欢迎来到天天文库
浏览记录
ID:5294798
大小:258.53 KB
页数:6页
时间:2017-12-07
《利用套管变形测井资料反演储层应力场》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第26卷第4期岩石力学与工程学报Vol.26No.42007年4月ChineseJournalofRockMechanicsandEngineeringApril,2007利用套管变形测井资料反演储层应力场121333陈朝伟,殷有泉,蔡永恩,刘继生,吕秀梅,裴建亚(1.北京大学地球物理学系,北京100871;2.北京大学力学与工程科学系,北京100871;3.大庆油田有限现任公司测试技术服务公司,黑龙江大庆163153)摘要:利用套管变形资料估算测点地应力和反演储层应力场。首先,根据API标准确定套管挤毁压力,并根据地应力
2、和挤毁压力的关系确定测点的均匀地应力或平均地应力。通过对套管和地层系统进行弹性分析,给出柔度比、位移比和应力比的关系;由套管变形资料给出位移比,而柔度比是由系统本身决定的,由此确定应力比;再结合平均地应力,估算测点的非均匀地应力。其次,以得到的测点地应力作为基础资料,利用有限元和最小二乘法外推储层区域应力场。最后,利用大庆葡北储层二断块的套管变形资料研究该区域的三维应力场,为分析该区域套管损坏提供判断依据。该方法为缺乏实测地应力资料的区域提供反演储层应力场的新途径。关键词:石油工程;有限元;地应力场;反演;测井资料;套管变
3、形中图分类号:TE35文献标识码:A文章编号:1000–6915(2007)04–0734–06BACKANALYSISOFRESERVOIRSTRESSFIELDWITHLOGGINGDATAOFCASINGDEFORMATION121333CHENZhaowei,YINYouquan,CAIYong′en,LIUJisheng,LUXiumei,PEIJianya(1.DepartmentofGeophysics,PekingUniversity,Beijing100871,China;2.DepartmentofMe
4、chanicsandEngineeringSciences,PekingUniversity,Beijing100871,China;3.LoggingandTestingServicesCompany,DaqingOilfieldCo.Ltd.,Daqing,Heilongjiang163153,China)Abstract:Anewmethodisproposedwhichisusedtoapproximatelycalculatethein-situstresseswiththeloggingdataofcasing
5、deformationandtoinversethestressfieldofreservoir.Firstly,theuniformoraveragein-situstressesmaybedeterminedonthebasesofthedamagepressurewhichcanbedeterminedbyAPI.Therelationamongflexibilityratio,displacementratioandstressratiomaybedeterminedbyanalyzingoftheelastics
6、ystemwiththecasingandformation.Theflexibilityratiodependsontheelasticityandthegeometrystructureofthesystem.Thedisplacementratioiscalculatedbytheloggingdataofthecasingdeformation.Thestressratiocanbeobtainedbytheflexibilityratioandthedisplacementratio.Therefore,then
7、onuniformin-situstressescanbeobtainedbythestressratioandtheaveragestresses.Secondly,takingthein-situstressesasthefoundationaldata,thefiniteelementandinversemethodareutilizedtocalculatethestressfieldofthereservoir.Finally,themethodisappliedtoDaqingOilfieldprelimina
8、rily.Themethodmakesitpossibletoinversestressfieldintheformationwherethedataofin-situstressmeasuredarescarce.Keywords:petroleumengineering;finiteelements
此文档下载收益归作者所有