The energy consumption of oil gathering increases rapidly after the oil field enters the high water cut stage.If the normal temperature gathering and transportation is carried out,the cost can be saved,which can bring the enterprise benefit.In order to judge whether the pipeline can carry out normal temperature gathering and transportation,according to the field measured data,the thermo⁃hydraulic calculation model is constructed and modified, the thermo⁃hydraulic coupling calculation is carried out, the normal temperature gathering and transportation radius of the pipeline is determined,and the sensitivity of each influencing factor of the normal temperature gathering and transportation radius is sequenced by the single factor sensitivity analysis method.On this basis,the normal temperature gathering radius chart is developed to provide guidance for the surface normal temperature gathering work.The results show that the modified thermo⁃hydraulic model can predict the pressure drop and temperature drop of the pipeline,and the average relative errors between the calculated value and the measured value are 9.42% and 5.31%.The three most influential factors on the normal temperature gathering radius are the starting point temperature,the starting point pressure and the liquid production.The chart drawn by the above three factors provides the basis for the feasibility of normal temperature gathering and transportation in the pipeline,if not,the temperature and pressure required for the starting point of the pipeline can be determined by querying the chart.

According to the principle of least square method, the H-Q curve of the centrifugal pump is fitted with power function, polynomial and exponential function, and the error analysis of fitting curve is carried out by using the data of factory performance curve. The results show that the accuracy of fitting with polynomial is higher. After the fitting is completed, the centrifugal pump will have a certain deviation from the factory performance curve provided by the equipment manufacturer in actual operation. Because the number of pump operation data may be very small, the output performance curve is corrected by moving up and down from left to right. To correct the factory performance curve, the actual engineering data are used to correct the performance curve, which makes the corrected performance curve more applicable to actual production. An example analysis shows that the head is calculated to be 60 m without correction and 94 m after calibration. Assuming that a pump can provide a head of 60 m, if we use the pump scheme without correction, one pump is turned on, but in fact one pump is far from satisfactory. Therefore, the calibration of the pump's factory performance curve has a great influence on the subsequent pumping schemes.

The oil depot stores a large number of flammable and explosive materials. The operation process of the equipment is relatively complex and prone to accidents. Therefore, employees can only get on the job after training. The traditional training system is biased theory, and the training effect is poor. Taking Unity3D as the development platform, this paper develops an interactive virtual oil depot training system. The system adopts C# as the development language of interactive script and SQL Server for data management. It implements the functions of equipment attribute query, equipment interaction operation, and important process flow simulation in the form of first person view roaming. The system has a very real three⁃dimensional effect and interaction function, and strengthens the training effect of the oil depot staff.

MoS2 (labeled as MoS2⁃1 and MoS2⁃2) was prepared by in⁃situ decomposition of water⁃soluble molybdenum⁃based catalyst and oil⁃soluble molybdenum⁃based catalyst.In order to explore the effect of two types of molybdenum catalyst in slurry⁃bed hydrocracking and preliminary theoretical analysis,the catalysts were characterized by XRD analysis,particle size analysis,SEM analysis and evaluation of reaction performance.Autoclave evaluation results showed that,compared with adding oil⁃soluble catalysts,the transformation rate and coke yield rate were better than that by adding water⁃soluble catalyst.The results of XRD analysis showed that the crystalline state of MoS2⁃1 was poor.The characteristic peaks of MoS2⁃2 were sharp and the crystalline state was good,so the hydrogen could be activated to activate hydrogen and the coke yield rate was reduced.The results of SEM analysis and particle size analysis showed that the MoS2⁃2 was smaller and the diameter was mainly 1~5 μm.MoS2⁃1 was larger and the diameter was mainly 6~10 μm.MoS2⁃2 catalyst had smaller particle size and uniform particle size distribution which could provide more hydrogenation active centers to improve the conversion rate of the reaction.

Water lock damage is one of the main damage ways in low porosity and low permeability oil and gas fields, seriously affecting the normal exploitation of oil and gas fields. In order to find out the main factors affecting the water lock effect and effective methods to remove water lock damage, the variation of gas permeability before and after the reservoir core water lock was studied and the degree of water lock of rock samples was quantitatively evaluated using the rock samples from the condensate gas reservoir in Jilin oilfield as raw materials, through the indoor water lock damage experiment of reservoir core. The results showed that water lock effect was mainly caused by the water saturation, pore throat radius, the watersensitive illite, Yimeng mixed layer in the clay minerals with high content and hair and tufted convex. On this basis, the effect of methanol, slippery water and N ₂ injection on water lock damage was evaluated. It is proved that N ₂ unlocking effect is the best, permeability can be restored to about 30% of the original, methanol injection unlocking effect is better than sliver water, and the best amount of alcohol injection is 0.4 PV.

According to the theory of the spiral groove of the Muijderman,the MATLAB software is used to calculate the spring pressure of the dry gas seal.In this process,the gas film pressure equation is solved and a two-dimensional array about the radius and pressure is obtained. MATLAB curve fitting tool was used to fit the equation of radius and pressure.Combined with the classic example, the root pressure and the opening force of the spiral groove are calculated, and the relative error is compared with the literature, which verifies the reliability of inference calculation.The spring pressure of the working condition is obtained, which provides the basis for the design of the spring pressure and the maintenance of the spring.

The ability of compound systerm driving residual oil after water flooding, with its relative mechnisms, was analyzed by conducting ASP flooding and alkali-free SP flooding in micro-model experiment. The result shows that, compared with water, high viscoelasticity and low IFT make both ASP and SP compound systerm reduce the amount of residual oil with various type significantly, such as the blind end one, the cluster one and the columnar one by draging the oil droplets into oil thread, peeling oil film, emulsifying oil, etc; fixing water flooding recovery about 50%, the ultra recovery of ASP and SP systerm could reach 81.2% and 85.1% respectively, both higher than water about 30 percent; with the same viscosity, the improved-recovery by alkali-free systerm is higher than the ASP systerm, so non-alkali compound flooding is with great application prospect.

Due to the difference of crystallization temperature and enthalpy for free water and interfacial water during the course of cooling, a series of water-in-oil emulsions were studied experimentally by means of differential scanning calorimetry (DSC). The free water and interfacial water and to measure the time-dependent changes were characterized. From the result can only find one exothermic peak corresponding to the interfacial water at about -40 ℃ when the solubilized water mass fraction 15%. By increasing the amount of the solubilized water to 15%, a new significant exothermic peak is present (at -18 ℃) which is attributed to free water. Both the crystallization temperature of free water and interfacial water are affected by the concentration of solubilized water weekly. The stabilization of the 30%W/O emulsion is decreased with the increase of time placed, and the concentration of interfacial water is also reduced. The peak for the crystallization of interfacial water can not found in the DSC thermogram for the sample prepared over 8 days, and the area of the exothermic peak for the free water crystallization is increased apparently. The change for DSC thermogram indicates that the stabilization of 30%W/O emulsion is destroyed absolutely. 