Algae Beach Dolomite Reservoir Prediction in Sichuan Basin, China

The algae beach dolomite reservoir, with great exploration potential, is widespread developed in the study area, which is located in the northwest of Sichuan Basin. The reservoir of Triassic Leikoupo formation is strong heterogeneity, and the lateral distribution is discontinuous. Meanwhile, the seismic response characteristics are not absolutely clear, sonic logging shows no obvious difference between reservoir and non-reservoir, which is increase the prediction difficulty. Therefore, we utilize a series of methods, such as seismic modeling, high resolution waveform indication inversion and spectral decomposition hydrocarbon detection methods, to predict the reservoir. Firstly we establish multi-wells model to obtain the seismic response features of algae beach reservoir that is weak peak amplitude reflection. Then we operate high resolution waveform indication inversion, investigates unique features from both seismic waveforms and logs unlike geostatistics based on variogram, to predict the range of reservoir. At the same time, we use spectral decomposition methods to detect gas-bearing reservoir. Finally, we integrate the prediction results to comprehensively evaluate the favorable zone of the Leikoupo formation algae beach reservoir and conduct 3 design wells. In this way, we have a basic understanding of the development of algae beach dolomite reservoir in this region.