... autodriller dysfunction upstream oil & gas drilling equipment contractor variance united states government autodriller rig-control system rig contractor TECHNICAL PAPERS | Bits and Bottomhole Assemblies Autodrillers, Rig-Control Systems, Driller Procedures Reduce BHA Failures Reducing...

.... The authors found that the quadratic partial least square (QPLS) regression model offers flexibility to handle a wide range of problems. However, the posterior variances of the QOIs are estimated by a localization process wherein the mismatch of the regression model for samples closed to observed data is used...

.... With the testing data being processed automatically and the valid or best results being selected from each test sequence, automatically identifying reservoir fluid-flow behaviors is possible. log analysis variance real time system Upstream Oil & Gas Saudi Arabia government Specialist interpretation...

... constraint threshold evaluation Artificial Intelligence Upstream Oil & Gas variance economic evaluation granularity complexity Portfolio Implementation corporate portfolio organizational alignment portfolio optimization forecasting capital Implementation characterization 52 JPT...

... not only to the evaluation of individual wells to determine their ultimate recovery but also to the statistical models built to judge the economic value of drilled wells. In the analysis of small sample sizes (and assuming independent and identically distributed samples), the variance is always...

.... The stress-dependent aperture-distribution data demonstrate that increasing stress results in two effects: The mean aperture will decrease and the variance of aperture distribution will increase. By analyzing the stress-dependent mean and variance of aperture distributions, this paper provides a more...

... summaries such as the mean, median, mode, variance, and standard deviation (Fig. 1c). Intuitively, as scientists and engineers dealing with Earth properties, we know that the geological features of reservoirs are not randomly distributed in a spatial context. The reservoirs are heterogeneous and have...

... at the 2001 SPE Annual Technical Conference and Exhibition, New Orleans, 30 September-3 October. 1 12 2001 1 12 2001 1 12 2001 1 12 2001 2001. Society of Petroleum Engineers asset and portfolio management upstream oil & gas spe variance probabilistic analysis reserves...

..., prepared for the 1998 SPE Annual Technical Conference and Exhibition, New Orleans, 27-30 September. well log variance variogram seismic data standard deviation geologic modeling acoustic-impedance block inversion upstream oil & gas information reservoir parameter acoustic impedance...

... variable time. NOMENCLATURE a=parabolic equation constant, t 1, years 1 b=parabolic equation constant, (tL3) 1, (yr-bbl) 1 Np= cumulative production, L3, bbl Np,u=ultimate cumulative production, L3, bbl q= total production rate, L3/t, millions of bbl/yr R2= fraction of variance in the dependent variable...

... for permission to use material from this document. Reservoir Surveillance cumulative production Mamora recovery production monitoring investment Hubbert model independent variable production forecasting Hubbert variance fraction production control exponential decline rate oil industry...

..., decline rates, and proved reserves is powerful for several reasons. 1 5 1997 1 5 1997 1 5 1997 1 5 1997 1997. Society of Petroleum Engineers production monitoring variance hubbert decline rate cumulative production scenario independent variable ultimate recovery...

... learning permeability fluid dynamics deviation reservoir simulation reservoir simulator variance standard deviation information upstream oil & gas d-optimal design input parameter response variable coefficient explanatory variable interaction simulation model flow in porous media...

... value of the lease, . Assume that both j and all i obtain their estimates, and, as samples from a lognormal distribution with the geometric mean of V= 1 and variances and, respectively. Further assume that each Bidder i submits a bid, equal to the product of the individual bidder's and a bid fraction...

... log-normal distribution distribution function asset and portfolio management lease data biometrika variance homogeneity statistics Non-Log-Normality of the OCS Lease Bidding Data J.P. Keating, U. of Texas Summary. A simple nonparametric technique is given that can detect deviations from...

... is an economic success. The probability of an economically successful search, PES, is always less than the probability of a geologically successful search, PS. PS. With a geological success, a positive amount, Q, is sampled from a log normal distribution of median size, RG, and variance, . JPT p. 325 1 3...

... load increment variance coefficient element strength reliability assessment safety 1 3 1979 1 3 1979 1 3 1979 1 3 1979 1979. Society of Petroleum Engineers Reliability Analysis Format for Offshore Structures F. Moses, Case Western Reserve U. B. Stahl, Amoco...

.... 275 1 2 1978 1 2 1978 1 2 1978 1 2 1978 1978. Society of Petroleum Engineers separation and treating residence time distribution mean residence time variance free-water knockout time distribution curve oil-water separator Upstream Oil & Gas hydraulic...

... the results are particularly to decision makers for whom the results are developed. The parameter method is so named because it deals with the parameters of the probability distributions involved, rather than the distributions in their entirety. Usually, only two parameters, the mean and variance, are used...

... and portfolio management single cutoff rate application fraction capital-budgeting process Upstream Oil & Gas variance risk aversion journal of petroleum technology capital budgeting calculation subsidiary cutoff rate eventuality investment investor multiple cutoff rate suggestion 1975...