异常高压特低渗透油藏试井分析及应用  

Well Test Analysis on Abnormal High-pressure and Low-permeability Reservoirs and Its Application

作　　者：高炎[1] 汤传意[1] 张海涛[1] 刘林[1] 李杰[1] 杨振中[1] 

机构地区：[1]中石油新疆油田分公司百口泉采油厂,新疆克拉玛依834000

出　　处：《长江大学学报（自科版）（中旬）》2016年第12期47-52,共6页Journal of Yangtze University(Nature Science Edition)

基　　金：国家科技重大专项(2016ZX05070-002)

摘　　要：近年来,准噶尔盆地环玛湖地区相继发现了多个异常高压特低渗透油藏,由于该类油藏存在孔喉细小、比表面积大、渗透率低、压敏性强的特点,渗流规律不遵循达西定律。为做好该区此类油藏的开发工作,以该区已经投入开发的玛2井区为例,在研究总结异常高压、特低渗透砂砾岩储层地质特征的基础上,分析历史不稳定试井曲线,确定该区油藏渗流遵循低速非达西渗流规律。以低速非达西渗流理论为基础,建立考虑启动压力梯度的低速非达西渗流试井解释模型。通过对实际测试资料的解释分析,获得真实的油层参数,确定了生产井的启动压力梯度大小及合理关测时间,评价了油井完善程度,对异常高压、特低渗透砂砾岩油藏的合理开发提供了可靠的依据。Many abnormal high pressure and low permeability reservoirs have been found out in recent years in Huanmahu Area of Junggar Basin.However their seepage law was not in accordance with Darcy's law because there existed the characteristics of small pore throat,large surface area,low permeability,strong pressure sensitivity.For the effective development of the reservoir,by taking the development Well Ma 2in the area for example,on the base of research on the geological features of abnormally high pressure,ultra-low permeability sandstone and conglomerate reservoirs,the transient well test curves in the history was analyzed,it was determined that the percolation in the reservoir should fellow the law of non-Darcy flow.Based on the law of low-speed non-Darcy flow,a low-speed non-Darcy flow well test interpretation model considering starting pressure gradient was established.By analyzing the actual well testing data,true reservoir parameters are obtained,the size of starting pressure gradient and reasonable observation time are determined.Simultaneously,the perfection degree of wells is evaluated and a reliable basis is provided for development of abnormal high pressure and low permeability reservoirs.

关 键 词：异常高压 特低渗透油气藏 低速非达西渗流 试井分析 

分 类 号：TE353.4[石油与天然气工程—油气田开发工程]