on a classical Hall curve method, a horizontal well seepage theory is introduced for improvement, and actual data is combined for simplification, the derivative form is deduced, the reservoir permeability is calculated, and a new method capable of tracking and evaluating the profile control and displacement effect of the horizontal well is established. The method has the advantages that the data acquisition is convenient and fast, the intuition is strong, the quantitative evaluation can be realized, the timeliness and accuracy are high, and the defects of methods and technologies for evaluating the profile control and displacement effects of the horizontal well at the present stage are overcome. According to the novel method for tracking and accurately evaluating the profile control and displacement effect of the horizontal well in real time provided by the invention, problems can be found in time according to the reservoir permeability change form, the field optimization of the profile control and displacement process is guided, the profile control and displacement effect is continuously improved, and the method has a wide practical application value.

Description

technical field [0001] The invention belongs to the field of oil field development control and displacement technology, and specifically relates to a method for tracking and evaluating the control and displacement effect of a horizontal well. The present invention is a new method for tracking and evaluating the control and displacement effect of a horizontal well based on the improved Hall curve method. By calculating the reservoir permeability, this method can quickly track and accurately evaluate the plugging effect of horizontal well control and flooding, find problems in time according to the change pattern of permeability, guide the field to optimize the control and flooding process, and improve the control and flooding effect. Background technique [0002] With the continuous development of oilfields, the comprehensive water cut continues to rise, and the oilfield production declines rapidly. In order to improve the effect of water flooding development, control and floo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08
CPCE21B49/087Y02A10/40
Inventor 张利健田盼盼黎运秀任宜伟张震路强尹彦君魏莉许胜利张忠哲
Owner CNOOC ENERGY TECH & SERVICES
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