Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Water production gas well productivity prediction method

A prediction method and technology of well productivity, applied in the direction of prediction, instrumentation, data processing applications, etc., can solve the problems of not carefully considering the water-gas ratio, the deviation between prediction and actual productivity, etc.

Inactive Publication Date: 2015-04-08
DAGANG OIL FIELD OF CNPC
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above prediction methods, the productivity prediction method of seepage theory has a solid theoretical foundation. Its model is derived based on the fluid seepage theory and fully considers factors such as fluid properties, but it does not carefully consider the influence of water-air ratio, which often leads to predictions. There is a large deviation from the actual production capacity, and the prediction accuracy needs to be further improved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Water production gas well productivity prediction method
  • Water production gas well productivity prediction method
  • Water production gas well productivity prediction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The method for calculating the productivity of a water-producing gas well according to the present invention is described below through the productivity change before and after water production of a certain gas well in a gas field. The method mainly includes the following steps:

[0056] Well W1 is a typical condensate gas well with edge water. It was officially put into production in June 1999. The production layer is in the Ordovician. After water breakthrough in September 2001, the water-gas ratio gradually increased to 5m. 3 / 10 4 m 3 , the daily production of gas and oil decreased significantly.

[0057] According to the well test analysis, the skin coefficient of Well W1 is 1.2 when no water is produced, the supply radius of the gas well is 569 meters, and the wellbore radius is 0.102 meters. See Table 1 for PVT parameters and Table 2 for phase permeability data. According to the back pressure well test data, the binomial productivity equation of Well W1 when t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a water production gas well productivity prediction method. The prediction method comprises the steps that a change relation between water-gas ratio of a water production gas well in production and water saturation near the well bottom is established, then gas phase effective permeability under different water saturations is confirmed via a phase permeability curve, and binomial productivity equation coefficients after water breakthrough of the gas well are modified so that the modified binomial productivity equation under different water-gas ratios is obtained. The prediction method is simple in computation and consistent with the actual situation so as to effectively guide gas field development further.

Description

technical field [0001] The invention belongs to the technical field of oil productivity prediction, in particular, the invention relates to a method for predicting the productivity of a water-producing gas well. Background technique [0002] Gas well productivity evaluation is a very important task in gas reservoir engineering research, and it is an important basis for the preparation of gas field development planning and deployment, development plan design, development dynamic analysis, gas well production allocation and development plan adjustment. [0003] As early as the 1920s, Pierce and Rawlinest of the US Bureau of Mines proposed the conventional back pressure well test method to determine the productivity of gas wells, which has been widely used around the world. In 1955, Cullendert proposed the isochronous well test method for low-permeability gas reservoirs, which greatly improved the efficiency of gas reservoir productivity testing. In 1959, Katzt et al. The test...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 杨树合王连敏石占中余贝贝马小明董萍梁锋
Owner DAGANG OIL FIELD OF CNPC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com