Well Test Interpretation of Vertically Fractured Gas Wells

水位下降(水文) 地质学 石油工程 试井(油气) 流量(数学) 湍流 机械 井筒 磁导率 岩土工程 断裂(地质) 瞬态(计算机编程) 化学 含水层 地下水 物理 操作系统 生物化学 计算机科学
作者
R.A. Wattenbarger,H.J. Ramey
出处
期刊:Journal of Petroleum Technology [Society of Petroleum Engineers]
卷期号:21 (05): 625-632 被引量:84
标识
DOI:10.2118/2155-pa
摘要

In the analysis of field data it is important to bear in mind the proper relationship between the radial flow period and the linear proper relationship between the radial flow period and the linear flow period. The transition between these periods is quite long and can be misinterpreted as being the linear flow period. Another factor that can complicate analysis is turbulence. Introduction The trend in gas well testing has been to rely more on be early-time flow data of drawdown and buildup tests than on stabilized flow tests. The stabilized testing methods often are not adequate for complicated modem gas reservoirs because many of these reservoirs have extremely low permeabilities and the transient flow period of a well test can last for days or weeks. It has become common to augment the flow capacity of gas wells by hydraulically fracturing their producing formations. In deep reservoirs the induced producing formations. In deep reservoirs the induced fractures are generally vertical and tend to follow a single plane of weakness. The presence of a vertical fracture at the wellbore complicates the transient flow behavior of a low permeability gas well. The flow is further complicated when turbulence occurs near the wellbore. Russell and Truitt published transient drawdown solutions for vertically-fractured liquid wells. They developed methods of drawdown and buildup testing utilizing these solutions, which were based on numerical simulation. Clark applied the basic Russell-Truitt solutions to analyze fractured water injection wells by falloff tests. Field examples were given to substantiate the method of analysis. The Russell-Truitt solutions and well testing methods can be extended to gas well flow. Millheim and Cichowicz presented the drawdown equations for ideal gas flow, including the effects of formation damage and turbulence. Two actual field cases were presented, both of which exhibited extensive fractures presented, both of which exhibited extensive fractures and turbulent flow. For the pressure range of these well tests, the use of ideal gas equations was acceptable. These field cases were significant in being the first published data showing the occurrence of turbulence in fractured gas wells. We, also, observed such cases in practice. Our purpose here is to extend the theory of fractured gas well testing to the flow of real gases. To determine the effects of wellbore storage and turbulence on well test interpretation, we developed a finite-difference model to simulate well test conditions. Since gas wells usually are widely spaced and have high compressibility, the emphasis has been put on the early transient behavior before the effects of the outer boundary are noticeable at the wellbore. The Mathematical Model The geometry of our mathematical model is similar to that used by Prats. The well is centered in a circular uniform reservoir. A vertical fracture of infinite flow capacity penetrates the formation and passes through die wellbore. The wellbore itself is passes through die wellbore. The wellbore itself is not important. Fig. 1 shows a sketch of the problem. Fig. 2 shows the idealized model. JPT P. 625
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
刚刚
Qian完成签到,获得积分10
刚刚
onlyan发布了新的文献求助10
1秒前
wjx关闭了wjx文献求助
3秒前
victorchen发布了新的文献求助10
3秒前
3秒前
小景毕业发布了新的文献求助10
4秒前
Yorshka完成签到,获得积分10
5秒前
7秒前
巫马夜安完成签到,获得积分10
8秒前
可爱的函函应助123采纳,获得10
8秒前
8秒前
wjx关闭了wjx文献求助
9秒前
9秒前
Bystander完成签到 ,获得积分10
10秒前
shine发布了新的文献求助10
10秒前
NexusExplorer应助复杂语山采纳,获得10
10秒前
yxy发布了新的文献求助10
10秒前
13秒前
WD发布了新的文献求助10
13秒前
wjx关闭了wjx文献求助
13秒前
留白完成签到 ,获得积分10
13秒前
小景毕业完成签到,获得积分10
14秒前
bkagyin应助lemon采纳,获得10
14秒前
卢哲发布了新的文献求助10
14秒前
华仔应助泡泡糖与一世安采纳,获得30
14秒前
曾经曼梅完成签到,获得积分10
17秒前
科研通AI2S应助Kollia采纳,获得30
17秒前
乐乐应助onlyan采纳,获得10
18秒前
18秒前
wjx关闭了wjx文献求助
18秒前
最短的咒发布了新的文献求助10
19秒前
19秒前
20秒前
池鱼发布了新的文献求助150
22秒前
22秒前
wjx关闭了wjx文献求助
23秒前
23秒前
123发布了新的文献求助10
23秒前
23秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
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 3975458
求助须知:如何正确求助?哪些是违规求助? 3519866
关于积分的说明 11199996
捐赠科研通 3256213
什么是DOI,文献DOI怎么找? 1798133
邀请新用户注册赠送积分活动 877386
科研通“疑难数据库(出版商)”最低求助积分说明 806305