CN-121993115-A - Intermittent production system optimization method, system, equipment and medium

CN121993115ACN 121993115 ACN121993115 ACN 121993115ACN-121993115-A

Abstract

The intermittent production system optimization method considers transient characteristics and periodicity in the intermittent production process through analysis of production characteristics of a gas well, divides 1 period into liquid accumulation forming, liquid plug outflow, gas-liquid eruption and liquid backflow in 4 flowing stages, extracts sensitive parameters capable of reflecting each stage, establishes an intermittent production process transient mathematical model, predicts transient change rules of bottom hole pressure, oil pressure, casing pressure, gas production, liquid production, gas well accumulated gas production, accumulated water production, casing air inflow, oil pipe liquid inflow and the like along with time, realizes intermittent production process optimization, and can realize intermittent gas well yield maximization.

Inventors

FAN YU
ZHANG TING
SUN FENGJING
WANG GUO
XIONG JIE
PENG YANG

Assignees

中国石油天然气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. The batch production system optimization method is characterized by comprising the following steps of: Acquiring intermittent production dynamic data of a gas well, and dividing an intermittent production period into a liquid accumulation forming stage, a liquid plug outflow stage, a gas-liquid eruption stage and a liquid backflow stage; Fitting initial conditions based on the intermittent production dynamic data of the gas well and the historical data of the original intermittent production system of the gas well; Constructing intermittent production transient mathematical models based on the intermittent production dynamic data of the gas well and the initial conditions, wherein the intermittent production transient mathematical models comprise an intermittent production hydrops forming stage mathematical model, an intermittent production liquid plug flow out stage mathematical model, an intermittent production gas-liquid eruption stage mathematical model and an intermittent production liquid backflow stage mathematical model; solving the intermittent production transient mathematical model; And (5) setting a switching well system based on the solving result so as to realize intermittent production system optimization.
2. The intermittent production system optimization method according to claim 1, wherein the intermittent production dynamic data of the gas well comprise wellhead oil pressure, gas production, water production, wellhead casing pressure and throttle valve back pressure, a gas production graph is made based on the intermittent production dynamic data of the gas well, a change rule of the intermittent production dynamic data of the gas well is extracted according to the gas production graph, and an intermittent production period is divided into a liquid accumulation forming stage, a liquid plug flowing stage, a gas-liquid eruption stage and a liquid backflow stage.
3. The batch production system optimization method of claim 1 wherein the initial conditions include bottom hole pressure and fluid formation stage tubing fluid height.
4. The intermittent production system optimization method according to claim 1, wherein the intermittent production transient mathematical model is solved to obtain an intermittent production period, and a switching well system is formulated based on the intermittent production period.
5. A batch production regime optimization system, comprising: the data acquisition module is used for acquiring intermittent production dynamic data of the gas well and dividing an intermittent production period into a liquid accumulation forming stage, a liquid plug outflow stage, a gas-liquid eruption stage and a liquid backflow stage; the fitting module is used for fitting initial conditions based on the intermittent production dynamic data of the gas well and the historical data of the original intermittent production system of the gas well; The model construction module is used for constructing an intermittent production transient mathematical model based on the intermittent production dynamic data of the gas well and the initial conditions, wherein the intermittent production transient mathematical model comprises an intermittent production effusion forming stage mathematical model, an intermittent production liquid plug flow out stage mathematical model, an intermittent production gas-liquid eruption stage mathematical model and an intermittent production liquid backflow stage mathematical model; The model solving module is used for solving the intermittent production transient mathematical model; And the optimization module is used for formulating a switching well system based on the solving result so as to realize intermittent production system optimization.
6. The intermittent production system optimization system according to claim 5, wherein the intermittent production dynamic data of the gas well comprise wellhead oil pressure, gas production, water production, wellhead casing pressure and throttle valve back pressure, a gas production graph is made based on the intermittent production dynamic data of the gas well, a change rule of the intermittent production dynamic data of the gas well is extracted according to the gas production graph, and an intermittent production period is divided into a liquid accumulation forming stage, a liquid plug flowing stage, a gas-liquid eruption stage and a liquid backflow stage.
7. The batch production system optimizing system of claim 5 wherein the initial conditions include bottom hole pressure and fluid formation stage tubing fluid height.
8. The intermittent production schedule optimization system of claim 5, wherein the model solving module solves the intermittent production transient mathematical model to obtain an intermittent production cycle, and the optimization module formulates a switching well schedule based on the intermittent production cycle.
9. An electronic device, comprising a memory, a processor, a controller, an automatic execution unit, and a time recording device, configured to execute programs in cooperation with each other, to implement the intermittent production schedule optimization method according to any one of claims 1 to 4.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed implements the intermittent production regime optimization method of any one of claims 1 to 4.

