CN211857471U

CN211857471U - System for automatically calculating gas reservoir formation pressure

Info

Publication number: CN211857471U
Application number: CN202020960458.2U
Authority: CN
Inventors: 甘笑非; 肖尧; 易劲; 欧家强; 袁权; 阮基富
Original assignee: China Petroleum And Natural Gas Co ltd Southwest Oil And Gas Field Branch Chuanzhong Oil And Gas Mine
Current assignee: China Petroleum And Natural Gas Co ltd Southwest Oil And Gas Field Branch Chuanzhong Oil And Gas Mine
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-11-03
Anticipated expiration: 2030-05-29

Abstract

The utility model provides an automatic calculate system of gas reservoir formation pressure specifically includes: the system comprises a server, an input module, an output module, a wellhead thermometer, a wellhead flowmeter and a wellhead pressure gauge; the server comprises a processor and a database; the system collects wellhead temperature, gas well yield data and wellhead oil pressure in a standard state; the processor comprises a first calculation module and a second calculation module, the first calculation module calculates the first gas reservoir formation pressure when the well is closed, the second calculation module calculates the second gas reservoir formation pressure when the well is opened, and the logic judgment module selects and outputs the first gas reservoir formation pressure or the second gas reservoir formation pressure as the target gas reservoir formation pressure according to a target instruction input by a user. Through the utility model provides a system can realize the calculation of gas reservoir formation pressure automatically, has extensive suitability and intellectuality, can reduce the required artifical work of calculating gas reservoir formation pressure among the prior art by a wide margin, has promoted the efficiency of gas reservoir development.

Description

System for automatically calculating gas reservoir formation pressure

Technical Field

The utility model relates to a gas reservoir exploitation technical field, concretely relates to system for automatically, calculate gas reservoir formation pressure.

Background

The formation pressure of the gas reservoir is used as the power for developing the gas reservoir, the gas production rate and the economic benefit of the gas well are determined, the change of the formation pressure is mastered at any time, and the method is very important for ensuring the production increase, the stable production and the later development and adjustment of the gas well and the gas reservoir. At present, people calculate the formation pressure of a gas reservoir and are mainly used for the purposes of well workover design, gas well productivity calculation, reserve recheck, development potential evaluation and the like. However, in the prior art, the formation pressure acquisition technology comprises two major types of measurement methods and calculation methods. The actual measurement method is most accurate but requires long-time shut-in time, the well shut-in time for a low-permeability gas reservoir even needs more than half a year, the bottom hole pressure can be stable, the measured formation pressure value can reflect the real formation pressure, and the long-time shut-in can bring economic loss to a gas well with a production task. For gas reservoirs in the middle and later periods of development, the conditions such as the inner diameter of an oil pipe, corrosion and blockage of a shaft are limited, a part of gas wells do not have the condition of lowering a pressure gauge to the middle of a production layer for pressure measurement, and production data of the gas wells are always the only calculation data source. The calculation method has wide applicability, but the gas reservoir formation pressure is gradually deduced by manually collecting complicated and complicated data on site, so that the work burden is heavy and the efficiency is low when researchers carry out well workover design and reserve recheck; meanwhile, the existing calculation method only uses gas well closing data or gas well opening data to calculate the formation pressure, the full utilization of gas well production data is not realized, and the calculation accuracy is not sufficient.

Therefore, how to realize the automatic calculation of the formation pressure of the gas reservoir with universal applicability and high calculation precision is an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a system for automatic calculation gas reservoir formation pressure can utilize gas well output data under the standard condition to judge the well head state to acquire different gas reservoir formation pressures under the well head state of difference, according to the use scene of gas reservoir formation pressure data, automatic output gas reservoir formation pressure numerical value, thereby realize the gas reservoir formation pressure automatic calculation of suitability and high computational accuracy, promoted the efficiency of gas reservoir formation pressure calculation and reduced manual operation's working strength.

