PDF Publication Title:
Text from PDF Page: 019
Chapter 6 Drilling Technology and Costs clearance deeper into the hole. The pump cavity can be developed to the necessary depth. The estimates are for an injection well that has a production casing from the top of the injection zone to the surface. 620 EGS well depths beyond 4,000 m (13,100 ft) may require casing weights and grades that are not widely available to provide the required collapse and tensile ratings. The larger diameters needed for highvolume injection and production are also not standard in the oil and gas industry – this will cause further cost increases. Both threaded and welded connections between casing lengths will be used for EGS applications and, depending on water chemistry, special corrosionresistant materials may be needed. An appropriately sized drilling rig is selected for each depth using the mast capacity and rig horsepower as a measure of the needed size. A rig rental rate, as estimated in the third quarter of 2004, is used in determining the daily operating expense. It is assumed that all wellcontrol equipment is rented for use in the appropriate interval. Freight charges are charged against mobilization and demobilization of the blowoutpreventer equipment. The rates of penetration (ROP) selected in the base case are those of mediumhardness sedimentary formations to the production casing setting depth. An expected reduction in ROP is used through the production interval. For other lithology columns, it is only necessary to select and insert the price and performance expectations to derive the well cost. These bitperformance values are slightly conservative. The 1,500 m (4,900 ft), 2,500 m (8,200 ft), and 3,000 m (9,800 ft) wellcost estimates from the model compare favorably with actual geothermal drilling costs for those depths. The deeper wells at depths of 4,000 m (13,100 ft), 5,000 m (16,400 ft), and 6,000 m (19,700 ft) have been compared to costs from the JAS oil and gas well database. The length of open hole for the 7,500 m and 10,000 mdeep wells was assumed limited to between 2,100 m (6,900 ft) and 2,600km (8,500 ft). All wells should have at least one interval with significant directional activity to permit access to varied targets downhole. This directional interval would be either in the production casing interval or the interval just above. The amount and type of directional well design can be accommodated in the model. The wellcost estimates are initially based on drilling hardness, similar to those used in the Basin and Range geothermal region. It is assumed that the EGS production zone is crystalline. The well should penetrate into the desired temperature far enough so that any upward fracturing does not enter into a lower temperature formation. Also, each well is assumed to penetrate some specific depth into the granitic formation. In the deeper wells, a production interval of 1,000 m (3,300 ft) is assumed. It is reduced for the shallower wells and is noted in the Wellcost Lite output record Well costs were estimated for depths ranging from 1,500 m to 10,000 m. The resulting curves indicate drilling costs that grow nonlinearly with depth. The estimated costs for each of these wells are given in Table 6.1.PDF Image | Drilling Technology and Costs
PDF Search Title:
Drilling Technology and CostsOriginal File Name Searched:
egs_chapter_6.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |