黄龙场构造长兴组裂缝预测

四川盆地黄龙场构造长兴组主要为生物礁储层， 裂缝是影响单井产量的主要因素。通过分析研究区构造成因及动力来源， 总结了研究区构造形成模式。结合石油地质学、 构造地质学、 岩石力学和各种生产资料， 利用古构造应力场二维数值模拟， 对研究区岩体的破裂程度进行预测， 然后计算出研究区岩体的破裂接近程度， 确定岩体破裂程度与裂缝发育的关系， 确定裂缝发育级别， 对裂缝发育程度、 裂缝类型和产状进行综合预测。得到了黄龙场地区早晚期主应力的矢量方向， 并把裂缝发育分为 2 期、 4 级和 6 类。

Fracture Prediction of Changxing Formation in Huanglongchang Structure

ReefreservoiristhemainreservoirtypeofChangxingFormationinHuanglongStructure， butthedynamicdata analysis suggests that different production wells vary dramatically in productivity. Research shows that theproductionofsinglewellismainlyaffectedbyfractures. Therefore， predictionsonfracturesofChangxingFormationin Huanglong Structure can better guide well pattern and development. By analyzing the tectonic origin and powersource of the study area， this paper builds up the structure formation models of the study area. By combiningpetroleum geology， structural geology， rock mechanics and a variety of production materials and by applying two-dimensional numerical simulation of paleo-tectonic stress field， the cracking degree of the rock mass is predicted.Then the failure approach index is calculated and the relation between fracture development and the cracking degreeoftherockmassisdefined， whichhelpstodeterminethedevelopmentlevelsoffracturesandmakesacomprehensiveprediction of fracture development， fracture types and attitude. Vector direction of principal stress in early and latestages in Huanglong Chang classifies the fracture development into 2 stages， 4 grades and 6 categories.