CN-121998794-A - Method, equipment, medium and program for determining open-close well duration of intermittent gas well

CN121998794ACN 121998794 ACN121998794 ACN 121998794ACN-121998794-A

Abstract

The invention discloses a method for determining the open-close time length of an intermittent gas well, which relates to the technical field of oil and gas exploitation, and comprises the steps of obtaining first pressure of an inner sleeve of the intermittent gas well during well closing in each reference production period, pressure inflection points corresponding to the first pressure and second pressure of an oil pipe, determining a plurality of reference open-close time lengths of the intermittent gas well in the open-close period of the intermittent gas well according to the first pressure, the pressure inflection points and the second pressure, obtaining gas well flow, critical fluid carrying flow and second pressure of the sleeve of the intermittent gas well, determining a plurality of reference open-close time lengths of the intermittent gas well according to the gas well flow, the critical fluid carrying flow and the second pressure, determining the reference open-close time length of the reference production period according to the plurality of reference open-close time lengths of the reference production periods and the plurality of reference open-close time lengths of the reference production periods, and determining the target open-close time length of the intermittent gas well in the target production period according to the reference open-close time lengths of the plurality of the reference production periods, and improving the exploitation efficiency of the gas well.

Inventors

FENG RUQIANG
CAO LEI
WU XIAONI
DING WEI
HAO CHUNMING
ZHANG ZHONGKUI
GAO FEI
GUO SHAONAN
CAI CHANGMING
FENG ZHONGWEN
LI SHENGHE
SUN SHAOLIANG
LI ZHUANG
GUO TIANXING
WANG YUAN
XIA YANDONG
DENG XU
WU JIE
LI GUANGQIAN

Assignees

中国石油集团长城钻探工程有限公司
中国石油天然气集团有限公司

Dates

Publication Date: 20260508
Application Date: 20241108

Claims (10)

1. A method for determining the duration of a switching well for spacing a gas well, comprising: Acquiring a first pressure of an inner sleeve of an intermittent gas well during well closing in each reference production period, a pressure inflection point corresponding to the first pressure and a second pressure of an oil pipe, determining a plurality of reference well opening moments of the intermittent gas well according to the first pressure, the pressure inflection point and the second pressure, and Acquiring gas well flow, critical fluid carrying flow and second pressure of the casing in a well opening period of an intermittent gas well in each reference production period, and determining a plurality of reference well closing moments of the intermittent gas well according to the gas well flow, the critical fluid carrying flow and the second pressure; Determining reference switching well duration of the reference production period according to the reference well opening time and the reference well closing time of each reference production period, and determining target switching well duration of the intermittent gas well in the target production period according to the reference switching well duration of the reference production periods.
2. The method of claim 1, wherein the determining a plurality of reference open time points for the intermittent gas well based on the first pressure, the pressure inflection point, and the second pressure comprises: determining an inflection point moment corresponding to the pressure inflection point, and determining a time period with a first preset length after the inflection point moment as a well closing period to be analyzed; And determining a plurality of reference well opening moments of the intermittent well from the well closing period to be analyzed according to the first pressure and the second pressure acquired in the well closing period to be analyzed.
3. The method of claim 2, wherein the determining a plurality of reference open times for the intermittent gas well from the shut-in period to be analyzed based on the first pressure and the second pressure acquired during the shut-in period to be analyzed comprises: Determining pressure difference values corresponding to the first pressure and the second pressure acquired in the well closing period to be analyzed, determining a maximum difference value and a minimum difference value in the pressure difference values, and determining a difference value variation corresponding to the pressure difference values; And determining a plurality of reference well opening moments of the intermittent well from the well closing period to be analyzed according to the maximum difference value, the difference value variation and the minimum difference value.
4. The method of claim 1, wherein the determining a plurality of reference shut-in moments for the intermittent gas well based on the gas well flow, the critical carrier fluid flow, and the second pressure comprises: determining the moment when the gas well flow rate drops to the critical liquid carrying flow rate as critical moment, and determining the time period with the second preset length after the critical moment as a well opening period to be analyzed; and determining a plurality of reference well closing moments of the intermittent gas well according to the second pressure acquired in the well opening period to be analyzed.
5. The method of claim 4, wherein the determining a plurality of reference shut-in moments for the intermittent gas well from the second pressure acquired during the open time period to be analyzed comprises: Determining a maximum pressure value and a minimum pressure value corresponding to the second pressure acquired in the well opening period to be analyzed, and determining a pressure variation corresponding to the second pressure; and determining a plurality of reference closing moments of the intermittent gas well from a to-be-analyzed well opening period according to the minimum pressure value, the pressure variation and the maximum pressure value.
6. The method of claim 1, wherein the determining the reference switch well duration of each reference production cycle from the plurality of reference open well times and the plurality of reference shut-in times, respectively, of the reference production cycle comprises: combining each reference open time and each reference shut-in time for a single reference production cycle, respectively, to obtain a plurality of reference gas production periods; determining a period gas production of the intermittent gas well in the reference gas production period, and determining an average gas production in the reference gas production period according to the period gas production; and determining a reference switch well duration of the reference production period according to the average gas production in a plurality of reference gas production periods.
7. The method of claim 1, wherein the plurality of reference production cycles corresponding to the target production cycle is a preset number of the reference production cycles adjacent to the target production cycle in production time; the determining the target switching well duration of the intermittent gas well in the target production cycle according to the reference switching well durations of a plurality of the reference production cycles comprises the following steps: And carrying out weighted summation on the reference switch well duration of the reference production periods to obtain the target switch well duration of the intermittent gas well in the target production period, wherein the weight corresponding to the reference production period and the time interval of the reference production period and the target production period in the production time are in negative correlation.
8. An electronic device, the electronic device comprising: One or more processors; Storage means for storing one or more programs, The one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of switching a gas well of any of claims 1-7.
9. A computer readable storage medium having stored thereon computer instructions for causing a processor to perform the method of determining the open and close well duration of an intermittent well according to any one of claims 1-7.
10. A computer program product comprising computer programs/instructions which when executed by a processor implement the method of determining the open and close well duration for a gas well as claimed in any one of claims 1 to 7.

