致密砂岩气藏气水两相产能预测新模型  

A New Gas-Water Two-Phase Productivity Prediction Model for Tight Sandstone Gas Reservoirs

作　　者：尹霜 蒋燕聪 赵锐 Yin Shuang;Jiang Yancong;Zhao Rui(Chengdu University of Technology,Chengdu 10059,China)

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《山东化工》2021年第4期128-132,共5页Shandong Chemical Industry

摘　　要：致密砂岩气藏作为目前极具潜力的非常规资源,准确预测其气井产能对致密砂岩气藏的开发具有重要意义。本文以致密砂岩气藏各井型压裂气井为研究对象,综合考虑压敏效应、启动压力梯度、气体滑脱效应、气水两相渗流以及压裂裂缝等因素,在渗流力学的基础上,根据保角变换、水电相似原理、气水相似渗流等原理,建立了致密砂岩气藏气水同产压裂直井、水平井及斜井的产能预测方程。计算结果表明,利用本文建立的新模型计算的无阻流量与气井产能测试无阻流量之间误差较小,证实了该模型具有较好的准确性。本文提出的新模型为致密砂岩气藏产能预测提供了新的解决思路。As an unconventional resource with great potential,accurate prediction of gas well productivity is of great significance for the development of tight sandstone gas reservoirs.In this paper,comprehensively considering pressure sensitive effect,start-up pressure gradient,gas slippage effect,gas-water two-phase seepage and fracturing cracks,various fracturing gas wells of tight sandstone gas reservoir are taken as the research object to establish the productivity prediction equations of gas-water co-production fractured vertical wells,horizontal wells and deviated wells by means of conformal mapping,water and electricity similitude principle,and gas-water percolation principle of similitude.The calculation results show that the error between the open flow rate calculated by the new model and the open flow rate measured by gas well productivity is small,which indicates that the model presented in this paper has good accuracy.The new model in this paper provides a novel solution for production prediction of tight sandstone gas reservoir.

关 键 词：致密砂岩气藏 压裂气井 气水两相 产能预测 

分 类 号：TE34[石油与天然气工程—油气田开发工程]