一种油基钻井液用支化型流型调节剂及其应用  

A Branched Flow Pattern Regulator for Oil-based Drilling Fluid and Its Application

作　　者：李舟军[1] 王显光[1] 王松[2] 

机构地区：[1]中国石化石油工程技术研究院页岩油气富集机理与有效开发国家重点实验室,北京100101 [2]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《长江大学学报（自然科学版）》2018年第7期53-57,92,共6页Journal of Yangtze University(Natural Science Edition)

基　　金：国家自然科学基金项目(51490650);国家科技重大专项(2016ZX05061)

摘　　要：针对油基钻井液结构力提升困难的问题,合成了一种支化型流型调节剂ASA。该流型调节剂在矿物油中能有效地提升钻井液的动切力、初切和终切值。以此为基础,研制了一套高切力、低油水比的油基钻井液,其油水比可低至70∶30,动塑比可达0.3~0.5Pa/(mPa·s),体系抗高温达到200℃,密度适用范围为1.0~2.1g/cm3。现场应用表明,高切力低油水比油基钻井液体系具有很强的抑制页岩水化和稳定井壁的性能,防塌效果显著,流变性能好,结构力强,易于携砂携岩和井眼清洁,能很好地满足超长水平段页岩气井的安全施工需求。In allusion to the problem of difficulty in structural force lifting for oil-based drilling fluid,a branched flow pattern regulator ASA was synthesized.ASA could be used for effectively lift the dynamic shear,initial and final shear values of drilling fluid in mineral oils.Based on the study,a set of oil-based drilling fluid system with high shear and low oil-water ratio was developed,its oil-water ratio could be as low as 70∶30,and its dynamic shear-plastic viscosity ratio was up to 0.3～0.5 Pa/(mPa·s)with the high temperature resistance of 200℃,its density range was 1.0～2.1 g/cm3.Field application indicates that the oil-based drilling fluid system with high shear and low oil-water ratio has a high performance of inhibiting shale hydration and wellbore stability with obvious effect of anti-sloughing and good rheology,it has a strong structural force and easy for sand and rock carrying for borehole cleaning,it can well satisfy the needs of safe operation in ultra-long horizontal sections of shale gas wells.

关 键 词：高切力 低油水比 油基钻井液 动塑比 

分 类 号：TE254[石油与天然气工程—油气井工程]