海上油田多层合采井试井模型研究与应用  

Development and application of well-test models for wells deployed for joint development of multiple layers in offshore oilfields

作　　者：陈晓明 张建民 王月杰 雷源 常会江 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《特种油气藏》2017年第1期119-123,共5页Special Oil & Gas Reservoirs

基　　金："十二五"中国海洋石油总公司重大项目"陆相砂岩油田优化注水技术研究"(CNOOC-KJ125ZDXM06LTD-02)

摘　　要：针对BZ油田部分定向井测试资料解释困难的问题,基于多层渗流物理模型,重构了描述多层渗流机理的数学模型,运用分离变量法得到各种混合边界条件下的井筒流量分布和井底压力瞬时解,并绘制了井底压力理论图版,理论图版曲线反应了4个主要的流动阶段:早期续流段、系统径向流段、单边界响应段和多边界混合响应段。其中,多边界混合响应阶段的曲线出现了"驼峰"和"凹子"的形态特征。以该理论图版为指导,对BZ油田疑难井的测试资料进行解释,得到了各储层物性参数和平均表皮系数,为低效井的治理提供了理论支持。研究成果对于海上油田多层合采井试井模型的应用具有重要推广意义。With regard to difficulties encountered during interpretation of test data in some direction wells drilled in the BZ Oilfield, mathematic models for description of muhi-layer seepage mechanisms have been re-constructed on bases of the muhi-layer seepage physical model. Through separation of variables, distribution of flow rates in the borehole and instantaneous bottom-hole pressures under various mixtures of marginal conditions can be determined. In addition, theoretical charts for bottom-hole pressures have been generated. These charts may reflect 4 major flow stages ： early after-flow, systematic radial flow, single-boundary response and muhi-boundary mixed responses. A- mong them, curves for multi-boundary mixed responses are characterized by ＂hump＂ and ＂concave＂ configura- tions. By using the theoretical chart, test data of some difficult wells in the BZ Oilfield have been interpreted to de- termine various reservoir physical parameters and average skin factor, and eventually may provide theoretical sup- port for management of low-efficiency wells. Relevant research conclusions may effectively promote application of well-test models for wells deployed for joint development of multiple layers in offshore oilfields.

关 键 词：多层合采 海上油田 渗流力学 数学模型 试井解释 BZ油田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]