欢迎来到天天文库
浏览记录
ID:38272032
大小:1.50 MB
页数:4页
时间:2019-05-24
《多缝压裂新技术研究与试验_唐梅荣》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32卷第2期石油钻采工艺Vol.32No.22010年3月OILDRILLING&PRODUCTIONTECHNOLOGYMar.2010文章编号:1000–7393(2010)02–0071–04多缝压裂新技术研究与试验唐梅荣赵振峰李宪文赵文(长庆油田公司油气工艺研究院,陕西西安710021)摘要:受到注采井网和压裂工艺双重限制,单纯增加缝长来提高超低渗透油藏产量效果已不明显,为此提出了定向射孔多缝压裂技术思路,通过定向射孔诱导定向起裂,迫使初始裂缝转向,最终形成相互独立的多缝,进一步提高油层横向动用程度,扩大泄油面积。通过物模研究,认识到射孔方位和
2、水平应力差是影响多缝形成的关键因素,在此认识上,优化了压裂工艺。华庆地区现场试验2口井,通过净压力拟合和微地震裂缝监测等手段分析,初步证实层内形成了独立多缝。投产初期,试验井相比邻井井均日增油0.91t(增幅约26%),实践证明通过多缝压裂提高泄油面积可以达到增产的目的。关键词:超低渗透油藏;定向射孔;裂缝转向;多裂缝;泄油面积中图分类号:TE357.1文献标识码:AStudyandtestonthenewtechnologyofmulti-fracturefracturingTANGMeirong,ZHAOZhenfeng,LIXianwen,ZHAO
3、Wen(ChangqingOilfieldCompanyOil&GasTechnologyResearchInstitute,NationalEngineeringLaboratoryofTightOil&GasFieldExplorationandDevelopment,Xi'an710021,China)Abstract:Duetotherestrictionoffloodingpatternsandfracturingtechnologies,itisnotdistincttoincreasetheoutputofsuper-lowpermeabi
4、lityreservoirinChangqingOilfieldonlybyincreasingfracturelength.Enlightenedbythefactthatthedirectionalperforatingcanreducethepressureofrockfracturing,thenewtechnologyofdirectionalperforatingandmulti-fracturefracturingisfirstlybroughtforward.Thistechnologyimproveshorizontalproducti
5、vedegreeofoillayerandenlargesthedrainageareathroughdirectionallyper-foratingtoinduceorientedextension,forcinginitialfracturingtochange,andfinallyformingindependentmulti-fracturing.Throughthestudyofentitymodel,itisrecognizedthatperforatingazimuthandhorizontalstressdifferencearethe
6、keyfactorsthataffecttheformationofmultifractures.Basedonthisrecognition,fracturingtechnologyisoptimized.TwowellsweretestedonthespotinHuaqingarea.Itisapprovedinitiallythatindependentmultifracturesisformedinsidelayersthroughtheanalysisonnetpressurematchingandmicroseismicfracmapping
7、.Attheinitialproductionstage,theaveragedailyoilproductionoftrialwellsincreasesby0.91tons(growingrateisabout26%)comparedwiththeadjacentwells.Thispracticeprovesthatproductioncanbeincreasedbyincreasingdrainageareathroughmulti-fracturefracturing.Keywords:super-lowpermeabilityreservoi
8、r;directionalperforating;fracturechange;
此文档下载收益归作者所有