摘要
鄂尔多斯盆地苏里格气田属于典型的致密砂岩储层,裂缝发育程度直接影响到水平气井体积压裂效果和后期产能建设,对天然裂缝的正确描述意义重大。以苏X气田为例,利用深浅双侧向电阻率幅度差数据及其他常规测井资料,运用分形理论中R/S分析方法对目的层段裂缝发育程度进行了定量识别,定量分析了分形维数与裂缝密度的关系,并探讨了裂缝分形维数与气井初期产能的关系。经钻井岩心、动态等验证,吻合效果良好,表明在苏里格气田,应用R/S分析方法对单井裂缝发育程度进行定量描述行之有效,分形维数值越大,天然裂缝越发育,气井压裂效果也就越好。
Sulige Gasfield in Ordos Basin belongs to the typical tight sand reservoirs,the fracture development degree directly affects the volume fracturing effects of the horizontal well and the later productivity construction,so the correct description of the natural fracture is of great significance. Taking Su-X Gasfield as an example,with the help of the amplitude difference data between the deep and shallow investigate double lateral resistivity（ Rdand Rs）,and other conventional logging data,and moreover the analyzing method of R/S,the fracture developed degree was quantitatively identified for the target intervals,the relationships between the fractal dimension and fracture density were analyzed quantitatively,and at the same time,the fracture fractal dimension and gas-well initial productivity was explored. Tested by the data of the drilling cores and performances available,the coincidence effects are much better,these achievements show that R/S analyzing method is feasible to quantitatively characterizethe development degree of the individual well fractures,the bigger the fractal dimension value is,the more developed the natural fracturewill be,so are the effects of the gas-well fracturing.
作者
杨昕谅
YANG Xinliang(School of Petroleum Engineering, Northeast Petroleum University , Daqing 163318, China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2017年第4期142-146,共5页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目"基于应力-渗流-损伤多场耦合的清水压裂机理及储层筛选研究"(51274069)
国家自然科学基金项目"页岩局部脆性表征与压裂裂缝交互耦合演化机制研究"(51574088)
关键词
分形
R/S分析方法
常规测井曲线
天然裂缝
裂缝识别
fractal
R/S analysis
conventional log curve
natural fracture
fracture identification
