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- W3178246153 abstract "The gas production capacity difference among single wells and the difficulties in sustaining stable production are the key problems faced by shale gas production areas. Based on the typical characteristics of the shale gas production areas， a technical process for the lithofacies classification of high-quality marine shale affected by the gas production capacity was established in this paper. Firstly， for the high-quality marine shale in the shale gas production area， the main gas production capacity difference control factors were analyzed， and the lithofacies classification scheme was determined. Then， using the developed logging calculation model of total organic carbon （TOC） content， porosity， clay， siliceous， and calcareous mineral content， the single well parameter calculation and the lithofacies identification in one shale gas producing area were completed. A total of 10 types of shale lithofacies were identified in one shale gas production area， and the relationship between shale lithofacies type and gas production capacity difference was revealed by comparing the gas content of each lithofacies. Finally， a three-dimensional （3D） lithofacies model in one shale gas production area was established by using the truncated Gaussian simulation algorithm and the sedimentary microfacies confined lithofacies strategies， the spatial distribution characteristics of each kind of lithofacies were shown， and the gas production capacity difference in the Wufeng-Longmaxi black shale in the study area was revealed. At the same time， according to the two conditions of large volume proportion and great gas potential in 3D space， the three different lithofacies with excellent gas production capacity in the study area were determined as i. rich in carbon， high in porosity， calcium， muddy siliceous shale， ii. rich in both carbon and porosity mixed shale， and iii. high in carbon， medium to high in porosity， calcium， muddy siliceous shale. The above results are helpful for explaining the essential causes for the great difference in the decline amplitude and output effect of shale gas production areas， laying a solid theory foundation and technical support for fine production management in shale gas production areas." @default.
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- W3178246153 date "2021-04-10" @default.
- W3178246153 modified "2023-09-26" @default.
- W3178246153 title "The Lithofacies Classification and Its Influence on the Gas Production Capacity in the Shale Gas Production Area" @default.
- W3178246153 doi "https://doi.org/10.14027/j.issn.1000-0550.2020.132" @default.
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