The utility model discloses a following technical scheme solves above-mentioned problem:

a system for automatically calculating a pressure of a gas reservoir formation, comprising: the system comprises a server, an input module, an output module, a wellhead thermometer, a wellhead flowmeter and a wellhead pressure gauge; the server comprises a processor and a database; the wellhead thermometer, the wellhead flowmeter and the wellhead pressure gauge are all arranged at a wellhead of the gas well, connected with the server and respectively used for acquiring wellhead temperature, gas well yield data and wellhead oil pressure in a standard state; storing gas reservoir and well parameters in the database; the processor comprises a first calculation module, a second calculation module, a timer and a logic judgment module; the logic judgment module judges whether the wellhead state is open or closed according to whether the gas well yield data acquired by the wellhead flowmeter is greater than 0; the first calculation module calculates the pressure of the first gas reservoir stratum when the logic judgment module judges that the well head state is the well closing state, and stores the calculation result into the database; the second calculation module calculates the formation pressure of a second gas reservoir when the logic judgment module judges that the well opening state is well opening, and stores the calculation result into the database; the input module is used for inputting measured or preset gas reservoir and well parameters and target instructions by a user; and the logic judgment module selects and outputs the first gas reservoir formation pressure or the second gas reservoir formation pressure stored in the database as the target gas reservoir formation pressure according to a target instruction input by a user, and outputs the target gas reservoir formation pressure to the user through the output module.

Preferably, the system also comprises a safety device arranged at the wellhead, wherein the safety device acquires wellhead gas information and completes combustible gas and/or toxic gas leakage detection and alarm; the safety device is also connected with the server, receives a well shut-in command sent by the server, and executes the operations of shutting in the well and closing the system for automatically calculating the formation pressure of the gas reservoir.

Preferably, the output module comprises a user terminal that can display the target gas reservoir formation pressure.

Preferably, the input module and/or the output module are connected with the server in a wired or wireless manner.

Preferably, the frequency of data acquisition of the wellhead thermometer, the wellhead flowmeter and the wellhead pressure gauge is 1 time/day or 1 time/hour, and the timer is used for recording the data acquisition time.

The utility model has the advantages that: through setting up in the measuring instrument of gas well wellhead, combine the gas reservoir and the well parameter of prestoring, can realize the calculation of gas reservoir formation pressure automatically, have extensive suitability and intelligent, can reduce the required manual labor of calculating gas reservoir formation pressure among the prior art by a wide margin, promote the efficiency of gas reservoir development.

Drawings

Fig. 1 is a block diagram of a system for automatically calculating a formation pressure of a gas reservoir according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the sensing device in the system of the present invention installed at the wellhead.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It is to be understood that the specific embodiments described herein are merely exemplary of some of the present invention and are intended to provide those skilled in the art with a more complete and thorough understanding of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

FIG. 1 illustrates, as an example, a block diagram of a system for automatically calculating a pressure of a gas reservoir formation. A schematic diagram of the above system with the sensing device located at the wellhead is shown in fig. 2.

Referring to fig. 1, a system for automatically calculating a pressure of a gas reservoir formation, comprising: the system comprises a server 8, an input module 11, an output module 12, a wellhead thermometer 5, a wellhead flowmeter 6 and a wellhead pressure gauge 7. Wherein, well head thermometer 5, well head flowmeter 6 and well head manometer 7 all set up in the gas well head, as shown in fig. 2. The gas reservoir formation 2 is located below the surface 1 and the tubing 4 located within the casing 3 runs into the gas reservoir formation 2. And the wellhead thermometer 5, the wellhead flowmeter 6 and the wellhead pressure gauge 7 are all arranged at the tail end of the oil pipe 4 at the wellhead and are respectively used for acquiring wellhead temperature Tempt, gas well yield data Qsc in a standard state and wellhead oil pressure Pt.

The wellhead thermometer 5, the wellhead flowmeter 6 and the wellhead pressure gauge 7 are respectively connected with the server 8, collected data are transmitted to the server 8, and the collection frequency can be 1 time/day or 1 time/hour and the like. The server 8 includes a processor 9 and a database 10.

