Results 31 to 40 of about 504,034 (304)
Achievements and future work of oil and gas production engineering of CNPC
Petroleum Exploration and Development, 2019 This paper summarizes the latest achievements and technological progress in oil and gas production engineering of China National Petroleum Corporation (CNPC) and discusses the main four challenges faced: developing low quality resource at low oil price ...
Qun LEI +6 more
doaj +1 more source
Bondi flow from a slowly rotating hot atmosphere [PDF]
, 2011 A supermassive black hole in the nucleus of an elliptical galaxy at the centre of a cool-core group or cluster of galaxies is immersed in hot gas. Bondi accretion should occur at a rate determined by the properties of the gas at the Bondi radius and the ...
Abramowicz +67 more
core +3 more sources
Gas Slippage in Tight Formations
, 2023 In order to address the gas slippage for flow through tight formation, with a very low porosity (less than 10%) and permeability in micro-Darcy range, a series of single-phase gas flow experiments were conducted. Two different gases (N2 and He) were used to carry out many single-phase experiments at different overburden and pressure drops and were ...
Sherif Fakher, Abdelaziz Khlaifat
openaire +2 more sources
Understanding chemical evolution in resolved galaxies -- I The local star fraction-metallicity relation [PDF]
, 2015 This work studies the relation between gas-phase oxygen abundance and stellar-to-gas fraction in nearby galaxies. We first derive the theoretical prediction, and argue that this relation is fundamental, in the sense that it must be verified regardless of
Ascasibar, Y. +5 more
core +2 more sources
Studies of natural gas production prediction and risk assessment for tight gas in Sichuan Basin
Frontiers in Earth Science, 2023 After a new round of tight gas geological evaluation was launched in 2018, a new chapter of tight gas exploration and development has been opened in the Sichuan Basin.
Haitao Li +4 more
doaj +1 more source
Efficiency at maximum power output for an engine with a passive piston [PDF]
, 2016 Efficiency at maximum power (MP) output for an engine with a passive piston without mechanical controls between two reservoirs is theoretically studied. We enclose a hard core gas partitioned by a massive piston in a temperature-controlled container and ...
Hayakawa, Hisao, Sano, Tomohiko G.
core +2 more sources
Geofluids, 2022 Although significant progress has been made in tight gas exploration and development, there is still a limited understanding of the gas accumulation mechanism in tight formation.
Lin Jiang +5 more
doaj +1 more source
Tight Gas Potential Status, Obstacles and the Way Forward in Meeting Future Energy Needs of Pakistan
Mehran University Research Journal of Engineering and Technology, 2021 Production from unconventional tight gas resources plays significant role in energy market. It is commonly held that the tight gas has gained considerable importance in meeting energy needs and is widely developed across the world.
Aftab Ahmad Mahesar +2 more
doaj +1 more source
The Economic and Budgetary Effects of Producing Oil and Natural Gas From Shale [PDF]
, 2014 [Excerpt] Recent advances in combining two drilling techniques, hydraulic fracturing and horizontal drilling, have allowed access to large deposits of shale resources—that is, crude oil and natural gas trapped in shale and certain other dense rock ...
Congressional Budget Office
core +1 more source
, 2010 We investigate 35 pre-stellar cores and 36 proto-stellar cores in the Perseus molecular cloud. We find a very tight correlation between the physical parameters describing the N2H+ and NH3 gas.
Aikawa +34 more
core +1 more source