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A novel responsive stabilizing Janus nanosilica as a nanoplugging agent in water-based drilling fluids for exploiting hostile shale environments

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Petroleum Science 2024年第2期21卷 1190-1210页

作者： alain pierre tchameni Lv-Yan Zhuo Lesly Dasilva Wandji Djouonkep Robert Dery Nagre Lu-Xin Chen Lin Zhao Chao Ma Bin-Qiang Xie College of Petroleum Engineering Yangtze UniversityWuhan430100HubeiChina Key Laboratory of Drilling and Production Engineering for Oil and Gas HubeiChina Lost Circulation Control Laboratory National Engineering Laboratory for Petroleum Drilling EngineeringYangtze UniversityWuhan430100HubeiChina College of Petroleum Engineering Shandong Institute of Petroleum and Chemical TechnologyDongying257061ShandongChina Petroleum Engineer Research Institute of Petrochina Dagang Oilfield Tianjin300280China Department of Chemical Engineering Kumasi Technical UniversityP.O.Box 854KumasiGhana

Thermo-responsive nanocomposites have recently emerged as potential nanoplugging agents for shale stabilization in high-temperature water-based drilling fluids(WBDFs). However, their inhibitory properties have not been very effective in high-temperature drilling operations. Thermo-responsive Janus nanocomposites are expected to strongly interact with clay particles from the inward hemisphere of nanomaterials, which drive the establishment of a tighter hydrophobic membrane over the shale surface at the outward hemisphere under geothermal conditions for shale stabilization. This work combines the synergistic benefits of thermo-responsive and zwitterionic nanomaterials to synchronously enhance the chemical inhibitions and plugging performances in shale under harsh conditions. A novel thermoresponsive Janus nanosilica(TRJS) exhibiting zwitterionic character was synthesized, characterized,and assessed as shale stabilizer for WBDFs at high temperatures. Compared to pristine nanosilica(Si NP)and symmetrical thermo-responsive nanosilica(TRS), TRJS exhibited anti-polyelectrolyte behaviour, in which electrolyte ions screened the electrostatic attraction between the charged particles, potentially stabilizing nanomaterial in hostile shaly environments(i.e., up to saturated brine or API brine). Macroscopically, TRJS exhibited higher chemical inhibition than Si NP and TRS in brine, prompting a better capability to control pressure penetration. TRJS adsorbed onto the clay surface via chemisorption and hydrogen bonding, and the interactions became substantial in brine, according to the results of electrophoretic mobility, surface wettability, and X-ray diffraction. Thus, contributing to the firm trapping of TRJS into the nanopore structure of the shale, triggering the formation of a tight hydrophobic membrane over the shale surface from the outward hemisphere. The addition of TRJS into WBDF had no deleterious effect on fluid properties after hot-treatment at 190℃, implying that TRJ

关键词： Janus nanosilica Thermo-responsive copolymer Anti-polyelectrolyte effect Shale stabilizer Inhibition Plugging Drilling fluid

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P(AMPS-MBA)-g-P(AM-DEAM)的合成与温敏行为

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高分子材料科学与工程 2021年第7期37卷 35-41页

作者：温建泰罗明望陈璐鑫 alain pierre tchameni 赵林油气钻井技术国家工程实验室防漏堵漏研究室长江大学石油工程学院湖北省油气钻采工程重点实验室长江大学石油工程学院湖北武汉430100

以2-氨基乙硫醇盐酸盐(AET)为链转移剂,丙烯酰氯为链端转化剂合成了聚(丙烯酰胺-co-N,N-二乙基丙烯酰胺)(Poly(AM-co-DEAM),PADA)温敏大单体,再与2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)和N,N’-亚甲基双丙烯酰胺(MBA)通过自由基共聚,得到... 详细信息

以2-氨基乙硫醇盐酸盐(AET)为链转移剂,丙烯酰氯为链端转化剂合成了聚(丙烯酰胺-co-N,N-二乙基丙烯酰胺)(Poly(AM-co-DEAM),PADA)温敏大单体,再与2-丙烯酰胺基-2-甲基丙磺酸钠(NaAMPS)和N,N’-亚甲基双丙烯酰胺(MBA)通过自由基共聚,得到以PADA为侧链的温敏增稠共聚物(CGPADA)。采用核磁共振、元素分析确定了PADA与CGPADA的分子结构;研究了共聚物溶液的温敏增稠特性,并进一步考察了共聚物质量浓度、剪切速率和盐浓度等因素对其温敏增稠性能的影响。结果表明,当共聚物溶液达到一定浓度时,其具有优良的温敏增稠性,且增稠效果随共聚物质量浓度及外加盐浓度的增加而提升。

