基于煤系渗透率各向异性测试的水平井穿层压裂效果模拟

被引：35

作者：

李丹琼 ^{[1
]}

张士诚 ^{[2
]}

张遂安 ^{[2
]}

杨立源 ^{[3
]}

肖凤朝 ^{[4
]}

机构：

[1] 中联煤层气有限责任公司

[2] 中国石油大学教育部石油工程重点实验室

[3] 中国石油集团长城钻探工程有限公司

[4] 中国矿业大学地球科学与测绘工程学院

来源：

石油学报 | 2015年 / 36卷 / 08期

关键词：

煤层气; 穿层压裂; 真三轴; 渗透率; 各向异性; 裂缝扩展;

D O I：

暂无

中图分类号：

TE357.1 [];

学科分类号：

摘要：

应用自主研发的真三轴渗透仪,开展了煤样及顶、底板岩样的三轴渗透率测定。基于实验结果,通过有限元三维数值模拟方法,研究了渗透率各向异性对深部煤层顶板水平井穿层压裂裂缝扩展的影响。模拟结果表明:1真三轴渗透仪可以实现三轴差异化应力加载,突破了常规拟三轴渗透仪无法分别加载水平最大主应力和水平最小主应力的瓶颈,可以使实验条件与地层条件更为接近。2高阶无烟煤与顶板粉砂岩的真三轴渗透率测试结果都呈现出明显的各向异性特征。无论是高阶无烟煤,还是顶板粉砂岩,垂直层理方向的渗透率都小于平行层理方向者。对于无烟煤,平行层理方向的渗透率也存在明显差别,垂直端割理方向的渗透率大于垂直面割理方向渗透率值。3考虑渗透率各向异性模型与均质模型相比,压裂模拟过程中,破裂压力和施工压力增高,孔隙压力叠加程度增大;模拟最终时刻的整体裂缝形态更加短宽,且缝高增大。

引用

页码：988 / 994

页数：7

共 20 条

[1]

Monitoring and evaluating the volume fracturing effect of horizontal well.[J].H. Wang;X. Liao;H. Ding.Journal of Natural Gas Science and Engineering.2015,

[2]

Determination of in situ stresses and elastic parameters from hydraulic fracturing tests by geomechanics modeling and soft computing.[J].Shike Zhang;Shunde Yin.Journal of Petroleum Science and Engineering.2014,

[3]

Numerical simulation of hydraulic fracturing coalbed methane reservoir.[J].Jingchen Zhang.Fuel.2014,

[4]

Optimization of hydraulically fractured well configuration in anisotropic coal-bed methane reservoirs.[J].Bingxiang Xu;Xiangfang Li;Manouchehr Haghighi;Weina Ren;Xiyao Du;Dong Chen;Yuyang Zhai.Fuel.2013,

[5]

Three-dimensional finite element simulation and parametric study for horizontal well hydraulic fracture.[J].G.M. Zhang;H. Liu;J. Zhang;H.A. Wu;X.X. Wang.Journal of Petroleum Science and Engineering.2010, 3

[6]

In-situ stress; pore pressure and stress-dependent permeability in the Southern Qinshui Basin.[J].Zhaoping Meng;Jincai Zhang;Rui Wang.International Journal of Rock Mechanics and Mining Sciences.2010, 1

[7]

Fracture/cleat analysis of coals from Zonguldak Basin (northwestern Turkey) relative to the potential of coalbed methane production [J].

Karacan, CÖ ;

Okandan, E .

INTERNATIONAL JOURNAL OF COAL GEOLOGY, 2000, 44 (02) :109-125

[8]

Stratigraphy and structure of coalbed methane reservoirs in the United States: An overview.[J].Jack C Pashin.International Journal of Coal Geology.1998, 1

[9]

Characteristics and origins of coal cleat: A review.[J].S.E Laubach;R.A Marrett;J.E Olson;A.R Scott.International Journal of Coal Geology.1998, 1

[10]

THE EFFECTS OF MECHANICAL-PROPERTIES AND SELECTION OF COMPLETION INTERVAL UPON THE CREATED AND PROPPED FRACTURE DIMENSIONS IN LAYERED RESERVOIRS [J].

RAHIM, Z ;

HOLDITCH, SA .

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 1995, 13 (01) :29-45

← 1 2 →