This study is on supply chain integration and organisational performance in the upstream oil and gas sector in Nigeria, while the specific objectives are to examine the extent to which information sharing, knowledge sharing process, collaborative awareness, and technological capabilities integration influence on organisational performance of firms in the industry. It is a cross sectional field survey for the year 2017 with focus on oil and gas firms in the upstream sector operating in the six Niger Delta states (Akwa Ibom, Bayelsa,   Cross River, Delta, Edo and Rivers). These include firms in the Joint venture companies with Nigerian National Petroleum Corporation (NNPC), production sharing companies, independent (Sole Risks) companies (national oil companies), and those in the marginal fields. A total of forty oil and gas companies were investigated with a total population of 1,683 and a sample size of 323 of management and senior staff of Supply Chain Units (Warehousing, Procurement, Inventory Management and Logistics), and Audit, Finance and Accounts Division that monitor or involved in the supply chain integration in the various organisations. Data generated were analysed using ordinary least square (OLS) regression. The study found that information sharing, knowledge sharing, process, collaborative awareness, and technological capabilities integration were statistically significant influence and positively related to organisational performance.