【摘要】 LZ地区储层为低孔、低渗致密砂岩储层,裂缝控制了储层的储渗空间和井的产能。通过对LZ地区的构造特征及演化分析,并结合野外露头资料对裂缝产状进行分期配套,认为该区主要发育横张缝、剪切缝以及断层伴生缝和派生缝等构造成因裂缝。针对以上3种构造裂缝类型,分别采用构造曲率法、古构造应力场有限元模拟法、地震不连续性检测法等对该区不同类型裂缝的分布进行了预测,并采用权重评价方法综合这3种预测成果进行裂缝的综合预测,即建立各预测方法的准确率与其影响因子之间的回归函数,再根据预测方法的准确率确定权重系数,将不同方法的预测成果进行综合权重计算,从而对研究区致密储层的裂缝发育情况进行综合预测,经钻井资料证实其预测效果较好。更多还原

【Abstract】 The reservoir in LZ area is tight sandstone reservoir,and fractures control the reservoir spaces and well capacity.Based on the analysis of structural features and evolution,combined with the fracture divided period coordination on the basis of outcrop data,the tectonic origin of fractures is analyzed.It is considered that the fractures developed in the study area mainly are shear fracture,tensional fracture,associated and derived fractures with faults.The constructional curvature method,paleotectonic stress field finite element modeling method and seismic discontinuity detection method are applied to predict the different fractures respectively.The weight is adopted to evaluate the prediction results.It is to establish the regression function between the accuracy of the prediction method and its influencing factors,and then define the weight coefficient through the prediction accuracy and calculate the weights of the different prediction results.Finally it can be used to predict the fracture development in tight sandstone reservoir in the study area.The well drilling data prove the good prediction effects.更多还原