地球物理学进展 ›› 2012, Vol. ›› Issue (4): 1624-1632.doi: 10.6038/j.issn.1004-2903.2012.04.040

• 应用地球物理 • 上一篇    下一篇

页岩气地球物理测井评价综述

郝建飞, 周灿灿, 李霞, 程相志, 李潮流, 宋连腾   

  1. 中国石油勘探开发研究院, 北京 100083
  • 收稿日期:2011-08-11 修回日期:2011-11-10 出版日期:2012-08-20 发布日期:2012-08-20
  • 作者简介:郝建飞,男,1987年1月生,山东潍坊人,现为中国石油勘探开发研究院在读硕士研究生,研究方向为页岩气测井解释评价. (E-mail:haojianfei2005@yahoo.com.cn)
  • 基金资助:

    国家油气重大专项"复杂储层油气测井解释理论方法与处理技术(2011ZX05020-008)"资助.

Summary of shale gas evaluation applying geophysical logging

HAO Jian-fei, ZHOU Can-can, LI Xia, CHENG Xiang-zhi, LI Chao-liu, SONG Lian-teng   

  1. Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:2011-08-11 Revised:2011-11-10 Online:2012-08-20 Published:2012-08-20

摘要: 页岩气是指生成、储集和封盖均发生于页岩体系中,或游离于基质孔隙和天然裂缝中,或吸附于有机质和粘土矿物表面,或溶解于沥青和水中,在一定地质条件下聚集成藏并具有商业价值的生物成因和/或热解成因的天然气.在页岩气勘探开发中,地球物理测井是识别、评价页岩气储层并为后期完井提供指导参数的重要手段.页岩气属于极低孔极低渗的范畴,且具有很强的非均质性和各向异性,常规油气藏测井解释评价方法已不再适用,必须建立新的页岩气测井解释评价体系才能够对页岩气藏做出准确评价.评价页岩气藏的潜力涉及对多种因素正反面影响的权衡,包括页岩矿物组分和结构、粘土含量及类型、干酪根类型及成熟度、流体饱和度、吸附气和游离气存储机制、埋藏深度、温度和孔隙压力等.其中,孔隙度、总有机碳含量和含气量等对于确定页岩储层是否具有进一步开发价值非常重要.本文针对国外尤其是美国近期页岩气勘探开发的现状进行了广泛的文献调研,综述当前国外页岩气地球物理测井技术的发展现状,针对勘探开发的不同阶段介绍常用的含气页岩的测井系列,然后总结页岩气测井响应特征,并详细论述了页岩气储层评价方法及储层评价的重要参数,包括有机碳含量、岩石矿物组分及含量、孔隙度、含气量及岩石力学参数,最后提出我国页岩气地球物理测井研究存在的问题和发展趋势.

Abstract: In gas shale, the gas is generated in place; the shale acts as the source rock, the reservoir and the capping formation. Part of the gas is stored in matrix porosity and fracture as free gas, the other part is adsorbed in the surface of organic and clay as adsorbed gas, another part is dissolved in bitumen and water as dissolved gas. Shale gas systems are of two distinct types: biogenic and/or thermogenic. The gas accumulated under some geologic condition as a commercial unconventional reservoir. In the exploration and exploitation of shale gas, geophysical logging is an important means for its identification, evaluation and provides some effective parameters to direct the well completion. Gas shale is characterized by its extremely low porosity, extremely low permeability, strong heterogeneity and anisotropy, thus it is unsuitable for well logging interpretation of shale gas applying interpretation means of conventional reservoir, and it is necessary to reconstruct a new system for well logging interpretation of shale gas. Evaluating the reservoir potential of a gas shale involves weighing positive or negative contributions from a variety of factors, including shale mineralogy and texture, the content and types of clay, kerogen type and maturity, fluid saturation, adsorbed and free gas storage mechanisms, burial depth, temperature and pore pressure, etc. In particular, porosity, organic content and gas content are important for determining whether a shale shows potential for further development. Based on the comprehensive research of exploration and exploitation of shale gas abroad recently, especially America, this paper summarizes the present situation of shale gas exploration and exploitation applying geophysical logging and made an analysis of data acquisition series of well logging in the view of different stage of exploration. As to well logging identification of shale gas, this paper summarizes the logging response of gas shale. Then the paper discussed some important parameters and its evaluation methods of shale gas using geophysical logging in detail, including total organic carbon, mineral types and content of formation, porosity, gas content (free gas and adsorbed gas) and some rock mechanical parameters. In the last, this paper puts forward several questions about the research of geophysical logging for shale gas in China, then discusses the development trend of geophysical logging.

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