How to Increase the Reliability of Your Open Hole Drill Stem Test Analyses

10.2118/95-36 ◽  
1995 ◽  
Author(s):  
R. Grant ◽  
H. Gill
Keyword(s):  
Drill Stem ◽  
Open Hole

YARDIE EAST—1: A DIRECTIONALLY DRILLED WILDCAT

1983 ◽  
Vol 23 (1) ◽  
pp. 103
Author(s):  
G. F. Tomlin ◽  
H. W. White ◽  
R. Dumbrell
Keyword(s):  
Critical Analysis ◽  
Modern Technology ◽  
Sensitive Area ◽  
Offshore Structure ◽  
Oil Drilling ◽  
Drilling Rig ◽  
Drill Stem ◽  
Open Hole ◽  
The Indian Ocean ◽  
Environmentally Sensitive

Under the terms of a farmout agreement a well to 4200 metres true vertical depth was required to test an offshore structure in the Indian Ocean 3.4 kilometres from the Cape Range landfall. Western Australia.Due to the structure being located in an offshore environmentally sensitive area and the proximity of the structure to the Ningaloo Reef, the decision was taken by the consortium to drill a directionally controlled wildcat well, Yardie East-1, from the nearest landfall point, in a designated National Park.With the co-operation of the regulatory authorities a drilling plan was approved which entailed a critical analysis and modifications to the drilling rig, Rig No. 15 contracted from Oil Drilling and Exploration Limited, to satisfy the loads associated with a directionally drilled well to a worst condition programmed measured depth of 5650 m.Utilising modern technology the wildcat well was drilled to the target at the top of the structure at 5110 m at a penetration angle of 50° and an azimuth of 308° in 142 days from spud.Earning conditions were satisfied with an eventual total drilled depth of 5593 m. Logging and an open hole drill stem test were conducted prior to abandoning the well 186 days after spud.It is believed that Yardie East-1 is the longest well, in terms of measured depth, drilled onshore or offshore Australia.

Development of Downhole Tools for Stratified Testing in Oil and Gas Open-Hole Wells

2011 ◽  
Vol 422 ◽  
pp. 614-618 ◽  
Author(s):  
Quan Min Zhao ◽  
Jian Chun Fan ◽  
De Yan ◽  
Rui Rui Tian ◽  
Bo Zhou ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Field Application ◽  
Technological Equipment ◽  
Construction Technology ◽  
Oil And Gas Exploration ◽  
Drill Stem ◽  
Testing Technology ◽  
Open Hole ◽  
Exploratory Wells ◽  
Working Efficiency

In view of the problems that multilayer stratified sampling and acidification-testing operations cannot be done in drill stem multilayer testing for open-hole wells, downhole tools for acidizing and testing were developed, stratified testing and sampling string, acidizing-testing string and their construction technology in open-hole wells were also studied. A set of technologies and equipment were provided for open-hole testing in exploratory wells. Field application shows the studying of drill stem stratified testing technology and related technological equipment can solve the problems existing in production, raise the working efficiency of open-hole testing, accelerate the speed of oil and gas exploration, and reduce the operating expenses.

ELECTRIC LOGGING APPLIED TO GROUND‐WATER EXPLORATION

Geophysics ◽  
1951 ◽  
Vol 16 (1) ◽  
pp. 115-139 ◽  
Author(s):  
P. H. Jones ◽  
T. B. Buford
Keyword(s):  
Ground Water ◽  
Gulf Coast ◽  
Salt Water ◽  
Drill Stem ◽  
Quality Of Water ◽  
Water Well ◽  
Open Hole ◽  
Log Interpretation

A method is described for the determination of the quality of ground water in granular aquifers penetrated by rotary‐drilled holes electrically logged. Conventional techniques of electric‐log interpretation, to determine true bed resistivity from apparent resistivity values, are briefly described; and a method for converting water‐resistivity values into hypothetical chemical analyses is explained. The objective of the method is to narrow the limits of error in quality‐of‐water estimates based upon electric logs. Water‐well contractors are fully aware of the risks attendant in making drill‐stem tests in open hole, which is the method now employed to obtain representative samples of formation water. Packer failure results in contaminated samples; hole collapse may mean loss of drill stem, screen, and the hole. In the Gulf Coast where water‐well tests range in depth from 100 to 3,000 feet, methods that will eliminate at least a part of the need for drill‐stem tests deserve consideration. The paper deals also with methods of determining formation porosity in situ, which is an important factor in salt‐water‐encroachment problems.

Strength and mechanical response of C/C composite open-hole and bolted plates

2017 ◽  
Vol 59 (9) ◽  
pp. 774-778
Author(s):  
Zhiyong Tan ◽  
Weili Dong ◽  
Jie Mei ◽  
Jialin Liu ◽  
Jiayi Liu ◽  
...  
Keyword(s):  
Mechanical Response ◽  
Open Hole

Effects of hygrothermal and thermal-oxidative ageing on the open-hole properties of T800/high-temperature epoxy resin composites with different hole shapes

2019 ◽  
Vol 32 (3) ◽  
pp. 306-315 ◽  
Author(s):  
Liang Xu ◽  
Yi He ◽  
Shaohua Ma ◽  
Li Hui
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Epoxy Resin ◽  
Failure Modes ◽  
Resin Composites ◽  
Physical Ageing ◽  
Hygrothermal Ageing ◽  
Open Hole ◽  
Epoxy Resin Composites ◽  
Oxidative Ageing

T800/high-temperature epoxy resin composites with different hole shapes were subjected to hygrothermal ageing and thermal-oxidative ageing, and the effects of these different ageing methods on the open-hole properties of the composites were investigated, including analyses of the mass changes, surface topography changes (before and after ageing), fracture morphologies, open-hole compressive performance, dynamic mechanical properties and infrared spectrum. The results showed that only physical ageing occurred under hygrothermal ageing (70°C and 85% relative humidity), and the equilibrium moisture absorption rate was only approximately 0.72%. In contrast, under thermal-oxidative ageing at 190°C, both physical ageing and chemical ageing occurred. After ageing, the open-hole compressive strength of the composite laminates with different hole shapes decreased significantly, but the open-hole compressive strength after thermal-oxidative ageing was greater than that after hygrothermal ageing. Among the aged and unaged laminates, the laminates with round holes exhibited the largest open-hole compressive strength, followed by those with the elliptical holes, square holes and diamond holes. The failure modes of the laminates were all through-hole failures. The unaged samples had a glass transition temperature ( T g) of 226°C, whereas the T g of the samples after hygrothermal ageing was 208°C, which is 18°C less than that of the unaged samples, and the T g of the samples after thermal-oxidative ageing was 253°C, which is 27°C greater than that of the unaged samples.

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