Seven onland NELP-VI blocks will get most interest

Vol 10, PW 2 (18 May 06) Exploration & Production

Companies bidding for NELP-VI blocks still have four months before the 15th September deadline.

But which of the 55 blocks are the most prospective PETROWATCH asked a geologist for a personal assessment. Three blocks in the Cambay Basin stand out: CB-ONN-2004/1, 2 and 3.

These three blocks are good, we are told, They are near existing discoveries or producing fields. Only small or medium sized companies are likely to bid for these three because of their relatively small size.

The most prospective is the 32-sq km CB-ONN-2004/1 - part of a block earlier relinquished by ONGC. To its north likes South Kadi, to the south is Sanand, to the east is Kalol and to the west are the Jhalora and Viraj fields.

CB-ONN-2004/2, the second block in this series, is part of acreage previously relinquished by GSPC. Two blocks in Mizoram also look good: MZ-ONN-2004/1 (area: 3213-sq km) and MZ-ONN-2004/2 (area: 3619-sq km).

To the west lies the Samutang oil and gasfield in Bangladesh. Both blocks lie on the western part of the main Arakan-Yoma fold belt, we hear.

But the mountainous topography of Mizoram will make working on these blocks a logistical nightmare as seismic imaging is not possible using conventional methods. Both Mizoram blocks have highly thrusted and folded rock structures.

Encouraging oil seepages have been reported from parts of both blocks, similar to that seen in the central Burma basin. No seismic data is available on these blocks but they are assumed to be prospective given their proximity to the Baramura and Atharmura producing anticlines also located to the west.

Next are two Rajasthan blocks: RJ-ONN-2004/2 (area: 2196-sq km) and RJ-ONN-2004/3 (area: 1330-sq km). Both blocks will have heavy oil as they lie to the east and west of Oil Indias Baghewala field.

Two wells have been drilled on RJ-ONN-2004/2 and one well has been drilled on RJ-ONN-2004/3. Structural highs have been mapped on both blocks but the downside is the presence of heavy oil (19-degrees API.