地应力场模拟软件研发及应用  

The development and application of situ stress field simulation software

作　　者：赵益忠 魏庆彩 梁伟 陈雪 王东 

机构地区：[1]中石化胜利油田分公司石油工程技术研究院,山东东营257000

出　　处：《重庆文理学院学报（社会科学版）》2015年第5期55-58,共4页Journal of Chongqing University of Arts and Sciences（Social Sciences Edition)

基　　金：山东省博士后创新项目"疏松砂岩储层应力及出砂界限研究"(201203017)

摘　　要：首先，基于定向井井周应力模型建立了单井目标层位地应力计算方法，同时采用平面应变模型作为二维地应力场模拟的基础模型；其次，采用模型语言研发了地应力场模拟所需有限元源程序，采用Newton最速下降法优化地应力场模拟边界载荷加载，引入“宏命令”方法实现了复杂地质模型的自动化构建和网格剖分，在此基础上研发了一款地应力场模拟有限元软件；最后，对胜利桩西老河口油田地应力场进行了建模分析，模拟计算误差为6．1％．研究表明，断层会对应力场产生显著影响，远离断层区域最小水平地应力介于22～23．5MPa，最大水平地应力介于24-26．5MPa，为老河口油田单井地应力纵向剖面建立及压裂防砂优化设计提供了定量依据．Firstly, based on the circumferential stress model of the directional well, the situ stress computa- tional method about target stratigraphic position of the single well was established, using plane strain model as simulation based model of two - dimension situ stress field. Secondly, the model language was used to study and develop the finite element program required by situ stress field simulation, using Newton steepest descent method to optimize the stress field simulation boundary loading and introducing ＂macrocommand＂ method to achieve antomation building and meshing of the complex geological model. On the base, the finite element software about simulation of the ground stress field is researched and developed. Finally, the article established model and analyzed about situ stress field in Laohekou oilfield of Zhuangxi on Shengli block, the simulation calculation corrigendum was the percent of 6.1. The research indicated that fault will have a sig- nificant impact on stress field of reservoirs. The minimum level ground stress away from fault zones is be- tween 22 MPa and 23.5 MPa, the maximum of that is between 24 MPa and 26.5 MPa. It is provided a quantitative basis for next step to establish ground stress vertical secion and design optimization on fracturing sand in single well of this oilfield.

关 键 词：地应力 模拟 有限元软件 断层 

分 类 号：TE319[石油与天然气工程—油气田开发工程]