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。
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 S3 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.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第6期57-63,共7页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
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)
关键词
曲率法
致密砂岩
裂缝预测
样条函数
无阻流量
curvature method
tight sandstone reservoir
fracture prediction
spline function
open flow capacity
