| 摘要: |
| 为减少低压地层的井漏问题,室内将优选出的高效起泡剂与稳泡剂、抑制剂、降失水剂、井
壁稳定剂等进行配伍,形成了微泡沫钻井液。在微观结构研究中,微泡沫显示了独特的多层膜结构特
征,膜强度高,微泡沫在钻井液中分布均匀,可以有效降低钻井液的密度。室内对微泡沫钻井液性能的
研究表明,微泡沫钻井液密度低,可以适应高温高压的地层条件,抑制性强,可较大幅度地提高油气层保
护效果。在三塘湖油田的应用表明,微泡沫钻井液适用于封堵低压漏失地层,且现场配制简单、易于转
化、维护方便,钻井液性能稳定,能够满足钻井工艺的要求,泥浆泵上水正常,应用井段钻井液密度降低
到0.95g/cm3 以下,防止了井漏情况发生,减轻了油气层污染,保证了钻井工作的顺利进行。 |
| 关键词: 钻井液 微泡沫 油层保护 防漏 |
| DOI：10.3969/j.issn.1007-3426.2016.04.011 |
| 分类号: |
| 文献标识码:A |
| 基金项目: |
|
| Researchandapplicationofleakprevetionmicro-foamdrillingfluidinSantanghuoilfield |
|
FangYanwei, YangJiawei, MaYuliang, WangXianguo, ZhaoZhiqiang
|
|
CNPCXibuDrillingEngineeringCompanyLimited,Shanshan838200,China
|
| Abstract: |
| Tosolvetheproblemofwellleakageinlowpressurereserve,acirculativemicro-foam
drillingfluidwasdevelopedbycombininghigheffectivefoamagentwithfoamstabilizer,inhibitor,
filtratereducerandboreholestabilizer.Theuniquemultilayerfilmstructureofmicro-foamismadeup
ofonenucleusandtwolayersandthreelayersfilm,andthemicro-foamhasahighfilmstrengthand
canbeuniformlydispersedindrillingfluid,whichcanefficientlyreducethedensityofdrillingfluid.
Theperformanceevaluationindoorsshowsthatthedensityofdrillingfluidislow,anditisfitfor
HTHPformation,therejectioncapabilityofdrillingfluidisstrong,whichcaneffectivelyenhance
reserveprotectioneffect.TheapplicationsinSantanghuoilfielddemonstratethatthe micro-foam
drillingfluidissuitableforpluggingthelow-pressurecirculation-lostzones.Thedrillingfluidiseasy
toprepare,transformandmaintaininfieldapplication.Thepropertyofdrillingfluidisstable,which
canmeettherequirementofdrillingprocess,andthemudpumpworksasnormal.Thedrillingfluid
densityislessthan0.95g/cm3,whichpreventsthewellleakageandreducesthereservepollution.It
isapprovedthatthemicro-foamdrillingfluidishelpfulfordrillingsafetyandquality. |
| Key words: drillingfluid,micro-foam,reserveprotection,leakprevention |
