2D SEISMIC INTERPRETATION ALONG WITH PETRO-PHYSICAL ANALYSIS,FACIES ANALYSIS AND SEISMIC ATTRIBUTES OF JOYA MAIR,UPPER INDUS BASIN(PAKISTAN

Abstract

The Joya Mair oil field lies in the south-southeast of the Salt Range-Potwar Foreland Basin (SRPFB). It is the result of Tertiary Himalayan collision between the Indian and Eurasian Plates. The SRPFB represents the Precambrian to Recent rocks of the Indian Plate which covers an area of about 2250 Km2. The Himalayan thrusting and folding formed the structural traps in SRPFB. Seismic interpretation has resulted in time and depth contour map, which helps to understand the subsurface structural geometry. Seismic interpretation of the 2D data reveals that the study area has undergone severe deformation illustrated by the development of thrusts and backthrusts which results in the formation of triangle zone in the subsurface. The general trend of these structures is northeast-southwest which is indicative of the fact that the area was subject to southeast northwest compressive stress. The decollement surface is provided by the Salt Range Formation. The reservoir rocks are of Eocene age that occurs at a depth of 2060 m as interpreted from seismic data. The petrophysical analysis of Minwal X-01 well is done on the basis of well logs which gives approximately Vsh 33.3%,PHIA 29%.,PHIE 13%,Sw 40% ,Hs 60% in the reservoirrocks.