Changes

==Data requirements==

==Data requirements==

Basic data requirements for facies analysis of subsurface rocks are listed in Table 1. Data associated with wells are most often used, but seismic data, particularly three-dimensional data, are becoming increasingly important in defining sandstone body geometries (e.g., see <ref name=pt06r17>Brown, A. R., 1986 Interpretation of three-dimensional seismic data: AAPG Memoir 42, 194 p.</ref>; also see [[Three-dimensional seismic methods for reservoir development]]). Conventional core is perhaps the most diagnostic for sedimentological interpretation of vertical sequences (see [[Core description]]). However, wireline tools such as [[dipmeters]] and formation imaging devices can provide electrical images suitable for sedimentological interpretation with the added ability to determine paleocurrent directions in appropriate cases (see [[Dipmeters]] and [[Borehole imaging devices]]).

Basic data requirements for facies analysis of subsurface rocks are listed in Table 1. Data associated with wells are most often used, but seismic data, particularly three-dimensional data, are becoming increasingly important in defining sandstone body geometries<ref name=pt06r17>Brown, A. R., 1986 Interpretation of three-dimensional seismic data: [http://store.aapg.org/detail.aspx?id=1025 AAPG Memoir 42], 194 p.</ref> (see [[Three-dimensional seismic methods for reservoir development]]). Conventional core is perhaps the most diagnostic for sedimentological interpretation of vertical sequences (see [[Core description]]). However, wireline tools such as [[dipmeters]] and formation imaging devices can provide electrical images suitable for sedimentological interpretation with the added ability to determine paleocurrent directions in appropriate cases (see [[Dipmeters]] and [[Borehole imaging devices]]).

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