关键词：温敏大单体自由基共聚温敏增稠

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温敏聚合物/纳米SiO_(2)复合材料的制备与性能评价

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油田化学 2023年第1期40卷 12-18页

作者：陈璐鑫卓绿燕 alain pierre tchameni 吕军贤谢彬强长江大学石油工程学院湖北武汉430100 油气钻采工程湖北省重点实验室湖北武汉430100 油气钻井技术国家工程实验室防漏堵漏研究室湖北武汉430100 大港油田石油工程研究院天津300280

由于目前大部分温敏增稠剂的耐温抗盐性能较差,难以适用于高深储层。以自制温敏单体(PADA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、N,N-亚甲基双丙烯酰胺(MBA)和改性纳米SiO_(2)颗粒(N-np)为原料,通过原位聚合法制备了一种温敏聚合物/纳米S... 详细信息

由于目前大部分温敏增稠剂的耐温抗盐性能较差,难以适用于高深储层。以自制温敏单体(PADA)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、N,N-亚甲基双丙烯酰胺(MBA)和改性纳米SiO_(2)颗粒(N-np)为原料,通过原位聚合法制备了一种温敏聚合物/纳米SiO_(2)复合材料N-AMPA。采用正交实验优化了N-AMPA的合成条件,通过傅里叶变换红外光谱(FT-IR)、核磁共振氢谱(^(1)H-NMR)等确定了N-AMPA的分子结构,考察了N-AMPA溶液的温敏增稠性能、耐温抗盐性能和抗剪切性能。研究结果表明,N-AMPA溶液在65~180℃内具有温敏增稠性能,最大增稠率达94%;N-AMPA溶液在200℃高温老化后黏度保留率为68%;在20%NaCl盐水溶液中,黏度保留率为63%;在剪切速率为1021 s^(-1)时其溶液黏度达50 mPa·s。与温敏聚合物AMPA相比,N-AMPA表现出良好的耐温抗盐性、较强的抗剪切性能。

关键词：纳米SiO_(2)改性温敏增稠耐温抗盐抗老化抗剪切

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高温延迟交联聚合物堵漏剂的制备与性能

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油田化学 2023年第4期40卷 601-607页

作者：吕军贤卓绿燕 alain pierre tchameni 陈璐鑫谢彬强长江大学石油工程学院湖北武汉430100

针对目前凝胶堵漏材料注入性差、高温成胶时间短等问题,以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸为单体,偶氮二异丁脒盐酸盐为引发剂,聚乙烯亚胺和N,N’-亚甲基双丙烯酰胺为交联剂,以自由基聚合与聚合物交联相结合的方法,研发了一种具有成... 详细信息

针对目前凝胶堵漏材料注入性差、高温成胶时间短等问题,以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸为单体,偶氮二异丁脒盐酸盐为引发剂,聚乙烯亚胺和N,N’-亚甲基双丙烯酰胺为交联剂,以自由基聚合与聚合物交联相结合的方法,研发了一种具有成胶强度高、高温成胶时间可控等优点的高温延迟交联聚合物堵漏剂PM-1,并通过正交实验和单因素实验得到了PM-1的最优制备条件,评价了PM-1的注入性、成胶性和堵漏性,并分析了PM-1的高温延迟交联机理。结果表明,堵漏剂PM-1的最佳制备条件为:单体质量分数为10%(AM、AMPS物质的量比为4∶1),聚乙烯亚胺加量为0.4%,N,N’-亚甲基双丙烯酰胺加量为0.2%,偶氮二异丁脒盐酸盐加量为0.1%,自制聚合物BRZ加量为1.2%;该堵漏剂具有良好的注入性能;堵漏剂在130℃下老化96 h后仍可封堵粒度1.7~4 mm的砂层,与惰性材料所形成的复合凝胶对5 mm的裂缝漏层承压能力达6 MPa;添加0.4%聚乙烯亚胺能够使堵漏剂的交联时间延长3~5 h,可保证地下交联凝胶堵漏施工的顺利进行。

关键词：聚合物凝胶堵漏剂延迟交联堵漏性能

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温敏聚合物分子结构对其溶液特性的影响

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油田化学 2023年第2期40卷 330-335,344页

作者：程仲富潘丽娟李亮温建泰陈晋东 alain pierre tchameni 长江大学石油工程学院湖北武汉430100 中国石化西北油田分公司石油工程技术研究院新疆乌鲁木齐830011

