欢迎来到天天文库
浏览记录
ID:28024367
大小:517.71 KB
页数:10页
时间:2018-12-07
《大庆油田-海拉尔强水敏含凝灰质储层压裂增产技术》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、海拉尔强水敏含凝灰质储层压裂増产技术谢朝阳张浩唐鹏飞韩松(大庆油田采油工程研宂院,黑龙江大庆163453)内容摘要:近年来,随着海拉尔盆地勘探工作的深入,发现了不同程度含有凝灰质成份的兴安岭群储层。强水敏的含凝灰质岩石具有强吸水性,且遇水易产生膨胀、分散和运移,失去稳定性,以往较为成熟的水基压裂液体系不能适应储层改造的需要,严重影晌了增产效果。海拉尔强水敏兴安岭群储层压裂增产技术研究成功了水包油型冻胶乳化压裂液体系,该体系具有与储层岩石配伍性好、低滤失、低基质渗透率损害率、良好的剪切稳定性、温度稳定性和较强的悬带支撑剂的能力;可
2、保证从配液、运输到施工全过程的乳化性和破乳性要求,对地层不产生乳化伤害;施工结束后,在油层温度下破胶彻底,利于破胶液返排,有利于降低压裂液对油层的伤害程度,可适应40~90°C储层改造。含凝灰质兴安岭群储层压裂优化设计方法研究中,以对储层的地质认识和测井资料分析为基础,结合乳化压裂液特点和相邻井压裂的施工数据,采用FracproPT软件完成参数优化设计。其特点是结合了地应力剖面资料进行裂缝高度预测,设计中可以充分考虑施工净压力的控制,提高压裂成功率。现场施工中采用"梯形"加砂、快速提砂比、保持井底净压力等技术措施,提高改造强度。
3、累计施工66口井163层,平均砂比达27.1%,加砂强度达2.2nWm压裂液效率达47.5%,压裂施工成功率达97%。关键词:凝灰岩;强水敏;乳化压裂液;岩石稳定性;滤失性researchonstronglywatersensitiveXing-an-linglayersfracturingtechnologyXieChaoyangZhangHaoTangPengfeiHanSong(PRODUCTIONENGINEERING&RESEARCHINSTITUTEOFDAQINGOILFIELDCO"LTD,DAQINGHEILO
4、NGJIANG163453)Abstract:Inrecentyears,withthedeepeningexplorationofHai-la-erbasin,itisfoundthatXing-an-linglayercontainstuffinvariousdegree.Stronglywatersensitiverockthatcontainstuffhasstrongwaterabsorbingcapability,itwillswell,disperse,andmigratewhenitcontactswater.I
5、nthiscase,conventionalwater-basefracturingfluidcan’tmeettheneedofformationreconstructionandinfluenceswellstimulationresultsseriously.SoresearchonstronglywatersensitiveXing-an-linglayersfracturingtechnologywasconductedando/wemulsionfracturingfluidwasdeveloped,whichhas
6、goodcompatibilitywithformation,lowleak-off,lowmatrixdamage,andgoodshearstability,temperaturestabilityandrelativelybetterproppantcarryingability.Afterfieldoperation,fracturingfluidbreakscompletelyatformationtemperatureandcanflowbackeasily,whichdecreasesinjurytopayzone
7、.Thisfracturingfluidcanbeappliedtolayersof40°C-90°C.Accordingtoformationgeology,welllogginganalysis,featuresofemulsionfracturingfluidandoperationdataofneighboringwells,optimizationdesignwasperformedwiththeaidofFracproPTsoftware.Itcanpredictfractureheightandcontrolope
8、rationnetpressuretoimprovethefracturesuccessratio.Infieldapplication,techniquesofladder-shapedsandadding,fastsandcontentincreaseand
此文档下载收益归作者所有