碳酸盐岩缝洞型油藏剩余油分布模式及挖潜对策

doi:10.7623/syxb201406011

石油学报 ›› 2014, Vol. 35 ›› Issue (6): 1138-1146.DOI: 10.7623/syxb201406011

碳酸盐岩缝洞型油藏剩余油分布模式及挖潜对策

荣元帅^1,2, 赵金洲¹, 鲁新便², 李新华², 李小波²

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 中国石油化工股份有限公司西北油田分公司勘探开发研究院新疆乌鲁木齐 830011

收稿日期:2014-05-09 修回日期:2014-08-16 出版日期:2014-11-25 发布日期:2014-10-13
通讯作者: 荣元帅,男,1978年2月生,2001年毕业于西南石油学院石油工程专业,2004年获西南石油学院油气田开发工程专业硕士学位,现为西南石油大学油气田开发工程专业博士研究生,主要从事碳酸盐岩缝洞型油藏开发研究。Email:rongmarshal@163.com
作者简介:荣元帅,男,1978年2月生,2001年毕业于西南石油学院石油工程专业,2004年获西南石油学院油气田开发工程专业硕士学位,现为西南石油大学油气田开发工程专业博士研究生,主要从事碳酸盐岩缝洞型油藏开发研究。Email:rongmarshal@163.com
基金资助:
国家重点基础研究发展计划(973)项目(2011CB201005)和国家重大科技专项(2011ZX05049)资助。

Remaining oil distribution patterns and potential-tapping countermeasures in carbonate fracture-cavity reservoir

Rong Yuanshuai^1,2, Zhao Jinzhou¹, Lu Xinbian², Li Xinhua², Li Xiaobo²

1. State Key Laboratory of Oil ＆ Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. Exploration & Development Research Institute, Sinopec Northwest Oil Field Company, Xinjiang Urumqi 830011, China

Received:2014-05-09 Revised:2014-08-16 Online:2014-11-25 Published:2014-10-13

摘要/Abstract

摘要：

针对塔河油田碳酸盐岩缝洞型油藏缝洞结构复杂导致开发中后期剩余油分布认识不清的问题,从油藏实际出发,在油藏精细描述、测试及生产动态资料分析的基础之上,提出了碳酸盐岩缝洞型油藏7大类13亚类剩余油分布模式。井点剩余油有3大类8亚类,即阁楼型、致密段遮挡型及底水上升封挡型;井间剩余油有4大类5亚类,即低幅残丘型、支流河道型、分隔缝洞型及高导流通道附近孔缝型。结合生产实践,针对不同剩余油分布模式提出了剩余油挖潜对策:对井距较大的井间未井控缝洞中各类剩余油,通过部署新井或利用老井侧钻进行挖潜;对于井距较小的各类剩余油则利用常规措施有针对性地进行挖潜;大型酸压、水力扩容和排水采油、注气替油分别是分隔缝洞型及阁楼型剩余油独具特色的有效挖潜措施。在塔河油田开发生产过程中针对各类剩余油分布模式的挖潜工作取得了较好增产效果,为同类油藏的剩余油挖潜提供了思路和方法借鉴。

关键词: 碳酸盐岩, 缝洞型油藏, 剩余油, 分布模式, 挖潜

Abstract:

The distribution of remaining oil in Tahe oilfield during the middle and later stages of development is not well understood, mainly due to highly complex fracture-cavity structure of carbonate reservoirs. This study starts from the practical situation of oil reservoirs and lays an emphasis on detailed reservoir description and testing and dynamic production data analysis. Seven types and thirteen sub-types of remaining oil distribution patterns are put forward. These include three types and eight sub-types of wellhole-adjacent remaining oil, i.e., attic type, screened dense layer type, and blocked type due to rise of bottom water. Additionally, there are four types and five sub-types of interwell remaining oil, i.e., low-amplitude monadnock type, branch channel type, separated fracture-cave type, and pore-fracture type near the high diversion channel. Combined with production practices, potential-tapping countermeasures are proposed for different remaining oil distribution patterns. On the one hand, drilling new wells or sidetracking from the existing wells are recommended for all kinds of remaining oil existing in non-well-controlled fractured-cave with relatively large well spacing. On the other hand, routine targeted potential-tapping measures are chosen for those with relatively small well spacing. Large-scale acid fracturing-hydraulic dilation and drainage process-displacing oil with gas are unique and effective measures for separated fracture-cave and attic patterns, respectively. Good results of increasing production have been gained by tapping the potential of all kinds of remaining oil during the development of Tahe oilfield. This study provides new thinking and reference measures for remaining oil digging in similar oil reservoirs.

Key words: carbonate rock, fractured-cavity oil reservoir, remaining oil, distribution pattern, potential tapping

中图分类号:

TE344

荣元帅, 赵金洲, 鲁新便, 李新华, 李小波. 碳酸盐岩缝洞型油藏剩余油分布模式及挖潜对策[J]. 石油学报, 2014, 35(6): 1138-1146.

Rong Yuanshuai, Zhao Jinzhou, Lu Xinbian, Li Xinhua, Li Xiaobo. Remaining oil distribution patterns and potential-tapping countermeasures in carbonate fracture-cavity reservoir[J]. ACTA PETROLEI SINICA, 2014, 35(6): 1138-1146.

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碳酸盐岩缝洞型油藏剩余油分布模式及挖潜对策

Remaining oil distribution patterns and potential-tapping countermeasures in carbonate fracture-cavity reservoir

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