西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

曲率法致密砂岩储层裂缝预测

李志军1,2,张瀛1,2,窦煜3,李小刚1,2   

  1. 1. 重庆科技学院石油与天然气工程学院,重庆沙坪坝401331
    2.“复杂油气田勘探开发”重庆市重点实验室,重庆沙坪坝401331
    3. 桂林理工大学地球科学学院,广西桂林541004
  • 出版日期:2013-12-01 发布日期:2013-12-01
  • 通讯作者: 张瀛,E-mail:zyfbwz@163.com
  • 基金资助:

    中国石油科技创新基金研究项目(2012D–5006–0206);重庆市基础与前沿研究项目(cstc2013jcyjA90017)。

Fracture Prediction in Tight Sandstone Reservoir with Curvature Method

Li Zhijun1,2, Zhang Ying1,2, Dou Yu3, Li Xiaogang1,2   

  1. 1. School of Petroleum Engineering,Chongqing University of Science & Technology,Shapingba,Chongqing 401331,China
    2. Chongqing Key Laboratory of Complicated Oil & Gas Exploration and Development,Shapingba,Chongqing 401331,China
    3. College of Earth Sciences,Guilin University of Technology,Guilin,Guangxi 541004,China
  • Online:2013-12-01 Published:2013-12-01

摘要:

针对致密砂岩储层裂缝分布非均质性强、难以预测的问题,开展了致密低渗砂岩裂缝分布预测研究。以ZZ
油田S32
储层为实例,采用曲率法预测致密砂岩储层裂缝分布,分别选用样条函数法、趋势面拟合法、三点圆弧法、差分
法等4 种方法建立了计算岩层曲率模型,计算结果表明,4 种方法计算的曲率数值与区内气井测试无阻流量均具有良
好的正相关性,说明曲率法能很好地预测地下构造裂缝的分布范围,其中样条函数法相关系数最大,预测结果最优,具
有很好的应用前景。

关键词: 曲率法, 致密砂岩, 裂缝预测, 样条函数, 无阻流量

Abstract:

In view of the tight sand fractures with its relatively strong heterogeneity and the problem difficult to prediction,the
distribution prediction of natural fractures in tight and low permeability sandstone was discussed. In this paper,taking the S32
reservoir as an example in the ZZ Oilfield,the curvature method was used to predict fracture distribution law for target strata
by means of establishing 4 different curvature models,using 4 different calculating methods including spline function,trend
surface fitting,three-point circular arc,and calculus of differences,respectively. The calculation results by the 4 methods have
good positive correlations with open flow capacity in gas well testing in this study area,indicating that curvature method can
be used to predict the subsurface fracture distribution range. Among them,spline function shows the best prediction results.
therefore,the spline function curvature method has good application prospects in our study area.

Key words: curvature method, tight sandstone reservoir, fracture prediction, spline function, open flow capacity