页岩气储层岩石力学特性及脆性评价

李庆辉; 陈勉; 金衍; 侯冰; 张家振

doi:10.3969/j.issn.1001-0890.2012.04.004

页岩气储层岩石力学特性及脆性评价

doi: 10.3969/j.issn.1001-0890.2012.04.004

李庆辉¹,
陈勉¹,
金衍^1, ,,
侯冰¹,
张家振²

1.
中国石油大学(北京)石油工程学院,北京 102249;
2.
中国石油川庆钻探工程有限公司钻采工程技术研究院,四川成都 618300

基金项目:

国家重点基础研究发展计划("973"计划)项目"深井复杂地层安全高效钻井基础研究"(编号:2010CB226700)、国家科技重大专项"力学与化学耦合井眼稳定技术研究"(编号:2011ZX05031-004-005HZ)和国家自然科学"超低渗透页岩多井多裂缝同步压裂机理研究"(编号:51074171) 部分研究内容。

详细信息

作者简介:
李庆辉(1985—),男,河北赵县人,2008年毕业于中国地质大学(北京)勘查技术与工程专业,获双学士学位,油气井工程专业在读博士研究生,主要从事页岩气钻、完井过程中的岩石力学问题研究。联系方式(010)89732209,liqinghui@sina.cn。

通讯作者:
金衍, cup-jinyan@163.com

中图分类号: TE311
计量
- 文章访问数: 20217
- HTML全文浏览量: 468
- PDF下载量: 3719
- 被引次数: 0
出版历程
- 收稿日期: 2012-03-15
- 修回日期: 2012-06-16
- 刊出日期: 1900-01-01

Rock Mechanical Properties and Brittleness Evaluation of Shale Gas Reservoir

1.
College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing,102249,China;
2.
CCDC Drilling & Production Engineering Technology Research Institute,CNPC,Chengdu,Sichuan,618300,China

摘要

摘要: 页岩气储层的岩石力学特性对开发影响极大,进行页岩破坏机理、力学特性和脆性评价方面的研究,可以为页岩气钻井和压裂设计工作提供技术支撑。采用室内试验和测井分析相结合的方法,在黑色页岩力学特性研究的基础上,分析了其脆性破坏特征及影响因素,提出了一种利用岩石弹性参数和矿物组成综合评价页岩脆性的方法,并介绍了利用测井资料计算单井脆性剖面的流程。研究表明,页岩普遍具有脆性破坏的特征,破坏类型与页岩种类、取心深度、取心方位和加载条件相关,低围压下标准试样以劈裂式破坏为主,全应力应变曲线经历极短的塑性屈服阶段即发生破坏,高围压时多出现双剪式和单剪式破坏,页岩的脆性与试样的弹性参数和矿物组成关系密切。实例分析表明,脆性特征影响压裂效果,与压裂造缝能力和产气情况吻合良好。综合脆性评价既是储层岩石力学特性分析的重要内容,也是压裂选层的重要依据。
- 页岩气 /
- 岩石力学 /
- 破坏模式 /
- 脆性评价 /
- 测井数据 /
- 选择性压裂
Abstract: Rock mechanical properties of shale gas reservoir are vitally important for exploitation.It’s necessary to conduct laboratory study on failure mechanism,mechanical properties and brittleness evaluation of shale,which can provide technical support for drilling and fracturing design.Based on rock mechanical properties of black shale,in combination with laboratory experiments and log analysis,the analysis of brittle failure characteristics and influential factors are performed.Comprehensive brittleness evaluation method utilizing elastic parameters and mineral compositions are proposed.Brittleness calculating process of single well utilizing logging data is introduced.Study results show that shale generally has a brittle fracture characteristic,and failure modes are related to shale type,coring depth,coring direction and loading conditions.Failure mode under low confining pressure is predominantly splitting failure;overall stress-strain curve has a very short plastic yield section before failure.Double shear and single shear failure modes are dominant under high confining pressure.Brittleness of shale samples has a close relationship to elastic parameter and mineral composition.A case study shows that brittleness affects hydraulic fracturing results,and coincides well with width generation capacity and deliverability.Comprehensive brittleness evaluation is useful for understanding reservoir mechanics and selecting fracture section.
- shale gas /
- rock mechanics /
- failure modes /
- brittleness evaluation /
- log data /
- selective fracturing

HTML全文

参考文献(15)

蒋裕强,董大忠,漆麟,等.页岩气储层的基本特征及其评价[J].天然气工业,2010,30(10):7-12. Jiang Yuqiang,Dong Dazhong,Qi Lin,et al.Basic features and evaluation of shale gas reservoirs[J].Natural Gas Industry,2010,30(10):7-12.

