... and production in tighter, less permeable zones, the damage-while-drilling issue becomes extremely important. The objective of this paper is to present and discuss the methodology and testing results used in selecting a drilling fluid to be employed in drilling a horizontal well in the Cardium gas reservoir...

... that well test analysis serves several important purposes in the economic development of a shallow field. A simple method is proposed to detect "limited reservoir behavior". The paper shows how well testing is integrated into field development. Three field examples of shallow gas reservoirs are presented...

... Abstract Formation damage concerns in reservoirs with ultralow water saturations have been over dramatized; perhaps, because the mechanisms of permeability reduction as a result of extraneous fluid invasion are not well understood. It has been proposed that some gas reservoirs contain less...

... Abstract As the supply of gas from conventional sources is depleted, the prospect of gas from unconventional resources will become attractive. These sources include enhanced recovery from water drive gas reservoirs, tight gas formations. Replacement/recycling gas schemes, and coal-bed methane...

... permeability gas reservoirs. Thin formation Thicker zones of marginal permeability. Thin oil columns, especially when bottom water and/or gas cap is present Chalk formations which contain natural fractures. Old reservoirs that no longer have adequate drivmechanisms. Producing reservoirs...

... Abstract Material balance analysis of production performance data for an abnormally-pressured gas reservoir is complicated because of water and rock compressibility effects in addition to gas compressibility effects. Usually, a p/z vs. G p graph for an abnormally pressured gas reservoir...

... Abstract In conventional oil and gas reservoirs, the use of prefrac pump-in tests, in conjunction with analysis of the shut-in pressure response, has been a tremendous asset in improving fracture stimulation designs. Since its introduction in 1979, many modifications and improved analysis...

... Abstract A unified treatment of materials balance computations to estimate hydrocarbons in place is presented. This method generalizes the normal procedures for gas reservoirs to all fluids of interest to the petroleum industry. We show that a plot of average pressure divided by a two-phase...

... Abstract The performance of a normally-pressured gas reservoir depends on gas compressibility effects and water influx. Generally, a straightforward material balance analysis is possible for a normally-pressured gas reservoir to estimate the initial gas-inplace. However, for an abnormally...

... due to price increases. With the increased interest along with advancements in technology, new methods of evaluating these shallow low pressure gas reservoirs are continually being developed. This has enabled operators to improve production from existing wells and to maximize production from new wells...

... as constant). In this study, the solution for the non-linear gas flow equation is obtained Using the semi-analytical technique developed by Kale and Mattar which solves the non-linear equation by the method of perturbation. Results obtained, for prediction of pressure drawdown in gas reservoirs, indicate...

.... Application of the technique to the simulation of natural gas field collection systems has been limited to the analysis of surface gathering configurations. This paper is an extension of tins concept to allow for the inclusion of gas reservoirs and production strings. This matrix formulatiol1 of the problem...

... gas in place and pool recovery efficiency. A standard method of using pressure decline plots (P/z vs Gp) to establish gas in place falsely indicates greater than actual gas volume in water driven gas reservoirs. Although methods of calculating water influx into gas reservoirs are available it has...

... in the future. At the same time, there have been substantial increases in royalty, taxes and capital and operating costs. The cumulative effect of all these changes from 1969 to the present on the attractiveness of investment in developing a marginal Milk River gas reservoir is traced. The economic...

... Abstract The practice of reservoir pressure maintenance by gas cycling has been adopted in many retrograde (wet) gas reservoirs to prevent condensation and ensuing loss of hydrocarbon liquids. An investigation of the factors involved in condensate recovery by gas cycling was made...