胶结型强封堵防塌剂的研制与性能评价  

Development and Performance Evaluation of Strong Plugging and Anti-collapse Agent with Cementation Type

作　　者：余加水 尤志良 付超胜 敖天 蒋官澄[3] 谢春林 孔德昌 YU Jiashui;YOU Zhiliang;FU Chaosheng;AO Tian;JIANG Guancheng;XIE Chunlin;KONG Dechang(Drilling Fluid Branch of Western Drilling Engineering Company Ltd,PetroChina,Karamay,Xinjiang 834000,P R of China;Dagang Oilfield Research Institute of Petroleum Engineering,PetroChina,Tianjin 300280,P R of China;State Key Laboratory of Petroleum Resources and Prospecting,Key Laboratory of Petroleum Engineering(Ministry of Education),China University of Petroleum,Beijing 102249,P R of China)

机构地区：[1]中国石油西部钻探工程有限公司钻井液分公司,新疆克拉玛依834000 [2]中国石油大港油田石油工程研究院,天津300280 [3]油气资源与探测国家重点实验室(中国石油大学(北京)),石油工程教育部重点实验室(中国石油大学(北京)),北京102249

出　　处：《油田化学》2020年第4期571-574,580,共5页Oilfield Chemistry

基　　金：中国石油西部钻探工程有限公司钻井液分公司项目“油基钻井液用封堵防塌剂(XZ-OSD)委托研发服务”(项目编号HX20200871);中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项“玛南上乌尔禾组钻井提速基础理论与关键技术研究”(项目编号ZLZX2020-01)。

摘　　要：为改善准噶尔盆地南缘地区破碎性地层引起的钻井过程中井壁失稳及井漏问题,结合仿生强封堵理论,通过模仿贝壳的多层复合结构,研制了一种油基钻井液胶结型强封堵防塌剂XZ-OSD。通过扫描电镜和红外光谱表征了XZ-OSD的结构,评价了其热稳定性、降滤失效果和封堵性,并分析了封堵机理。结果表明,XZ-OSD的球状颗粒尺寸为50~200 nm。XZ-OSD的热稳定性较好,分解温度为250℃。XZ-OSD的降滤失效果显著,在基浆中仅加入1%XZ-OSD,油基钻井液API滤失量降低72.22%,150℃高温高压滤失量降低81.43%。XZ-OSD保护油气层效果显著,在堵漏浆中加入1%XZ-OSD后,岩心的正向封堵率和反向封堵率分别提高2.89倍和0.4倍。XZ-OSD高温封堵效果良好,在堵漏浆中加入6%XZ-OSD,180℃热滚16 h后的滤失量仅为2 mL。XZ-OSD在进入地层后,能进入不同尺寸孔隙、裂缝,通过桥塞和架桥作用封堵孔隙、裂缝,同时遇油膨胀,通过膨胀性能和XZ-OSD的胶结能力保证漏层承压能力,进而提高井筒稳定性,避免井漏等井下复杂事故发生。图3表2参11。In order to improve the problems of wellbore instability and lost circulation caused by fractured strata in the southern margin of Junggar Basin,a cementing strong plugging and anti-collapse agent XZ-OSD was developed by imitating the multilayer composite structure of shell and combining the bionic strong plugging theory.The structure of XZ-OSD was characterized by SEM and IR,its thermal stability,fluid loss reduction effect and plugging property were evaluated,and the plugging mechanism was analyzed.The results showed that the spherical particle size of XZ-OSD was 50—200 nm.XZ-OSD had good thermal stability,and the decomposition temperature was 250℃.XZ-OSD had a significant fluid loss reduction effect.When only 1%XZ-OSD was added to the base slurry,the API fluid loss of oil-based drilling fluid was reduced by 72.22%,and the fluid loss at 150℃high temperature and high pressure was reduced by 81.43%.XZ-OSD had a significant effect in protecting oil and gas formation.After 1%XZ-OSD was added to the plugging slurry,the forward plugging rate and reverse plugging rate of the core were increased by 2.89 times and 0.4 times,respectively.XZ-OSD had a good plugging effect at hightemperature.When 6%XZ-OSD was added to the plugging slurry,the fluid loss after heating at 180℃for 16 h was only 2 mL.After entering the formation,XZ-OSD could enter pores and cracks of different sizes,plug the pores and cracks through the bridge plug and bridging.Furthermore,XZ-OSD expanded in contact with oil,the pressure-bearing capacity of leakage layer was enhanced through the expansion property and the cementing ability,thereby improving the stability of wellbore,and avoiding the occurrence of complicated down-hole accidents such as lost circulation.

关 键 词：井漏 封堵剂 胶结型 承压堵漏 准噶尔盆地 

分 类 号：TE254.4[石油与天然气工程—油气井工程]