为了研究温敏聚合物分子结构对其水溶液特性的影响,以自制的温敏大单体聚(丙烯酰胺-co-N,N-二乙基丙烯酰胺)[poly(AM-co-DEAM),PADA]、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N,N-亚甲基双丙烯酰胺(MBA)等单体为原料,采用自由基聚合法制备... 详细信息

为了研究温敏聚合物分子结构对其水溶液特性的影响,以自制的温敏大单体聚(丙烯酰胺-co-N,N-二乙基丙烯酰胺)[poly(AM-co-DEAM),PADA]、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和N,N-亚甲基双丙烯酰胺(MBA)等单体为原料,采用自由基聚合法制备了接枝率和相对分子质量不同的温敏聚合物(CGPADA)。采用红外光谱仪、元素分析仪、流变仪、可见分光光度计等仪器,研究了CGPADA的分子结构、外加盐类型等对CGPADA溶液温敏增稠性能的影响。结果表明,只有当温敏大单体PADA中DEAM含量处于一定范围时,CGPADA才会呈现出优良的温敏增稠性;在此范围内,DEAM含量越高、分子量越低,CGPADA溶液的临界缔合温度和浊点越低,温敏增稠现象越显著;与Na^(+)相比,Ca^(2+)对PADA侧链疏水缔合的促进作用更强,使得聚合物溶液的温敏增稠现象更加显著。盐致增稠效应与CGPADA的分子结构、盐加量以及溶液中阳离子的电荷数等因素有关。

关键词：温敏共聚物温敏增稠临界缔合温度浊点

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Fractional Crystallization and Crustal Contamination of Doleritic and Trachytic Dykes Crosscutting the Cretaceous Sedimentary Basins from Figuil (North Cameroon) and Léré(South-Western Chad): Geodynamic Implications

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Journal of Geoscience and Environment Protection 2021年第12期9卷 190-210页

作者： Moussa Ngarena Klamadji Merlin Gountié Dedzo Rigobert tchameni Djamilatou Diddi Hamadjoda pierre Christel Biakan à Nyotok Gervais Onana Département des Sciences de la Vie et de la Terre Faculté des Sciences Techniques et de la Technologie Université de Pala Pala Tchad Department of Life and Earth Sciences High Teachers’ Training College University of Maroua Maroua Cameroon Department of Earth Sciences Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon Department of Earth Sciences Faculty of Sciences University of Maroua Maroua Cameroon

Magmatism in the Cretaceous sedimentary basins of the Figuil and Léré regions constitutes one of the fundamental parameters in the reconstruction of the history of the Cretaceous sedimentary basins. The main objective of this paper is to constrain the petrogenetic processes of hypovolcanic rocks and to determine their geodynamic context of emplacement. The petrographic study of mafic hypovolcanic and trachytic rocks was carried out under a polarizing microscope on thin sections. For the geochemical study, the major oxides and some trace elements were analyzed by ICP-AES. Trace and rare earth elements were analyzed by ICP-MS. The dolerites of the Cretaceous sedimentary basins are composed of dykes of amphibole bearing dolerites, biotite and pyroxene bearing dolerite, pyroxene bearing dolerites and trachytes. The dykes are in the order of 20 to 100 m wide by several kilometers long and oriented from N23°E to N90°E. The textures of these rocks are sub-ophitic to intergranular for dolerites and trachytic for evolved rocks (trachytes). The geochemical study shows that the dolerites are basaltic in composition with alkaline to subalkaline character. The sampled dykes have an evolution dominated by fractional with the minor impact of the crustal assimilation characterized by low Rb/Y ratios for dolerites (0.36 - 0.97) and high values of Rb/Y for the Pan-African granitoids’ samples (1.95 - 4.01). The nature of doleritic and t

关键词： Dolerites Trachyte Sedimentary Basins Continental Tholeiites Figuil and Léré

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Lu-Hf Isotopic Data of the Mbé-Sassa-Mbersi Tonalite (Central Cameroon Domain): Indicator of ca. 1.0 Ga Juvenile Tonian Magmatism in the Region

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Journal of Geoscience and Environment Protection 2021年第9期9卷 1-19页

