Honggang Oil Field Shallow Gas Reservoir Description And Evaluation

In the main objective is to present the development of Jilin oilfield Honggang oil field layer of Mingshui formation gas reservoir and Heidimiao oil reservoir. However, because the reservoir has complex relationship, there are many restricted development of gas reservoir problems need to be solved, such as the Sifangtai group was drilled lower Heidimiao oil layer with sporadic show of oil and gas, the gas pool scale and the controlling factors of hydrocarbon accumulation are not in-depth study, is still in the primary stage of pending a comprehensive study.Overview of the research area geology combined with the data of sedimentary background of region, reference and on sedimentary facies study, through the stratigraphic division and correlation in detail, using gas testing, production data, combined with logging interpretation results, to determine the Mingshui formation, Sifangtai formation and Heidimiao oil layer group gas reservoir lower limit standard, and the fluid the nature and the reservoir characteristics are studied, using the effective thickness division standard, the study area of each layer to layer gas bearing area were delineated, the Sifangtai group and HO sand group of reserves calculation, and completed other objective layer reserves review. Research results obtained are as follows:1.the stratigraphic division and correlation, the marker recognition, are small layers of Mingshui formation, with the Sifangtai group, Heidimiao formation sand group, the Ho sand sets before stratification of hierarchical system.2.According to the actual situation of Sifangtai group2lack of core data, the sedimentary facies are considered in the process of determining the characteristics of the sedimentary background, lithology, logging, orderly considering rules facies change and sedimentary facies in the space development, research to determine the Sifangtai group membership in the delta facies delta plain subfacies, mainly distributary channel, natural levee, interchannel microfacies.3.Data of3reference regional sedimentary background and sedimentary facies of the study area, combined with the existing core data, establish the standard microfacies columnar section, through various geological reservoir sedimentary characteristics in the logging information on the specific reflect, established the electrofacies model. Understand the characteristics of sedimentary microfacies, area within each sublayer sedimentary microfacies distribution, drawn the sedimentary microfacies of planar graphs.4.Use the gas testing, production data, combined with logging interpretation results, to determine the Mingshui formation, Sifangtai formation and Heidimiao oil layer group gas reservoir lower limit, the distribution characteristics of gas reservoir.5.By volumetric method of Sifangtai group and HO sand formation of natural gas geological reserves calculation. According to Nii, of Mingshui formation and di Miao formation in H Ⅰ H Ⅱ sand group, natural gas geological reserves were modified.