Download Fundamentals of Gas Reservoir Engineering by Jacques Hagoort (Eds.) PDF

By Jacques Hagoort (Eds.)

Fuel reservoir engineering is the department of reservoir engineering that offers solely with reservoirs of non-associated gasoline. The leading objective of reservoir engineering is the formula of improvement and construction plans that may bring about greatest restoration for a given set of monetary, environmental and technical constraints. this isn't a one-time task yet wishes continuous updating during the creation lifetime of a reservoir.The aim of this e-book is to collect the basics of gasoline reservoir engineering in a coherent and systematic demeanour. it really is meant either for college kids who're new to the topic and practitioners, who may perhaps use this ebook as a reference and refresher. each one bankruptcy could be learn independently of the others and contains a number of, thoroughly labored workouts. those workouts are a vital part of the e-book; they not just illustrate the speculation but in addition exhibit find out how to observe the speculation to sensible problems.Chapters 2, three and four are focused on the elemental actual homes of reservoirs and average gasoline fluids, insofar as of relevance to gasoline reservoir engineering. bankruptcy five offers with the volumetric estimation of hydrocarbon fluids in-place and the recoverable hydrocarbon reserves of fuel reservoirs. bankruptcy 6 offers the cloth stability approach, a vintage technique for the research of reservoir functionality according to the legislation of Conservation of Mass. Chapters 7-10 speak about numerous elements of the move of average gasoline within the reservoir and the wellbore: unmarried part stream in porous and permeable media; gaswell trying out equipment in accordance with single-phase stream rules; the mechanics of gasoline movement within the wellbore; the matter of water coning, the construction of water besides the fuel in fuel reservoirs with underlaying backside water. bankruptcy eleven discusses usual depletion, the typical improvement alternative for dry and rainy fuel reservoirs. the improvement of gas-condensate reservoirs through gasoline injection is taken care of in bankruptcy 12.Appendix A lists the generally used devices in fuel reservoir engineering, in addition to their conversion elements. Appendix B contains a few exact actual and mathematical constants which are of specific curiosity in fuel reservoir engineering. eventually, Appendix C comprises the actual houses of a few universal natural-gas parts.

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Because water is the wetting phase, capillary forces make the water flow in the narrower pores which is why the water relative-permeability skirts the saturation axis at the connate water saturation. The relative water permeability reaches its maximum value at the residual gas saturation. This residual gas is present in the form of discontinuous bubbles trapped in the larger pores and which are effectively blocking the flow of water in these pores, resulting in a low relative permeability for water.

8 WATER SATURATION (fraction) Fig. , the endpoint saturations and the pertaining relative permeabilities. For most gas reservoir problems where water displaces gas, the shape of the curves between the endpoint values is of minor importance. This is because the viscosity of water is much greater than the gas viscosity, which results in a relatively sharp and piston-like displacement front, regardless of the shape of the relative permeability curves. Reservoir Properties LIST OF SYMBOLS Latin A A cpe cb cP cR dS hP hGWC J k k L~ p pg Pgr w gwr pZD q r r = = = = = = = = = = = = = = = = = = = = = = = s112 = u = W = b: = cross-sectional flow area poro-elastic constant bulk rock compressibility pore compressibility effective reservoir compressibility solid rock compressibility mean particle diameter height above free water level capillary rise Leverett dimensionless capillary pressure function permeability relative permeability lenght of rock sample pressure gas pressure gas pressure at reference level water pressure water pressure at reference level capillary pressure dimensionless capillary pressure volumetric injection rate internal radius capillary tube radii of curvature of gas-water interface water saturation volumetric velocity bulk volume rock sample pore volume rock sample P Greek a = coefficient of viscous flow resistance 6 = coefficient of inertial flow resistance y = interfacial tension between gas and water = height of capillary transition zone = pressure drop between inflow and outflow end core sample Ap = density difference = porosity p = viscosity v = Poisson ratio p = density p = gas density = water density a = stress (compression positive) o = mean hydrostatic stress a = effective stress ef ic pt Reservoir Properties REFERENCES 1.

The Pars gas is an example of a high-calorific gas. - Gases that contain significant amounts of hydrogen sulfide and carbon dioxide (Waterton) are called sour gases. Sweet gases (Groningen) contain negligible quantities of hydrogen sulfide. Sour gas systems are very corrosive and require special treatment to remove the hydrogen sulfide. C and a reservoir pressure of 300 bar. C the vapour pressure of water is approximately 1 bar. 33 mole per cent). 63 m3. 423~105kmol/day. 423 x 10 = 139 kmol/day.

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