砂砾岩物理相破裂压力及裂缝扩展规律  

FRACTURE PRESSURE AND FRACTURE PROPAGATION MECHANISM OF THE PETROPHYSICAL FACIES OF GLUTENITE

作　　者：郭先敏[1] 邓金根[2] 陈宇[2] 

机构地区：[1]胜利油田分公司钻井工艺研究院,山东东营257017 [2]中国石油大学石油天然气工程学院,北京102249

出　　处：《大庆石油地质与开发》2011年第5期109-112,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：胜利油田沙四段砂砾岩体主要含4类物理相，需要确定压裂过程中各类物理相的破裂顺序。利用实际的取心岩心制作了人造岩心物模，通过系统进行了水力压裂模拟实验，研究了4类物理相在压裂过程中的破裂顺序和裂缝扩展规律。定性分析结果表明：胶结程度、孔隙结构是影响砂砾岩体物理相破裂压力高低的主要因素，而砂砾岩体物理相的砾石含量、粒径大小和天然裂缝的存在是裂缝扩展的重要因素。实验结论为砂砾岩体的勘探开发提供了依据。The glutenites of Sha-Ⅳ Member in Shengli Oilfield mainly contain four types of petrophysical facies, therefore it needs determining the fracturing sequence of these petrophysical facies during the fracturing process. An artificial core model is made by the actual sampled cores, and a simulated experiment of hydraulic fracturing is con- ducted through this system, finally, the fracturing sequence and fracture propagation rules of these four types of petrophysical facies are investigated. The qualitative analysis shows that： cementation degree and pore structure are major factors that influence the fracture pressure of glutenites petrophysical facies. Moreover, gravel concentration, particle size and the existence of natural fracture in glutenite petrophysical facies are the important factors that influ- ence fracture propagation. The experimental result provides evidences for the exploration and development of gluten7 ite reservoirs.

关 键 词：砂砾岩 物理相 真三轴实验 破裂压力 裂缝扩展 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]