Linbei area was located in the middle of the central uplift zone of Huimin depression. Aiming at the problems of unclear reservoir type, trap scale and reservoir validity of the Jishan sand body in this area, starting from hydrocarbon source conditions, reservoir physical properties, distribution of sedimentary facies and structural features, through the data of drilling and oil testing results, comprehensive application of geological, geochemical analysis and geophysical research means, in depth analysis of hydrocarbon accumulation conditions and main control factors. The results show that: the high⁃quality source rock in the third member of Shahejie formation is the main source of Linbeijishan sand body, and the good configuration of sand bodies in different periods in time and space is the basis for the formation of hydrocarbon accumulation; the relationships between the developed faults and the pathway system of framework sand body in the area provides a good migration channel for oil and gas, which results in the zonal distribution of oil and gas reservoirs along the North⁃South fault steps; The mudstone in the upper part of the third member of Shahejie formation and the thick mudstone at the top of the Jishan sand body are stable, The sand body of each stage are separated by mudstone and pinched out from the east to the west, the high salinity primary CaCl2 water type with good sealing property developed in the third member of Shahejie formation and the lateral sealing of some faults act together to provided good preservation conditions for oil and gas reservoirs.

Introduces a kind of compound ferrous sulfide cleaner, the principle to use the coordination reaction and oxidation and reduction reaction to the ferrous sulfide removal equipment. Respectively in different complex agent and oxidant ferrous sulfide removal, according to the result of single factor experiments, chose the sodium pyrophosphate and sodium hypochlorite as the main composition of cleaning agent, use the orthogonal experiment to investigate the concentration of sodium hypochlorite, sodium pyrophosphate mass, cleaning time and cleaning temperature effect on the clearance of ferrous sulfide. The experimental results show that when the concentration of sodium hypochlorite is 0.003 mol/L, sodium pyrophosphate mass is 1.5 g, cleaning temperature is 80 ℃ and the time is 12 h, the clearance rate of ferrous sulfide is highest, at 75.0%.

Polymer separation membrane is a kind of functional polymer material used for separation and purification, which has attracted much attention in recent years. Compared with the traditional petroleum based membrane materials, poly(lactic acid) membranes have the advantages of biodegradability and good biocompatibility. As a new type of green environmental protection membrane material， it has a wide range of applications in many fields. In this paper, the research progress of PLA separation membrane at home and abroad is summarized. The methods of preparation, influencing factors of membrane structure and properties, and modification of PLA membrane are mainly elaborated. Finally, the development trend of PLA separation membranes are prospected.

Paraffin wax was blended with F-T wax. The effects of the mass fraction of F-T wax on paraffin 46 ^# and 58 ^# were investigated respectively. The results show that the addition of F-T wax can significantly increase the melting point of paraffin, when the mass fraction of F-T wax increases from 0.05% to 30.00%, the melting point of 46 ^# and 58 ^# blended wax drops from 72.4 ℃ to 44.4 ℃, and drops from 88.4 ℃ to 62.4 ℃, respectively. With the increase of the mass fraction of F-T wax, the melting point and penetration of blended wax decrease continuously, that is, the mass fraction of F-T wax is inversely proportional to the drop melting point and penetration. The analysis of the crystalline structure of the blended wax shows that, the content of non-isoparaffins in the blended wax is higher. So its crystal structure is an array of inclined lattice arrangement of the long needlelike wax crystals, and the natural paraffin crystallization is different with others, which composition is more complex.

 

 

 

The spontaneous combustion of iron sulfides in sour oil tanks is thought to be the main reason to cause fire and explosion accidents in oil tanks. Sulfur hydrogen dissolving in water to form hydro-sulfuric acid reacts with iron to give iron sulfides. The gas of sulfur hydrogen was continuously passed through the water, at a flow rate of 300 mL/min for 6 h, in trigonal beaker contained 8 g iron powder to produce the iron sulfide samples at 25, 50 and 75 ℃ respectively. The deposit was filtered and dried. The reaction product was analyzed by chemical and XRD analysis. The results show the iron sulfide in reaction product is FeS. Air passed through the dry and moist reaction product at a flow rate of 300 mL/min respectively. The experimental results show that all the reaction products are of high spontaneous combustion nature. When sulfuration temperature is increased, the sulfuration reaction rate rose and the spontaneous combustion nature of reaction product are also raised.