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Calculation method of out-of-control recoverable reserves in water drive reservoirs

A technology for reserve calculation and water flooding, which is used in surveying, earth-moving drilling and production, wellbore/well components, etc. It can solve the problems of unresearched, low efficiency, and large workload of uncontrolled recoverable reserves in a single well.

Active Publication Date: 2019-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For wells that stop production and stop injection, this method has problems such as poor decline regularity and insufficient calibration basis
Moreover, this method of calibrating the out-of-control recoverable reserves of a single well has a large workload, low efficiency, and poor operability
In addition, through literature research, no research has been done on the calculation of out-of-control recoverable reserves caused by stopping water injection wells

Method used

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  • Calculation method of out-of-control recoverable reserves in water drive reservoirs
  • Calculation method of out-of-control recoverable reserves in water drive reservoirs
  • Calculation method of out-of-control recoverable reserves in water drive reservoirs

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Embodiment Construction

[0019] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.

[0020] Such as figure 1 as shown, figure 1 It is a specific implementation flow chart of the out-of-control recoverable reserves of the shut-down wells of the present invention.

[0021] In step 101, the selected object is determined, and the basic data of the stopped wells are collected, that is, oil reservoir parameters, crude oil properties, etc. The process goes to step 103.

[0022] In step 103, the development status before the shutdown is analyzed. The selected objects are classified according to the influencing factors of single well recoverable reserves. That is, development method, reservoir type, development object, liquid retention degree, initial water cut and well type. The process goes to step 105.

[0023] In step 105, accor...

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Abstract

The invention provides a calculation method for the incontrollable recoverable reserve of a water-drive oil reservoir. As for a dead well, the calculation method for the incontrollable recoverable reserve of the water-drive oil reservoir comprises the steps that 1, an object is selected and determined, and base data of the dead well are collected; 2, analysis of the pre-production-halt exploitation situation is conducted; 3, according to the characteristics of the unit where the dead well is located, a calculation model for the recoverable reserve of a water-drive oil reservoir single well is selected; and 4, according to the calculation model, the incontrollable recoverable reserve is calculated. According to the calculation method for the incontrollable recoverable reserve of the water-drive oil reservoir, increase and decrease changes of the oil field recoverable reserve can be reflected in time, the dynamic change of the oil field recoverable reserve is evaluated objectively in time, and great significance is achieved for guiding oil field development decision-making.

Description

technical field [0001] The invention is applicable to the technical field of calibrating recoverable reserves in oil fields, and in particular relates to a calculation method for out-of-control recoverable reserves of wells that stop production and stop injection. Background technique [0002] Shengli Oilfield has many types of reservoirs, a long development history, and complex geological conditions. Due to reasons such as corrosion, aging, and formation pressure changes, a high proportion of production and injection wells have been shut down, leading to out-of-control injection-production well patterns. With the further deepening of oilfield development and the continuous extension of the production life of oil and water wells, the stop of production and injection wells will still show a trend of increasing year by year. The increase of stop production and stop injection wells will lead to imperfect secondary well pattern of some units, resulting in out of control of reser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00E21B47/003
Inventor 邴绍献苏映宏赵小军唐磊吕翔慧王华张金铸海会荣
Owner CHINA PETROLEUM & CHEM CORP
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