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时间:2019-05-11
《低渗气藏多层合采可行性分析及产量预测研究》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31卷增刊1石油钻采工艺Vo1.31Sup.12009年6月OILDRILLING8LPRoDUCTIONTECHNOLOGYJune2009文章编号:1000—7393(2009)S1—0079—05低渗气藏多层合采可行性分析及产量预测研究王都伟王楚峰。孟尚志。及德全(1.中国地质大学,北京100083;2.中国石油大学,北京102249;3.中联煤层气有限责任公司,北京1000114.华北油田公司第一采油厂,河北任丘062552)摘要:针对气藏多层开采的特点,利用压力平衡原理计算和绘制各个气层和气井的流入动态
2、曲线,建立一套以时间为变量的气藏多层节点分析方法,形成多节点协调分析的多层合采可行性分析与产量预测研究方法,利用该方法可对气井生产全过程和气层产能及压力变化进行准确的描述与预测。研究分析表明:气层间压力差异是影响合采可行与否的主要因素,气层物性变差和提高气井产量可降低倒灌气量,而增加单层控制储量会延长倒灌发生的时间。当倒灌气量相当大时,合适的井下节流器能够大大降低层间倒灌气量,从而实现多层正常合采。多层合采预测方法经现场实例分析,证实其计算结果与实际生产情况吻合,可靠性较高,适宜指导现场生产。关键词:低渗气藏;多层
3、合采;可行性;产量预测;倒灌中图分类号:TE355文献标识码:AStudyonfeasibilityandproductionforecastofmultiple—zonecommingledproductioninlowpermeabilitygasreservoirWANGDuwei~,WANGChufeng。,MENGShangzhi。,jIDequan(1.ChinaUniversityofGeoSciences,Beijing100083,China;2.ChinaUniversityofPetroleu
4、m,Beijing102249,China3.ChinaUnitedCoalbedMethaneCo·,Ltd·,Beijingi00011,China;4.N0.1(ZProdUCti0Plant,HuabeiOilfieldCornpanv,Renqiu062552,(ina)Abstract:AimingatcharacteristicsofMultiple—zonecomminggledproduction(MZCP),theinflowperformancecurvesofeachformationand
5、gaswellarecomputedandprotractedbypressureequilibriumprinciple.Amultiple—zonenodalanalyticalmethodhasbeenestablishedbytakingtimeasvariable.TheapproachtothefeasibilityandproductionforecastofMZCPisformed.Themethodandapproachcandescribeandforecastthevariationofthe
6、productivityandpressurebetweendifferentformationsofgaswel1.AnalysisofthefactorsofMZCPrevealedtwopoints:Firstly,pressuredifferencebetweenformationsistheprincipalelementforfeasibilityofcommingledproduction,anditcanreduceinverseflowrate.Deteriorationofphysicalpro
7、pertiesofformationsandincreaseofgaswellproductioncanreducethegasflowbackward.Increaseofmonolayercontrolreservecanprolongthetimeofinverseflow.Secondly,whentheinverseflowrateistoohigh,suitabledownholeflowcontrol—letcangreatlyreducetheinverseflowrateandMZCPcanbeu
8、sed.Fieldapplicationindicatesthatthecomputationresultsofthemethodagreewiththeactualproductiondata.Themethodishighlyreliableandcanbeemployedtoguideon—siteproduc—tion.Keywords:lowper
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