低渗透裂缝性油藏调剖选井无因次压力指数决策方法  

A new decision method based on dimensionless pressure index for profile control of low-permeability fractured reservoirs

作　　者：冯其红 王森 陈存良 徐春梅[2] 陈荣环[2] 刘保彻[2] 

机构地区：[1]中国石油大学石油工程学院,山东青岛266580 [2]中国石油长庆油田公司油气工艺研究院,陕西西安710018

出　　处：《石油学报》2013年第5期932-937,共6页Acta Petrolei Sinica

基　　金：国家重大科技专项(2011ZX05013-005;2011ZX0524-002-002);教育部"长江学者和创新团队发展计划"(IRT1294);国家自然科学基金项目(No.51174222);中央高校科研业务费专项资金项目(13CX06028A)资助

摘　　要：从低渗透裂缝性油藏的特点出发,分析了将压力指数(PI)决策方法用于低渗透裂缝性油藏调剖选井时遇到的问题,并在PI值的基础上提出了一种新的组合参数——无因次PI值。在考虑启动压力梯度和裂缝影响的条件下利用分形几何方法推导了无因次PI值的物理意义,其与储层原始地层系数和当前地层系数的比值成正比,且无因次PI值越小,储层渗流能力增大得越多,存在优势通道的可能性越大,就越需进行调剖。最后在此基础上建立了低渗透裂缝性油藏调剖选井无因次压力指数决策方法,通过将该方法应用于长庆油田五里湾一区,证明了其有效性。Based on the characteristics of low-permeability fractured reservoir, the problems encountered when applying Pressure Index （PI） decision making technology to profile control of the reservoir are analyzed. And a new parameter Dimensionless Pressure Index （DPI） is presented on the basis of PI. Moreover, the physical rationale of DPI is deduced with fractal geometry on condition that threshold pressure gradient and fractures are taken into account. DPIis found proportional to the ratio between the initial and [）resent formation conductivities of the reservoir. The smaller the DPI, the greater increment of reservoir seepage capacity, the more likely thief zone exists in the formation, thus the more the profile control is needed. Finally, a decision mak ing technology based on DPI is put forward for low permeability fractured reservoir, and applied to Wuliwan No. 1 Block in Chan^Qina oilfield.

关 键 词：低渗透 裂缝性油藏 调剖 压力指数 分形几何 决策方法 

分 类 号：TE357[石油与天然气工程—油气田开发工程]