Muted gross refining margins and declining gas production from the Krishna-Godavari basin might hit the earnings of Reliance Industries in the third quarter.
RIL will declare its results on Friday.
Analysts say the company's petrochemical segment and higher other income would boost its revenues. On an average, brokerages expect RIL's net profit to rise 12-17 per cent compared with the year-ago period.
RIL shares on Thursday hit a 52-week high.
The stock closed at Rs 889.65 on the BSE, up 3.4 per cent, after hitting a high of Rs 893.1.
It outperformed the BSE oil and gas index, which closed 2.8 per cent higher.
"We expect Reliance to report a net profit of Rs 5,043 crore for the third quarter of FY13, down six per cent quarter-on-quarter.
"While the petrochemical segment should perform better sequentially, lower refining margins and weaker gas volumes are likely to offset this. Earnings should remain muted over the next 18 months, before rebounding in 2015," Somshankar Sinha and Pooja Gupta of Barclays said in a note.
In a report, Nomura said the company's exploration and production segment would see earnings before interest and tax fall seven per cent year-on-year to Rs 800 crore (Rs 8 billion) because of poor