Method for preventing edge underwater invasion in SAGD development process

A development process, steam chamber technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc.

Active Publication Date: 2021-06-11
PETROCHINA CO LTD
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve at least one of the above technical problems, the present invention provides a method for preventing SAGD development process of underwater intrusion, the method optimizes the appropriate operating pressure, Prevent the phenomenon of rapid bursting of the steam chamber in a certain area due to improper operating pressure of the steam chamber

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
  • Method for preventing edge underwater invasion in SAGD development process
  • Method for preventing edge underwater invasion in SAGD development process
  • Method for preventing edge underwater invasion in SAGD development process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] This embodiment optimizes the operating pressure of the SAGD steam chamber in an edge water reservoir for a certain oil layer, and prevents the phenomenon that the steam chamber rapidly advances laterally in a certain area due to improper operating pressure of the steam chamber. Specifically include the following processes:

[0079] S100. Determine the spatial development form of the steam cavity in different development periods.

[0080] In the process of SAGD development, the development of SAGD steam chambers is different due to the influence of reservoir heterogeneity, interlayers, timing of diversion and well pattern combination. Use well temperature monitoring data and numerical simulation methods to determine the range of steam chambers for each single well, and describe the development form of SAGD steam chambers in each area of ​​the reservoir in detail, including the height of the steam chamber, the thickness of the upper remaining oil layer, and the plane dis...

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 discloses a method for preventing edge underwater invasion in an SAGD development process. According to the influence of the change of the operating pressure of a steam cavity on the expansion speed of a steam cavity and the SAGD oil production, the method for controlling the expansion speed of the steam cavity by using the pressure, promoting the uniform development of the SAGD steam cavity, ensuring the continuous rising of the SAGD oil production and improving the final recovery efficiency of an oil reservoir is provided, so that the super heavy oil reservoir with edge water development is utilized (developed) to the maximum extent, and the maximum value of petroleum which is a non-renewable resource is explored.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a method for preventing intrusion under the edge of water during the SAGD development process. Background technique [0002] Super heavy oil SAGD development technology is a cutting-edge technology for super heavy oil development. The production mechanism is to inject high-quality steam into the steam injection well, and the steam will cover the formation upward to form a steam chamber, which expands upward and sideways, and exchanges heat with the crude oil in the oil layer, and the crude oil and steam after being heated and reduced in viscosity Condensed water is released to the horizontal production well below by gravity, and the steam chamber continues to expand to occupy the volume of crude oil. This technology was invented by Dr. Butler in 1978. At present, it has been popularized and applied in some oilfields at home and abroad. Domestic Xinjiang Oilfiel...

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 & AuthorityApplications(China)
IPC IPC(8): E21B43/24
CPCE21B43/2406
Inventor葛明曦才业王中元邹兆玉海东明张甜甜韩冰李晓漫平原毓苏磊马凤刘雪梅王秀清宫宇宁
OwnerPETROCHINA CO LTD