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Calculation method of radial composite oil gas reservoir test detection radius

A technology of oil and gas reservoirs and calculation methods, which is applied in the calculation field of radial compound oil and gas reservoir test detection radius, can solve the problem of no detection radius, etc., and achieve high accuracy, simple method, and complete test interpretation work Effect

Active Publication Date: 2018-05-04
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

At present, for radial composite oil and gas reservoirs, the analysis and interpretation method is to obtain the composite radius, but there is no effective calculation method for the detection radius

Method used

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  • Calculation method of radial composite oil gas reservoir test detection radius
  • Calculation method of radial composite oil gas reservoir test detection radius
  • Calculation method of radial composite oil gas reservoir test detection radius

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0016] The calculation method for the detection radius of the radial composite oil and gas reservoir test of the present invention comprises the following steps:

[0017] Step 1, according to the basic data provided by the site, use the dimensionless pressure derivative in the radial flow stage to judge the composite radius detection time;

[0018] Step 2, using the test radius calculation formula to calculate the composite radius distance;

[0019] Step 3: Starting from the compound radius, divide the area outside the compound radius step by step in the form of concentric circles, differentiate the time unit and the corresponding permeability, and obtain the differential detection distance under the condition of the permeability in the differential time period ;

[0020] Step 4: sum the distances obtained in steps 1 and 2 to obtain the detect...

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Abstract

The invention discloses a calculation method of radial composite oil gas reservoir test detection radius. The calculation method includes: according to basic data provided on site, judging composite radio test time by the aid of dimensionless pressure derivatives at the radial flow stage; calculating composite radial distance by the aid of a test radius calculation formula; partitioning the regionbeyond the composite radius by starting from the composite radius in a concentric circle manner by degrees, and subjecting time units and corresponding permeabilities to differentiation to acquire differential time period and differential detection distance under the permeabilities; summing the acquired distance to acquire the radial composite oil gas reservoir test detection radius. With the method of partitioning time and superposing the detection distance under different permeabilities, the radial composite oil gas reservoir test detection radius is calculated, the problem that the radialcomposite oil gas reservoir test detection radius cannot be calculated and explained is solved, and the calculation method is applied to explanation of radial composite oil gas reservoir tests.

Description

technical field [0001] The invention relates to the technical fields of oil and gas field development and oil and gas exploration, in particular to an oil and gas well test data interpretation technology, and in particular to a calculation method for radial compound oil and gas reservoir test and detection radius. Background technique [0002] In the process of oil and gas well testing, the detection radius is an important interpretation parameter, especially for the calculation of the range affected by the test and the controlled reserves of a single well. At present, for radial composite oil and gas reservoirs, the analysis and interpretation method is to obtain the composite radius, but there is no effective calculation method for the detection radius. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a calculation method capable of accurately calculating the detection radius of the radial composite oil and gas ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B49/08
CPCE21B49/00E21B49/087
Inventor 郑立军徐克彬甘惠娟刘朝武张灵宫航白田增夏克文王中泽穆海林陈艳辉杜鑫芳曾子轩提云李静宇蒋婉雪
Owner BC P INC CHINA NAT PETROLEUM CORP
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