Abstract: Computer Aided Graphics Simulation Modelling Using Seismo-Geologic Approach in Sequence Stratigraphy of Early Cretaceous Punjab Platform, Central Indus Basin, Pakistan

Talat M. Qureshi, Khalid A. Khan

Modelling stratigraphic sequence by using seismo-geologic approach, integrated with cyclic transgressive-regressive deposits, helps to identify a number of non-structural subtle traps.

Most of the hydrocarbons found in Early Cretaceous of Central Indus Basin pertain to structural entrapments of upper transgressive sands. A few wells are producing from middle and basal regressive sands, but the massive regressive sands have not been tested so far. The possibility of stratigraphic traps like wedging or pinch-out, a lateral gradation, an uplift, truncation and overlapping of reservoir rocks is quite promising.

The natural basin physiography at times has been modified by extensional episodic events into tectono-morphic terrain. Thus, seismo scanning of tectonically controlled sedimentation might delineate some subtle stratigraphic traps.

Amplitude maps representing stratigraphic sequences are generated to identify the traps. Seismic expressions indicate the reservoir quality in terms of amplitude increase or decrease. The data is modelled on computer using graphics simulation techniques.

AAPG Search and Discovery Article #90951©1996 AAPG International Conference and Exhibition, Caracas, Venezuela