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A method for measuring the expansion speed of horizontal well sagd steam chamber

A technology of expanding speed and steam chamber, which is applied in earthwork drilling, wellbore/well components, special data processing applications, etc.

Active Publication Date: 2018-06-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of existing methods for calculating steam chamber expansion velocity, the present invention provides a method for measuring the expansion velocity of horizontal well SAGD steam chamber

Method used

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  • A method for measuring the expansion speed of horizontal well sagd steam chamber
  • A method for measuring the expansion speed of horizontal well sagd steam chamber
  • A method for measuring the expansion speed of horizontal well sagd steam chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Taking a steam injection production project of a horizontal well group in a certain well area as an example, the vertical temperature distribution at a distance of 13.9 meters from the horizontal injection well can be detected through the corresponding observation well. The temperature of the steam chamber is set at 250°C, the original temperature of the reservoir is 15°C, and the depth of the production well is 350 meters.

[0096] According to the observation well data, select the data in the following table (three time nodes, six monitoring point data for each time node):

[0097] Table 1 Observation well depth-temperature data

[0098]

[0099] (1) Physical parameters

[0100] The oil layer corresponding to the horizontal well group has a porosity of 29.7%, a permeability of 1078.1mD, and an oil saturation of 70%. The physical properties of crude oil and rock are shown in Table 2.

[0101] Table 2 Observation well depth-temperature data

[0102]

[0103] ...

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Abstract

The invention relates to a method for measuring an SAGD steam chamber expansion speed of a horizontal well. Based on a certain assumed condition, a steam chamber expansion theory and a heat transfer and conduction differential equation, a steam chamber outer edge temperature distribution function and a steam chamber front edge expansion speed prediction model are derived. The steam chamber edge inclination angles and expansion speeds of a horizontal well group at different moments are measured in combination with field detection data according to a mathematic model. According to the method, a monitoring well can be directly adopted for monitoring temperature data and measuring the steam chamber expansion speed; and compared with an existing method for predicting the steam chamber expansion speed, the tedious process and the long consumed time of the existing method are avoided, the manpower, material resources and financial resources are saved, and an expansion speed value is quickly and accurately obtained.

Description

technical field [0001] The invention relates to a method for measuring the expansion speed of a SAGD steam chamber in a horizontal well, belonging to the technical field of oil and gas field development engineering. Background technique [0002] With the maturity of crude oil production technology, the development technology of heavy oil and super-heavy oil reservoirs has been paid more and more attention. Compared with conventional oil reservoirs, crude oil in heavy oil reservoirs has higher viscosity and poorer fluidity, and it is difficult for conventional oil recovery techniques to achieve better oil recovery results. my country is rich in heavy oil and super heavy oil resources, the main oil areas are: Karamay oil area, Liaohe oil area, Shengli oil area, Tarim oil area, etc. At present, steam-assisted gravity drainage (SAGD) technology is a relatively cutting-edge thermal oil recovery technology. Dr. Butler first analyzed and studied the principle of salt recovery by w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50E21B43/24
CPCE21B43/2406G06F30/20
Inventor 李兆敏武守亚王宏远鹿腾杨建平魏耀王诗中
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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