Unlock instant, AI-driven research and patent intelligence for your innovation.

Systems and Methods for Draw Down Improvement in Wellbores

a wellbore and wellbore technology, applied in the field of systems and methods for improving the draw down of wellbores, can solve problems such as plugging and erosion or wear within the wellbor

Inactive Publication Date: 2021-03-25
LYTT LTD
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a method and system for determining an operating envelope for a wellbore, which serves as a boundary for the force on the production face of the wellbore during a production of fluids from the wellbore. This operating envelope is determined based on the correlation between the force on the production face of the wellbore and sand ingress, sand transport, or both. By maintaining the production rate within the operating envelope, the invention can effectively prevent sand ingress while still increasing the production rate. This invention helps to improve the stability of production from the wellbore and reduces the risk of damage to equipment and wellbore.

Problems solved by technology

The sand may cause plugging and erosion or wear within the well.

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
  • Systems and Methods for Draw Down Improvement in Wellbores
  • Systems and Methods for Draw Down Improvement in Wellbores
  • Systems and Methods for Draw Down Improvement in Wellbores

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0155]In a first embodiment, a method for determining an operating envelope for a wellbore comprises: receiving an indication of sand ingress into the wellbore from at least one production zone, sand transport along the wellbore, or both while producing one or more fluids from the wellbore from the at least one production zone; correlating a force on a production face of the at least one production zone of the wellbore with the sand ingress, the sand transport, or both; and determining an operating envelope based on the correlating, wherein the operating envelope defines a boundary for the force on the production face of the at least one production zone of the wellbore during a production of the one or more fluids from the at least one production zone.

[0156]A second embodiment can include the method of the first embodiment, wherein the force on the production face of the at least one production zone of the wellbore is further correlated with a production rate of the one or more flui...

ninth embodiment

[0184]A thirtieth embodiment can include the system of the twenty ninth embodiment, wherein the processor is configured to execute the analysis program to control the production rate of the one or more fluids at a maximum production rate of the one or more fluids within the operating envelope.

[0185]A thirty first embodiment can include the system of any one of the twentieth to thirtieth embodiments, wherein the processor is further configured to execute the analysis program to generate a series of control signals configured to: decrease a pressure within the wellbore to increase the force on a production face of the at least one production zone above the operating envelope, wherein the production rate of the one or more fluids increases based on decreasing of the pressure, and wherein at least a portion of sand accumulated within the wellbore is removed based on the increase in the production rate; and increase the pressure within the wellbore after at least the portion of the sand ...

second embodiment

[0186]In a thirty second embodiment, a method of controlling a drawdown pressure in a wellbore comprises: producing one or more fluids from a wellbore at a first production rate; increasing a production of the one or more fluids from the first production rate to a second production rate, wherein the first production rate is less than the second production rate, wherein the production rate increase is maintained within an operating envelope, wherein the operating envelope defines a boundary for a rate of pressure change during a production of the one or more fluids from the wellbore; and limiting sand ingress into the wellbore during the pressure increase based on maintaining the rate of pressure change within the operating envelope.

[0187]A thirty third embodiment can include the method of the thirty second embodiment, wherein the boundary for the rate of pressure change is a function of an absolute pressure within the wellbore.

[0188]A thirty fourth embodiment can include the method ...

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

A method for determining an operating envelope for a wellbore includes receiving an indication of sand ingress into the wellbore from at least one production zone, sand transport along the wellbore, or both while producing one or more fluids from the wellbore from the at least one production zone, correlating a force on a production face of the at least one production zone of the wellbore with the sand ingress, the sand transport, or both, and determining an operating envelope based on the correlating. The operating envelope defines a boundary for the force on the production face of the at least one production zone of the wellbore during a production of the one or more fluids from the at least one production zone.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of and priority to International Application No. PCT / EP2019 / 075385 filed Sep. 20, 2019 with the EPO Receiving Office and entitled “Systems and Methods for Draw Down Improvement in Wellbores,” which is hereby incorporated herein by reference in its entirety for all purposes.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.BACKGROUND[0003]To obtain hydrocarbons from subterranean formations, wellbores are drilled from the surface to access the hydrocarbon-bearing formation. After drilling a wellbore to the desired depth, a production string is installed in the wellbore to produce the hydrocarbons from one or more production zones of the formation to the surface. In some wellbores, fine particulate matter (which is generally referred to herein as “sand”) may be produced along with other fluids (e.g., hydrocarbon liquids, gas, water, etc.). The sand may cause plugging and e...

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): E21B47/107E21B43/12E21B47/06
CPCE21B47/107E21B47/06E21B43/12E21B49/008E21B2200/20
Inventor THIRUVENKATANATHAN, PRADYUMNA
Owner LYTT LTD