The processor 9 includes a first calculating module 901, a second calculating module 902, a timer 903 and a logic determining module 904. The logic judgment module 904 judges whether the wellhead status is open or closed according to whether the gas well production data Qsc collected by the wellhead flowmeter 6 is greater than 0. When the logic judgment module judges that the well head state is the well closing state, the first calculation module calculates the first gas reservoir formation pressure according to the well head oil pressure during the well closing state, gas reservoir temperature, average deviation coefficient of shaft gas, gas layer depth and other gas reservoir and well parameters which are acquired by a well head pressure gauge 7 and stored in the database 10, and stores the calculation result into the database 10. And when the logic judgment module judges that the well head state is well opening, the second calculation module calculates the formation pressure of a second gas reservoir according to the well head oil pressure during well opening, which is acquired by a well head pressure gauge 7, the gas well yield data Qsc acquired by a well head flowmeter 6, and gas reservoir and well parameters such as the gas reservoir temperature, the pressure-apparent pressure-deviation factor relation table, the gas layer depth and the like stored in the database 10, and stores the calculation result into the database 10. The timer 903 is used to record the time of data acquisition.

The input module 11 is used for a user to input various measured or preset gas reservoir and well parameters and target instructions. The logic judgment module 904 selects the first gas reservoir formation pressure or the second gas reservoir formation pressure stored in the output database 10 as a target gas reservoir formation pressure value according to a target instruction input by a user, and outputs the target gas reservoir formation pressure value to the user through the output module 12. The output module 12 includes a user terminal that can display the target gas reservoir formation pressure value. The input module 11 and/or the output module 12 are connected with the server 8 in a wired or wireless manner.

In another embodiment, the wellhead is further provided with a safety device 13, which can collect wellhead gas information through the safety device 13, complete combustible gas and/or toxic gas leakage detection alarm, and on the other hand, is also connected with the server 8, receives a well closing command sent by the server 8, and executes well closing and operation of closing the system for automatically calculating the formation pressure of the gas reservoir.

It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.

Claims

1. A system for automatically calculating a pressure of a gas reservoir formation, comprising: the system comprises a server, an input module, an output module, a wellhead thermometer, a wellhead flowmeter and a wellhead pressure gauge;

the server comprises a processor and a database;

the wellhead thermometer, the wellhead flowmeter and the wellhead pressure gauge are all arranged at a wellhead of the gas well, connected with the server and respectively used for acquiring wellhead temperature, gas well yield data and wellhead oil pressure in a standard state;

storing gas reservoir and well parameters in the database;

the processor comprises a first calculation module, a second calculation module, a timer and a logic judgment module;

the logic judgment module judges whether the wellhead state is open or closed according to whether the gas well yield data acquired by the wellhead flowmeter is greater than 0; the first calculation module calculates the pressure of the first gas reservoir stratum when the logic judgment module judges that the well head state is the well closing state, and stores the calculation result into the database;

the second calculation module calculates the formation pressure of a second gas reservoir when the logic judgment module judges that the well opening state is well opening, and stores the calculation result into the database;

the input module is used for inputting measured or preset gas reservoir and well parameters and target instructions by a user;

and the logic judgment module selects and outputs the first gas reservoir formation pressure or the second gas reservoir formation pressure stored in the database as the target gas reservoir formation pressure according to a target instruction input by a user, and outputs the target gas reservoir formation pressure to the user through the output module.

2. The system for automatically calculating the formation pressure of a gas reservoir according to claim 1, further comprising a safety device arranged at a wellhead, wherein the safety device collects wellhead gas information and completes a combustible gas and/or toxic gas leakage detection alarm; the safety device is also connected with the server, receives a well shut-in command sent by the server, and executes the operations of shutting in the well and closing the system for automatically calculating the formation pressure of the gas reservoir.

3. The system of claim 1, wherein the output module comprises a user terminal configured to display the target reservoir formation pressure.

4. The system of claim 1, wherein the input module and/or the output module is connected to the server via a wired or wireless connection.

5. The system of claim 1, wherein the wellhead thermometer, wellhead flowmeter and wellhead pressure gauge collect data at a frequency of 1 time/day or 1 time/hour, and wherein the timer is configured to record the time of data collection.