加重剂对高密度白油基钻井液性能的影响  

Effects of weighting agent on properties of high density white oil-based drilling fluid

作　　者：樊朋飞 FAN Pengfei(Drilling and Completion Fluid Technology Center of Sinopec Petroleum Engineering,Research Institute of Drilling En-gineering Technology Sinopec Zhongyuan Oilfield Service Corporation,Puyang 457001,China)

机构地区：[1]中石化石油工程钻完井液技术中心,中石化中原石油工程有限公司钻井工程技术研究院,河南濮阳457001

出　　处：《精细石油化工进展》2024年第3期9-14,共6页Advances in Fine Petrochemicals

基　　金：中国石油化工股份有限公司重点科研项目“特深层安全高效钻井关键技术”(P21081-2);中石化中原石油工程有限公司重点科研项目“合川-潼南区块中深部地层防漏堵漏技术研究”(2023308)。

摘　　要：随着环保形势的日趋严峻,低毒性白油基钻井液在非常规油气藏钻井中逐渐得到广泛应用,而不同加重剂对白油基钻井液性能影响的系统研究较少。为此,本文在分析普通重晶石、微锰矿粉和毫微粉体3种加重剂粒径和形态的基础上,对比了3种加重剂单独加重以及微锰矿粉和普通重晶石复配加重形成的超高密度白油基钻井液的性能。结果表明:加重剂微观形态和粒径是钻井液性能差异的关键因素。当钻井液密度大于2.1g/cm^(3)时,微粉加重剂配制的高密度白油基钻井液流变性、润滑性和沉降稳定性优于普通重晶石,但中压失水量略高。按质量比1∶1将微锰矿粉与普通重晶石复配加重后,滤失量由6.0mL下降至3.6mL,弥补了微锰矿粉单一加重高密度白油基钻井液失水大的缺陷。重晶石和微粉加重剂复配加重是未来高密度油基钻井液、超高密度钻井液的发展方向。With the increasingly severe environmental protection situation,low toxicity white oil⁃based drill⁃ing fluids are gradually widely used in unconventional oil and gas reservoir drilling,and there is less systemat⁃ic research on the impact of different weighting agents on the performance of white oil⁃based drilling fluids.Therefore,the size and morphology of ordinary barite,micromanganese ore powder and micropowder barite were analyzed by laser particle size analyzer and scanning electron microscope.The properties of ultrahigh den⁃sity white oil base drilling fluid formed by three weights separately and micromanganese ore powder and com⁃mon barite combined weights were compared.The results indicated that the microstructure and particle size of the weighting agent were the key factors leading to differences in drilling fluid performance.When the density was greater than 2.1 g/cm^(3),the rheological properties,lubricity and settling stability of the high density white oil⁃based drilling fluid configured with micro powder weighting agent was better than that of the ordinary bar⁃ite,but the middle pressure water loss was slightly higher.When the micromanganese ore powder was mixed with ordinary barite at the ratio of 1∶1,the filtration loss decreased from 6.0 mL to 3.2 mL,which made up for the defect of micromanganese ore powder only aggravating the large water loss of high density white oil⁃based drilling fluid.The combination of barite and micro powder weighting agent is the development direction of high density oil⁃based drilling fluids and ultra high density drilling fluids in the future.

关 键 词：微锰矿粉 流变性 沉降稳定性 加重剂 高密度白油基钻井液 

分 类 号：TE254[石油与天然气工程—油气井工程]