New method for calculating layered recoverable reserves of combined production well

A reserve calculation and new method technology, applied in calculation, earthwork drilling, wellbore/well components, etc.
CN114881383APending Publication Date: 2022-08-09CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2022-08-09

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Abstract

The invention provides a new method for calculating layered recoverable reserves of a combined production well, which comprises the following steps of: 1, determining single-production accumulated oil, final production and declining rate of a 1 # layer according to development data such as daily or monthly oil production of a single well; step 2, calculating recoverable reserves of a 1 # layer; 3, determining the commingling production accumulated oil, final production and declining rate of the 2 # layer; step 4, calculating recoverable reserves of the 2 # layer; 5, repeating the steps 3 and 4, and calculating recoverable reserves of other layers; and step 6, calculating the recoverable reserves of the last layer. The application range of the new method for calculating the layered recoverable reserves of the combined production well can cover all oil reservoir types and production scales, meanwhile, the closeness of data and the rationality of evaluation results are guaranteed, and a rapid and effective technical means is provided for evaluation of the small-layer recoverable reserves.
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Description

technical field

[0001] The invention relates to the technical field of oil recoverable reserves evaluation, in particular to a new method for calculating the recoverable reserves of commingled oil wells in layers. Background technique

[0002] Recoverable reserves are the basis for the sustainable development of oilfields and the core of the development work of oil companies. The proven petroleum reservoirs in China are dominated by continental deposits, and most of the oil and gas reservoirs are multi-layered, with many oil-bearing layers and thin single-layer thicknesses. In the process of oil and gas reserves development, the phenomenon of layer-by-layer hole filling and commingled production is very common. As a result, the development time of each sublayer overlaps, the development data cannot be accurately divided, and finally the recoverable reserves of each sublayer are difficult to calculate, which causes great difficulties in analyzing the development status of th...

Claims

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