Completion and stimulation trends in North American unconventional plays and resulting impact on well productivity  

作　　者：Roman Galchenko Qing Liu Yan Gao Yu Liu David He Josh Zhang Huailiang Liu Xiaohua Ke 

机构地区：[1]CNPC USA,Houston TX 77042,USA [2]CNPC Engineering Technology R&D Company Limited,Beijing 102206,China [3]College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China

出　　处：《钻探工程》2021年第10期1-12,共12页Drilling Engineering

基　　金：This study was performed under a contract by CNPC USA.Authors would like to express their gratitude to CNPC USA management for its support and permission to publish the data as well as to IHS Markit for providing data for the research.

摘　　要：过去十年,非常规油气勘探开发在全球范围内大幅扩张。水平钻井和多级水力压裂技术也在不断地发展和创新,使得超长水平井成为可能。同时,因为压裂强度不断增加,作业者可以最大限度地提高储层接触面积和对储层的改造体积(SRV)。然而,完井优化方面的挑战仍然存在,作业者持续不断地尝试和试验各种完井与增产参数组合,以确保非常规油气藏开发的经济可行性。优选最佳的完井与增产参数组合是一项非常关键的任务,应结合油气田的具体储层特征进行优化。本文总结了2014—2020年间北美9个主要非常规油气藏的压裂增产趋势,包括Marcellus,Haynesville,Barnett,Utica,Bone Spring,Bakken,Wolfcamp Midland,Eagle Ford,Scoop/Stack。分析了各油气田几个关键的完井和增产参数的整体趋势,同时还评估了单个参数(如水平段压裂长度、支撑剂强度、段间距等)对井产能的影响。然后对比分析相应的初始井产量(90天平均初始产量),评估各个参数对产能的影响,从而确定每个完井参数的最佳范围,以实现产能最优化。Over the past decade,unconventional oil and gas exploration and development expanded considerably worldwide.Continuous technological progress and innovations in horizontal drilling and multi⁃stage hydraulic fracturing enabled extended⁃reach lateral wells,which coupled with high intensity multi⁃stage completions allowed operators to maximize both reservoir contact area and stimulated reservoir volume(SRV).However,challenges in completion optimization still remain and operators continue experimenting with various combinations of completion and stimulation parameters to ensure economic viability of developing unconventional reservoirs.Selecting optimal fit⁃for⁃purpose completion and stimulation parameters is a highly critical and field specific task.This paper summarizes the 2014-2020 fracture stimulation trends in 9 major North American unconventional plays:Marcellus,Haynesville,Barnett,Utica,Bone Spring,Bakken,Wolfcamp Midland,Eagle Ford,Scoop/Stack.The overall evolvement and trends of several key completion and stimulation parameters have been analyzed for each play.In addition,the influence of individual completion and stimulation parameters,such as stimulated lateral length,proppant intensity,stage spacing etc.,on well productivity has been evaluated.The initial post frac well productivity(average 90⁃day initial production rate)was analyzed to evaluate the impact of each completion parameter on well performance and determine the optimal range for each completion parameter leading to best well performance.

关 键 词：水力压裂 多级完井 增产趋势 井产能 水平段长度 支撑剂强度 用液强度 段间距 井间距 非常规油气 北美 

分 类 号：TE2[石油与天然气工程—油气井工程] TE3