DOI: 10.1306/07031211017
Scopus记录号: 2-s2.0-84876119284
论文题名: Correction of invasion effects on well logs in Camisea gas reservoirs, Peru, with the construction of static and dynamic multilayer petrophysical models
作者: Gandhi A. ; Torres-Verdín C. ; Voss B. ; Gros F.S. ; Gabulle J.
刊名: AAPG Bulletin
ISSN: 0149-1694
EISSN: 1558-9424
出版年: 2013
发表日期: 2013
卷: 97, 期: 3 起始页码: 379
结束页码: 412
语种: 英语
Scopus关键词: Electrical resistivity
; Electrically conductive
; Irreducible water saturation
; Logging while drilling
; Mud-filtrate invasion
; Mud-filtrate invasion effects
; Petrophysical interpretation
; Stratigraphic framework
; Computer simulation
; Drilling
; Electric conductivity
; Electric logging
; Gas industry
; Magnetic resonance
; Pressure effects
; Separation
; Stratigraphy
; Multilayers
; capillary pressure
; electrical resistivity
; estimation method
; filtration
; geological record
; invasibility
; numerical model
; parameterization
; reservoir
; saturation
; simulation
; well logging
; Peru
; San Martin
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The concept of common stratigraphic framework was previously introduced to construct and cross-validate multilayer static and dynamic petrophysical models by invoking the interactive numerical simulation of well logs both before and after invasion. This article documents the successful implementation of the common stratigraphic framework concept to examine and quantify the effects of mud-filtrate invasion on apparent resistivity, nuclear, and magnetic resonance logs acquired in the San Martin, Cashiriari, and Pagoreni gas fields in Camisea, Peru. Conventional petrophysical interpretation methods yield abnormally high estimates of water saturation in some of the reservoir units that produce gas with null water influx. Such an anomalous behavior is caused by relatively low values of deep apparent electrical resistivity and has otherwise been attributed to the presence of clay-coating grains and/or electrically conductive grain minerals coupled with fresh connate water. Concomitantly, electrical resistivity logs exhibit substantial invasion effects as evidenced by the variable separation of apparent resistivity curves [both logging-while-drilling and wireline) with multiple radial lengths of investigation. In extreme cases, apparent resistivity logs stack because of very deep invasion. We diagnose and quantify invasion effects on resistivity and nuclear logs with interactive numerical modeling before and after invasion. The assimilation of such effects in the interpretation consistently decreases previous estimates of water saturation to those of irreducible water saturation inferred from core data. We show that capillary pressure effects are responsible for the difference in separation of apparent resistivity curves in some of the reservoir units. This unique field study confirms that well logs should be corrected for mudfiltrate invasion effects before implementing arbitrary shaly sand models and parameters thereof in the calculation of connate-water saturation. © 2013. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876119284&doi=10.1306%2f07031211017&partnerID=40&md5=75fcd6bd8c467cd15439490771062de1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13264
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Gandhi A.,Torres-Verdín C.,Voss B.,et al. Correction of invasion effects on well logs in Camisea gas reservoirs, Peru, with the construction of static and dynamic multilayer petrophysical models[J]. AAPG Bulletin,2013-01-01,97(3)