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| 福山凹陷低阻油层成因分析及流体识别方法 |
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魏博1,2,谢然红1,赵建斌2,张陈珺2,方朝强2,魏彦巍3,夏阳2
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(1.中国石油大学(北京)地球物理学院,北京 102249;2.中国石油集团测井有限公司,陕西西安 710077;3.中国石油集团东方地球物理勘探有限责任公司大庆物探二公司,吉林松原 138000)
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| 摘要: |
| 福山油田涠洲组广泛发育低阻油层,储层低阻成因机制认识不清与储层流体准确识别是制约涠洲组高效勘探开发的主要难题。以花场、白莲、永安地区为研究对象,综合分析岩石物理实验、地层水分析化验、测井、试油等资料,围绕地层水矿化度、淡水钻井液侵入、束缚水饱和度、黏土附加导电性、含油饱和度5方面因素展开分析研究。明确不同地区低阻主控因素,深入分析不同成因机制的岩石物理和测井响应特征,针对性构建综合储集指数、侵入因子、电阻增大率等流体敏感测井评价参数。结合测井解释及生产试油情况,建立相应流体识别图版,应用于涠洲组27口井58个试油层位。结果表明,流体识别符合率由76%提高到84%,有效提高了涠洲组低阻油层流体识别准确率。 |
| 关键词: 福山凹陷 低阻油层 流体识别 综合储集指数 侵入因子 |
| DOI：10.3969/j.issn.1673-5005.2024.02.006 |
| 分类号::TE 122 |
| 文献标识码:A |
| 基金项目:中国石油天然气集团有限公司科学研究与开发项目(2023ZZ05-06);中国石油集团测井有限公司科学研究与技术开发项目(CNLC2022-08B01) |
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| Analysis of genesis of low resistivity reservoirs and method of fluid identification in Fushan Sag |
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WEI Bo1,2, XIE Ranhong1, ZHAO Jianbin2, ZHANG Chenjun2, FANG Chaoqiang2, WEI Yanwei3, XIA Yang2
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(1.College of Geophysics in China University of Petroleum(Beijing), Beijing 102249, China; (;2.China Petroleum Logging Comapany Limited, Xi 'an 710077, China;3.Bureau of Geophysical Prospecting INC,China National Petroleum Corporation, Daqing Geophysical Second Company, Songyuan 138000, China)
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| Abstract: |
| Low-resistivity reservoirs have been extensively developed in Weizhou Formation of Fushan Oilfield. The unclear understanding of the mechanisms behind the formation of low-resistivity reservoirs and the accurate identification of reservoir fluids pose significant challenges to the efficient exploration and development of Weizhou Formation. In this study, the Huachang, Bailian and Yong 'an areas are selected as research targets. We comprehensively analyze data from rock physics experiments, formation water, well logging, and oil testing to investigatefive factors:formation water salinity, light cement slurry intrusion, irreducible water saturation, additional conductivity of clay, and oil saturation. By identifying the main controlling factors of low resistance in different areas, we deeply analyze the petrophysical and logging response characteristics of different genetic mechanisms and construct fluid-sensitive logging evaluation parameters such as comprehensive reservoir index, invasion factor,and resistance increase rate.Combining logging interpretation and production testing,we establish corresponding fluid identification charts and apply them to 58 test horizons in 27 wells in Weizhou Formation. The results demonstrate that the coincidence rate of fluid identification increases from 76% to 84%, effectively enhancing the accuracy of fluid identification in the low-resistance reservoirs of Weizhou Formation. |
| Key words: Fushan Sag low-resistivity reservoirs fluid recognition comprehensive reservoir index invasive factor |
