压裂水平井干扰压力分析模型  

Interference pressure analysis model of fractured horizontal well

作　　者：王为林[1] 安宏亮 WANG Weilin;AN Hongliang(No.7 Oil Production Plant, Changqing Oilfield Company, PetroChina, Xi′an 710086, China)

机构地区：[1]中国石油长庆油田分公司第七采油厂

出　　处：《断块油气田》2019年第4期501-505,共5页Fault-Block Oil & Gas Field

摘　　要：为了分析井间干扰现象,建立了多级压裂水平井多井干扰试井解释模型,综合分析了注水井、采油井导致的井间干扰特征。模型典型图版包括8个渗流阶段。其中干扰段分为2段:第1干扰流阶段的压力导数曲线呈现上升趋势,随着产量增加,曲线上升幅度也增加;注水井主要影响第2干扰流阶段,压力导数曲线下降程度随着注水量的增加而增加;当总注水量小于生产井总产量时,两阶段之间出现阶梯状下降情况,第2干扰流阶段压力导数最后趋于稳定;当总注水量大于生产井总产量时,第2干扰流阶段压力导数呈现下掉状态;干扰流阶段持续时长与激动井和水平井的间距呈反比关系。研究结果为确定井间连通情况提供了重要方法。In order to analyze the phenomenon of well interference, an interference test analysis model of multiple fractured horizontal well was built, which considers the interference from adjacent injection wells and production wells on well testing behaviors. The model′ s type curve plots include eight flow regimes, and the interference flow regime can be divided into two regimes. In the first interference flow regime, pressure derivative curve will rise, the higher the production rate of the adjacent production wells, the larger the magnitude of the rise on pressure derivative curve. The injection well influence the second interference flow regime obviously, the higher the injection rate of the adjacent injection wells, the larger the magnitude of the decline on pressure derivative curve. When the total injection volume is smaller than the production of production wells, pressure derivative curve will descend and behave as a two-steps horizontal line. Finally, the pressure derivative of the second interference flow will become stable. When the total injection is bigger than the production of production wells, pressure derivative curve will descend all the time. Besides, the period of the interference flow regime is inversely proportional to the distance between fractured horizontal well and adjacent active wells. This work provides an important method for determining the connectivity among wells.

关 键 词：低渗透油藏 压裂水平井 干扰试井模型 注水井 采油井 典型曲线图版 

分 类 号：TE312[石油与天然气工程—油气田开发工程]