Abstract:
The strength of a proppant or sand control particulate may be improved by coating the proppant to form a composite. The composite has enhanced compressive strength between about 34 to about 130 MPa and minimizes the spalling of fines at closure stresses in excess of 5,000 psi. Conductivity of fractures is further enhanced by forming a pack of the composites in the fracture.
Abstract:
Migration of formation solids in a wellbore is restrained by feeding a slurry, comprising water, a viscosifier, and a concentration of cement clinker particles, into the wellbore, and hydrating the clinker particles in the wellbore. The clinker particles are kept in suspension during the hydrating, and upon completion of the hydrating the hydrated clinker particles form a hardened cement consisting of a permeable structure of interconnected hydrated clinker particles. A layer of degradable lost circulation material (LCM) may be employed to separate the slurry with clinker particles from the formation surrounding the wellbore during hydrating of the clinker particles.
Abstract:
The present application relates to coated silica particles, compositions containing the coated silica particles, and methods for using these compositions in subterranean formations. The coated silica particle includes a cationic species non-covalently bound to an outer surface of the particle. The particle can include a nanoparticle.
Abstract:
Es wird ein Verfahren zur Herstellung eines Bindemittels umfassend ein Hetero- kondensat aus Siliziumverbindungen und Metall- oder Borverbindungen beschrieben, bei dem eine hydrolysierbare Siliziumverbindung mit einer nicht hydrolysierbaren polymerisierbaren Gruppe als Si-Komponente mit Wasser unter Bildung eines Hydrolyseprodukts vermischt wird und dann eine Metall- oder Borverbindung, wobei das Metall ausgewählt ist aus AI, Ga, In, Tl, Ge, Ga, Sn, Pb, Ti, Zr, Hf, Sc, Y und La, zum Hydrolyseprodukt zu einem Zeitpunkt zugegeben wird, der innerhalb von 15 s bis 15 min nach der Vermischung der hydrolysierbaren Siliziumverbindungen mit dem Wasser liegt. Es werden homogene Heterokondensate erhalten, die als Bindemittel ausgezeichnete Beständigkeit und Festigkeit ergeben. Die Bindemittel eignen sich vorzüglich zur Verfestigung von geologischen Formationen und von Granulat-Schüttungen, die bei der Öl- und Gasförderung zum Freihalten der Quellen eingesetzt werden.
Abstract:
Gravel pack fluids and methods of use thereof provides improved fluid suspension characteristics under extremely high temperatures, for example, from about 275°F to 300°F (135°C to 149°C) or higher. The disclosed the gravel pack fluids are able to achieve stability at these elevated temperatures by virtue of a gel composition having natural or synthetic hectorite nanoparticles added thereto. Such gravel pack fluids are especially useful for delivering proppant into a subterranean formation, gravel into a wellbore, and the like, in certain parts of the world known to have extremely high downhole temperatures. The disclosed gravel pack fluids are particularly useful for inclined and horizontal well applications, as well as applications that involve transporting particulates through alternate flow paths, such as shunt tubes, bypass conduits, and the like.
Abstract:
Изобретение относится к нефтедобывающей промышленности, а именно к технологии интенсификации добычи нефти и обеспечивает повышение стабильности эмульсионного раствора для комплексной технологии интенсификации добычи нефти. В способе обработки призабойной зоны пласта указанную зону обрабатывают последовательно эмульсионным раствором, буферной оторочкой нефти и кислотной композицией, причем, предварительно определяют смачиваемость горных пород призабойной зоны пласта и в случае гидрофильности горных пород применяют эмульсионный раствор прямого типа следующего состава, % масс: углеводородная фаза - 20-25, эмульгатор - 3-5, раствор наночастиц коллоидной двуокиси кремния - 0,5-3, водная фаза - остальное, а в случае гидрофобности указанных пород применяют эмульсионный раствор обратного типа следующего состава, % масс: углеводородная фаза - 40-45, эмульгатор - 3-5, раствор наночастиц коллоидной двуокиси кремния - 1-3, водная фаза - остальное.
Abstract:
A method of controlling sand production in a sandstone reservoir comprising providing (i) an aminosilane and (ii) a polymeric linking agent comprising monomeric units having pendent functional groups selected from the group consisting of carboxylic acids, carboxylic acid esters and amides, wherein a plurality of the pendent functional groups are reacted with the amino group of the aminosilane by a process selected from the group consisting of aminolysis of carboxylic acid ester groups, Mannich reaction between the amino group of the aminosilane and a plurality of at least one of carboxylic acid and amide pendent groups in the presence of an aldehyde activating agent or combination thereof, contacting the aminosilane and polymeric linking agent with the sandstone reservoir to bond the silane group of the aminosilane with particles of sand and provide agglomeration as a result of covalent bonding of the linking agent with a plurality of aminosilanes.
Abstract:
Wellbore strengthening compositions may include a base fluid; and a solid gum rosin additive, wherein the solid gum rosin additive has an average particle size of 1 μm to 15 mm. Methods may include emplacing a wellbore fluid containing a solid gum rosin additive into a wellbore, wherein the solid gum rosin additive has an average particle size of 1 μm to 15 mm.
Abstract:
A method of consolidating a fracture in a formation comprises injecting a solution of an alkali metal silicate into the formation causing the solution to react with the surfaces of the calcium containing inorganic compound deposits, locking the fine material on these surfaces in place and preventing fines generation during production in a well.
Abstract:
A thixotropic composition having a cross-linkable polymer, cross-linking agent, initiator and a thixotropic agent. The thixotropic agent may be a clay or a saccharide polymer. The thixotropic composition may be introduced into a drill string via a batch or on-the-fly process to prevent loss of drilling fluid into the surrounding formation.