Ratcliffe Interval, Charles FormationWell Core: File # 10758; API: 33-105-01111SESW Sec. 31 – T153N – R102WCore Photo - Log Depth: 8,967.8 – 8,968.2 feetCalcitic dolostone; dolomudstones overlain by thinlaminated packstones and a thin intraclastic grainstonetextures (mud dominated overlain by mud filled grainsupported and rounded intraclast above an erosionsurface); interpreted to be overwash deposits on supratidalflatPorosity appears to be fine grained intercrystallinedolomite and vugular resulting from primary deposition orreplacement and the dissolution of grains. Core plugporosity 10.7%

Ratcliffe Interval, Charles FormationWell Core: File # 10758; API: 33-105-01111SESW Sec. 31 – T153N – R102WCore Photo - Log Depth: 8,980.8 – 8,981.4 feetDolomitic limestone; wackestone texture (mud dominatedwith less than 50% grains); few skeletal grains anddisturbed bedding interpreted to be subtidal depositsburrowed by sediment dwelling organismsPorosity appears to result from dolomitization of limestoneand minor dissolution of grains. Core plug porosity 19.1%

Frobisher Alida Interval, Mission Canyon Fm.Well Core: File # 12498; API: 33-053-02247SENE Sec. 21 – T151N – R100WCore Photo - Log Depth: 9831.8 – 9,832.7 feetLimestone; wackestone to packstone textures (muddominated with less than 50% grains to mud filled grainsupported); grains appear to be dominated by peloids,ooids, and a few skeletal fragments and oncolites; sutureseam stylolites indicate compaction dissolutionPorosity appears to be intraparticle and vugular resultingfrom dissolution of grains and incomplete cementation;fractures contribute to porosity and permeability. Coreplug porosity 9.5%

Frobisher Alida Interval, Mission Canyon Fm.Well Core: File # 12498; API: 33-053-02247SENE Sec. 21 – T151N – R100WCore Photo - Log Depth: 9839.2 – 9,839.9 feetLimestone; packstone to grainstone textures (mud filledgrain supported to grain supported); grains appear to bedominated by peloids, ooids, pisolites and a few skeletalfragments including brachiopods; cemented crustsinterpreted to indicate subaerial exposure surfacesPorosity appears to be vugular and interpartical resultingfrom dissolution of grains and incomplete cementation.Minor reduction of porosity by cementation, probablyanhydrite and/or calcite. Dissolution of grains suggestsubaerial exposure. Core plug porosity 7.8%

CORE PHOTOS PAY ZONE

Ratcliff Representative Log

Mission Canyon Representative Log

Ratcliffe Interval Cross Section

Location of Cross SectionsFrobisher Alida Interval, Mission Canyon FormationRatcliffe Interval, Charles Formation

Frobisher Alida Interval Cross Section

Geologic Investigations No. 7