不规则裂缝分段水平气井产能预测新方法  

A new method for productivity prediction of segmented horizontal gas wells with irregular fractures

作　　者：李金泽 徐文娟 冯青 孙艳妮 李胜胜 李啸南 LI Jinze;XU Wenjuan;FENG Qing;SUN Yanni;LI Shengsheng;LI Xiaonan(Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin 300450,China;China OilfieldService Limited Production Optimization R&D Institute,Tianjin 300459,China;Guangdong Nanyou Service Co.,Ltd.,Tianjin Branch,Tianjin 300450,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300450 [2]中海油服油田生产研究院,天津300459 [3]广东南油服务有限公司天津分公司,天津300450

出　　处：《石油化工应用》2022年第7期11-14,共4页Petrochemical Industry Application

基　　金：国家自然科学基金青年科学基金,项目编号:51804048。

摘　　要：压裂水平井开采海上低渗油气田具有直井无法比的优势,但海上压裂作业成本高、风险大,对压裂产能预测的精度要求也高。所以本文将每条裂缝和水平段分成若干微元段,每个微元段看作一个点汇或线汇,并考虑气体紊流、井筒摩阻、启动压力梯度、压敏等影响,将水平井筒流动和裂缝渗流耦合,建立多裂缝压裂水平井产能模型并实际应用。研究结果表明本文产能模型预测结果较为准确,并且通过产能预测能进行裂缝参数优化,便于改进水平井压裂方案。The exploitation of offshore low permeability oil and gas fields by fracturing horizontal wells has incomparable advantages over vertical wells,but offshore fracturing operation has high cost and risk,and requires high accuracy of fracturing productivity prediction.Therefore,this paper divides each fracture and horizontal section into several micro element sections,and each micro element section is regarded as a point or line collection.Considering the effects of gas turbulence,wellbore friction,start-up pressure gradient and pressure sensitivity,the horizontal wellbore flow and fracture seepage are coupled,and the productivity model of multi fracture fracturing horizontal well is established and applied in practice.The research results show that the prediction results of the productivity model in this paper are more accurate,and the fracture parameters can be optimized through productivity prediction,which is convenient to improve the fracturing scheme of horizontal wells.

关 键 词：压裂水平井 不规则裂缝 渗流耦合 产能预测 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]