油层物理课件chap2.pdf

Chapter 2 Properties of Reservoir Rocks SUN Ren-yuan Room 648, Engineering Building B Sep., 2008 Sh Prov ial Excellent Course, 2008 sedimentary rocks (沉积岩) Fragmental rock (碎屑岩): mainly sandstones Carbonate rock (碳酸岩) : limestone and dolomite Ability to store fluids: porosity (孔隙度) Ability to conduct fluids: permeability (渗透率) Contents •PROPERTIES OF ROCK MATRIX • POROSITY OF RESERVOIR ROCKS • PERMEABILITY OF RESERVOIR ROCKS • FLUID SATURATION •CEMENTING MATERIALS AND TYPES OF CEMENTATION IN RESERVOIR ROCKS •CAPILLARY TUBE MODEL AND ITS APPLICATION •OTHER PROPERTIES OF RESERVOIR ROCKS Sh Prov ial Excellent Course, 2008 SECTION 1 PROPERTIES OF ROCK MATRIX Sand grains and cementing materials make up the rock matrix 1 Granulametric composition (粒度组成) 1. Definition the tative distribution of grains differing in size that make up the rock, usually expressed in weight percent. 1.2 Determination of granulometric composition (1)Thin-section measurement(薄片法) ： This method applies to sand with large grains size. (2) Screen ysis (筛析法): d=3.36mm~0.037mm ； (3) Sedimentation ysis(沉降法): d50μm. Sh Prov ial Excellent Course, 2008 1.2 Determination of granulametric composition: (1) Screen ysis a stack of wire gage sieves are arranged one under another in order of decreasing sizes. The size of the mesh: (1)the length of the side of a square opening; (2)mesh ( 目), the number of openings per h length. Sh Prov ial Excellent Co