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China University of Petroleum (East China)
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In recent years, improving the quality and modification of the composition of cement slurry in or... more In recent years, improving the quality and modification of the composition of cement slurry in order to reduce the fluid migration behind the well casings is one of the most important challenges for researchers and oil and gas well drilling industries. It has been demonstrated that nanoparticles have made some progresses in the operational characteristics of conventional cement. Various technologies have been developed to solve gas migration where is an important task to design a cement slurry that do not let the hydrocarbon fluid migrate from the cement after its hydration. This research, via 13 experimental attempts, showed that great improvement in compressive strength and rheological properties of cement slurry appears after addition of silicon dioxide nanomaterial to the slurry, on the other hand it did not make any significant change in free water content of the cement and fluid loss. In the case of static gel strength analyzers (SGSA) test, transient time followed a decrement...
There are various vital reasons for cementing operation, in which fluid migration through cement ... more There are various vital reasons for cementing operation, in which fluid migration through cement slurry, as one of the most dangerous and complicated challenges faces drilling industry has been occurred. This phenomenon has become a global problem with its disastrous effects this review paper focused on the gas migration types, factors affecting on each of them and some theoretical and experimental solution. Immediate, short term and long term are the three types of gas migration based on the lifecycle of the well. There are different strategies to prevent gas migration, each type of migration have special strategies. Technical solution development, application of different cement additives in cement slurry and prediction technique for cement quality are number of strategies are developed. Hydrostatic pressure less than pore pressure and the existence of a path to gas migration are two major factors that must be stopped simultaneously to prevent migration. Understanding the mechanis...
Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles
One of the main problems during oil well completion and cementing operation is fluid migration th... more One of the main problems during oil well completion and cementing operation is fluid migration through cement bulk or behind the cemented casing. Slurry composition and characteristic have been focused and improved in last decades to mitigate gas migration and, recently, aspects such as using nanotechnology have been investigated to amend the conditions. In this research, two moderate base slurries with 95 and 120 Pound per Cubic Feet (PCF) densities containing different percentages of nanosilica have been examined using a perfect test package. The results of Fluid Migration Analyzer (FMA) demonstrated that using correct percentage of nanosilica particles modified rheological behavior of the slurries and decreased fluid migration volume. Moreover, adding nanoparticles did not have any negative effects on any conventional parameters. However, static gel strength analyzer showed significant transient time reduction which is an important key in cement setting profile. Triaxial test res...
South African Journal of Chemical Engineering
In recent years, improving the quality and modification of the composition of cement slurry in or... more In recent years, improving the quality and modification of the composition of cement slurry in order to reduce the fluid migration behind the well casings is one of the most important challenges for researchers and oil and gas well drilling industries. It has been demonstrated that nanoparticles have made some progresses in the operational characteristics of conventional cement. Various technologies have been developed to solve gas migration where is an important task to design a cement slurry that do not let the hydrocarbon fluid migrate from the cement after its hydration. This research, via 13 experimental attempts, showed that great improvement in compressive strength and rheological properties of cement slurry appears after addition of silicon dioxide nanomaterial to the slurry, on the other hand it did not make any significant change in free water content of the cement and fluid loss. In the case of static gel strength analyzers (SGSA) test, transient time followed a decrement...
There are various vital reasons for cementing operation, in which fluid migration through cement ... more There are various vital reasons for cementing operation, in which fluid migration through cement slurry, as one of the most dangerous and complicated challenges faces drilling industry has been occurred. This phenomenon has become a global problem with its disastrous effects this review paper focused on the gas migration types, factors affecting on each of them and some theoretical and experimental solution. Immediate, short term and long term are the three types of gas migration based on the lifecycle of the well. There are different strategies to prevent gas migration, each type of migration have special strategies. Technical solution development, application of different cement additives in cement slurry and prediction technique for cement quality are number of strategies are developed. Hydrostatic pressure less than pore pressure and the existence of a path to gas migration are two major factors that must be stopped simultaneously to prevent migration. Understanding the mechanis...
Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles
One of the main problems during oil well completion and cementing operation is fluid migration th... more One of the main problems during oil well completion and cementing operation is fluid migration through cement bulk or behind the cemented casing. Slurry composition and characteristic have been focused and improved in last decades to mitigate gas migration and, recently, aspects such as using nanotechnology have been investigated to amend the conditions. In this research, two moderate base slurries with 95 and 120 Pound per Cubic Feet (PCF) densities containing different percentages of nanosilica have been examined using a perfect test package. The results of Fluid Migration Analyzer (FMA) demonstrated that using correct percentage of nanosilica particles modified rheological behavior of the slurries and decreased fluid migration volume. Moreover, adding nanoparticles did not have any negative effects on any conventional parameters. However, static gel strength analyzer showed significant transient time reduction which is an important key in cement setting profile. Triaxial test res...
South African Journal of Chemical Engineering