基于水气比计算的低对比度储层流体性质识别

doi:10.12108/yxyqc.20210414

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (4): 128–136.doi: 10.12108/yxyqc.20210414

基于水气比计算的低对比度储层流体性质识别

赵军¹, 韩东¹, 何胜林², 汤翟², 张涛¹

1. 西南石油大学地球科学与技术学院, 成都 610500;
2. 中海石油 (中国) 有限公司湛江分公司研究院, 广东湛江 524057

收稿日期:2020-11-07 修回日期:2021-01-28 出版日期:2021-08-01 发布日期:2021-08-06
第一作者:赵军(1970-),男,博士,教授,主要从事岩石物理及其解释与评价方面的研究和教学工作。地址:(610500)四川省成都市新都区新都大道8号。Email:zhaojun_70@126.com。
基金资助:
中海石油（中国）有限公司湛江分公司科技项目“文昌9、10区低孔低渗储层测井精细评价及潜力分析”（编号：CCL2019ZJFN0823）资助

Identification of fluid properties of low contrast reservoir based on water-gas ratio calculation

ZHAO Jun¹, HAN Dong¹, HE Shenglin², TANG Di², ZHANG Tao¹

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2. Research Institute of Zhanjiang Company, CNOOC, Zhanjiang 524057, Guangdong, China

Received:2020-11-07 Revised:2021-01-28 Online:2021-08-01 Published:2021-08-06

摘要/Abstract

摘要： 珠江口盆地文昌A凹陷低对比度储层电性与含油气性关系复杂，气、水层测井响应特征接近，仅用常规测井识别流体性质较困难。为了准确识别该类气藏流体性质，以相渗资料、毛细管压力等实验数据为基础，通过不同含水饱和度下的相渗模型及分流率方程，建立了水气比的计算模型，结合生产动态及测试资料，建立了水气比流体的识别标准，并依据该标准确定了文昌A凹陷储层流体性质。结果表明：①计算水气比与实际生产数据符合度高，流体解释结果准确率达到92%，有效地提高了低对比度储层流体识别的准确率；②生产测试资料对该方法流体性质识别的准确性起决定作用。该方法有利于同类储层的开发。

关键词: 低对比度, 水气比, 含水饱和度, 流体识别, 测井响应, 珠江口盆地

Abstract: The electrical properties of low contrast reservoir in Wenchang A sag in the Pearl River Mouth Basin have a complicated relationship with oil and gas properties. The logging response characteristics of gas and water layers are similar,so it is difficult to identify fluid properties only by conventional logging. In order to accurately identify the fluid properties of this type of gas reservoir,based on the phase permeability data,capillary pressure and other experimental data,the calculation model of the water-gas ratio was established through the phase permeability model under different water saturations and the diversion rate equation. Combined with production and test data,the identification standard of fluid with different water-gas ratio was established,and the reservoir fluid properties of Wenchang A sag were determined according to this standard. The results show that：（1）The calculated water-gas ratio is highly consistent with the actual production data,and the accuracy of the fluid interpretation results reaches 92%,which effectively improves the accuracy of fluid identification in low-contrast reservoirs.（2）The production test data plays a decisive role in the accuracy of the fluid property identification. This method is beneficial to the development of similar reservoirs.

Key words: low contrast, water-gas ratio, water saturation, fluid identification, logging response, Pearl River Mouth Basin

中图分类号:

P618.13

赵军, 韩东, 何胜林, 汤翟, 张涛. 基于水气比计算的低对比度储层流体性质识别[J]. 岩性油气藏, 2021, 33(4): 128–136.

ZHAO Jun, HAN Dong, HE Shenglin, TANG Di, ZHANG Tao. Identification of fluid properties of low contrast reservoir based on water-gas ratio calculation[J]. Lithologic Reservoirs, 2021, 33(4): 128–136.

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基于水气比计算的低对比度储层流体性质识别

Identification of fluid properties of low contrast reservoir based on water-gas ratio calculation

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