High-precision Prediction of Thin Sandstones in Dujiatai Oil Layer of Shuguang Area

doi:10.3969/j.issn.1006-6535.2020.06.013

Abstract

Abstract: In order to solve the problem that it is difficult to predict the thin sandstones in the fan delta front facies of Dujiatai oil layer of Shuguang Area, the high-precision prediction of thin sandstones was carried out by using seismic waveform indication simulation technology. The results show that the accuracy of identifying thin sandstones by self-potential (SP) from seismic waveform indication simulations can reach 3.0-8.0 m and the inversion coincidence rate can reach 81.5%; the distribution characteristics of thin sandstones in the fan delta front facies of the Du 2 Member in Shuguang Area are clarified. Three thin sandstone development areas of fan delta front mouth bar and sheet sand microfacies (Du 130-Du 144, Du 300-Shu 100, Shu 66-Shugu 19-Shu 175 well areas) are identified, with a total area of 26.0 km². The research results have guided the deployment of two exploration wells, both obtaining industrial oil and gas flow, which laid the foundation for further improvement of reserves and productivity in Shuguang Area. The seismic waveform indication simulation technology is of great significance for thin sandstone prediction and lithologic reservoir exploration in Shuguang Area.

Key words: seismic inversion, prediction of thin sandstone, waveform indication simulation, fan delta front, Shuguang Area, Dujiatai oil layer

CLC Number:

TE122

Chen Chang, Jin Ke, Lei Wenwen, Wang Heng, Guo Feng, Qian Lixin, Qin Xichun. High-precision Prediction of Thin Sandstones in Dujiatai Oil Layer of Shuguang Area[J]. Special Oil & Gas Reservoirs, 2020, 27(6): 96-101.

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