密度对油基钻井液性能的影响

摘要: 随着高密度油基钻井液被使用的越来越多，高密度时油基钻井液表现出的性能不稳定也逐渐被现场工程师发现。研究了密度对油基钻井液性能的影响，以及不同密度下温度、剪切时间、油水比、有机土、CaCl₂浓度和劣质固相对油基钻井液性能的影响。研究结果表明，重晶石能增加油基钻井液的黏度和切力，提高钻井液的乳化稳定性；油基钻井液的破乳电压和重晶石的加入量呈线性关系；在高密度时，油基钻井液的表观黏度受温度、油水比、有机土和劣质固相的影响程度比低密度时大；破乳电压在高密度时受油水比、CaCl₂浓度和有机土的影响比低密度时大。综上可知，密度的增加不仅单独对油基钻井液性能造成影响，还提高了油基钻井液对其它因素的敏感性。因此在使用高密度油基钻井液时，要加强对现场钻井液性能的监控和调节。
- 油基钻井液 /
- 高密度 /
- 温度 /
- 破乳电压 /
- 黏度
Abstract: In field use of high density oil base drilling fluids, it was found that the properties of the oil base drilling fluids become unstable with increase in mud density. Laboratory study shows that addition of barite increases the viscosity and gel strength, and enhances the emulsion stability of oil base drilling fluids. There is a linear relationship between the electric stability potential and the concentration of barite. An oil base drilling fluid, when at higher densities, has an apparent viscosity that is affected by temperature, oil/water ratio, concentrations of organophilic clay and poor quality solids to a larger extent than when it is at lower densities. Also, an oil base drilling fluid, when at higher densities, has an electric stability potential that is affected by oil/water ratio, concentrations of CaCl₂ and organophilic clay to a larger extent than when it is at lower densities. Summarization of laboratory studies shows that increase in the density of an oil base drilling fluid not only affects the properties of the drilling fluid, it also increases the sensibility of the fluid to other factors. Thus, when using high density oil base drilling fluids, the monitoring and adjustment of the properties of the drilling fluids should be strengthened.
- Oil base drilling fluid /
- High density /
- Temperature /
- Electric stability potential /
- Viscosity

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参考文献(16)

[1]	王中华. 国内外油基钻井液研究与应用进展[J]. 断块油气田,2011,18(4):533-537. WANG Zhonghua. Research and application progress of oil-based drilling fluid at home and abroad[J]. Fault- Block Oil & Gas Field, 2011, 18(4):533-537.
[2]	杨雪山, 鄢捷年, 马鹏程, 等. 油基钻井液在高温高压下的密度预测新模型[J]. 钻井液与完井液, 2012, 29(4):5-8. YANG Xueshan, YAN Jienian, MA Pengcheng, et al. New prediction model for oil-based mud density in HTHP conditions[J].Drilling Fluid & Completion Fluid, 2012, 29(4):5-8.
[3]	庄严, 熊汉桥, 丁峰, 等. 油水比对油基钻井液流变性的影响[J]. 科学技术与工程, 2016, 16(12):238-243. ZHUANG Yan, XIONG Hanqiao, DING Feng, et al. Impact of water/oil ratio on the rheological of oil based drilling fluid[J]. Science Technology and Engineering, 2016, 16(12):238-243.
[4]	HUANG X, LYU K, SUN J, et al. Enhancement of thermal stability of drilling fluid using laponite nanoparticles under extreme temperature conditions[J]. Materials Letters, 2019,248:146-149.
[5]	FAKOYA M F, AHMED R M. A generalized model for apparent viscosity of oil-based muds[J]. Journal of Petroleum Science and Engineering,2018,165:777-785.
[6]	ZHAO Shengying, YAN Jienian, SHU Yong, et al. Rheological properties of oil-based drilling fluids at high temperature and high pressure[J]. Journal of Central South University of Technology, 2008, 15(S1):457-461.
[7]	OLTEDAL V M,WERNER B,LUND B,et al. Rheological properties of oil based drilling fluids and base oils[C]//ASME 201534th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers,2015:V010T11A042-V010T11A042.
[8]	杨振周, 刘付臣, 周春, 等. 抗超高温高密度油基钻井液用新型降黏剂的性能[J]. 钻井液与完井液, 2018, 35(2):35-39. YANG Zhenzhou,LIU Fuchen, ZHOU Chun,et al. Study on the performance of new ultra-high temperature high density oil base mud thinners[J]. Drilling Fluid & Completion Fluid, 2018,35(2):35-39.
[9]	陈在君. 高密度无土相油基钻井液研究及在四川页岩气水平井的应用[J]. 钻采工艺, 2015,38(5):70-72. CHEN Zaijun. Development of high density clay-free oilbased drilling fluid and its application in Sichuan shale gas horizontal well[J]. Drilling & Production Technology, 2015,38(5):70-72.
[10]	FERNANDES R R, ANDRADE D E V, FRANCO A T, et al. Influence of pre-shearing on rheometric measurements of an oil-based drilling fluid[J]. Rheologica Acta, 2017, 56(9):743-752.
[11]	蒋官澄, 黄凯, 李新亮, 等. 抗高温高密度无土相柴油基钻井液室内研究[J]. 石油钻探技术, 2016, 44(6):24-29. JIANG Guancheng, HUANG Kai, LI Xinliang, et al. Research on high temperature resistance and high-density clay-free diesel oil-based drilling fluid[J]. Petroleum Drilling Techniques, 2016, 44(6):24-29.
[12]	HERZHAFT B,ROUSSEAU L,NEAU L,et al. Influence of temperature and clays/emulsion microstructure on oil-based mud low shear rate rheology[C]//SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers,2002.
[13]	叶艳, 尹达, 张謦文, 等. 超微粉体加重高密度油基钻井液的性能[J]. 油田化学, 2016, 33(1):9-13. YE Yan, YIN Da, ZHANG Xinwen, et al. Performance of high-density oil-based drilling fluids improved by ultrafine powders[J]. Oilfield Chemistry, 2016, 33(1):9-13.
[14]	董悦, 盖姗姗, 李天太, 等. 固相含量和密度对高密度钻井液流变性影响的实验研究[J]. 石油钻采工艺, 2008,30(4):36-40. DONG Yue, GAI Shanshan, LI Tiantai, et al. Experimental study on the effect of solid content and density of high density drilling fluid on its rheological properties[J]. Oil Drilling & Production Technology, 2008,30(4):36-40.
[15]	罗伟, 赵永鸿, 林梅钦, 等. 固体颗粒对油水界面性质及乳状液稳定性的影响[J]. 应用化工,2009,28(4):483-486. LUO Wei, ZHAO Yonghong, LIN Meiqin, et al. The influences of solid particles on oil-water interfacial properties and emulsion stability[J]. Applied Chemical Industry, 2009,28(4):483-486.
[16]	POLITTE M D. Invert oil mud rheology as a function of temperature and pressure[C]//SPE/IADC Drilling Conference. Society of Petroleum Engineers,1985.