The Research Of Corrosion In YuLin Gas Field

In this paper, core observation, analysis of rock and mineral identification, such as testing data to establish the phase sequence of the study area section, and further through the vertical and horizontal profile comparison and tracking to determine the study area, Hill2, and the deposition of the sedimentary facies sedimentary microfacies distribution range their characteristics.Interpretation of logging data and logging the results of the study area on Layer2mountain property characteristics, the characteristics of heterogeneity, depicting sand distribution patterns. The results show that:1. Sand distribution as a distributary channel control channel from the channel center to the wings of sand clay content increased, the thickness gradually thinner, gas saturation, permeability and porosity decreased.2. Hill2Hill reservoir rock types from the21-Hill23change.21lithic quartz sandstone mountains; Hill22for the quartz sandstone, lithic quartz sandstone of individual samples; Hill23for the quartz sandstone.23of21from the mountains to the mountains average quartz content increased.3. Hill21-Hill23debris sorting and roundness gradually changed for the better, corrosion phenomenon became clear. Overall, Hill2the reservoir particle separation medium-mainly poor, sub-angular-sub rounded, angular seq mainly as point particles and more-linear, line-linear contact, contact with a few sutures.4. Mountain23small layer of intergranular dissolution porosity and clay dissolved pore, followed by intergranular pores and intragranular dissolved pores, faces a maximum rate of15%, an average of9.56%; Hill22, a small layer between grains dissolution porosity and clay dissolved pore, Maximum porosity of12%, average7.56%; Hill21small layer to crack and most developed porous clay, faces a maximum rate of6%, with an average of2.79%.5. Mountain25.4%average porosity, distribution of frequencies mainly below10%, can account for more than90%; the average penetration rate of4.012×10-3μm2, less than1×10-3μm2accounted for59.69%of samples, and showed bimodal characteristics.