南海东部西江油田低阻油层识别及主控因素研究

doi:10.3969/j.issn.1006-6535.2022.01.002

特种油气藏 ›› 2022, Vol. 29 ›› Issue (1): 10-14.DOI: 10.3969/j.issn.1006-6535.2022.01.002

南海东部西江油田低阻油层识别及主控因素研究

梁卫, 闫正和, 杨勇, 黄余金, 熊琪, 董毅夫

中海石油(中国)有限公司深圳分公司,广东深圳 518000

收稿日期:2021-03-20 修回日期:2021-11-05 出版日期:2022-02-25 发布日期:2023-01-10
作者简介:梁卫(1967—),男,教授级高级工程师,1989年毕业于江汉石油学院煤田油气地质与勘探专业,1994年毕业于成都理工学院煤田油气地质与勘探专业,获博士学位,现主要从事油气田勘探开发工作。
基金资助:
国家科技重大专项“近海大中型油气田形成条件及勘探技术”(2016ZX05024);中海石油(中国)有限公司深圳分公司科技项目“南海东部低渗储层产能评价与提升技术研究”(CCL2018SZPS0306)

Study on Identification and Main Controlling Factors of Low-resistivity Oil Reservoirs in Xijiang Oilfield, Eastern South China Sea

Liang Wei, Yan Zhenghe, Yang Yong, Huang Yujin, Xiong Qi, Dong Yifu

CNOOC Shenzhen Branch, Shenzhen, Guangdong 518000, China

Received:2021-03-20 Revised:2021-11-05 Online:2022-02-25 Published:2023-01-10

摘要/Abstract

摘要： 针对南海东部西江油田低电阻率油层形成原因复杂,低阻油层难以识别的问题,在综合分析测录井、岩心、扫描电镜、黏土矿物、岩石润湿性等矿场资料的基础上,提出了一种适合于西江油田的低阻油层评价和识别方法,修正了典型的阿尔奇公式,预测了潜在低阻油层储量,并进行了西江油田低阻油层主控因素分析。研究结果表明,西江油田低阻油层识别的主控影响因素为水润湿指数、阳离子交换量和束缚水饱和度。在此基础上利用修订的阿尔奇公式准确预测了南海东部西江油田储层的含油电阻率曲线下限从10 Ω·m下降至2 Ω·m,预计可增加可采储量为20×10⁴t。该研究对南海东部同类油田开发具有重要意义。

关键词: 低阻油层, 主控因素, 束缚水, 黏土矿物, 阿尔奇公式, 西江油田, 南海

Abstract: In view of the complex formation of low-resistivity oil reservoirs in Xijiang Oilfield, eastern South China Sea and the difficulty in identification of low-resistivity oil reservoirs, a method for evaluating and identifying low-resistivity oil reservoirs suitable for Xijiang Oilfield was proposed on the basis of comprehensive analysis of mineral field data such as well logging, cores, scanning electron microscopy, clay minerals, and rock wettability, typical Archie′s formula was modified, the reserves of potential low-resistance oil reservoirs were predicted, and the main controlling factors of low-resistance oil reservoirs in Xijiang Oilfield were analyzed. The results showed that the main controlling factors for the identification of low-resistant oil reservoirs in Xijiang Oilfield were wettability indicator, cation exchange capacity and irreducible water saturation. On this basis, the modified Archie′s formula was used to accurately predict that the lower limit of the resistivity curve of oil reservoirs in Xijiang Oilfield, eastern South China Sea to decrease from 10 Ω·m to 2 Ω·m by using the modified Archie′s formula, and the recoverable reserves were estimated to increase by 20×10⁴ t. The study has an important implication to the development of similar oil fields in eastern South China Sea.

Key words: low-resistance oil reservoir, main controlling factors, irreducible water, clay minerals, Archie′s formula, Xijiang Oilfield, South China Sea

中图分类号:

TE122

梁卫, 闫正和, 杨勇, 黄余金, 熊琪, 董毅夫. 南海东部西江油田低阻油层识别及主控因素研究[J]. 特种油气藏, 2022, 29(1): 10-14.

Liang Wei, Yan Zhenghe, Yang Yong, Huang Yujin, Xiong Qi, Dong Yifu. Study on Identification and Main Controlling Factors of Low-resistivity Oil Reservoirs in Xijiang Oilfield, Eastern South China Sea[J]. Special Oil & Gas Reservoirs, 2022, 29(1): 10-14.

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南海东部西江油田低阻油层识别及主控因素研究

Study on Identification and Main Controlling Factors of Low-resistivity Oil Reservoirs in Xijiang Oilfield, Eastern South China Sea

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