Error Analysis and Design Considerations for Backpressure Testing of Gas Wells

叠加原理 流量(数学) 机械 流动条件 瞬态(计算机编程) 流量系数 地质学 数学 模拟 计算机科学 物理 数学分析 操作系统
作者
S.B. Hinchman,F.H. Poettmann
标识
DOI:10.2118/15520-ms
摘要

Abstract The theoretical validity of backpressure tests has been analyzed for wells in radial flow and for wells intersected by vertical fractures. It is demonstrated that stabilized flow-after-flow and isochronal tests are valid tests. Unstabilized flow-after-flow and modified isochronal tests result in error in predicted deliverability caused by continued influence of prior flow and shut-in periods (superposition error). It is shown how the superposition error can be minimized by proper selection and design of the backpressure test. Isochronal and modified isochronal tests are unsteady-state methods and provide the transient deliverability of a well. An extended flow period is generally used to determine the stabilized deliverability. In many reservoirs extended flow periods are unreasonably expensive and impractical. Analytical solutions for predicting stabilized deliverability are required. The calculations used in the prediction of stabilized gas deliverability are based on a radial flow geometry. When these calculations are applied to other flow geometries, errorneous conclusions result. In this study a fully-implicit, two-dimensional gas simulator was used to demonstrate the extension of radial flow theory to vertically fractured wells. The effect of fracture length and conductivity was investigated. It was observed that the performance coefficient (Ct) was inversly related to pressure. A proof is presented for the Darcy flow condition. An understanding of how Ct changes with time will allow a more precise estimate of stabilized deliverability.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
慈祥的梦露完成签到,获得积分10
1秒前
轻松峻熙完成签到,获得积分10
2秒前
sudor123456完成签到,获得积分10
4秒前
5秒前
大个应助甜甜友容采纳,获得10
5秒前
黄秋秋完成签到,获得积分10
6秒前
Lucas应助阳光BOY采纳,获得10
9秒前
小周发布了新的文献求助10
10秒前
10秒前
悲伤西米露应助小叙采纳,获得10
10秒前
思源应助烦烦采纳,获得10
11秒前
且听风吟发布了新的文献求助10
12秒前
12秒前
guanze发布了新的文献求助10
15秒前
17秒前
科研通AI2S应助Jane采纳,获得10
19秒前
脑洞疼应助科研通管家采纳,获得10
19秒前
顺顺尼完成签到 ,获得积分10
19秒前
NexusExplorer应助科研通管家采纳,获得10
19秒前
Afaq应助科研通管家采纳,获得10
19秒前
在水一方应助科研通管家采纳,获得10
19秒前
19秒前
19秒前
yuiiuy发布了新的文献求助10
20秒前
竹焚完成签到 ,获得积分10
22秒前
ddddd发布了新的文献求助10
22秒前
23秒前
Christine发布了新的文献求助10
24秒前
情怀应助mini采纳,获得10
27秒前
27秒前
28秒前
壮观的思远完成签到,获得积分10
33秒前
冷傲悟空发布了新的文献求助10
34秒前
35秒前
大猪完成签到 ,获得积分10
36秒前
文艺点点完成签到,获得积分10
36秒前
顾矜应助guanze采纳,获得10
36秒前
充电宝应助结实的凉面采纳,获得10
36秒前
Galaxy发布了新的文献求助10
37秒前
37秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3971655
求助须知:如何正确求助?哪些是违规求助? 3516320
关于积分的说明 11181963
捐赠科研通 3251445
什么是DOI,文献DOI怎么找? 1795889
邀请新用户注册赠送积分活动 876131
科研通“疑难数据库(出版商)”最低求助积分说明 805266