Presented by: Zeeshan Ahmad

Presented To :Prof Anwar Qureshi

UAJK

LITHOSTRATIGRAPY OF UPPER INDUS BASIN AND HC PRODUCTION

The Kohat-Potwar Basin also called Upper Indus Basin is situated in northern Pakistan and located between lat. 32° and 34° N and, long. 70° and 74° E.

Depositional Settings of the Kohat-Potwar Basin

Sedimentation in the Kohat-Potwar area began in the Precambrian and lasted until the Pleistocene.

Three major unconformities in the area are Ordovician to Carboniferous , Mesozoic to late Permian and Eocene to Oligocene.

Salt Range Formation which is overlain metamorphic rocks reported as the oldest sedimentary rocks in the Kohat-Potwar Basin

Cambrian rocks comprised sandstone, siltstone, shale and dolomite represented by Khewra, Kussak, Jutana, and Baghanwala Formations.

After Cambrian sequence there is unconformity and the type is disconformity.

Cease of deposition was up to Permian. Permian sequence of Kohat-Potwar Basin includes :

Tobra Formation ,Dandot Formation, Warcha sandstone, Sardhai Formation, Amb Fm, Wargal L.st, Chhidru Fm.

Unconformity exist after Permian and then Triassic sequence starts.

Triassic sequence : Mianwali Fm, Chak Jabbi L.st, Tredian Fm, Kingriali Fm.

Unconformity and then Jurassic sequence was deposited.

Jurassic sequence : Datta Formation, Shinawri Formation, Samana Suk Formation.

Unconformity and then Cretaceous sequence was deposited.

Cretaceous Sequence : Chichali Formation, Lumshiwal Formation, Kawagarh Formation.

Unconformity and then Paleocene sequence.

Paleocene sequence : Hangu Formation, Lockhart L.st, Patala Formation.

Unconformity and then Eocene sequence. Eocene sequence : Mrgala Hill Limestone, Chorgali

Formation, Kuldana Formation, Nummal Formation, Sakaser Limestone, Margalla L.st, Panoba shales, Bahadur Khel salt , Chorgali Fm, Shekhan Fm, Jatta Gypsum, Kuldana Fm, Kohat Fm.

Oligocene is missing. Miocene sequence include Rawalpindi group. Late Miocene-Pliocene Siwalik Group is present.

Hydrocarbons In Kohat-Potwar Basin

Producing wells: Well name No Of Wells Location Gas Oil Company

Manzalai 12 wells. Karak 22MMSCFD 500 bbl./day MOL

Makori   02           Karak   20 "                 6500   MOL

Nashpa   04               Karak 12               19000     OGDCL

Chanda     03            Kohat     10     6000 OGDCL

Mela         03     Kohat 02                   350 OGDCL

Dhakni     10          Attock   12                 5000 OGDCL

Jand         01                 Attock   02                   800                  OGDCL

Well name No Of Wells Location Gas Oil Company

Toot         08                     Attock --- 200            OGDCL

Rajian         06             Chakwal 02               2000             OGDCL

Kal          02         Chakwal        02               800       OGDCL

Mesakaswal     02            Chakwal 02      500     OGDCL            

Femkasar     03                 Chakwal     02                 600              OGDCL

Chaknaurag 04                     Chakwal 02                1000            OGDCL

ADHI             12                     Chakwal   16                1200                    PPL

Sadkal         04       Chakwal 02              750         OGDCL

Bhalsydan   02                   Chakwal     01                200               OGDCL

 

Dry & a banded wells

Well name Location Company Latamber karak PPL Khwaj           Kohat OGDCL Nakband         "  " Sahib gul        “  " Shekhan         "  " Sumari             "  "

Well name Location Company Ahmedn Khwaja  "  " Drabikas               "  " Essa Khel     Mianwali   " Naran shah    "  " chrat           Fateh jang      " Kala chitta                

PPL