水平气井非均匀产剖储层-井筒压降耦合模型  

Reservoir-wellbore Pressure Drop Coupling Model with Non-uniform Production Profile in Horizontal Gas Wells

作　　者：谭晓华 汪盛龙 孙志扬 王大江 王新强[3] 刘承佚 TAN Xiao-hua;WANG Sheng-long;SUN Zhi-yang;WANG Da-jiang;WANG Xin-qiang;LIU Cheng-yi(College of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu 610500, China;Jianghan Oil Field Petroleum Engineering Technology Research Institute, Wuhan 430000, China;Qinghai Oil Field Downhole Operation Company, Haixi Mongolian and Tibetan Autonomous Prefectur 816100, China;Southwest Oil and Gas Field Shunan Gas Mine, Luzhou 646000, China)

机构地区：[1]西南石油大学石油与天然气工程学院,成都610500 [2]江汉油田石油工程技术研究院,武汉430000 [3]青海油田井下作业公司,海西蒙古族藏族自治州816100 [4]西南油气田蜀南气矿,泸州646000

出　　处：《科学技术与工程》2022年第4期1416-1423,共8页Science Technology and Engineering

基　　金：中国石油天然气股份有限公司-西南石油大学“创新联合体”科技合作项目(2020CX010402)。

摘　　要：为了准确得到非均质储层水平气井井筒内压力分布情况,结合水平井筒变质量流的压降公式、裂缝渗流的产能公式和产剖测试分析。建立了水平气井非均匀产剖储层-井筒压降耦合模型,通过微元法将非均质储层转化为均质储层求解模型。该模型将井筒水平段压降分为环空回流段和套管变质量流段两部分压降进行计算,同时考虑了摩擦压降、加速度压降和重力压降的影响。结果表明:油管鞋为井筒水平段压力最低点,从油管鞋位置向水平段两端压力逐渐增加。随着油管下深和产气产水量的增加,水平段油管内压力逐渐增加,环空及无油管段压力也随之增加,即生产所需的最低压力逐渐升高。利用F页岩气田气井真实数据进行实例计算验证了模型的正确性,可以用于指导现场实际开发。In order to accurately obtain the pressure distribution of the horizontal well wellbore in heterogeneous reservoir,the re-servoir-wellbore pressure drop coupling model of horizontal wells for heterogeneous reservoir was established by combining with the pre-ssure drop equation of wellbore variable mass,the productivity formula and production profile test analysis.The model was solved by employing wellbore discrete element,which can transform heterogeneous reservoir as homogeneous reservoir.Since the effects of friction pressure drop,acceleration pressure drop and gravity pressure drop were considered,the model was calculated by dividing the wellbore pressure drop into two section that include annular reflux section and casing variable mass flow section.The results show that the tubing shoe is the lowest pressure point the horizontal wellbore,and the pressure increases gradually from the tubing shoe to both ends of the horizontal section.Pressure of the in the horizontal section,annulus and tubing free section increase with the increase of tubing depth and gas-water production,which indicates that the minimum pressure required for production increases gradually.The model and analysis method is verified by the F shale gas well field data,which can provide guide for actual development of heterogeneous shale gas reservoirs.

关 键 词：井筒压降 压裂水平井 页岩气 产剖测试 储层井筒耦合 

分 类 号：TE312[石油与天然气工程—油气田开发工程]