断层容量维、信息维与数值模拟预测裂缝对比  

Comparisons of Fault Capacity Dimension and Information Dimension with Numerical Simulation in Fracture Prediction

作　　者：刘敬寿 戴俊生 王硕 张祥成 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266555

出　　处：《新疆石油地质》2015年第2期222-227,共6页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05042-001)

摘　　要：针对闵桥油田构造起伏简单、断层发育的实际情况,利用断层容量维法、断层信息维法对闵桥油田储集层构造裂缝分布进行预测,并将预测结果与应力场数值模拟结果进行了对比。结果表明,闵桥油田有3个裂缝发育区;利用断层信息维法预测的裂缝分布趋势与数值模拟法结果基本一致,断层的活动性与断层宽度呈相关关系,断层信息维在一定程度上反映了断层活动的强弱,克服了简单容量维在表征裂缝分布规律的不足;断层宽度和断层间距是影响裂缝发育的重要因素;断层的分形特征具有尺度性,在多期裂缝叠合区,断层分形预测裂缝具有优势,而数值模拟预测的精度较低;多种方法结合互补,可以准确预测储集层构造裂缝的分布。According to the fact that Minqiao oilfield is of simple structure and more faults, the fracture distribution in its reservoir is pre- dicted by means of fault capacity dimension and information dimension method, the prediction result is compared with the result of numeri- cal simulation of structural stress field. The result shows that Minqiao oilfield has three fracture developing areas, and the fracture＇s distri- bution trends predicted by fracture information dimension method and numerical simulation method are basically consistent. The fault ac- tivity is linearly proportion to fault width, the fault＇s area information entropy reflects the fault activity in a certain extent, and overcomes the shortage of simple capacity dimension in characterization of fracture distribution. The fault width and spacing are essential factors that influence the fracture development. The fractal characteristics of the fault is of scale and the accuracy predicted by using fractal method is much lower than that by numerical simulation of structure stress field, specially in prediction of the local distribution of fractures. The nu- merical simulation is not accurate in predicting multistage fracture superimposition area.

关 键 词：苏北盆地 闵桥油田 分形几何 信息维 容量维 裂缝预测 应力场 数值模拟 

分 类 号：TE112.23[石油与天然气工程—油气勘探]