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Chapter 9: 3-D
Evaluation of the Ping Hu Field, East China Sea
Matthew R. Silverman,* Qin Wang,* Bruce
L. Byrd,* Zhao Jiong KunÝ, Zhang Hai Ying,Ý
Chen MingÝ, and Paul Weimerý
M. R., Qin Wang, B. L. Byrd, Zhao Jiong Kun, Zhang Hai Ying, Chen Ming,
and P. Weimer, 3-D Evaluation of the Ping Hu Field, East China Sea, in
P. Weimer and T. L. Davis, eds., AAPG Studies in Geology No. 42 and SEG
Geophysical Developments Series No. 5, AAPG/SEG, Tulsa, p. 91-102.
Ping Hu Field, discovered
in 1982 in the East China Sea, 365 km offshore China, consists of two structural
closures on a complex, faulted anticline. Chinese authorities have planned
for the field to provide natural gas to Shanghai in the 21st century. Five
wells have been drilled, and more than 2400 km of 2-D and 118 km2
of 3-D seismic data have been interpreted. Both structures were identified
by 2-D data and drilled prior to acquisition of the 3-D seismic data.
Interpretation included mapping
key reservoirs and fault analysis. Reservoir composition, distribution,
and lateral variations were described. These variations were determined
by studying geophysical attributes of the data, which included instantaneous
amplitude, frequency, phase, and acoustic impedance. Seismic data were
inverted to acoustic impedance (density and velocity) and transformed into
reservoir parameters. Crossplot regression analyses of petrophysical parameters
were performed, and relationships between pairs of values of porosity,
acoustic impedance, permeability, and water saturation were derived.
An integrated geological-geophysical-
reservoir engineering evaluation was required for accurate hydrocarbons-in-place
calculations. The interpretation was utilized for field development planning,
but implementation has been delayed due to distance from shore relative
to field size.
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