Advanced Materials Research Vols. 616-618

Abstract: The L oilfield Cretaceous (M-I-1), Jurassic Department (Ю-0-3) clastic pore types, including primary porosity, secondary porosity and cracks in three categories, their characteristics and the degree of development. Chalk Department of particles holes and grain dissolution porosity, an average of 53.2%, followed by argillaceous porous and contraction joints, while a small number of particles dissolved pore, showing a small amount of paste particles seam and tensile crack; Jurassic inter-granular holes and intra-granular dissolution porosity is developed, accounting for the porosity as high as 95%, while a small amount of argillaceous porous and granulizing hole and a very small amount of mold holes. L Oilfield Cretaceous and Jurassic reservoirs inter-granular pores, inter-granular dissolution pore, pore throat combination M-I-1, mainly to large - in the hole, micro-throat, Ю-0-3 large - in the hole Extra Coarse - rough throat-based thin throat, Ю-0-1, Jurassic sandstone pore structure better than the Cretaceous.

Abstract: Predicting the driving force accurately is the key process to hydrate nucleating and growing of hydration reaction. The nucleating and growing process of hydrate is relevant to temperature, pressure and component of reactant, and the property of reaction tank and intermiscibility of reactant have notable effect on the formation process of hydrate with its nucleating position, the induction time, growth rate and hydration rate. However, the present driving force model of hydrate cannot predict nucleating area, induction time, growth rate and the reaction limit, and also can't explain the influence of some factors such as cooling rate, temperature disturbance and inlet way on the hydration reaction, it is uncertain of the process to gas hydrate nucleation. We introduced some driving force models, analyzed their merits and demerits, and looked into the distance of research direction to driving force in the future.

Abstract: The static test data of past years the Sebei gas field are classified. The reason why the pressure drop-down curve are straight, or ascends or curves downward are analyzed with the characteristic of water influx, reperforating, transfer layers, sand burial, sand control, layers and wells interference of the typical wells. Then, two revised material balance models based on the deviation of pressure drop curve are introduced to calculate the dynamic reserve of this gas field with different pressure drop curves. It was proved that the method is an effective approach to evaluate precisely dynamic reserves of gas wells.

Abstract: In order to simplify the operation process of water injection station and improve the utilization rate of water injection. We carried out the experiment of pumping under pressure and shunting pump when installed the rotor frequency control devices. The results shows that when the start pressure ranges from 0MPa to 15MPa, the surge current of power system keeps below the maximum allowed surge current so that the water injection pump runs smoothly and the instruments and devices are in good condition. And so does the system when the pressure changes from 0MPa to 16MPa in the shunting pump under pressure experiment. By making use of the rotor frequency control devices, the station reduces the labor intensity and simplifies the operation. Besides, the utilization rate of water injection is improved.

Abstract: The flow regimes included low velocity non-Darcy flow, Darcy flow, inertia flow, and turbulence in some porous media. In abnormal high pressure gas reservoir, the flow velocity was higher than conventional reservoir. Due to turbulence flow, there would be unique flow characteristics in these reservoirs. The deliverability equation of gas well should be expressed by cubic term, containing Darcy term, Visco-Inertial term and turbulence term, instead of Forchheimer’s quadratic equation. The turbulence coefficient, the main parameter in the cubic term, was directly related to the absolute open flow. So far, there is no method to obtain this parameter based on gas field data. Also there is no acceptable correlation for the turbulence coefficient applicable to field conditions. An empirical correlation was established using multiple linear regression method to determine the turbulence coefficient through the Ka Lasu’s well test data. We also calculated the parameters for the other well in this field. The results show that this correlation is more accurate and more useful than the formula established by Ezevdembah on basis of the core data in laboratory.

Abstract: In this study, Pseudomonas aeruginosa N2 was used to investigate the effects of biodegradation on paraffin crude oil for microbial enhanced oil recovery. Hydrocarbon degradation and the polar component production were illustrated by different analysis methods, respectively. Strain N2 had a high emulsion capability to enhance the dissolution of crude oil, which improved the utilization of crude oil. GC-MS results showed that the relative abundance of heavy hydrocarbon was decreased after biodegradation with the increase of hydrocarbon fractions of C₁₉, C₂₀ and C₂₅. ESI FT ICR-MS was used to study the changes of the polar components. Analysis revealed that the relative abundance of N₁ and O₁ species was decreased, corresponding to the increase of the relative abundance of N₁O₁, N₁O₂, N₁O₃ and O₂ species. These polar components have the effort to reduce the interface tension and oil viscosity, thereby promoting anti-coalescence and reducing plugging to enhanced oil recovery.

Abstract: The Paris Basin encompasses most part of the northern half of France and is roughly circular in shape, centered around the city of Paris. Three known source rocks intervals are recognized in the basin. Main reservoirs in the basin were composed of the Triassic sandstones, Middle Jurassic (Dogger) limestones and Lower Cretaceous (Neocomian) sandstones. Interbedded continental red shales provide seals for the Middle Triassic deltaic sandstones and parallel dolomitic reservoirs. There were the nine hydrocarbon plays in the basin. Three known petroleum systems are recognized in the basin. They are Upper Carboniferous - Triassic, Middle Lias - Triassic and Upper Lias - Dogger petroleum systems.

Abstract: The Northern Apennines lies in the northern Italian Peninsula. The basin has the formation of Mesozoic-Cenozoic depocentries. The source rock is Emma limestone and Late Triassic source rock, which generated at the depth of 5-7 km. The reservoir included the Upper Cretaceous-Eocene Scaglia Formation and Liassic Noriglio Limestone. The seal included Scaglia Cinerea Formation, Cerro Marls Formation and unconformity upper marls. The petroleum systems are The Emma Petroleum System and Marnoso Petroleum System.

Abstract: This paper introduces American shale gas resource development experience and technique. The author also discusses China's shale gas resource potential and current states of exploration and development. Based on this information, this paper puts forward some strategic concepts of accelerating shale gas development in China.

Abstract: Using the technology of hydraulic injection radial drilling can effectively solve the problem of low permeability oilfield development. Aiming at the the problem that reducing the rock fragmentation efficiency because of the recoil force in the process of the construction of hydraulic injection radial drilling, study the velocity distribution under different diameter, calculate the recoil force, rock breaking force and propelling force, and optimize the process parameters of hydraulic injection radial drilling technology by using the numerical simulation method.