Integrated Sweets Spots Evaluation Technology for Tight Sandstone Gas Reservoirs in Zhongjiang Gas Field

doi:10.11885/j.issn.1674-5086.2022.01.27.03

Abstract

Abstract: The gas reservoir of Shaximiao Formation in Zhongjiang Gas Field has a structural pattern of two depressions surrounded by three uplifts. The three uplift area in the high structure part has been developed efficiently, but the evaluation technology of the channel sweet in spot two depressive structural low areas needs further study. Aiming at the problem that the existing geological sweet spot study focuses on reservoir quality evaluation, but the gas prediction depends on seismic interpretation and has strong multi-solution, the technology of geological sweet spot prediction with higher accuracy is formed by combining reservoir formation and seismic research. Based on the evaluation of geological sweet spots, engineering sweet spots evaluation, which is used to evaluate the adaptability of hydraulic fracturing technology, is conducted firstly. Then, taking on the research of the differential accumulation of deep-source and shallow-gathering secondary gas reservoirs, the integrated sweet spot prediction technology is established by taking both geological sweet spot and engineering sweet spot into consideration. And combining the new fracturing technology, the limit of conventional reservoirs of geological sweet spots can be lower, the rate of gas well can be significantly increased, thereby the two depressive area can be developed effectively. The integrated sweet spot prediction technology can be used to evaluate low quality rivers which is more suitable for the new fracturing technology, so the rivers in lower structural areas and with more poor physical properties can be developed.

Key words: tight sandstone gas reservoir, differentiated accumulation, geological sweet spot, engineering sweet spot, integrated sweet spot

CLC Number:

TE377

LIU Yan. Integrated Sweets Spots Evaluation Technology for Tight Sandstone Gas Reservoirs in Zhongjiang Gas Field[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(3): 12-25.

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