Geophysical prediction of stress and stress desserts in unconventional reservoirs: an example in Bonan area
Liu Jianwei1,2, Zhang Yunyin1, Zeng Lianbo2, Gao Qiuju1, Geng Xue1
1. Geophysical Research Institute, Shengli Oilfield Branch Co., SINOPEC, Dongying, Shandong 257000, China;
2. School of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
Abstract：Unconventional reservoirs are very developed in Es3 of Bonan area, so geostress and stress dessert prediction is a key for the exploration and evaluation of this kind of reservoirs. We propose an ideal in this paper, which is combined with the previous research results to predict stress and stress desserts. The relationship can be established among rock-physical information from well logging data, stress data and seismic data through the analysis of rock mechanics parameters. Stress and Stress desserts can be predicted by inversion and multi-data calculation. Our researches show that the central and southern parts in Bonan are advantage areas for oil and gas accumulation. Type I and type II stress desserts are the main development zones of the mud-fractures, and they have the capacity of shale oil production. The proposed method has been verified by measured stress data and drilling results for unconventional oil reservoir exploration.
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