Exploration and Development Technology for Lithologic-Structural Reservoir in Dorotea Block of Llanos Basin in South America

Abstract

Abstract: Located in the slope belt of Llanos Basin in South America, Dorotea block has a number of technological bottlenecks, such as difficulty for confirmation of low-amplitude structural trap, unclear genesis and distribution of sand body, high water-cut after new wells put into production, and high drilling accident rate. Based on study of mature exploration and development theories and technologies for similar oilfields both at home and abroad, special technological study is conducted to develop a series of technologies, such as stratigraphic classification and layer correlation, interpretation of low-amplitude structure, prediction of thin layers, identification of oil and water layers, geological modeling for sparse well pattern, reservoir numerical simulation, horizontal well production, optimization of drilling under complicated hole conditions, and optimization of perforation parameters. Those technologies have effectively solved the bottlenecks in progressive exploration of low-amplitude lithologic-structural oil reservoir with strong bottom water driving. As a result, the remaining traps of this project are increased while success rate of exploration well is obviously improved. With the reserve and production significantly raised, the economic performance is also improved substantially.

Feng Fang, Wang Xiaojie, Hu Junfeng, Li Dongmei, Liu Xuemei, Hu Ping, Wang Huan. Exploration and Development Technology for Lithologic-Structural Reservoir in Dorotea Block of Llanos Basin in South America[J]. China Petroleum Exploration, 2015, 20(3): 79-88.

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