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(14)
1. 许冬进，吴坤，印文龙，王勇，郭泽辰，胡君城，魏志军，何飞鹏. 非常规油气微注压降返排分析技术现状及发展趋势. 大庆石油地质与开发. 2025(03): 151-158 . 
百度学术
2. 曹海涛，李南颖. 页岩气多段压裂水平井不等长裂缝定量评价方法研究. 科技通报. 2024(03): 15-18+35 . 百度学术
3. 黄艺. 涪陵页岩气田微注入测试应用研究. 石油地质与工程. 2023(01): 116-120 . 百度学术
4. 王妍妍，王卫红，胡小虎，刘华，蒋晓蓉，戴城，方思冬. 基于脉冲注入理论的页岩储层微破裂试井解释技术及应用. 石油与天然气地质. 2022(01): 241-250 . 百度学术
5. 陈勇. 各向异性表征技术在页岩气储层探测中的应用. 能源与环保. 2022(06): 98-103 . 百度学术
6. 赵勇，李南颖，杨建，程诗胜. 深层页岩气地质工程一体化井距优化——以威荣页岩气田为例. 油气藏评价与开发. 2021(03): 340-347 . 百度学术
7. 仲冠南，肖骁，张庆军，王守志，白景彪，张梦千，喻高明. 基于时间步长线性叠加法的孔隙—弹性介质水力裂缝扩展机理研究. 钻采工艺. 2021(06): 88-92 . 百度学术
8. 白国斌. 威202、204井区页岩气钻井液密度设计优化方法. 钻井液与完井液. 2020(02): 196-201 . 百度学术
9. 张超，郝明慧，杨国通，王小波，刘鑫，周冲. 致密气生产井微型压裂诊断技术. 油气井测试. 2020(04): 51-55 . 百度学术
10. 敬季昀，郭布民，王杏尊，李小刚. 致密储集层小型压裂压降分析方法的改进与应用. 新疆石油地质. 2019(03): 371-375 . 百度学术
11. 刘志强. 水平井直井段压力恢复试井工艺. 石油钻采工艺. 2019(03): 301-306 . 百度学术
12. 周彤，苏建政，李凤霞，刘国庆，廖如刚. 基于停泵压力降落曲线分析的压后裂缝参数反演. 天然气地球科学. 2019(11): 1646-1654 . 百度学术
13. 张健，敬季昀，王杏尊. 利用小型压裂短时间压降数据快速获取储层参数的新方法. 岩性油气藏. 2018(04): 133-139 . 百度学术
14. 任建华. 微注入压降测试在页岩气储层评价中的应用. 科学技术与工程. 2018(30): 65-69 . 百度学术
其他类型引用(4)
计量
- 文章访问数: 6014
- HTML全文浏览量: 116
- PDF下载量: 5361
- 被引次数: 18
下载:
