..., Society of Petroleum Engineers gamma ray ls detector count rate nucleus detector spe formation evaluation well logging rin pulsed neutron log hydrogen nucleus density log analysis pnc log reservoir capture cross section spaced detector count neutron hydrocarbon reservoir...

... of secondary and tertiary oil recovery with gas injection, the displacing fluid can be carbon dioxide, natural gas, inert gas, or some other gases. The monitoring of gasfloods with a pulsed neutron tool is possible first, if the capture cross section of formation water is greater than the capture cross...

... porosity upstream oil & gas epithermal removal cross section thermal neutron pulsed neutron capture log interpretation sandstone spe formation evaluation pnc tool capture cross section log interpretation stieber cross section shale lamination Properly predicting the PNC logging tool...

... & gas capture cross section repeatability sandstone gamma ray curve interpretation base log well logging gamma ray log time-lapse comparison sigm curve perforation log analysis effective porosity porosity saturation change variation low-salinity environment evaluation reservoir pnc...

... formation evaluation porosity modeling & simulation upstream oil & gas formation brine perforation diameter injection displacement perforation length brine capture cross section flow in porous media fluid dynamics reservoir characterization drillstem testing formation evaluation...

... reservoir performance and to justify remedial actions. 4 4 1990 6 2 1991 19 9 1991 1 12 1991 1 12 1991 Copyright 1991, Society of Petroleum Engineers capture cross section upstream oil & gas boron injection spam filtering cross section cement channel...

... borehole that attenuates the tool response and a halite cement in the formation with a very high capture cross section. Increased understanding of these factors has improved the reliability of interpretations. Recent results indi cate water advance in all three fields. Currently, water production has been...

... selected in the wells where PNC tools had been run. The thermal-neutron capture cross section for each sand was determined from Σ PNC values, and Eq. 4 was used to calculate Σ ma . The calculated Σ ma values ranged from 7 to 13 c.u., with an overall average of 10 c.u. Σ ma was also calculated...

... 11 1989 11 12 1989 1 3 1990 1 3 1990 Copyright 1990, Society of Petroleum Engineers Upstream Oil & Gas well logging Phillips Petroleum Co log analysis capture cross section porosity openhole log water saturation evaluation ieacid pnc survey production...

...-neutron capture measurement could be implemented. In both quantitative and qualitative applications of the TDT technique, it is important that the formation neutron-capture cross section, or sigma, measurement is accurate and independent of the fluid in the borehole. The dependence of the formation...

... 1986 13 3 1987 18 5 1987 1 12 1987 1 12 1987 Copyright 1987, Society of Petroleum Engineers operation cross section application december 1987 dev reservoir packer symposium formation capture cross section calculation detector std well logging borehole...

... and borehole macroscopic capture cross sections (Σ). Good agreement was obtained between our calculations and laboratory TDT measurements. Monte Carlo calculations were made to separate the contributions to the detector count rates resulting from gamma rays produced in various regions, such as the borehole...