Description

Method, equipment, medium and program for determining open-close well duration of intermittent gas well Technical Field The invention relates to the technical field of oil and gas exploitation, in particular to a method, a device, electronic equipment, a storage medium and a program product for determining the switching well duration of a intermittent gas well. Background In the process of developing an oil-gas field, after the gas field is developed into the middle and later stages, the liquid carrying capacity of the gas well is reduced along with the reduction of formation pressure, and formation water and condensate cannot be effectively discharged, so that accumulated liquid in a shaft is caused, and the production effect of the gas well is seriously influenced. At this time, a mode of intermittent gas well opening is needed, when the gas well pressure and the gas production rate are reduced to a certain extent, the well is closed, the pressure is restored, and when the pressure is restored to a certain extent, the well is opened for production, and at this time, the gas well pressure can carry liquid for production. The current method for making the switching system of the intermittent open gas well is manually set in a system mode such as a timing switch, a constant voltage switch and the like, has large daily management workload, and has a development effect which is highly dependent on the professional knowledge level and management experience of related technicians such as gas production engineering, gas reservoir engineering and the like, so that the development efficiency of the gas well is lower. Disclosure of Invention The invention provides a method, a device, electronic equipment, a storage medium and a program product for determining the switching well duration of a gas well to solve the problem of low exploitation efficiency and improve the exploitation efficiency of the gas well. According to one aspect of the invention, a method for determining the switching well duration of a gas well is provided, which comprises the following steps: Acquiring a first pressure of an inner sleeve of an intermittent gas well during well closing in each reference production period, a pressure inflection point corresponding to the first pressure and a second pressure of an oil pipe, determining a plurality of reference well opening moments of the intermittent gas well according to the first pressure, the pressure inflection point and the second pressure, and Acquiring gas well flow, critical fluid carrying flow and second pressure of the casing in a well opening period of an intermittent gas well in each reference production period, and determining a plurality of reference well closing moments of the intermittent gas well according to the gas well flow, the critical fluid carrying flow and the second pressure; Determining reference switching well duration of the reference production period according to the reference well opening time and the reference well closing time of each reference production period, and determining target switching well duration of the intermittent gas well in the target production period according to the reference switching well duration of the reference production periods. According to another aspect of the present invention, there is provided a switching well duration determining apparatus for spacing a gas well, comprising: the reference well opening moment determining module is used for obtaining first pressure of an inner sleeve of the intermittent well during well closing in each reference production period, a pressure inflection point corresponding to the first pressure and second pressure of an oil pipe, and determining a plurality of reference well opening moments of the intermittent well according to the first pressure, the pressure inflection point and the second pressure; The reference well closing moment determining module is used for obtaining the gas well flow rate, the critical fluid carrying flow rate and the second pressure of the casing pipe in the well opening period of the intermittent gas well in each reference production period, and determining a plurality of reference well closing moments of the intermittent gas well according to the gas well flow rate, the critical fluid carrying flow rate and the second pressure; The target switching well duration determining module is used for determining the reference switching well duration of the reference production period according to the reference switching well durations of the reference production periods and the reference closing well moments respectively, and determining the target switching well duration of the intermittent gas well in the target production period according to the reference switching well durations of the reference production periods. According to another aspect of the present invention, there is provided an electronic apparatus including: At least one processor, and A memory communicatively coup