关键词: 海上, 稠油油田, 热力开采, 经济效益, 盈亏平衡法

Abstract: It is necessary to combine business conceptions with technological application for development of offshore low-grade oil reservoirs. Taking Nanpu 35-2 Oilfield for instance, the profit-loss balance curve analysis method is used to analyze economic performance of offshore heavy oil thermal production. Based on the results from the first round of thermal production in the testing zone of Nanpu 35-2 Oilfield, the production of most wells are only close to the profit-loss balance curve of economic development (IRR=12%, NPV=0), when the investment for platform engineering and drilling of modular rig are taken into account. On the condition that the investment for platform engineering is not taken into account, the output of all thermal production wells is above the profit-loss balance curve for economically-effective development following the first round of thermal recovery. If the oilfield has some advantageous conditions and the follow-up thermal production wells no longer share the engineering investment, the existing technology can meet the demand for economic development. The profit-loss balance curve method is recommended for reference. Namely, the stimulation operation can be used to keep economic performance of thermal production wells when the output of producing wells is below the profit-loss balance curve. Key words:

Key words: offshore, heavy oil field, thermal production, economic performance, profit-loss balance curve, systematic analysis