Rapid Evaluation of Shale Reservoirs Based on Pre-Frac Injection/Falloff Diagnostic Test
-
摘要: 页岩气储层渗透率非常低，采用常规压力恢复测试方法评价储层时需要很长时间才能探测到径向流动，导致效率非常低，而微注入压降测试方法可以使页岩气储层在较短时间内出现拟径向流，从而实现储层的快速评价。在分析微注入压降测试方法快速评价页岩气储层原理的基础上，针对涪陵页岩气储层特点，从设备选择、注入排量、总注入量和注入液体选择等方面对微注入压降测试施工参数进行了优化设计。研究结果发现，涪陵页岩气田可以采用150~500 L/min排量注入清水进行微注入压降测试，待地层破裂后再持续泵注10~30 min，注入总量控制在5~15 m3，就可以获得较好的测试结果。采用微注入压降测试方法对涪陵页岩气田6口页岩气井储层进行了评价，通过对压降测试曲线进行G函数分析获得了原始地层压力和储层有效渗透率，其与试验分析和压力测试结果相吻合。这表明，采用微注入压降测试方法可以实现对页岩储层的快速评价。Abstract: Shale gas reservoirs are characterized by extremely low permeability.Conventional build-up tests used for reservoir assessments have extremely low efficiencies due to the prolonged time required for detection of radial flows.On the other hand,pre-frac injection/falloff diagnostic test(also known as Diagnostic Fracture Injection Test,DFIT)can detect pseudo-radial flow in a short time,and consequently may quickly assess reservoir conditions.Based on that,design optimization was performed for shale gas reservoirs in the Fuling Area with consideration to equipment selection,injection flow rates,overall injection volume and properties of injection fluids.Research results showed that satisfactory test results could be obtained by using a flow-rate of 150-500L/min and by bumping for 10-30 min after formation fractured.The total volume of injection fluids should be maintained at 5-15 m3.DFIT had been conducted in 6 wells to assess the properties of shale gas reservoirs. Through G-function and ACA analysis using the acquired data,original formation pressures and effective reservoir permeability were determined and it was discovered that relevant results coincided well with formation test results. It had been verified that the DFIT could be used for rapid assessment of shale reservoirs.
-
Keywords:
- shale gas /
- DFIT /
- well test data interpretation /
- reservoir evaluation /
- G-function /
- Fuling Shale Gas Field
-
-
[1] 薛承瑾.页岩气压裂技术现状及发展建议[J].石油钻探技术,2011,39(3):24-29. XUE Chengjin.Technical advance and development proposals of shale gas fracturing[J].Petroleum Drilling Techniques,2011,39(3):24-29. [2] 王林,平恩顺,张建华,等.可降解桥塞研制及其承压性能试验[J].石油机械,2017,45(2):64-67. WANG Lin,PING Enshun,ZHANG Jianhua,et al.Development and pressure bearing performance experiment of the degradable bridge plug[J].China Petroleum Machinery,2017,45(2):64-67. [3] 汪友平,王益维,孟祥龙,等.流体加热方式原位开采油页岩新思路[J].石油钻采工艺,2014,36(4):71-74. WANG Youping,WANG Yiwei,MENG Xianglong,et al.A new idea for in-situ retorting oil shale by way of fluid heating technology[J].Oil Drilling Production Technology,2014,36(4):71-74. [4] 魏辽,秦金立,朱玉杰,等.套管水平井全通径分段压裂工具新进展[J].断块油气田,2016,23(2):248-251. WEI Liao,QIN Jinli,ZHU Yujie,et al.New development of full-bore and unlimited multistage fracturing tools for cased hole horizontal well[J].Fault-Block Oil Gas Field,2016,23(2):248-251. [5] 秦钰铭.大牛地气田盒1储层长水平段压裂工艺技术研究与应用[J].断块油气田,2015,22(5):673-676. QIN Yuming.Long horizontal well fracturing technology and application for He 1 Layer,Daniudi Gas Field[J].Fault-Block Oil Gas Field,2015,22(5):673-676. [6] 黄进,吴雷泽,游园,等.涪陵页岩气水平井工程甜点评价与应用[J].石油钻探技术,2016,44(3):16-20. HUANG Jin,WU Leize,YOU Yuan,et al.The evaluation and application of engineering sweet spots in a horizontal well in the Fuling Shale Gas Reservoir[J].Petroleum Drilling Techniques,2016,44(3):16-20. [7] 秦金立,陈作,杨同玉,等.鄂尔多斯盆地水平井多级滑套分段压裂技术[J].石油钻探技术,2015,43(1):7-12. QIN Jinli,CHEN Zuo,YANG Tongyu,et al.Technology of staged fracturing with multi-stage sleeves for horizontal wells in the Ordos Basin[J].Petroleum Drilling Techniques,2015,43(1):7-12. [8] BARREE R D,MISKIMINS J,GILBERT J.Diagnostic fracture injection tests:common mistakes,misfires,and misdiagnoses[R].SPE 169539,2014.
