HYDRATE CORE DRILLING TESTS
The ''Methane Hydrate Production from Alaskan Permafrost'' project is a three-year endeavor being conducted by Maurer Technology Inc. (MTI), Noble, and Anadarko Petroleum, in partnership with the U.S. DOE National Energy Technology Laboratory (NETL). The project's goal is to...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Report |
Language: | English |
Published: |
Maurer Technology Inc. (United States)
2002
|
Subjects: | |
Online Access: | https://doi.org/10.2172/811812 https://digital.library.unt.edu/ark:/67531/metadc740813/ |
id |
ftunivnotexas:info:ark/67531/metadc740813 |
---|---|
record_format |
openpolar |
spelling |
ftunivnotexas:info:ark/67531/metadc740813 2023-05-15T15:19:46+02:00 HYDRATE CORE DRILLING TESTS Cohen, John H. Williams, Thomas E. Kadaster, Ali G. Liddell, Bill V. United States 2002-11-01 61 pages Text https://doi.org/10.2172/811812 https://digital.library.unt.edu/ark:/67531/metadc740813/ English eng Maurer Technology Inc. (United States) grantno: FC26-01NT41331 doi:10.2172/811812 osti: 811812 https://digital.library.unt.edu/ark:/67531/metadc740813/ ark: ark:/67531/metadc740813 Other Information: PBD: 1 Nov 2002 Methane 02 Petroleum Sand Hydrates Drilling Equipment Petroleum Drilling Fluids Production Deposition Drilling Design Mixtures 03 Natural Gas Viscosity Permafrost Core Catchers Report 2002 ftunivnotexas https://doi.org/10.2172/811812 2019-07-06T22:08:18Z The ''Methane Hydrate Production from Alaskan Permafrost'' project is a three-year endeavor being conducted by Maurer Technology Inc. (MTI), Noble, and Anadarko Petroleum, in partnership with the U.S. DOE National Energy Technology Laboratory (NETL). The project's goal is to build on previous and ongoing R&D in the area of onshore hydrate deposition. The project team plans to design and implement a program to safely and economically drill, core and produce gas from arctic hydrates. The current work scope includes drilling and coring one well on Anadarko leases in FY 2003 during the winter drilling season. A specially built on-site core analysis laboratory will be used to determine some of the physical characteristics of the hydrates and surrounding rock. Prior to going to the field, the project team designed and conducted a controlled series of coring tests for simulating coring of hydrate formations. A variety of equipment and procedures were tested and modified to develop a practical solution for this special application. This Topical Report summarizes these coring tests. A special facility was designed and installed at MTI's Drilling Research Center (DRC) in Houston and used to conduct coring tests. Equipment and procedures were tested by cutting cores from frozen mixtures of sand and water supported by casing and designed to simulate hydrate formations. Tests were conducted with chilled drilling fluids. Tests showed that frozen core can be washed out and reduced in size by the action of the drilling fluid. Washing of the core by the drilling fluid caused a reduction in core diameter, making core recovery very difficult (if not impossible). One successful solution was to drill the last 6 inches of core dry (without fluid circulation). These tests demonstrated that it will be difficult to capture core when drilling in permafrost or hydrates without implementing certain safeguards. Among the coring tests was a simulated hydrate formation comprised of coarse, large-grain sand in ice. Results with this core showed that the viscosity of the drilling fluid must also be carefully controlled. When coarse sand was being cored, the core barrel became stuck because the drilling fluid was not viscous enough to completely remove the large grains of sand. These tests were very valuable to the project by showing the difficulties in coring permafrost or hydrates in a laboratory environment (as opposed to a field environment where drilling costs are much higher and the potential loss of equipment greater). Among the conclusions reached from these simulated hydrate coring tests are the following: Frozen hydrate core samples can be recovered successfully; A spring-finger core catcher works best for catching hydrate cores; Drilling fluid can erode the core and reduces its diameter, making it more difficult to capture the core; Mud must be designed with proper viscosity to lift larger cuttings; and The bottom 6 inches of core may need to be drilled dry to capture the core successfully. Report Arctic Ice Methane hydrate permafrost University of North Texas: UNT Digital Library Arctic |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Methane 02 Petroleum Sand Hydrates Drilling Equipment Petroleum Drilling Fluids Production Deposition Drilling Design Mixtures 03 Natural Gas Viscosity Permafrost Core Catchers |
