顺北油气田地质储量评估与油气勘探方向

doi:10.7657/XJPG20210201

摘要/Abstract

摘要：

顺北油气田是典型的断控型油气田,储集层的形成和演化与断裂活动关系密切,储集系统的基本构成和规模不受水-岩作用影响,与溶蚀缝洞型油气藏存在本质区别。因此,针对溶蚀缝洞型油气藏形成的地质储量估算方法,难以满足断控型油气藏的地质储量评估和油气勘探决策。针对顺北油气田断控型油气藏的独特性,通过对水平层状各项异性介质的绕射、低频、弱信号提取,提升高陡走滑断裂带的立体成像效果,形成了一套针对断控型油气藏描述、储量评估及资源优选评价的技术序列。基于上述断控型油气藏地质储量估算方法,开展了顺北油气田18条主干断裂带的地质储量评估工作,落实地质资源量17.00×10⁸ t油当量,并已建成年产能100×10⁴ t。此外,基于顺北油气田整体石油地质条件和勘探领域评价,提出顺北油气田整体成藏,主干断裂带之外勘探领域丰富,资源潜力巨大,指明了油气勘探方向和远景接替领域,为顺北油气田中长期发展奠定了基础。

关键词: 塔里木盆地, 顺北油气田, 断控型油气藏, 地质储量, 资源潜力, 勘探方向

Abstract:

Shunbei oil & gas field is a typical fault-controlled one, in which the formation and evolution of the reservoirs are closely related to fault activities. The basic constitution and scale of the reservoirs are not affected by water-rock interaction, which are essentially different from dissolved fractured-vuggy reservoirs. The geological reserves assessment methods established for dissolved fractured-vuggy reservoirs are hardly applicable for assessing the geological reserves and making exploration decisions for the fault-controlled reservoirs. In view of the characteristics of the fault-controlled reservoirs, we extracted weak, diffracted and low-frequency signals of the horizontal layered and anisotropic medium, and improved the 3D image quality of the steep strike-slip fault zones, and finally developed a comprehensive analytical technology for assessing the strike-slip fault zones. On this basis, using innovative methods and technologies like 3D description and facies-controlled inversion, a series of technologies such as reservoir description, reserves assessment and resource optimization and evaluation were established for fault-controlled fractured-vuggy reservoirs. Since applying these methods to 18 first-order fault zones in Shunbei oil & gas field, 1.7 billion tons of OOIP(oil equivalent) has been proved, and a production capacity of 1 million tons of oil equivalent per year has been constructed. In addition, based on the overall petroleum geological conditions and evaluation of exploration zones, it’s found that hydrocarbon accumulate in the whole field, and the exploration zones outside the first-order fault zones also have abundant resources and great exploration potentials. These understandings point out the future directions and successive plays for oil and gas exploration, and lay a foundation for the middle-long term development of Shunbei oil & gas field.

Key words: Tarim basin, Shunbei oil & gas field, fault-controlled reservoir, geological reserves, resource potential, exploration direction

中图分类号:

TE112.6

漆立新, 云露, 曹自成, 李海英, 黄诚. 顺北油气田地质储量评估与油气勘探方向[J]. 新疆石油地质, 2021, 42(2): 127-135.

QI Lixin, YUN Lu, CAO Zicheng, LI Haiying, HUANG Cheng. Geological Reserves Assessment and Petroleum Exploration Targets in Shunbei Oil & Gas Field[J]. Xinjiang Petroleum Geology, 2021, 42(2): 127-135.

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