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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids
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作者 Jian Li Yu-Xi Ji +3 位作者 Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期1980-1991,共12页
During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtr... During ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a challenge.Herein,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,DADC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether crosslinker.Due to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the DADC copolymer exhibited outstanding temperature-and salt-resistance.The rheological experiments have shown that the DADC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing performance.The DADC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling fluids.Moreover,the drilling fluids constructed based on the DADC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)environments.Therefore,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering. 展开更多
关键词 Fluid loss reducer Temperature-and salt-resistance Hydrophobic association AMPHOTERIC Micro-crosslinking
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阿北安山岩油藏裂缝发育特征对开发的影响 被引量:10
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作者 LIANG Guan-zhong 王群超 +2 位作者 夏欣 张欣 李季红 《石油勘探与开发》 EI CAS CSCD 北大核心 2001年第2期64-66,72,共4页
阿北安山岩油藏位于二连盆地阿南凹陷阿尔善构造带中部,储集体是多套安山岩层(岩流层或熔岩体)叠加形成的裂缝-孔隙型储集层,裂缝(尤其是次生裂缝)是主要的渗滤通道,有效储集层集中分布于裂缝发育的安山岩层上部。阿北安山岩油... 阿北安山岩油藏位于二连盆地阿南凹陷阿尔善构造带中部,储集体是多套安山岩层(岩流层或熔岩体)叠加形成的裂缝-孔隙型储集层,裂缝(尤其是次生裂缝)是主要的渗滤通道,有效储集层集中分布于裂缝发育的安山岩层上部。阿北安山岩油藏注水开发1a后产量就快速递减,裂缝对开发的影响表现为:①投产初期,缝孔段厚度越大且裂缝越发育,单井产量越高;②注水开发阶段,受效较好、产量高而稳定的油井主要分布于断层附近或构造高部位;③由于裂缝发育差异,注水开发过程中油井含水上升规律可分为4种类型(注水不受效型,微细裂缝受效型,裂缝水驱型,早期水淹型)。该油藏裂缝发育的油井开发初期压裂效果好,注水开发形成低压低产的油井压裂效果差,分采分注和堵水措施无效,结合化学调剖的周期注水效果较好。研究裂缝分布发育规律及对开发的影响,可以为注水开发中、后期动用导流大裂缝之间微细裂缝中的原油提供科学依据。图1参2(王孝陵摘) 展开更多
关键词 阿北安山岩油藏 裂缝发育特征 注水开水
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