页岩气藏压裂水平井产能计算及其影响因素  

Productivity calculation and its influencing factors of fractured horizontal well in shale gas reservoir

作　　者：宋彦志 杨倩 任哲雨 陶永富 廖鸿辉 乔梁 SONG Yanzhi;YANG Qian;REN Zheyu;TAO Yongfu;LIAO Honghui;QIAO Liang(Chad Co Ltd of PetroChina Yumen Oilfield Company,Jiuquan 735000,China;Exploration Department of PetroChina Yumen Oilfield Company,Jiuquan 735000,China;Laojunmiao Oil Production Company of PetroChina Yumen Oilfield Company,Yumen 735008,China;Research Institute of Exploration and Development of PetroChina Yumen Oilfield Company,Jiuquan 735000,China)

机构地区：[1]中国石油玉门油田公司乍得有限责任公司,甘肃酒泉735000 [2]中国石油玉门油田公司勘探部,甘肃酒泉735000 [3]中国石油玉门油田公司老君庙采油厂,甘肃玉门735008 [4]中国石油玉门油田公司勘探开发研究院,甘肃酒泉735000

出　　处：《大庆石油地质与开发》2023年第3期158-166,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“页岩地层动态随机裂缝控制机理与无水压裂理论”(51490653)。

摘　　要：为了研究页岩气藏压裂水平井生产动态和预测水平井产量,基于双重介质和离散裂缝模型,利用有限差分求解方法,建立页岩气藏压裂水平井数值计算模型。从储层参数、布缝模式和裂缝形态3个方面,对页岩气藏压裂水平井生产动态进行研究。结果表明:微观流动机理的准确表征对气井产量计算有着重要影响;Langmuir体积越大,基质解吸能力越强,气井稳产阶段产量越高;应力敏感系数越大,裂缝导流能力降低越快,气井产量递减速度越快;U形布缝模式气井产量要大于反U形布缝和锯齿形布缝,弯曲裂缝气井产量要大于平直裂缝,裂缝的分布特点和形态特征对压裂水平井产量计算有着显著影响。研究结果为优化和提高页岩气井产能提供了理论支撑。To study production performance of fractured horizontal well in shale gas reservoir and predict production of horizontal well,based on dual medium and discrete fracture model,numerical calculation model of fractured horizontal well in shale gas reservoir is established by using finite difference method.Production performance of fractured horizontal well in shale gas reservoir is studied in 3 aspects:reservoir parameters,fractures distribution pattern and fractures geometry.The results show that accurate characterization of micro-flow mechanism has much impact on production calculation of gas well.The larger the Langmuir volume is,the stronger the matrix desorption capacity is,and the higher the production in stable production stage of gas well is.The higher the stress sensitivity coefficient is,the faster the fracture conductivity decreases and the faster the gas well production decreases.Gas well production of U-shaped fractures model is higher than that of reversed U-shaped fractures and zigzagged fractures,and gas well production of tortuous fractures is higher than that of straight fractures.Distribution and morphological characteristics of fractures have significant impact on production calculation of fractured horizontal well.The research provides theoretical support for optimizing and improving productivity of shale gas wells.

关 键 词：页岩气藏 压裂水平井 产能模型 有限差分 流动表征 

分 类 号：TE348[石油与天然气工程—油气田开发工程]