CN111119795A

CN111119795A - Novel gas production process

Info

Publication number: CN111119795A
Application number: CN201911249995.4A
Authority: CN
Inventors: 王春岚; 石艳娟; 柳润泽; 李勃桦; 王�琦; 王红丽; 王洋洋; 金雪峰; 付琳凯
Original assignee: Suno Technology Co Ltd
Current assignee: Suno Technology Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-05-08

Abstract

A novel gas production process method is characterized in that a shaft gas production adopts an oil pipe with a low heat transfer coefficient, the heat transfer coefficient of the oil pipe is determined by calculation through multiphase flow pipe network simulation analysis software PIPEPHASE, and the performance parameters of a heat-insulating oil pipe are as follows: simulation shows that after the heat-insulating oil pipe is applied, the pressure and the temperature generated in the gas well exploitation process are fully utilized, and the temperature reduction phenomenon caused by the reduction of the throttling pressure of a wellhead is compensated; the natural gas conveying temperature is higher than the approach temperature of forming the hydrate, and the natural gas gathering and conveying system requirement is met after the heating furnace is cancelled; the invention has the advantages that: the ground heating and alcohol injection processes of a ground wellhead and a gas gathering station are cancelled; the temperature reduction phenomenon caused by wellhead pressure reduction is compensated by utilizing the pressure and the temperature generated by the pressure and the temperature; the natural gas conveying temperature is higher than the adjacent temperature of forming hydrate; the flow and the maintenance are simple; low investment and low cost; the natural gas gathering and transportation system continuously, stably and continuously supplies gas, has less discharge of substances and low energy consumption, and has better economic and environmental benefits.

Description

Novel gas production process

Technical Field

The invention relates to the technical field of natural gas exploitation, in particular to a novel gas production process method.

Background

Along with the rapid development of economy in China and the increasing demand on energy, energy conservation and consumption reduction are particularly important in the petroleum and natural gas industry. The energy consumption of the natural gas gathering and transportation system accounts for the larger part of the energy consumption of the ground engineering of the whole gas field, and the energy conservation and consumption reduction of the natural gas gathering and transportation system directly relate to the cost investment and the economic benefit of the production of the whole gas field. The improvement of the ground gathering and transportation process mode of the natural gas is an effective way for improving the gathering and transportation efficiency of the natural gas, reducing energy consumption and realizing maximization of benefit of natural gas production.

At present, the natural gas gathering and transportation process is widely applied to the technical methods of wellhead heating throttling, wellhead alcohol injection high-pressure gathering and transportation, underground throttling and the like. The wellhead heating throttling process can realize throttling, pressure reducing and conveying of the gas well, but the energy consumption is high, and in the pressurization period in the later period of production of the gas field, the utilization rate of a heating furnace is low, and the investment in the initial development stage is high; the high-pressure gathering and transportation process for injecting methanol at the well mouth adopts high-pressure transportation, the gathering and transportation efficiency is high, but the recovery cost of alcohols is high, and the pollution is large; the underground throttling process can effectively realize a well head gas medium-low pressure gas collection mode without injecting alcohol, but the throttle in underground throttling has short effective period, is easy to damage, has high maintenance and salvage cost and influences production.

Therefore, the domestic natural gas gathering and transportation technology is comprehensively considered, the oil pipe with low heat transfer coefficient is adopted for gas production, the loss of heat in the natural gas oil pipe transportation process is reduced, and the temperature requirement before wellhead throttling is met by fully utilizing the formation temperature. The technical method can effectively reduce the production cost and the energy consumption.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a novel gas production process method.

The technical scheme of the invention is as follows: a novel gas production process method mainly comprises the following steps: the method comprises the following steps of (1) obtaining gas from a new well, a heat-insulating oil pipe with low heat transfer coefficient, a gas production tree, a wellhead restrictor and the like, wherein the oil pipe with low heat transfer coefficient is adopted for gas production from a shaft, the heat transfer coefficient of the oil pipe is determined by calculation through multiphase flow pipe network simulation analysis software PIPEPHASE, and the performance parameters of the heat-insulating oil pipe are as follows: simulation shows that after the heat-insulating oil pipe is applied, the pressure and the temperature generated in the gas well exploitation process are fully utilized, and the temperature reduction phenomenon caused by the reduction of the throttling pressure of a wellhead is compensated; meanwhile, the natural gas conveying temperature is higher than the approach temperature of forming the hydrate, and meanwhile, the requirement of a natural gas gathering and conveying system is met by verifying that the gathering and conveying process after the heating furnace is cancelled.

The invention has the beneficial effects that: by adopting the heat-insulating oil pipe with low heat transfer coefficient, the wellhead throttling without heating and alcohol injection is achieved, and the ground heating and alcohol injection processes of a ground wellhead and a gas gathering station are cancelled; the invention fully utilizes the pressure and temperature generated in the gas well exploitation process, and makes up the temperature reduction phenomenon caused by the pressure reduction of the wellhead; meanwhile, the natural gas conveying temperature is higher than the adjacent temperature of the formed hydrate; the invention has simple flow and simple maintenance; low investment, low running cost and high cost performance; by popularization and application in the gas field, the invention can realize continuous, stable and continuous gas supply of the natural gas gathering and transportation system, reduce pollutant discharge and energy consumption, and has better economic benefit and environmental protection benefit.

Detailed Description

A novel gas production process method mainly comprises the following steps: the method comprises the following steps of (1) obtaining gas from a new well, a heat-insulating oil pipe with low heat transfer coefficient, a gas production tree, a wellhead restrictor and the like, wherein the oil pipe with low heat transfer coefficient is adopted for gas production from a shaft, the heat transfer coefficient of the oil pipe is determined by calculation through multiphase flow pipe network simulation analysis software PIPEPHASE, and the performance parameters of the heat-insulating oil pipe are as follows: simulation shows that after the heat-insulating oil pipe is applied, the pressure and the temperature generated in the gas well exploitation process are fully utilized, and the temperature reduction phenomenon caused by the reduction of the throttling pressure of a wellhead is compensated; meanwhile, the natural gas conveying temperature is higher than the approach temperature of forming the hydrate, and meanwhile, the requirement of a natural gas gathering and conveying system is met by verifying that the gathering and conveying process after the heating furnace is cancelled.

Claims

1. A novel gas production process method mainly comprises the following steps: the new well, heat preservation oil pipe, gas production tree, well head choke ware etc. that heat transfer coefficient is low, its characterized in that: the shaft gas production adopts an oil pipe with low heat transfer coefficient, the heat transfer coefficient of the oil pipe is determined by calculation through multiphase flow pipe network simulation analysis software PIPEPHASE, and the performance parameters of the heat-insulating oil pipe are as follows: simulation shows that after the heat-insulating oil pipe is applied, the pressure and the temperature generated in the gas well exploitation process are fully utilized, and the temperature reduction phenomenon caused by the reduction of the throttling pressure of a wellhead is compensated; meanwhile, the natural gas conveying temperature is higher than the approach temperature of forming the hydrate, and meanwhile, the requirement of a natural gas gathering and conveying system is met by verifying that the gathering and conveying process after the heating furnace is cancelled.