非常规油藏地应力和应力甜点地球物理预测——渤南地区沙三下亚段页岩油藏勘探实例

渤南地区沙三下地层发育非常规油气藏，预测地应力及应力甜点是该类油藏勘探及评价的关键。本文提出的地应力及应力甜点地球物理预测方法结合了前人研究成果，以测井岩石物理参数分析为基础，建立地应力、破裂压力与岩石弹性参数的关系，通过多元线性回归拟合力学计算公式，并以弹性参数反演和多体融合技术为依托，实现了应力场及应力甜点的地震预测。理论研究及钻探结果均表明，渤南洼陷中部及南部的低应力区是油气成藏的优势条带，Ⅰ型和Ⅱ型应力甜点是泥岩裂缝型油藏的主要发育区，且具有页岩油产能。实际应力数据和钻探效果验证了方法的有效性，该方法可为非常规油藏勘探提供参考依据。

Geophysical prediction of stress and stress desserts in unconventional reservoirs: an example in Bonan area

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.