轮南奥陶系裂缝研究的综合定量方法

轮南地区奥陶系裂缝裂储层具有埋藏深，多期构造运动形成，影响因素多，后期改造作用复杂等特点，针对这些特点，建立预测裂缝发育区的综合数学模型，采用数理统计，应力场数值模拟，岩石力学性质分析与构造，沉积，钻井资料相结合的方法，确定裂缝形成进期及相关关系，分析裂缝形式的影响因素，建立不同岩性裂缝概率的计算方法和裂缝预测模型，综合各种影响因素，确定应力场数值模拟的模型参数，计算了四期裂缝发育概率，同时预测了

Integratively quantitative method for fracture analysis of Ordovician system in Lunnan area

Ordovician fractured reservoir in Lunnan area is characterized by big depth,multi-period tectonic movement, many influence factors, very complicated late reforming and so on. Integrative mathematical model for fracture area prediction is constructed to cope with above characteristics, Authors determine fracturing periods and their relation, analyse influence factors for fracturing, develop both computation method for fracture probabilities in different lithologies and fracture prediction model, overall analyse all influence factors to obtain parameters for stress field numerical modeling, compute the probabilities of fracture developments in four periods, and predict the distributions of fractures and effective fractures in each fracturing period, by making mathematical-physical statistics, stress-field numerical modeling, rock mechanics research and combinative analysis of tectonic, sedimentary and drilling data. Computation result coincides with real hydrocarbon test.