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_Saturation and Capillary Pressure in Reservoir Rocks

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  Jiyu Wang  akkalaurea Thesis Saturation and Capillary Pressure in Reservoir Rocks Supervised by:  Prof. Ruthammer, Gerhard Approval date:  15 th  Feb. !! #ate$ !%&11&!1'  Table of Contents Abstract................................................................................................................................41 Introduction: Reservoir Rocks........................................................................................5 1.1(mportant properties of reservoir rocks......................................................................................51.)he types of Reservoir Rocks...................................................................................................* 1..1S+#S)- RSR/-(R R-C0S...................................................................................................*1..C+R-+) RSR/-(R R-C0S...................................................................................................21..3Shale..................................................................................................................................................% 2 luids Saturation in Reservoir Rock.........................................................................1! .14ethods of #eterminin Fluid Saturation................................................................................1! .1.1#etermination of Fluid Saturations from Rock Samples..........................................................................1!.1.#etermination of Fluid Saturations by 6traction 7ith a Solvent................................................................13.1.3#etermination of Fluid Saturations 7ith lectric 8ell 9os :(ndirect;........................................................1' . )he <se of Core=#etermined Fluid Saturations............................................................................1* #apillary $ressure in Reservoir Rock.......................................................................1% 3.1#efinition...............................................................................................................................12 3.1.1Capillary Forces > 8ettability...............................................................................................................1%3.1.#rainae and (mbibition.......................................................................................................................1% 3.4ethods of measurin capillary pressure................................................................................! 3..1#esorption 4ethod.............................................................................................................................!3..Restored state method........................................................................................................................13..34ercury in?ection method :Purcell;.......................................................................................................3..'Conversion of laboratory results...........................................................................................................5 4 Relations&ip bet'een capillary pressure and (luids saturation...............................2)Su**ary............................................................................................................................2%Re(erences.........................................................................................................................2+,o*enclature..................................................................................................................... !  List of Figures Fiure 1$ Pores in reservoir rocks............................................................................................5Fiure $ Permeability in Reservoir Rocks...............................................................................*Fiure 3$ Sandstone dienesis :@onation from Scott -ilfield, orth Sea, <0;............................ Fiure '$ + thin=section photomicroraph of a limestone..........................................................2Fiure 5$ )he construction of shale in reservoir........................................................................%Fiure *. Retort distillation apparatus.....................................................................................11Fiure . )ypical retort calibration curve for 7ater..................................................................11Fiure 2. )ypical retort calibration curve for oil.......................................................................1Fiure %. 9aboratory determination of fluid saturation.............................................................13Fiure 1!. 4odified +S)4 e6traction apparatus.....................................................................13Fiure 11. So6hlet e6tractor..................................................................................................1'Fiure 1. 9imitin values of total core 7ater for oil and as production..................................1 Fiure 13. 8ettability of fluids...............................................................................................1%Fiure 1'. #rainae and imbibition........................................................................................!Fiure 15. Semi=permeable diaphram.................................................................................1Fiure 1*. Capillary pressure curve.:restored states method;.................................................Fiure 1 . 4ercury in?ection method.....................................................................................3Fiure 12. Capillary pressure by mercury in?ection$ homoeneous matri6 medium..................3Fiure 1%. Capillary pressure mercury in?ection$ medium v macropores and matri6.................'Fiure !. Capillary pressure by mercury in?ection in the case of  matri6...............................'Fiure 1. 6ample for the position of the interface...............................................................*Fiure . #rainae and imbibition curve in P C  and S nm  diaram............................................   Saturation and Capillary Pressure in Reservoir Rocks Abstract )he aim of this baccalaureate thesis 7as to ive an overvie7 of reservoir rocks and searchinfor determination of fluids saturation and capillary pressure in reservoir rock, in order to find outthe relationship bet7een fluid saturations and capillary pressure.)he focal point in this baccalaureate thesis 7as ho7 to determine the value of fluids saturationand capillary pressure in reservoir rocks, 7hat can be concluded to t7o methods, AdirectA andBindirectA method. y the euipment, 7e can read the value of fluids saturation and capillarypressure directly. ut 7e also can calculate them throuh the other properties in reservoir rocks, e.. porosity, resistivity from los, 7hen the condition can not supply the euipment,7hich 7e need. )his is indirect method. o matter 7hich method is used in the determination,7e need a result to kno7 about the relation bet7een capillary pressure and fluids saturation inthe end. So that 7e 7ill kno7, ho7 7ill the capillary pressure effect on the fluids saturation.Further, 7e 7ill et more information.  +uthor$ Diyu 8anPae$ 4
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