作者： Alliance Nicaise Saha-Fouotsa Rigobert tchameni Olivier Vanderhaeghe Armin Zeh Periclex Martial Fosso Tchunte Aurélien Eglinger Emmanuel Negue Nomo pierre Barbey Department of Earth Sciences Faculty of Science University of Maroua Maroua Cameroon Department of Earth Sciences Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon GET Université de Toulouse UPS CNRS IRD CNES Toulouse France KIT-Karlsruher Institut für Technologie Campus Süd Institut für Angewandte Geowissenschaften Abteilung Mineralogie und Petrologie Karlsruhe Germany Université de Lorraine CNRS GeoRessources Nancy France Department of Earth Sciences Faculty of Science University of Yaoundé I Yaoundé Cameroon Université de Lorraine CNRS CRPG Nancy France

The Pan-African/Brasiliano orogenic belts are a part of numerous Neoproterozoic orogenic belts that belong to the long-lived orgenic cycle that distancing phase started at the Tonian around 1.0 Ga. The Tonian magmatism fairly documented in the Neoproterozoic belts of Borborema Province (NE-Brazil), seemed so far inexistent in the Central African Orogenic Belt (CAOB) although these two belts were geologically correlated. Through the Lu-Hf geochronological analysis on zircon of tonalite, the present work, coupled with the previous data, suggests the existence of a Tonian age magmatism in the Central Cameroon Domain of the CAOB although the latter is much reworked. The Nguesseck tonalite outcrops in the northern part of the Mbé-Sassa-Mbersi region, in the northern edge of Central Cameroon Domain of the CAOB and in the Tcholliré-Banyo shear zone (TBSZ). The Lu-Hf data obtain on the zircon grains of this tonalite reveal juvenile HfTDM age of ca. 1.0 Ga. This age, combined to the previous geochemical data suggests that the protholites of this tonalite would have extracted from the source during the distancing phase (rifting and oceanization) of the Pan-african/Brasiliano orogeny at the early Neoproterozoic.

关键词： Mbé-Sassa-Mbersi Central Cameroon Domain Central African Orogenic Belt Tonian magmatism Lu-Hf Isotopic Data

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Petrography and Geochemistry of the Mbip Granitic Massif, SW Tcholliré(Central North Cameroon): Petrogenetic and Geodynamic Implication

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International Journal of Geosciences 2015年第7期6卷 761-775页

作者： Emmanuel Nomo Negue Rigobert tchameni Olivier Vanderhaeghe pierre Barbey Periclex Martial Fosso Tchunte Jonas Didero Takodjou Wambo Brice Yanick Lemdjou Nicaise Alliance Saha Fouotsa Department of Earth Sciences Faculty of Science University of Yaoundé Yaoundé Cameroon Department of Earth Sciences Faculty of Science University of Ngaoundéré Ngaoundéré Cameroon CNRS UMR7359 GeoResources Vandoeuvre-lès-Nancy Cedex France CNRS UMR7358 CRPG Vandoeuvre-lès-Nancy Cedex France Université de Lorraine Nancy France GET Université Paul Sabatier Toulouse France

In this article, we discussed about the petrography and geochemistry of magmatic rocks of the?Mbip massif?located SW of Tcholliré, in Central North Cameroon (Central African Fold Belt). Petrographic study shows that this massif is made of granodiorite, amphibole-biotite granite, and biotite granite which often contain enclave of mafic rocks (gabbro). Granodiorites and granites show porphyritic texture and consist dominantly of plagioclase and alkaline feldspar phenocrysts, quartz, biotite and often few amphibole. The gabbro enclaves are characterized by a granular porphyroid texture constituted of amphibole, plagioclase and olivine phenocrysts, all in a matrix of small crystals of plagioclase, olivine, amphibole, pyroxene and opaque minerals. All the analyzed rocks provide geochemical features of sublkaline serie and have nothing to do with the alkaline nature previously signaled in the former works. Granodiorites and granites are shoshonitic to calc-alkaline strongly potassic affinity consistent with emplacement in the continental collision setting. They present positive anomalies in Rb, Th, U;negative anomalies in Sr, P, Ti, Nb, Ta and some facies contain hydrated minerals such as amphibole. These characters are consistent with crustal and mantle contribution in their genesis. The mafic rocks (gabbro) have geochemical characteristics conferring a mantle origin, as confirmed by the high Mg# value (49.9). On the whole, the fractional crystallization of the magma formed by melting of crustal material and the magmatic mixing are the main petrogenetic process in the Mbip massif. Petrographic studies and geochemical data shows that the Mbip massif was emplaced in an active continental margin, into transitional regime from the end of maximum compression to the beginning of relaxation.

关键词： Central African Fold Belt Granitic Rocks Mafic Rocks Transitional Regime Active Margin.

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