02196nab a2200205 4500 20260520000229.0 260224s2011 xxu Sequence stratigraphy, seismic sedimentology, and lithostratigraphic plays Upper Cretaceous, Sifangtuozi area, southwest Songliao Basin, China feb. 2011 18/02/2011 ; 18/02/2011 25 p. ; 241-265 Transcripción del resumen del autor. Lithostratigraphic plays are one of the major targets for reserve growth in the nonmarine Songliao Basin, China. In this article, an integrated approach was adopted that applies principles and techniques of sequence stratigraphy and seismic sedimentology to the study of higher order sequences, depositional environments, and lithostratigraphic trapping styles. In the Sifangtuozi area, 20 higher order (fourth- or fifth-order) sequences in four third-order sequences were identified in an Upper Cretaceous interval using well and seismic data. Core description and wireline log classification helped identify distributary channel fill, distributary mouth bar, sheet sand, distal bar, prodelta/shallow lake, and semideep to deep lake deposits in fluvial-dominated deltaic systems. In two three-dimensional (3-D) seismic survey areas, seismic inversion and 90° phasing of seismic data converted seismic traces to pseudolithologic logs. Stratal slicing made it possible to interpolate and extrapolate well-data–derived sequence and facies interpretation to whole 3-D seismic surveys and then make broader interpretations and predictions on sand content, sandstone thickness, and geomorphological information. Play analysis using sandstone isopach or amplitude stratal slices and superimposed structural maps identified potential accumulations in small structural, lithostratigraphic, and combination traps. These traps are all significantly controlled by lithology, reservoir distribution, sealing conditions, and closure. 2 AAPG Bulletin 95 ARTICULO Zhao, Wenzhi 35198 Zou, Caineng 44550 Chi, Yingliu 44551 173377 173377 0 0 0 0 241196 BAAB BAAB 2026-03-05 200051367 0 200051367 2026-03-05 16:09:18 2026-03-05 ARTICULO