付永强,马发明,曾立新,等.页岩气储层压裂实验评价关键技术[J].天然气工业,2011,31(4):51-54. Fu Yongqiang,Ma Faming,Zeng Lixin,et al.Key techniques of experimental evaluation in the fracturing treatment for shale gas reservoirs[J].Natural Gas Industry,2011,31(4):51-54.

李庆辉,陈勉,Fred P W,等.工程因素对页岩气产量的影响:以北美Haynesville页岩气藏为例[J].天然气工业,2012,32(4):54-59. Li Qinghui,Chen Mian,Fred P W,et al.Influences of engineering factors on shale gas productivity:a case study from the Haynesville shale gas reservoir in North America[J].Natural Gas Industry,2012,32(4):54-59.

蒋恕.页岩气开发地质理论创新与钻完井技术进步[J].石油钻探技术,2011,39(3):17-23. Jiang Shu.Geological theory innovations and advances in drilling and completion technology for shale gas development[J].Petroleum Drilling Techniques,2011,39(3):17-23.

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.

蒋廷学,贾长贵,王海涛,等.页岩气网络压裂设计方法研究[J].石油钻探技术,2011,39(3):36-40. Jiang Tingxue,Jia Changgui,Wang Haitao,et al.Study on network fracturing design method in shale gas[J].Petroleum Drilling Techniques,2011,39(3):36-40.

金衍,陈勉,周健,等.岩性突变体对水力裂缝延伸影响的实验研究[J].石油学报,2008,29(2):300-303. Jin Yan,Chen Mian,Zhou Jian,et al.Experimental study on the effects of salutatory barrier on hydraulic fracture propagation of cement blocks[J].Acta Petrolei Sinica,2008,29(2):300-303.

金衍,陈勉,张旭东.利用测井资料预测深部地层岩石断裂韧性[J].岩石力学与工程学报,2001,20(4):454-456. Jin Yan,Chen Mian,Zhang Xudong.Determination of fracture toughness for deep well rock with geophysical logging data[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(4):454-456.

Rickman R,Mullen M,Petre E,et al.A practical use of shale petrophysics for stimulation design optimization:all shale plays are not clones of the Barnett Shale.SPE 115258,2008.

沈建中.宣页1井钻井技术难点及对策[J].石油钻探技术,2011,39(3):41-45. Shen Jianzhong.Drilling technical difficulties and counter measures in Well Xuanye 1[J].Petroleum Drilling Techniques,2011,39(3):41-45.

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 of mini-frac scheme in shale gas exploration well[J].Petroleum Drilling Techniques,2012,40(1):12-16.

孙海成,汤达祯,蒋廷学.页岩气储层裂缝系统影响产量的数值模拟研究[J].石油钻探技术,2011,39(5):63-67. Sun Haicheng,Tang Dazhen,Jiang Tingxue.Numerical simulation of the impact of fracture system on well production in shale formation[J].Petroleum Drilling Techniques,2011,39(5):63-67.

刘红磊,熊炜,高应运,等.方深1井页岩气藏特大型压裂技术[J].石油钻探技术,2011,39(3):46-52. Liu Honglei,Xiong Wei,Gao Yingyun,et al.Large scale fracturing technology of Fangshen 1 shale gas well[J].Petroleum Drilling Techniques,2011,39(3):46-52.

莫里斯·杜索尔特,约翰·麦克力兰,蒋恕.大规模多级水力压裂技术在页岩油气藏开发中的应用[J].石油钻探技术,2011,39(3):63-67. Maurice Dusseault,John McLennan,Jiang Shu.Massive multi-stage hydraulic fracturing for oil and gas recovery from low mobility reservoirs in China[J].Petroleum Drilling Techniques,2011,39(3):63-67.

金衍,陈勉,张旭东.天然裂缝地层斜井水力裂缝起裂压力模型研究[J].石油学报,2006,27(5):124-126. Jin Yan,Chen Mian,Zhang Xudong.Hydraulic fracturing initiation pressure models for directional wells in naturally fractured formation[J].Acta Petrolei Sinica,2006,27(5):124-126.

施引文献

资源附件(0)

访问统计