19_SPE-154947 Fracture Assisted Sandstone Acidizing,
上传者:施军|上传时间:2015-05-08|密次下载
19_SPE-154947 Fracture Assisted Sandstone Acidizing,
内容需要下载文档才能查看
SPE 154947
Fracture Assisted Sandstone Acidizing, Alternative Approach To Increase Production in Tight Sandstone Reservoir
Haris Gunawan, Hermawan Susanto, Barkah Widyantoro (Pertamina Hulu Energi ONWJ); Jose Noguera (Halliburton)
Copyright 2012, Society of Petroleum Engineers
This paper was prepared for presentation at the SPE Oil and Gas India Conference and Exhibition held in Mumbai, India, 28–30 March 2012.
This paper was selected for presentation by an SPE program committee following review of information contained in an abstract submitted by the author(s). Contents of the paper have not been reviewed by the Society of Petroleum Engineers and are subject to correction by the author(s). The material does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Electronic reproduction, distribution, or storage of any part of this paper without the written consent of the Society of Petroleum Engineers is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of SPE copyright.
Abstract
The proven and most suitable stimulation technology to increase production in a tight sandstone formation is hydraulic fracturing. The hydraulic fracturing treatment will create a fracture and then keep it open by proppant, hence a conductive path allowing more oil and gas to be produced. Hydraulic fracturing operations in an offshore environment are sometimes considered as a costly solution and non-economic. An alternative economic solution, Fracture Assisted Sandstone Acidizing (FASSA), was evaluated. Sandstone acidizing is a method to increase oil production, by injection of compatible acid system at matrix rate, below the formation fracture gradient. This stimulation method is most suitable to remove near wellbore damage in medium-high formation permeability. To improve the effectiveness of the acid treatment in tight sandstone reservoir, a hydraulic fracture was created prior to the sandstone acidizing. Besides removing the near wellbore damage, the acid is expected to react with fracture face in sandstone and create a conductive path for oil to flow. Four successful jobs have been performed to date. This paper will describe planning, process, acid treatment selection, operation summary, and evaluation of success or failure of the treatment. In the future we also propose to perform similar treatments for a tight reservoir without having to pull out the existing completion.
Introduction
Generally development of low to medium permeability reservoir is using hydraulic fracturing. However in case of well already completed and work over cost is high, then an alternative approach has to be made. This alternative approach was tested using 4 sample wells from 3 different reservoirs type. Reservoirs are sand-stone reservoir with tight and shaly sand reservoir characteristic.
First reservoir has permeability range from 20-55 mD with porosity 25-28%. In this case we tested FASSA in two wells located in nearby reservoir. Second reservoir has 60 mD permeability and 24-30% porosity. Third reservoir has permeability 1 - 13.4 mD and porosity 19-26%. All data is taken from side wall core sample.
First reservoir consists of 2 wells. Both well prior treatment productions are 23 BFPD with 0% water cut and 3 BFPD and 85% water cut. Second reservoir prior treatment had no flow. Third reservoir prior treatment also had no flow.
Background
Sample wells are completed as single selective completion with treated reservoir on below end of tubing. Reservoir pressure is about 600-700 psi, depth of reservoir 2,800-3,300 ft-TVD. All wells uses gas lift as artificial lift method.
Fracture Assisted SandStone Acidizing (FASSA) being chosen considering two things:
1. Well already inplace, work over cost is high
2. Regular sand stone acid was not effective as it proves in offset well
The idea is to create a fracture and keep small portion of it open by washing sand stone using HF acid. The advantage of using this technique is by-pass any near wellbore damage may occured due to drilling fluid and enhances well production by creating channel after fracture closing.
2 SPE 154947 Prior job conducted, X-Ray Diffraction (XRD) data was required to find best compatible acid composition. Table 1 show
second reservoir XRD data.
内容需要下载文档才能查看
Table 1 - XRD data
Also needed to consider by creating fracture in the reservoir was water oil contact. First reservoir zone has low resistivity
characteristic as shown in the log on first and second figure.
内容需要下载文档才能查看
Fig 1 – Log Well #1
Perforation interval for well #1 is 25 ft (5287’ – 5312’ MD). While for well#2 is 48 ft (5620’ – 5668’ MD).
内容需要下载文档才能查看
Fig 2 – Log Well#2
It’s not so clear where oil water contact since cut off used to determine water is 1 ohm. However based on petrophysic
judgement there is no oil water contact in both reservoirs.
On second reservoir, well#3, oil water contact is not shown. Perforation interval for this well is 30 ft (5,000’ – 5,030’ MD)
内容需要下载文档才能查看
Fig 3 – Log well#3
On third reservoir, well #4, oil water contact not seen. Perforation interval for this well is 12 ft (4352’-4364’ MD).
内容需要下载文档才能查看
Fig 4 – Log well#4
Operation Summary
Well #1 & Well #2
Well #1 and well #2 were newly side tracked well with oil production way below the approved AFE target. Evaluation done
on this well indicated that stimulation was required to produce more oil. Fracturing was preferred but because no more work
over was scheduled on this well, a fracture assisted sandstone acidizing was done. Core sample analysis of the target zone
SPE 154947 3 indicated the need of organic acid; hence the main acid was designed to be Acetic-HF acid. Sufficient amount of 5% HCl to flush the carbonate content not to contact main HF acid and non acid 5% NH4Cl preflush to stabilize the clay materials were pumped before the main acid treatment that over-flushed with 5% HCl.
Well #3
Well #3 was a newly sidetracked well. This well was not producing any fluid. The target zone was indentified as a thight sandstone reservoir with carbonate content of 16.2% and 4% of Kaolinite. This mineral content directs acid selection criteria. Preflushes were consisted of non acid 5% NH4Cl and 15% HCl acid to dissolve the carbonate content. Main acid consisted of 13.5% HCl – 1.5% HF and 15% HCl – 1% HF. The treatment over-flushed with 15% HCl acid.
Well #4
Well #4 was treated using 6.5% HCl – 1.5% HF in main treatment, preflush and overflushed using 5% HCl.
Operation Squence
The stimulation operations were performed on a jack up well services barge using coiled tubing as medium to divert acid across the reservoirs, prior to the main acid treatment, formation were bullheaded using a slick HEC-10 gel to maximum pressure of 80% rating of X-tree. Detail of the operation was as follow:
? Tubing integrity test
? Step rate test to determine the fracture extension rate and fracture extension pressure.
? Breakdown using slick gel to maximum pressure of 80% rating of x-tree.
? Main acid treatment using coiled tubing and fluidic ossication tool to divert the acid across reservoirs.
Result
As result of FASSA treatment all well was back online with good result. In overall well production was increase from 26 BOPD to 654 BOPD with associated gas. Well no#4 shows the lowest result, suspected due to permeability for this zone is low, only 1 – 13.4 mD. Below table shows pre vs post job.
内容需要下载文档才能查看
FASSA treatment not applied yet to reservoir permeability higher than 100 mD. Due to precipitation along time as seen in well#3 after one year, re-treatment is needed. However in well #1 and #2 no significant decline found yet.
Conclusion
1. Fracture Assisted Sand Stone Aciding (FASSA) is suitable for permeability reservoir range from 20-60 mD so far.
2. FASSA technique improve well productivity by bypassing near wellbore damage and micro fracture created
3. Low cost treatment due to no need to pull out tubing string
4. XRD test require to find suitable Sand Stone Acid composition
5. For well with permeability < 10, FASSA treatment not so effective
6. Re-treatment possible after a year or more production
下载文档
热门试卷
- 2016年四川省内江市中考化学试卷
- 广西钦州市高新区2017届高三11月月考政治试卷
- 浙江省湖州市2016-2017学年高一上学期期中考试政治试卷
- 浙江省湖州市2016-2017学年高二上学期期中考试政治试卷
- 辽宁省铁岭市协作体2017届高三上学期第三次联考政治试卷
- 广西钦州市钦州港区2016-2017学年高二11月月考政治试卷
- 广西钦州市钦州港区2017届高三11月月考政治试卷
- 广西钦州市钦州港区2016-2017学年高一11月月考政治试卷
- 广西钦州市高新区2016-2017学年高二11月月考政治试卷
- 广西钦州市高新区2016-2017学年高一11月月考政治试卷
- 山东省滨州市三校2017届第一学期阶段测试初三英语试题
- 四川省成都七中2017届高三一诊模拟考试文科综合试卷
- 2017届普通高等学校招生全国统一考试模拟试题(附答案)
- 重庆市永川中学高2017级上期12月月考语文试题
- 江西宜春三中2017届高三第一学期第二次月考文科综合试题
- 内蒙古赤峰二中2017届高三上学期第三次月考英语试题
- 2017年六年级(上)数学期末考试卷
- 2017人教版小学英语三年级上期末笔试题
- 江苏省常州西藏民族中学2016-2017学年九年级思想品德第一学期第二次阶段测试试卷
- 重庆市九龙坡区七校2016-2017学年上期八年级素质测查(二)语文学科试题卷
- 江苏省无锡市钱桥中学2016年12月八年级语文阶段性测试卷
- 江苏省无锡市钱桥中学2016-2017学年七年级英语12月阶段检测试卷
- 山东省邹城市第八中学2016-2017学年八年级12月物理第4章试题(无答案)
- 【人教版】河北省2015-2016学年度九年级上期末语文试题卷(附答案)
- 四川省简阳市阳安中学2016年12月高二月考英语试卷
- 四川省成都龙泉中学高三上学期2016年12月月考试题文科综合能力测试
- 安徽省滁州中学2016—2017学年度第一学期12月月考高三英语试卷
- 山东省武城县第二中学2016.12高一年级上学期第二次月考历史试题(必修一第四、五单元)
- 福建省四地六校联考2016-2017学年上学期第三次月考高三化学试卷
- 甘肃省武威第二十三中学2016—2017学年度八年级第一学期12月月考生物试卷
网友关注
- 高温高压处理对高直链玉米淀粉成膜性的研究
- The draft genome, transcriptome, and microbiome of Dermatophagoides farinae reveal a broad spectrum
- 文献
- 粗纤维(秸秆)饲料发酵菌种
- 科尔沁沙地两种蒿属固沙半灌木的开花物候比较研究_郑星星
- 2015年集中秧田地管理措施
- Determination of Physiological Races
- 高温香菇品种931与康氏木霉的拮抗试验简报
- 木本药用植物红豆杉研究的新进展
- 那务镇蚕桑生产简介
- 县域经济视阈下乡村生态旅游项目开发探讨
- 扎市经济新增长点
- 黑龙江产区
- 辣木的栽培技术
- 西洋参叶20s_原人参二醇组皂苷对鼠实验性心肌缺血的保护作用_安钢力
- 高温高湿多雨地区葡萄园土壤管理存在问题与对策
- 不同基质对狭叶四照花苗期生长的影响_易咏梅
- 峨眉四照花茎尖组织培养技术_路承香
- 现代农业对我国新农村建设的意义及其发展对策
- 酸性氧化电位水对生鲜食品消毒的试验观察
- 西部地区生态农业产业化的优劣势分析
- 高温高湿谨防水稻纹枯病的发生
- LY-T 1275-1999 森林土壤水化学分析
- 健身之道(续)九
- 高温闷棚克服设施蔬菜连作障碍
- 南湖生态公园带给唐山新的生机
- 中药炮制学打印版小五号字体16面双面打印8页
- 西洋参冠瘿组织悬浮培养及其人参皂苷类成分的分离_英文_于荣敏
- 福建省园林绿化企业787家
- N、P、K肥计算方法
网友关注视频
- 每天日常投篮练习第一天森哥打卡上脚 Nike PG 2 如何调整运球跳投手感?
- 外研版八年级英语下学期 Module3
- 冀教版英语三年级下册第二课
- 沪教版牛津小学英语(深圳用) 四年级下册 Unit 12
- 沪教版牛津小学英语(深圳用) 五年级下册 Unit 12
- 沪教版八年级下册数学练习册一次函数复习题B组(P11)
- 外研版英语三起5年级下册(14版)Module3 Unit1
- 【部编】人教版语文七年级下册《过松源晨炊漆公店(其五)》优质课教学视频+PPT课件+教案,江苏省
- 《小学数学二年级下册》第二单元测试题讲解
- 沪教版牛津小学英语(深圳用) 四年级下册 Unit 8
- 冀教版小学数学二年级下册第二周第2课时《我们的测量》宝丰街小学庞志荣.mp4
- 六年级英语下册上海牛津版教材讲解 U1单词
- 外研版英语七年级下册module3 unit2第二课时
- 苏科版数学七年级下册7.2《探索平行线的性质》
- 苏科版数学 八年级下册 第八章第二节 可能性的大小
- 【获奖】科粤版初三九年级化学下册第七章7.3浓稀的表示
- 沪教版牛津小学英语(深圳用) 四年级下册 Unit 2
- 二年级下册数学第二课
- 沪教版牛津小学英语(深圳用) 四年级下册 Unit 7
- 外研版英语七年级下册module3 unit2第一课时
- 冀教版小学数学二年级下册第二单元《余数和除数的关系》
- 【部编】人教版语文七年级下册《泊秦淮》优质课教学视频+PPT课件+教案,天津市
- 外研版英语七年级下册module3 unit1第二课时
- 沪教版牛津小学英语(深圳用) 六年级下册 Unit 7
- 【部编】人教版语文七年级下册《泊秦淮》优质课教学视频+PPT课件+教案,湖北省
- 30.3 由不共线三点的坐标确定二次函数_第一课时(市一等奖)(冀教版九年级下册)_T144342
- 冀教版小学数学二年级下册第二周第2课时《我们的测量》宝丰街小学庞志荣
- 沪教版八年级下册数学练习册21.3(3)分式方程P17
- 沪教版牛津小学英语(深圳用) 四年级下册 Unit 4
- 外研版英语三起6年级下册(14版)Module3 Unit1
精品推荐
- 2016-2017学年高一语文人教版必修一+模块学业水平检测试题(含答案)
- 广西钦州市高新区2017届高三11月月考政治试卷
- 浙江省湖州市2016-2017学年高一上学期期中考试政治试卷
- 浙江省湖州市2016-2017学年高二上学期期中考试政治试卷
- 辽宁省铁岭市协作体2017届高三上学期第三次联考政治试卷
- 广西钦州市钦州港区2016-2017学年高二11月月考政治试卷
- 广西钦州市钦州港区2017届高三11月月考政治试卷
- 广西钦州市钦州港区2016-2017学年高一11月月考政治试卷
- 广西钦州市高新区2016-2017学年高二11月月考政治试卷
- 广西钦州市高新区2016-2017学年高一11月月考政治试卷
分类导航
- 互联网
- 电脑基础知识
- 计算机软件及应用
- 计算机硬件及网络
- 计算机应用/办公自动化
- .NET
- 数据结构与算法
- Java
- SEO
- C/C++资料
- linux/Unix相关
- 手机开发
- UML理论/建模
- 并行计算/云计算
- 嵌入式开发
- windows相关
- 软件工程
- 管理信息系统
- 开发文档
- 图形图像
- 网络与通信
- 网络信息安全
- 电子支付
- Labview
- matlab
- 网络资源
- Python
- Delphi/Perl
- 评测
- Flash/Flex
- CSS/Script
- 计算机原理
- PHP资料
- 数据挖掘与模式识别
- Web服务
- 数据库
- Visual Basic
- 电子商务
- 服务器
- 搜索引擎优化
- 存储
- 架构
- 行业软件
- 人工智能
- 计算机辅助设计
- 多媒体
- 软件测试
- 计算机硬件与维护
- 网站策划/UE
- 网页设计/UI
- 网吧管理