Description

Intermittent production system optimization method, system, equipment and medium Technical Field The disclosure belongs to the technical field of oil reservoir exploitation, and particularly relates to an intermittent production system optimization method, an intermittent production system, intermittent production equipment and an intermittent production medium. Background To increase the production and recovery of intermittent production wells, only the regime of intermittent production wells is changed. At present, the optimization of the intermittent production well system is mostly fuzzing in practice, on-site statistics and experience judgment, and has larger blindness in fuzzing, still has great defects, and does not form an intermittent production theory. Most intermittent production systems depend on numerical simulation, are established through analysis of historical production systems of gas wells, and are established by establishing mathematical model analysis based on theoretical laws of pressure, water production and the like, and the numerical simulation is only based on the fact that production dynamics lack scientific and effective theory as support, meanwhile, because no reasonable and scientific mathematical model is used as a core, the on-site application effect is poor, the application range of the researched intermittent production system is limited, and the research on the intermittent production system lacks certain practicability. The current intermittent production process system cannot predict future production characteristics by using the production data of the same day, and the optimal production system is optimized. Therefore, it is urgently required to establish a transient mathematical model for intermittent production, realize the optimization of intermittent production technology and guide the efficient production of intermittent production wells. Therefore, there is a need to provide a new batch production regime optimization method, system, apparatus and medium that solves the above-mentioned technical problems. Disclosure of Invention The present disclosure aims to provide a batch production regime optimization method, system, apparatus and medium in order to solve the above problems. The technical scheme of the disclosure is as follows: A batch production regime optimization method comprising the steps of: Acquiring intermittent production dynamic data of a gas well, and dividing an intermittent production period into a liquid accumulation forming stage, a liquid plug outflow stage, a gas-liquid eruption stage and a liquid backflow stage; Fitting initial conditions based on the intermittent production dynamic data of the gas well and the historical data of the original intermittent production system of the gas well; Constructing intermittent production transient mathematical models based on the intermittent production dynamic data of the gas well and the initial conditions, wherein the intermittent production transient mathematical models comprise an intermittent production hydrops forming stage mathematical model, an intermittent production liquid plug flow out stage mathematical model, an intermittent production gas-liquid eruption stage mathematical model and an intermittent production liquid backflow stage mathematical model; solving the intermittent production transient mathematical model; And (5) setting a switching well system based on the solving result so as to realize intermittent production system optimization. The intermittent production dynamic data of the gas well comprises wellhead oil pressure, gas production, water production, wellhead casing pressure and throttle valve back pressure, a gas production graph is manufactured based on the intermittent production dynamic data of the gas well, the change rule of the intermittent production dynamic data of the gas well is extracted according to the gas production graph, and the intermittent production period is divided into a liquid accumulation forming stage, a liquid plug flow stage, a gas-liquid eruption stage and a liquid backflow stage. As a further refinement of the present disclosure, the initial conditions include bottom hole flow pressure and fluid formation stage tubing fluid formation height. As a further optimization scheme of the disclosure, solving the intermittent production transient mathematical model to obtain an intermittent production period, and formulating a switching well system based on the intermittent production period. A batch production regime optimization system comprising: the data acquisition module is used for acquiring intermittent production dynamic data of the gas well and dividing an intermittent production period into a liquid accumulation forming stage, a liquid plug outflow stage, a gas-liquid eruption stage and a liquid backflow stage; the fitting module is used for fitting initial conditions based on the intermittent production dynamic data of the gas well and the histo