岩性油气藏 ›› 2020, Vol. 32 ›› Issue (6): 129–137.doi: 10.12108/yxyqc.20200612

• 勘探技术 • 上一篇    下一篇

碳酸盐岩裂缝性储层常规测井评价方法

任杰   

  1. 中国石化中原油田分公司 勘探开发研究院, 郑州 450000
  • 收稿日期:2019-12-23 修回日期:2020-03-15 出版日期:2020-12-01 发布日期:2020-10-30
  • 作者简介:任杰(1984-),男,硕士,高级工程师,主要从事油气田开发及测井地质方面的研究工作。地址:(450000)河南省郑州市郑东新区绿地原盛国际2号楼3单元。Email:446104712@qq.com。
  • 基金资助:
    中石化“十条龙”项目“超深高含硫气田提高采收率技术”（编号：P18062）资助

Conventional logging evaluation method for carbonate fractured reservoir

REN Jie   

  1. Research Institute of Exploration and Development, Zhongyuan Oilfield Company, Sinopec, Zhengzhou 450000, China
  • Received:2019-12-23 Revised:2020-03-15 Online:2020-12-01 Published:2020-10-30

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摘要： 哈萨克斯坦K油田石炭系KT-Ⅱ段储层为开阔台地相中低孔、特低渗灰岩储层，裂缝对改善储层的渗流能力至关重要，前人研究的利用常规测井资料评价碳酸盐岩储层裂缝的方法由于受裂缝产状、饱和度、泥浆侵入深浅等多方面因素的影响，存在确定性差、容易误判的缺陷。基于研究区目的层段有限的取心和电成像测井资料，结合孔隙型储层和裂缝-孔隙型储层测井响应特征，提出了利用补偿中子确定基块岩石电阻率与基块声波时差，再比较二者与深侧向电阻率、声波时差的差异特征，进而综合识别储层不同产状裂缝发育段，最后建立了裂缝孔隙度、次生孔隙度、裂缝渗透率、总渗透率等储层参数的测井解释模型，实现了利用常规测井资料对碳酸盐岩油藏储层的裂缝识别及参数定量评价。该方法应用的测井综合评价成果与取心物性分析、生产动态情况能够更好地匹配，为该类油藏的合理高效开发提供了依据。

关键词: 裂缝-孔隙型储层, 基块岩石电阻率, 基块声波时差, 裂缝识别, 裂缝孔隙度, 裂缝渗透率

Abstract: The reservoir of KT-Ⅱmember of Carboniferous in K oilfield of Kazakhstan is a limestone reservoir with medium low porosity and ultra-low permeability in open platform facies. Fractures are very important to improve the seepage capacity of the reservoir. The methods of using conventional logging data to evaluate fractures in carbonate reservoir studied by predecessors is of poor certainty and easy to be influenced by many factors such as fracture occurrence,saturation and mud invasion depth. Based on the limited coring and electrical imaging logging data of the target interval in the study area,combined with the study of logging response characteristics of pore reservoir and fracture-pore reservoir,a method was proposed to determine the resistivity of base block rock and acoustic time difference of base block by using compensated neutron logging. By comparing the difference characteristics of these two parameters with deep lateral resistivity and acoustic time difference respectively,fracture development sections with different occurrence in reservoirs were comprehensively identified,then the logging interpretation models of fracture porosity,secondary porosity,fracture permeability,total permeability were established,realizing and the fracture identification and parameter quantitative evaluation of carbonate reservoir by using conventional logging data. The comprehensive evaluation results of logging applied by this method can better match the coring physical property analysis and production performance,which provides a basis for reasonable and efficient development of this kind of reservoir.

Key words: fracture-pore reservoir, rock resistivity of base block, acoustic time difference of base block, fracture identification, fracture porosity, fracture permeability

中图分类号: 

  • TE122
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