双孔双渗油藏压裂井产量递减分析研究  

STUDY ON RATE DECLINE OF WELLS WITH A VERTICAL FRACTURE IN DUAL-POROSITY AND DUAL PERMEABILITY RESERVOIR

作　　者：蔡明金[1,2] 张福祥[3] 杨向同[3] 彭建新[3] 罗春树[3] 

机构地区：[1]西南石油大学博士后流动站,四川成都610500 [2]中石油塔里木油田分公司博士后工作站,新疆库尔勒841000 [3]中石油塔里木油田分公司,新疆库尔勒841000

出　　处：《新疆石油天然气》2013年第1期51-56,7,共6页Xinjiang Oil & Gas

基　　金：国家科技重大专项项目"塔里木盆地海相碳酸盐岩资源潜力;有利勘探区带评价与目标优选研究"(编号2011ZX05004-004)的资助

摘　　要：针对层状油气藏生产问题,建立并求解了考虑裂缝表皮系数的双孔双渗油藏压裂井产量递减数学模型,运用Stefest数值反演绘制了Blasingame产量递减特征曲线,最后对产量递减典型曲线特征及参数敏感性进行了分析。研究表明,双孔双渗油藏与双重介质油藏有限导流垂直裂缝井产量递减典型曲线形态具有相似性,但在窜流过渡段,双孔双渗油藏的曲线形态不仅受储容比ω、窜流系数λ影响,还受地层系数比χ影响。并且储容比ω、窜流系数λ及地层系数比χ大小也影响在产量递减典型曲线上能否反映出压裂井特征。最后用实例验证了该方法的正确性。In order to solve the production problem for wells in layered oil and gas reservoirs,the mathematical models for single well with a vertical fracture in dual permeability(two layers reservoir) are established,and the mathematical models are solved using Laplace transformation.Then,using Stefest numeric inversion,the rate decline Blasingame type curves of single well in dual permeability reservoirs were drawn,and the characteristic of curve and influence factors were discussed.The results indicated that the typical rate decline curve characteristics of single well with a vertical fracture in dual-porosity and dual-permeability reservoir are similar,but the latter is also affected by formation coefficient ratio.And the crack characteristics of fractured well are decided on the value of interporosity flow coefficient,storativity-ratio and formation coefficient ratio.A real example of a layered reservoir is illustrated.

关 键 词：双孔双渗油藏 垂直裂缝 压裂 有限导流 Blasingame 产量递减 

分 类 号：TE331[石油与天然气工程—油气田开发工程]