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时间:2020-04-18
《海上异常高压气藏应力敏感特征及产能方程——以莺歌海盆地为例-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第9期开发工程·59·海上异吊-古同压气藏应力敏感特征及产能方程以莺歌海盆地为例温伟明朱绍鹏李茂中海石油(中国)有限公司湛江分公司温伟明等.海上异常高压气藏应力敏感特征及产能方程——以莺歌海盆地为例.天然气工业,2014,34(9):5963.摘要目前国内外推导的异常高压气藏考虑应力敏感效应的产能方程中混淆了有效应力与生产压差的概念。为此,在前人研究的基础上,通过对实验和产能测试资料的分析,探讨了应力敏感对储层物性和气井产量的影响问题,并基于修正的应力敏感方程,结合气藏渗流特征,重新建立了符
2、合油气藏地质特征的新的二项式气井产能方程,从理论上阐述了莺歌海盆地异常高压气藏产能特征,并用实际测试资料检验了该方程的实效性。结果表明,莺歌海盆地异常高压气藏开发中不应忽视应力敏感效应,在同一储层特征条件下,应力敏感效应特征越显著,开发过程中表现出的应力敏感效应越严重,气井产能损失就越大。因此,在异常高压气藏生产管理中,应采取合理的开发技术手段和工作制度,防止井筒附近地层压力迅速下降导致储层渗透能力及气井产能的下降。所取得的成果、认识可推广应用于其他类似探区。关键词异常高压气藏应力敏感产能方程上覆压
3、力二项式推导莺歌海盆地DOI:10.3787/j.issn.1000—0976.2014.09.009Stresssensitivityfeaturesandproductivityequationsofoffshoreabnormalhigh—pressuregasreservoirs:AcasestudyfromtheYinggehaiBasinWenWeiming.ZhuShaopeng。LiMao(CN00CZhanjiangBranch,Zhanjiang,Guangdong524057,
4、China)NATUR.GASIND.VOLUME34,ISSUE9,PP.59—63,9/25/2014.(ISSN1000—0976;InChinese)Abstract:Atpresentscholarsoftenmixuptheconceptsofeffectivestressanddrawdownpressure,especiallywhenthestress—sensi—tiveproductivityequationsforthoseoverpressuregasreservoirsa
5、reapplied.Basedonthepreviousstudiesanddataanalysisonthestresssensitiveexperimentsandproductiontests,theeffectsofstresssensitivityonreservoirphysicalpropertiesandgaswellpro—ductionarediscussed.Furthermore,anewbinomialequationofgas—wellproductivitysuitab
6、leforthegeologicalfeaturesofahydro—carbonreservoirisreformulatedonthebasisoftheamendedstresssensitivityequationandthepercolationcharacteristicsofagasreservoir.Thenewbinomialequationtheoreticallyindicatestheproductivityfeaturesofabnormalhigh—pressuregas
7、reservoirsintheYinggehaiBasin,anditseffectivenessisvalidatedthroughactualtestdata.TheresultsshowthatthestresssensitivityeffectshouldneverbeignoredinthedevelopmentofabnormalhighpressuregasreservoirsintheYinggehaiBasin;themoreobviousthestresssensitivityo
8、nthesamegasreservoir,thegreaterthestresssensitivityeffectduringthedevelopmentandthegreaterlossingaswellproductivity.Therefore,areasonableworkingsystemanddevelopmenttechnologymeansshouldbeimplementedtOmanagethepro—ductionofabnormalhigh—。
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