摘要
微锰具有更小的粒径、更高的密度以及可酸溶性,因此具有优异的沉降稳定性和储层保护性能,适用于抗高温高密度钻井完井液。以中海油田服务股份有限公司的密度为2.04 g/cm^(3)的MODRILL合成基钻井液体系为基础,研究了重晶石(4.3 g/cm^(3))、重晶石(4.4 g/cm^(3))和微锰(4.8 g/cm^(3))加量配比分别为10∶0∶0、0∶10∶0、5∶0∶5、6∶0∶4、7∶0∶3、8∶0∶2、5∶5∶0条件下,加重材料对合成基钻井液性能的影响。结果发现,不同加重材料对合成基钻井液的流变性能、电稳定性和高温高压滤失量都有较大的影响;微锰加量的增加会降低合成基钻井液的表观黏度和塑性黏度,增加动切力和φ6读数,会降低体系的破乳电压,但整体上可以满足作业要求,还会大幅度增加体系的高温高压滤失量;重晶石(4.3 g/cm^(3))∶微锰(4.8 g/cm^(3))的配比为5∶5时,体系综合性能最佳,缺点为成本相对较高,对于储层保护要求较低的现场,可以用超细重晶石(4.4g/cm^(3))来代替微锰(4.8 g/cm^(3)),使重晶石(4.3 g/cm^(3))∶重晶石(4.4 g/cm^(3))的配比为5∶5。现场添加不同加重材料的合成基钻井液的性能测定结果验证了上述结论。
The influence of different weighting agent on the performance of synthetic drilling fluid system(SBM)were studied in this work.Based on the MODRILL drilling fluid system of China Oilfield Services Co.,LTD.,the variation of SBM performance with 2.04 g/cm^(3)were investigated with different weighting agent of 4.3 g/cm^(3)Barite,4.4 g/cm^(3)Barite and 4.8 g/cm^(3)Trimanganese tetra oxide with the ratio of 10∶0∶0、0∶10∶0、5∶0∶5、6∶0∶4、7∶0∶3、8∶0∶2、5∶5∶0.The results showed that the rheological property,emulsion-breaking voltage and high temperature and pressure filtration are affected by the different weighting agent.The apparent viscosity and the plastic viscosity would be decreased and the yield point and 6 rpm reading would be increased with the increasing trimanganese tetra oxide.The emulsion-breaking voltage would be decreased with the increasing trimanganese tetra oxide.The high temperature and high pressure filtration would be substantially increased when adding the increasing trimanganese tetra oxide.The above conclusions were verified in the filed test by studying the effect of weighting agent on the performance of synthetic drilling fluids.
作者
任亮亮
陈晨
李超
何卓芯
胡悦悦
徐博韬
罗健生
高二虎
REN Liangliang;CHEN Chen;LI Chao;HE Zhuoxin;HU Yueyue;XU Botao;LUO Jiansheng;GAO Erhu(Oilfield Chemicals R&D Institute,China Oilfield Services Co.,Ltd.,Yanjiao,Hebei 065201)
出处
《钻井液与完井液》
CAS
北大核心
2023年第5期551-555,共5页
Drilling Fluid & Completion Fluid
基金
国家重点研发项目“超深水极低温井筒工作液体系”(2022YFC2806503)。
关键词
高密度油基钻井液
加重剂
微锰
流变性能
破乳电压
高温高压滤失量
Drilling fluid
Weighting agent
Trimanganese tetra oxide
Rheological property
Emulsion-breaking voltage
High temperature and pressure filtration
