Depositional style of the Yowlumne sands, Yowlumne oil field, southern San Joaquin basin, California

Conference · Fri Feb 01 00:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:5310936

Jessup, D D; Kamerling, M ^[1]

---

1. ARCO Oil and Gas Co., Bakersfield, CA (United States)

The Yowlumne oil field is a stratigraphic trap formed by Miocene Stevens turbidite sandstones pinching out across the San Emidio Nose. In 1989, ARCO initiated a detailed reservoir study aimed at maximizing total oil recovery. The extent of the reservoir sands and their internal geometry are described using three-dimensional seismic and well data. The presence of sand is shown in the seismic data by thickening in the upper Stevens interval, decreased seismic amplitudes and development of mounded seismic character. The increased spatial resolution provided by the seismic data allows the interpretation of internal sand boundaries between the 25-40 ac well spacing. Geometry of sand bodies on the order of 50-200 ft thick are revealed by weak reflections cutting diagonally across the gross sand interval. Boundaries between sand bodies occur as marine shale, contorted beds, and sand on sand contacts. The Yowlumne sands occur as narrow channelized sands in the southeast part of the field, which fan out north of a paleoslope break. The oldest deposits are detached fans in the northern part of the field and narrow channelized deposits in the southeastern part of the field. Subsequent fan lobes extend farther up depositional slope. Both fan and channelized deposits generally migrated westward through time overlapping older deposits. The integration of the three-dimensional seismic and well data provide a new description of the sands, which will be combined with reservoir data and incorporated into a full-field reservoir model.

• OSTI ID: 5310936
• Report Number(s): CONF-9103128-; CODEN: AABUD
• Journal Information: AAPG Bulletin (American Association of Petroleum Geologists); (United States), Vol. 75:2; Conference: American Association of Petroleum Geologists (AAPG)/Society of Economics, Paleontolgists, and Mineralogists (SEPM)/Society of Exploration Geophysicists (SEG)/Society of Professional Well Log Analysts (SPWLA) Pacific Section annual meeting, Bakersfield, CA (United States), 6-8 Mar 1991; ISSN 0149-1423
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CALIFORNIA
PETROLEUM DEPOSITS
SEISMIC SURVEYS
RESERVOIR ROCK
GEOLOGIC MODELS
MAPPING
DEPOSITION
GEOLOGIC HISTORY
GEOLOGIC TRAPS
GEOMETRY
MIOCENE EPOCH
SANDSTONES
SEDIMENTARY BASINS
CENOZOIC ERA
DEVELOPED COUNTRIES
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
MATHEMATICS
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
SURVEYS
TERTIARY PERIOD
USA
020200* - Petroleum- Reserves
Geology
& Exploration