Rock physics calculation method and system for saturation of natural gas hydrate in well

A calculation method and petrophysical technology, applied in the field of natural gas hydrate saturation estimation, can solve the problems of affecting the accuracy of the results, affecting and changing the sound velocity of the formation, and achieve the effect of high feasibility, high estimation accuracy, and actual production and development advancement

Pending Publication Date: 2020-12-29
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existence of hydrates will not only change the sound velocity of the formation, but also affect parameters such as formation density and consolidation coefficient. Therefore, it is not enough to estimate saturation only by formation sound velocity, which...

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
  • Rock physics calculation method and system for saturation of natural gas hydrate in well
  • Rock physics calculation method and system for saturation of natural gas hydrate in well
  • Rock physics calculation method and system for saturation of natural gas hydrate in well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0037] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, device, method or computer program product. Therefore, the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0038] According to an embodiment of the present invention, a petrophysical calculation me...

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 provides a rock physics calculation method and system for saturation of natural gas hydrate in a well. The method comprises the following steps: obtaining the porosity of a stratum in the well through calculation according to the data of a work area; obtaining the stratum optimal consolidation coefficient of the current depth point through inversion; calculating the stratum porosityand the consolidation coefficient in the well at each depth point in the well to obtain the stratum porosity and the consolidation coefficient of the whole well section; utilizing a three-phase Biot model to predict stratum longitudinal wave speed and stratum density, and calculating hydrate saturation of each depth point in the well by taking a correction coefficient as a constraint; adjusting the correction coefficient by modifying the weight factor, calculating the saturation average value of the hydrate-free horizon in the well by using the new correction coefficient as a constraint, and obtaining the weight factor of the well until the saturation average value of the hydrate-free horizon approaches 0; and recalculating the hydrate saturation of each depth point in the well by utilizing the weight factor of the well to obtain the hydrate saturation value of the whole well section.

Description

technical field [0001] The invention relates to the technical field of natural gas hydrate saturation estimation, in particular to a petrophysical calculation method and system for natural gas hydrate saturation in wells. Background technique [0002] Natural gas hydrate is referred to as "hydrate", also known as "combustible ice". It has become a hot spot in current energy research. Quantitative evaluation of gas hydrate reservoirs is the basis for hydrate development and utilization and environmental impact, and accurate prediction of gas hydrate saturation is crucial for quantitative evaluation of hydrate resources. [0003] At present, the methods used to estimate and evaluate the saturation of gas hydrate reservoirs, in areas where drilling data exist, resistivity logging and acoustic logging are effective means for evaluating gas hydrate reservoirs. From an electrical point of view, Archie's formula (Archie, 1942), two-water model, and Nidonisian formula are used to ...

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
IPC IPC(8): G06F30/20G06Q10/04G06Q50/06G06F17/11
CPCG06F17/11G06Q10/04G06Q50/06G06F30/20
Inventor 陈海峰刘迪钱忠平黄少卿杨军赵桂玲
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap