干旱区生态环境知识资源中心(Arid): Comparative analysis of core drilling and rotary drilling in volcanic terrane

Arid

DOI	10.2172/6698971
报告编号	DOE/SF/16609-T1
来源ID	OSTI_ID: 6698971
	Comparative analysis of core drilling and rotary drilling in volcanic terrane
	Flynn, T.; Trexler, D.T.; Wallace, R.H. Jr. (ed.)
英文摘要	Initially, the goal of this report is to compare and contrast penetration rates of rotary-mud drilling and core drilling in young volcanic terranes. It is widely recognized that areas containing an abundance of recent volcanic rocks are excellent targets for geothermal resources. Exploration programs depend heavily upon reliable subsurface information, because surface geophysical methods may be ineffective, inconclusive, or both. Past exploration drilling programs have mainly relied upon rotary-mud rigs for virtually all drilling activity. Core-drilling became popular several years ago, because it could deal effectively with two major problems encountered in young volcanic terranes: very hard, abrasive rock and extreme difficulty in controlling loss of circulation. In addition to overcoming these difficulties, core-drilling produced subsurface samples (core) that defined lithostratigraphy, structure and fractures far better than drill-chips. It seemed that the only negative aspect of core drilling was cost. The cost-per-foot may be two to three times higher than an ''initial quote'' for rotary drilling. In addition, penetration rates for comparable rock-types are often much lower for coring operations. This report also seeks to identify the extent of wireline core drilling (core-drilling using wireline retrieval) as a geothermal exploration tool. 25 refs., 21 figs., 13 tabs.
出版年	1987
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	42 ENGINEERING ; 15 GEOTHERMAL ENERGY ; VOLCANIC ROCKS ; DRILLING ; COST ; DRILL BITS ; DRILL CORES ; GEOTHERMAL EXPLORATION ; GEOTHERMAL RESOURCES ; NUMERICAL DATA ; PENETRATION DEPTH ; ROCK DRILLING ; ROTARY DRILLING ; DATA ; DRILLING EQUIPMENT ; EQUIPMENT ; EXPLORATION ; IGNEOUS ROCKS ; INFORMATION ; RESOURCES ; ROCKS Geothermal Legacy
URL	http://www.osti.gov/scitech/servlets/purl/6698971
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/263903
推荐引用方式 GB/T 7714	Flynn, T.,Trexler, D.T.,Wallace, R.H. Jr. . Comparative analysis of core drilling and rotary drilling in volcanic terrane,1987.