火成岩研磨性试验研究

邹德永, 王高明, 邢晨

邹德永, 王高明, 邢晨. 火成岩研磨性试验研究[J]. 石油钻探技术, 2020, 48(3): 41-46. DOI: 10.11911/syztjs.2020047
引用本文: 邹德永, 王高明, 邢晨. 火成岩研磨性试验研究[J]. 石油钻探技术, 2020, 48(3): 41-46. DOI: 10.11911/syztjs.2020047
ZOU Deyong, WANG Gaoming, XING Chen. Experimental Study on Igneous Rock Abrasiveness[J]. Petroleum Drilling Techniques, 2020, 48(3): 41-46. DOI: 10.11911/syztjs.2020047
Citation: ZOU Deyong, WANG Gaoming, XING Chen. Experimental Study on Igneous Rock Abrasiveness[J]. Petroleum Drilling Techniques, 2020, 48(3): 41-46. DOI: 10.11911/syztjs.2020047

火成岩研磨性试验研究

基金项目: 国家科技重大专项"岩石研磨性评价及钻头磨损方程研究"(编号:2016ZX05033-004-005)资助
详细信息
    作者简介:

    邹德永(1962—),男,山东威海人,1984年毕业于华东石油学院钻井工程专业,1989年获石油大学(北京)油气井工程专业硕士学位,2004年获石油大学(华东)油气井工程专业博士学位,教授,博士生导师,主要从事油气井工程方面的教学和研究工作。E-mail:zouyan@upc.edu.cn

  • 中图分类号: TE21

Experimental Study on Igneous Rock Abrasiveness

  • 摘要:

    火成岩钻井设计优化的关键是了解火成岩的可钻性和研磨性,但至今还未形成一套测试火成岩研磨性的有效方法。为此,采用自主研发的岩石研磨性测定装置,测试了不同岩性火成岩岩样的研磨性,并分析了火成岩研磨性与其单轴抗压强度和矿物成分含量之间的关系。测试结果表明,在岩样转速8 r/min、钻压800 N、钻头转速198 r/min的条件下,以破碎单位体积岩石研磨标准件的磨损质量作为研磨性指标,可以很好地分辨不同岩性火成岩的研磨性,且火成岩的研磨性与其单轴抗压强度和等效石英含量均呈较好的幂函数关系。研究结果表明,以火成岩单轴抗压强度为基础建立的火成岩研磨性预测模型,可以很好地预测火成岩的研磨性,可为优化火成岩钻井设计提供理论依据。

    Abstract:

    Igneous oil and gas reservoirs are hot spots in well drilling. But, drilling them is extremely difficult due to the highly abrasive nature of the rocks. So, drillability and abrasiveness of igneous rocks must form the basis of drilling optimizition design. The problem is, however, that igneous rock abrasiveness testing methods have not yet been formulated. So, in this paper, we describe the development of a rock abrasiveness measuring device used to test the abrasiveness of igneous rock samples with different lithologies. We also examined the relationship between the abrasiveness and their uniaxial compressive strength of igneous rocks, and mineral content. We found that under the conditions of rock sample rotary speed of 8 r/min, WOB of 800 N, and drill bit rotary speed of 198 r/min, the weight loss of grinding standard part of per unit volume broken rock within a certain time can be used as abrasiveness index to distinguish the abrasiveness of igneous rocks with different lithologies. The abrasiveness of igneous rocks shows a good power function relationship between uniaxial compressive strength and equivalent quartz content. The research results show that the abrasiveness prediction model based on the uniaxial compressive strength of igneous rock can predict the igneous rock abrasiveness very well and provide a theoretical basis for optimizing the drilling design for wells in igneous reservoirs.

  • 图  1   岩石研磨性试验装置

    Figure  1.   Rock abrasiveness test device

    图  2   岩石研磨性试验示意

    Figure  2.   Schematic diagram of rock abrasiveness test

    图  3   不同钻压下斜长花岗岩岩样和标准件磨损量与钻头钻速的关系

    Figure  3.   Relationship between the abrasion losses of oblique granite sample and standard part and the drilling speed of drill bit under different WOB

    图  5   不同岩性岩样和标准件磨损量与钻压的关系(转速198 r/min)

    Figure  5.   Relationship between abrasion losses and WOB of rock samples with different lithology and standard parts (rotary speed of 198 r/min)

    图  4   不同钻压下玄武岩岩样和标准件磨损量与钻头转速的关系

    Figure  4.   Relationship between the abrasion losses of basalt sample and standard part and the rotary speed of drill bit under different WOB

    图  6   火成岩研磨性指标与其单轴抗压强度的关系

    Figure  6.   Relationship between abrasiveness and uniaxial compressive strength of igneous rock

    图  7   火成岩研磨性指标与等效石英含量的关系

    Figure  7.   Relationship between abrasiveness and equivalent quartz content of igneous rock

    表  1   火成岩岩样矿物成分及含量和单轴抗压强度测试结果

    Table  1   Test results of mineral composition & content and uniaxial compressive strength of igneous rock samples

    岩性 矿物各成分含量,%qe,%σ/MPa
    石英钾长石斜长石闪石辉石
    斜长花岗岩12255984.00112
    花岗斑岩17502984.71129
    石英正长岩19512785.86147
    石英二长岩18384186.00138
    花岗二长岩24363786.57176
    英安岩36  9401188.21207
    花岗正长岩31442085.86230
    角闪辉长岩182236101389.27268
    花岗闪长岩35  954  390.13275
    玄武岩1755  519308
    下载: 导出CSV

    表  2   火成岩研磨性指标与单轴抗压强度关系回归结果

    Table  2   Regression results of relationship between compressive strength and abrasiveness of igneous rocks

    函数关系模型R2F
    线性ω=0.144σ–6.0280.944 3135.504 1
    对数ω=27.244lnσ–120.170.901 4 70.133 6
    指数ω=5.78e0.006 4σ0.961 4199.476 8
    ω=0.031σ1.2410.963 1208.851 6
    多项式ω=0.000 4σ2–0.025 5σ+9.7120.962 991.030 9
    下载: 导出CSV

    表  3   火成岩研磨性指标与等效石英含量关系回归结果

    Table  3   Regression results of relationship between equivalent quartz content and abrasiveness of igneous rocks

    函数关系模型R2F
    线性ω=3.680qe–298.740.830 434.262 3
    对数ω=320.26lnqe–1 408.70.828 533.813 3
    指数ω=4×10–6e0.187qe0.832 734.845 0
    ω=2×10–29qe15.50.834 335.234 0
    多项式ω=0.02qe2–138.6170.832 134.690 8
    下载: 导出CSV

    表  4   回归关系式比较

    Table  4   Comparison of regression relations

    引入参数关系式R2F
    σ式(3)0.963 1208.851 6
    qe式(4)0.834 3 35.234 0
    qeσ式(6)0.962 7 77.357 9
    下载: 导出CSV

    表  5   研磨性指标预测结果

    Table  5   Abrasiveness prediction results of igneous rocks with different lithologies

    岩性单轴抗压
    强度/MPa
    研磨性指标/(mg∙cm–3相对误差,%
    预测实测
    正长花岗岩15115.6315.242.52
    斜长花岗岩11811.5111.953.80
    粉红花岗岩27332.6030.067.80
    二长花岗岩19721.7523.176.55
    二长花岗岩16917.9817.452.94
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-10-30
  • 修回日期:  2020-03-30
  • 网络出版日期:  2020-04-09
  • 刊出日期:  2020-04-30

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