CN-116070078-B - Method and device for calculating leakage radius of hypotonic compact gas reservoir, electronic equipment and storage medium

CN116070078BCN 116070078 BCN116070078 BCN 116070078BCN-116070078-B

Abstract

The invention discloses a method and a device for calculating the leakage radius of a hypotonic compact gas reservoir, electronic equipment and a storage medium. The method is characterized by comprising the steps of dividing a gas-containing area controlled by a target gas well into a plurality of unit gas reservoir areas, determining geological reserves of the unit gas reservoir areas according to average original water saturation, average effective reservoir thickness, average porosity and average natural gas volume coefficient of each unit gas reservoir area in the target gas well, determining the target gas reservoir areas of the target gas well according to the dynamic reserves of the target gas well and the geological reserves of each unit gas reservoir area, and determining the gas release radius of the target gas well according to the number of the target gas reservoir areas and the preset unit gas reservoir area. The method realizes the accurate calculation of the leakage radius of the hypotonic compact gas reservoir, effectively improves the precision of the leakage radius, provides more accurate data for oil gas production, improves the production efficiency and reduces the production cost.

Inventors

JIA AILIN
LIU RUOHAN
GUO ZHI
XU TONG
FENG NAICHAO
YAN HAIJUN
WEI TIEJUN
HUANG SUQI
CHENG GANG

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230221

Claims (8)

1. A method for calculating the leakage radius of a hypotonic tight gas reservoir, comprising: dividing the gas-containing area controlled by the target gas well into a plurality of unit gas reservoir areas; determining the geological reserve of each unit gas reservoir region in the target gas well according to the average original water saturation, the average effective thickness of the reservoir, the average porosity and the average natural gas volume coefficient of the unit gas reservoir region; determining a target unit gas reservoir area of the target gas well according to the dynamic reserves of the target gas well and the geological reserves of each unit gas reservoir area; Determining the gas leakage radius of the target gas well according to the number of the target unit gas reservoir areas and the preset unit gas reservoir area; the determining the target unit gas reservoir area of the target gas well according to the dynamic reserve of the target gas well and the geological reserve of each unit gas reservoir area comprises the following steps: Accumulating the geological reserves of the unit gas reservoir area one by one according to the gas well coordinates of the target gas well and the dynamic reserves of the target gas well so as to determine the accumulated geological reserves of the target gas well; taking the unit gas reservoir area corresponding to the accumulated geological reserves as the target unit gas reservoir area of the target gas well; determining the gas release radius of the target gas well according to the number of target unit gas reservoir areas and the preset unit gas reservoir area, comprising: And determining the gas well gas leakage area of the target gas well according to the number of the target unit gas reservoir areas and the preset unit gas reservoir area, and determining the gas leakage radius of the target gas well according to the gas well gas leakage area.
2. The method of claim 1, wherein prior to determining the geological reserves of each unit gas reservoir zone in the target gas well based on the average raw water saturation, average reservoir effective thickness, average porosity, and average natural gas volume coefficient for the unit gas reservoir zone, further comprising: Acquiring gas well coordinates of a target gas well; Dividing the unit gas reservoir area according to the gas well coordinates and the preset unit gas reservoir area, and determining the average original water saturation, the average effective reservoir thickness, the average porosity and the average natural gas volume coefficient of each unit gas reservoir area.
3. The method of claim 1, wherein the accumulating method of accumulating the geological reserves of the unit gas reservoir area according to the gas well coordinates of the target gas well and the preset dynamic reserves of the target gas well, summing the geological reserves of the unit gas reservoir area one by one, to determine the accumulated geological reserves of the target gas well, comprises: taking a unit gas reservoir area corresponding to the gas well coordinates of the target gas well as an initial gas reservoir area, acquiring the unit gas reservoir area to be accumulated in an inward-outward mode, and accumulating the geological reserves of the acquired unit gas reservoir area into the geological reserves of the initial gas reservoir area; If the accumulated geological reserves are smaller than the dynamic reserves of the target gas well, returning to execute the operation of acquiring the unit gas reservoir area to be accumulated and accumulating the geological reserves of the acquired unit gas reservoir area into the geological reserves of the initial gas reservoir area; And if the accumulated geological reserve is not smaller than the dynamic reserve of the target gas well, taking the accumulated geological reserve as the accumulated geological reserve of the target gas well.
4. The method of claim 1, wherein determining a gas well let-down area of the target gas well based on the number of target unit gas reservoir areas and a preset unit gas reservoir area comprises: And calculating the total area of the unit gas reservoir area of all the target unit gas reservoir areas, and determining the total area as the gas well leakage area of the target gas well.
5. The method of claim 4, wherein the determining a target gas well run-off radius from the gas well run-off area comprises: And (3) equivalent the gas well gas leakage area to be a circular area, and determining the gas leakage radius of the target gas well according to the circular area.
6. A computing device for a hyposmosis tight gas reservoir leakage radius, comprising: the unit gas reservoir area determining module is used for dividing the gas containing area controlled by the target gas well into a plurality of unit gas reservoir areas; The geological reserve calculation module is used for determining the geological reserve of each unit gas reservoir area according to the average original water saturation, the average effective thickness of the reservoir, the average porosity and the average natural gas volume coefficient of the unit gas reservoir area in the target gas well; The target unit gas reservoir area determining module is used for determining a target unit gas reservoir area of the target gas well according to the dynamic reserve of the target gas well and the geological reserve of each unit gas reservoir area; the gas release radius determining module is used for determining the gas release radius of the target gas well according to the number of the target unit gas reservoir areas and the preset unit gas reservoir area; the target unit gas reservoir area determining module is specifically configured to: Accumulating the geological reserves of the unit gas reservoir area one by one according to the gas well coordinates of the target gas well and the dynamic reserves of the target gas well so as to determine the accumulated geological reserves of the target gas well; taking the unit gas reservoir area corresponding to the accumulated geological reserves as the target unit gas reservoir area of the target gas well; the air leakage radius determining module is specifically used for: And determining the gas well gas leakage area of the target gas well according to the number of the target unit gas reservoir areas and the preset unit gas reservoir area, and determining the gas leakage radius of the target gas well according to the gas well gas leakage area.
7. An electronic device, the electronic device comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of calculating a hypotonic tight gas reservoir leak radius of any of claims 1-5.
8. A computer readable storage medium storing computer instructions for causing a processor to perform the method of calculating the low permeability tight gas reservoir leak radius of any of claims 1-5.

Description

Method and device for calculating leakage radius of hypotonic compact gas reservoir, electronic equipment and storage medium Technical Field The invention relates to the field of gas well leakage radius calculation, in particular to a method and a device for calculating the leakage radius of a hypotonic compact gas reservoir, electronic equipment and a storage medium. Background The gas leakage radius is an important parameter for evaluating the development scale of the reservoir, determining the optimal well spacing and determining the potential area of the residual reserves, and is also an important basis for developing a gas field development scheme. Thus, the accurate calculation of the run-off radius is directly related to the production efficiency of the field. The prior art generally uses a modern yield decreasing analysis, a pressure recovery well test method and a material balance method for calculating the gas release radius, wherein the modern yield decreasing analysis is based on an unstable seepage theory, the seepage characteristics of a gas well are quantitatively analyzed by utilizing daily production dynamic data, reservoir parameters are determined, well control reserves are calculated, and then the gas release radius is calculated, the material balance method is based on the material balance and the volume method, the gas release radius is reversely calculated through a single well control reserve, the pressure recovery well test method is based on the seepage theory, a seepage mathematical model and a well test mathematical model are established for solving, and the reservoir compaction, the water retention and the pressure recovery time of a low-permeability compact gas reservoir are long, and can refer to insufficient test data. Disclosure of Invention The invention provides a method, a device, electronic equipment and a storage medium for calculating the leakage radius of a hypotonic compact gas reservoir, so as to realize the accurate calculation of the leakage radius of the hypotonic compact gas reservoir. According to one aspect of the invention, there is provided a method for calculating the leakage radius of a hypotonic tight gas reservoir, comprising: dividing the gas-containing area controlled by the target gas well into a plurality of unit gas reservoir areas; determining the geological reserve of each unit gas reservoir region in the target gas well according to the average original water saturation, the average effective thickness of the reservoir, the average porosity and the average natural gas volume coefficient of the unit gas reservoir region; Determining a target gas reservoir zone of the target gas well according to the dynamic reserves of the target gas well and the geological reserves of each unit gas reservoir zone; and determining the gas leakage radius of the target gas well according to the number of the target gas reservoir areas and the preset unit gas reservoir area. According to another aspect of the present invention, there is provided a calculation apparatus of a low permeability tight gas reservoir leakage radius, comprising: the unit gas reservoir area determining module is used for dividing the gas containing area controlled by the target gas well into a plurality of unit gas reservoir areas; The geological reserve calculation module is used for determining the geological reserve of each unit gas reservoir area according to the average original water saturation, the average effective thickness of the reservoir, the average porosity and the average natural gas volume coefficient of the unit gas reservoir area in the target gas well; A target unit gas reservoir zone determination module configured to determine a target gas reservoir zone of the target gas well based on the mobile reserves of the target gas well and the geological reserves of each of the unit gas reservoir zones; And the gas release radius determining module is used for determining the gas release radius of the target gas well according to the number of the target gas reservoir areas and the preset unit gas reservoir area. According to another aspect of the present invention, there is provided an electronic apparatus including: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of calculating a low permeability tight reservoir leakage radius according to any of the embodiments of the present invention. According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to perform the method for calculating a low permeability tight gas reservoir leakage radius according to any of the embodiments of the present invention. According to the technical scheme, the gas containing area controlled by the target gas well is