地球物理学进展 ›› 2018, Vol. 33 ›› Issue (2): 808-814.doi: 10.6038/pg2018BB0096

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

基于岩石物理相的泥质砂岩储层含水饱和度计算方法

胡向阳(),袁伟(),汤翟,陈嵘,杨毅   

  1. 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:2017-08-01 修回日期:2018-02-11 出版日期:2018-04-20 发布日期:2018-07-18
  • 通讯作者: 袁伟 E-mail:huxy@cnooc.com.cn;yuanwei12@cnooc.com.cn
  • 基金资助:
    “十三五”国家科技重大专项“南海西部海域低渗油藏勘探开发关键技术”(2016ZX05024-006)

Calculation method of shaly sands reservoir water saturation based on petrophysical facies

Xiang-yang HU(),Wei YUAN(),Di TANG,Rong CHEN,Yi YANG   

  1. Research Institute of Zhanjiang Company, CNOOC Limited, Guangdong Zhanjiang 524057, China
  • Received:2017-08-01 Revised:2018-02-11 Online:2018-04-20 Published:2018-07-18
  • Contact: Wei YUAN E-mail:huxy@cnooc.com.cn;yuanwei12@cnooc.com.cn

摘要:

涠洲M油田位于北部湾盆地涠西南凹陷,研究区岩性复杂,储层孔隙结构差异较大.在双对数坐标下,储层电阻率增大指数随含水饱和度变化关系呈现弯曲现象,且关系较为分散,给区域含水饱和度求解带来一定困难.研究从岩石导电机理出发,实际模拟分析了弯曲现象产生的原因及影响因素,曲线弯曲程度随毛管束缚水孔隙、黏土束缚水孔隙的增大而增大.在此认识的基础之上,根据常规物性分析资料将区域储层类型划分为五类,采用分类回归的方法获取了五类储层的岩电参数,并推导建立了区域含水饱和度精细解释模型,通过与岩心实验分析束缚水饱和度进行对比,验证了新方法的正确性与适用性,对区域油气勘探开发具有一定的实用价值和指导意义.

关键词: 岩石物理相, 泥质砂岩储层, 导电机理, 含水饱和度

Abstract:

Wei Zhou M oilfield is located in Weixinan depression of Beibuwan basin. The reservoir pore structure difference is big and lithology is complex in the study area. The relationships between water saturation vs. reservoir resistivity index present bending phenomenon and scatter with double logarithmic coordinates. Starting from the rock conductive mechanism, actual simulation has been done to analyze the causes and impact factors of the bending phenomenon. A conclusion has been achieved that the curve bending degree increases with the increase of capillary bound water porosity and clay bound water porosity. In view of this, the reservoir type in the study area has been divided into five categories according to conventional petrophysical analysis data.Besides,rock parameters of every kind of reservoir have been obtained by the method of classification and fine water saturation interpretation model has been established through deriving. Through comparing with actual core experimental irreducible water saturation, verified the correctness and applicability of the new method, which is of practical value and guiding significance for regional oil and gas exploration and development.

Key words: petrophysical facies, shaly sands reservoir, conductive mechanism, water saturation

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