Buyer-seller relationships, Supply chain management, Petroleum Industry.

The supply chain is one of the important aspects in business, especially in the gas and oil fields. Buyers need a constant supply of differentiated products on regular basis to meet their commitments whereas suppliers need continuous access to a market that will accept their products. The relationship between buyers and seller is a part of the main building blocks of this chain. Therefore, in the current study, the parameters influencing the buyers-seller relationship have been practically investigated. A semi-structured interview was designed and applied over selected companies in the field of oil and gas industry. The results show that trust, commitment, communications, and collaboration are the important factors affecting the buyer-seller relationship. However, at the beginning of the transaction, trust is especially important while good cooperation is the main key for success of the supply chain management. Moreover, it is seen that communications and commitment are cornerstones for optimum performance, long and stable relationship between buyers and sellers.