[9] NOLTE K G.Determination of fracture parameters from fracturing pressure decline[R].SPE 8341,1979.
[10] SOLIMAN M Y,KABIR C S.Testing unconventional formations[J].Journal of Petroleum Science and Engineering,2012,92/93:102-109.
[11] PADMAKAR A S.Geomechanics coupled reservoir flow simulation for diagnostic fracture injection test design and interpretation in shale reservoirs[R].SPE 166201,2013.
[12] WALLACE J,KABIR C S,CIPOLLA C.Multiphysics investigation of diagnostic fracture injection tests in unconventional reservoirs[R].SPE 168620,2014.
[13] 王海涛.页岩气探井测试压裂方案设计与评价[J].石油钻探技术,2012,40(1):12-16. WANG Haitao.Design and evaluation ofmini-frac scheme in shale gas exploration well[J].Petroleum Drilling Techniques,2012,40(1):12-16. [14] 曾博,王莉,张晓伟.小型压裂测试分析方法在页岩气开发中的应用[J].科学技术与工程,2014,14(8):151-155. ZENG Bo,WANG Li,ZHANG Xiaowei.Application of mini-frac analysis in the development of shale plays[J].Science Technology and Engineering,2014,14(8):151-155. [15] 薛承瑾,秦钰铭.涪陵页岩气压裂试气工程技术实践与认识[C]//第六届全国天然气藏高效开发技术研讨会.北京,9月14-16日,2015. XUE Chengjin,QIN Yuming.Understanding and practice of fracturing and testing technology on Fuling shale gas reservoir[C]//The 6th National Symposium on Highly-Efficient Development of Gas Reservoir.Beijing,September 14-16,2015. [16] BARREE R D,MUKHERJEE H.Determination of pressure dependent leakoff and its effect on fracture geometry[R].SPE 36424,1996.
[17] MEYER B R,HAGEL M W.Simulated mini-frac analysis[J].Journal of Canadian Petroleum Technology,1989,28(5):63-73.
[18] BARREE R D,BARREE V L,CRAIG D P.Holistic fracture diagnostics:consistent interpretation of prefrac injection tests using multiple analysis methods[R].SPE 107877,2009.
-
期刊类型引用(12)
1. 罗建新，赵茂林，张烈辉，刘继柱，范梓煊. 基于产量损失率的气井合理配产方法研究. 西南石油大学学报(自然科学版). 2024(01): 89-96 . 
百度学术
2. 徐凤银，聂志宏，孙伟，熊先钺，徐博瑞，张雷，时小松，刘莹，刘世瑞，赵增平，王渊，黄红星，林海鲲. 鄂尔多斯盆地东缘深部煤层气高效开发理论技术体系. 煤炭学报. 2024(01): 528-544 . 百度学术
3. 沈金才. 页岩气井邻井压裂干扰响应特征及机理探讨：以涪陵页岩气田为例. 地质科技通报. 2024(04): 87-97 . 百度学术
4. 汤亚顽. 页岩气开发调整区生产特征及产能影响因素. 江汉石油职工大学学报. 2023(03): 8-10+16 . 百度学术
5. 漆世伟，翟中波，王波，杨卫刚. 基于多参数测量柱塞的井底流压连续监测及应用. 中外能源. 2023(10): 62-66 . 百度学术
6. 房大志，马伟竣，谷红陶，卢比，胡春锋. 南川区块平桥地区页岩气井生产阶段划分与合理生产方式研究. 油气藏评价与开发. 2022(03): 477-486 . 百度学术
7. 蔡勋育，赵培荣，高波，朱彤，田玲珏，孙川翔. 中国石化页岩气“十三五”发展成果与展望. 石油与天然气地质. 2021(01): 16-27 . 百度学术
8. 沈金才，董长新，常振. 涪陵页岩气田气井生产阶段划分及动态特征描述. 天然气勘探与开发. 2021(01): 111-117 . 百度学术
9. 周玉萍，杨文新，郑爱维，梁榜. 页岩气衰竭开采规律影响因素室内模拟. 天然气勘探与开发. 2021(04): 115-122 . 百度学术
10. 陈筱琳. 页岩气完井管柱下入时机分析. 江汉石油职工大学学报. 2020(03): 21-23 . 百度学术
11. 崔传智，尹帆，李立峰，冯绪波. 水驱油藏产量递减评价方法. 断块油气田. 2019(05): 605-608 . 百度学术
12. 邓佳琪. 一种确定页岩气井合理配产的方法. 江汉石油职工大学学报. 2018(05): 48-51 . 百度学术
其他类型引用(3)
计量
- 文章访问数: 6013
- HTML全文浏览量: 116
- PDF下载量: 5361
- 被引次数: 15
下载:
