scholarly journals Environmental Assessment: Geothermal Energy Geopressure Subprogram. Gulf Coast Well Drilling and Testing Activity (Frio, Wilcox, and Tuscaloosa Formations, Texas and Louisiana)

1981 ◽  
Author(s):  
Keyword(s):  
Environmental Assessment ◽  
Geothermal Energy ◽  
Gulf Coast ◽  
Well Drilling

Oil and Gas Drilling Optimization Technologies Applied Successfully to Unconventional Geothermal Well Drilling

2021 ◽  
Author(s):  
Junichi Sugiura ◽  
Ramon Lopez ◽  
Francisco Borjas ◽  
Steve Jones ◽  
John McLennan ◽  
...  
Keyword(s):  
Geothermal Energy ◽  
Oil And Gas ◽  
Optimization Techniques ◽  
Geothermal System ◽  
Well Drilling ◽  
Geothermal Well ◽  
Gas Drilling ◽  
Drilling Tools ◽  
Drilling Optimization ◽  
Oil And Gas Drilling

Abstract Geothermal energy is used in more than 20 countries worldwide and is a clean, reliable, and relatively available energy source. Nevertheless, to make geothermal energy available anywhere in the world, technical and economic challenges need to be addressed. Drilling especially is a technical challenge and comprises a significant part of the geothermal development cost. An enhanced geothermal system (EGS) is a commercially viable thermal reservoir where two wells are interconnected by some form of hydraulic stimulation. In a commercial setting, fluid is injected into this hot rock and passes between wells through a network of natural and induced fractures to transport heat to the surface system for electricity generation. To construct EGS wells, vertical and directional drilling is necessary with purpose-built drilling and steering equipment. This is an application where oil-and-gas drilling tools and techniques can be applied. A recent well, 16A(78)-32, drilled as part of the US Department of Energy's (DOE's) Utah Frontier Observatory for Research in Geothermal Energy (FORGE) program, highlights some of the technical challenges, which include drilling an accurate vertical section, a curve section, and a 5300-ft 65° tangent section in a hard granitic formation at temperatures up to 450°F (232°C). Extensive downhole temperature simulations were performed to select fit-for-purpose drilling equipment such as purely mechanical vertical drilling tools, instrumented steerable downhole motors, measurement-while-drilling (MWD) tools, and embedded high-frequency drilling dynamics recorders. Downhole and surface drilling dynamics data were used to fine- tune bit design and motor power section selection and continuously improve the durability of equipment, drilling efficiency, and footage drilled. Drilling optimization techniques used in oil and gas settings were successfully applied to this well, including analysis of data from drilling dynamics sensors embedded in the steerable motors and vertical drilling tools, surface surveillance of mechanical specific energy (MSE), and adopting a drilling parameter roadmap to improve drilling efficiency to minimize drilling dysfunctions and equipment damages. Through drilling optimization practices, the instrumented steerable motors with proper bit selections were able to drill more than 40 ft/hr on average, doubling the rate of penetration (ROP), footage, and run length experienced in previous granite wells. This paper presents a case study in which cutting-edge oil-and-gas drilling technologies were successfully applied to reduce the geothermal well drilling time by approximately half.

Remote Sensing and Geospatial Technologies Application for Developing Options to Relocate CSX Railroad From Mississippi Gulf Coast Townships

2002 ◽  
Author(s):  
Charles G. O’Hara ◽  
Roger L. King ◽  
John Cartwright ◽  
Jason King
Keyword(s):  
Remote Sensing ◽  
Environmental Assessment ◽  
Transportation Planning ◽  
Design Research ◽  
Gulf Coast ◽  
Public Access ◽  
Geospatial Technologies ◽  
High Resolution Data ◽  
Research Activities ◽  
Mississippi Gulf Coast

An environmental assessment will be conducted to study the impacts of relocating segments of the CSX railroad out of significant population growth areas along the environmentally sensitive Mississippi Gulf Coast. The environmental assessment project, which is to be jointly managed by the Mississippi DOT and FHWA, will make broad use of remote sensing and geospatial technologies. The project has been awarded and will be supported by the technical and research resources of the National Consortium on Remote Sensing in Transportation (www.ncrst.org). The National Consortia on Remote Sensing in Transportation (NCRST) comprises four university research consortia sponsored by the US DOT. The consortia conducts research to improve our understanding about how remote sensing and geospatial technologies can provide planners, managers, engineers, and analysts with information resources that can be used to improve multimodal transportation planning, design, operation, and maintenance efforts. Consortia activities also are focused on conducting technical outreach with transportation agencies and organizations to demonstrate how remote sensing and geospatial technologies can be effectively implemented and to improve understanding of where additional research, outreach, and training activities are most needed. The environmental assessment component of the consortia works with new sources of high resolution data to provide improved information for evaluating options, assessing environmental conditions, screening sensitive areas, optimizing potential alignments, and conducting preliminary planning and design. Research activities have shown that if appropriate remote sensing data are collected early in the project life cycle the benefits of the data include: • Enhancing transportation planning; • Improving early design processes; • Improving the ability to develop and provide informational materials for public access; and • Better communication and demonstration of benefits of planned transportation service improvements.

Elastic-Plastic Compaction of Geopressured Sandstone

1991 ◽  
Vol 113 (1) ◽  
pp. 57-61
Author(s):  
E. P. Fahrenthold
Keyword(s):  
Geothermal Energy ◽  
Field Experiments ◽  
Mechanical Response ◽  
Gulf Coast ◽  
Three Dimensional ◽  
Reservoir Rock ◽  
Elastic Plastic ◽  
Well Production ◽  
Production Problems

The economic development of United States Gulf Coast geopressured-geothermal energy resources depends in part upon an improved understanding of reservoir rock response to long-term aquifer production. Although field experiments have shown that rock mechanical response can significantly influence well production rates and that sand production problems can prevent efficient reservoir depletion, the absence of general reservoir rock models has hindered analytical studies of such problems. This paper provides experimental property measurements and a three-dimensional elastic-plastic constitutive model for sandstone cored from the most active Gulf Coast geopressured well currently in operation.

scholarly journals Aerated Drilling Optimization in Geothermal Well Drilling in Field “X” Cluster “Y”

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Raka Aditya Pratama ◽  
Astra Agus Pramana ◽  
Bambang Kustono
Keyword(s):  
Similar Condition ◽  
Geothermal Energy ◽  
Compressed Air ◽  
Fluid Stream ◽  
Well Drilling ◽  
Hole Cleaning ◽  
Geothermal Well ◽  
Drilling Optimization

<em>Aiming for productive fault in Suban Agung Rim, Field X Cluster Y Bengkulu Province, Indonesia, PT Pertamina Geothermal Energy (PGE) drilled some wells to discover the potential awaited. However there are challenge awaits each meter ahead especially in reservoir sections where loss circulation is expected. Knowing the risk, PGE decided to drill the well utilizing aerated drilling. The method has known for decades to be the most effective approach in dealing loss circulation. The method applies certain value of compressed air to be injected in fluid stream, so bubbling process can be achieved in order to reduce the mud weight. The method has benefit to maintain ROP and minimize the risk for pipe get stuck due to poor hole cleaning in fractured formation. There are three wells drilled in Field X Cluster Y which has the same problem in 9-7/8” section; all experienced stuck pipe while drilling. During the process aerated drilling was utilized, however it was not sufficient. This paper will discuss and explain on how the occurrence happened and what to do next in similar condition to avoid the problems.</em>

Sign in / Sign up

Export Citation Format

Share Document