spellingShingle |
Methane 02 Petroleum Sand Hydrates Drilling Equipment Petroleum Drilling Fluids Production Deposition Drilling Design Mixtures 03 Natural Gas Viscosity Permafrost Core Catchers Cohen, John H. Williams, Thomas E. Kadaster, Ali G. Liddell, Bill V. HYDRATE CORE DRILLING TESTS |
topic_facet |
Methane 02 Petroleum Sand Hydrates Drilling Equipment Petroleum Drilling Fluids Production Deposition Drilling Design Mixtures 03 Natural Gas Viscosity Permafrost Core Catchers |
description |
The ''Methane Hydrate Production from Alaskan Permafrost'' project is a three-year endeavor being conducted by Maurer Technology Inc. (MTI), Noble, and Anadarko Petroleum, in partnership with the U.S. DOE National Energy Technology Laboratory (NETL). The project's goal is to build on previous and ongoing R&D in the area of onshore hydrate deposition. The project team plans to design and implement a program to safely and economically drill, core and produce gas from arctic hydrates. The current work scope includes drilling and coring one well on Anadarko leases in FY 2003 during the winter drilling season. A specially built on-site core analysis laboratory will be used to determine some of the physical characteristics of the hydrates and surrounding rock. Prior to going to the field, the project team designed and conducted a controlled series of coring tests for simulating coring of hydrate formations. A variety of equipment and procedures were tested and modified to develop a practical solution for this special application. This Topical Report summarizes these coring tests. A special facility was designed and installed at MTI's Drilling Research Center (DRC) in Houston and used to conduct coring tests. Equipment and procedures were tested by cutting cores from frozen mixtures of sand and water supported by casing and designed to simulate hydrate formations. Tests were conducted with chilled drilling fluids. Tests showed that frozen core can be washed out and reduced in size by the action of the drilling fluid. Washing of the core by the drilling fluid caused a reduction in core diameter, making core recovery very difficult (if not impossible). One successful solution was to drill the last 6 inches of core dry (without fluid circulation). These tests demonstrated that it will be difficult to capture core when drilling in permafrost or hydrates without implementing certain safeguards. Among the coring tests was a simulated hydrate formation comprised of coarse, large-grain sand in ice. Results with this core showed that the viscosity of the drilling fluid must also be carefully controlled. When coarse sand was being cored, the core barrel became stuck because the drilling fluid was not viscous enough to completely remove the large grains of sand. These tests were very valuable to the project by showing the difficulties in coring permafrost or hydrates in a laboratory environment (as opposed to a field environment where drilling costs are much higher and the potential loss of equipment greater). Among the conclusions reached from these simulated hydrate coring tests are the following: Frozen hydrate core samples can be recovered successfully; A spring-finger core catcher works best for catching hydrate cores; Drilling fluid can erode the core and reduces its diameter, making it more difficult to capture the core; Mud must be designed with proper viscosity to lift larger cuttings; and The bottom 6 inches of core may need to be drilled dry to capture the core successfully. |
author2 |
United States |
format |
Report |
author |
Cohen, John H. Williams, Thomas E. Kadaster, Ali G. Liddell, Bill V. |
author_facet |
Cohen, John H. Williams, Thomas E. Kadaster, Ali G. Liddell, Bill V. |
author_sort |
Cohen, John H. |
title |
HYDRATE CORE DRILLING TESTS |
title_short |
HYDRATE CORE DRILLING TESTS |
title_full |
HYDRATE CORE DRILLING TESTS |
title_fullStr |
HYDRATE CORE DRILLING TESTS |
title_full_unstemmed |
HYDRATE CORE DRILLING TESTS |
title_sort |
hydrate core drilling tests |
publisher |
Maurer Technology Inc. (United States) |
publishDate |
2002 |
url |
https://doi.org/10.2172/811812 https://digital.library.unt.edu/ark:/67531/metadc740813/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice Methane hydrate permafrost |
genre_facet |
Arctic Ice Methane hydrate permafrost |
op_source |
Other Information: PBD: 1 Nov 2002 |
op_relation |
grantno: FC26-01NT41331 doi:10.2172/811812 osti: 811812 https://digital.library.unt.edu/ark:/67531/metadc740813/ ark: ark:/67531/metadc740813 |
op_doi |
https://doi.org/10.2172/811812 |
_version_ |
1766349976555749376 |