关于滇西南勐野地区绳索取芯钻井液探讨  

Discussion on Coring Drilling Fluid in Mengye Area,Southwest Yunnan

作　　者：乔金波 Qiao Jinbo(No.4 Hydro and Geological Team of China Coal Geology Bureau,Handan,Hebei,056001)

机构地区：[1]中国煤炭地质总局第四水文地质队,河北邯郸056001

出　　处：《中国井矿盐》2022年第4期28-30,共3页China Well and Rock Salt

摘　　要：滇西南勐野井组地层以泥砾碎屑岩、泥砾岩、含砾泥岩、泥砾盐岩为主泥岩,石膏在孔底表现为弹塑性,易发生水化造浆、崩解、膨胀、孔内掉块现象。在绳索取芯钻进工程中因地层造浆性能好,有害固相含量高及饱和氯化镁盐水钻井液护壁性较差,频繁出现内壁结构和孔内坍塌等事故,针对以上问题对钻井液进行相应改进,取得了较好成果。The formation of Mengyejing Formation in southwest Yunnan is mainly composed of clastic mudstone,mud conglomerate,pebbly mudstone and mud and gravel salt rock.The gypsum is elastic-plastic at the bottom of the hole,which is prone to hydration slurry formation,disintegration,expansion and block dropping in the hole.In coring drilling engineering,due to the good performance of formation slurry,high content of harmful solid phase and poor wall protection of saturated magnesium chloride brine drilling fluid,accidents such as wall structure and hole collapse frequently occur.In view of the above problems,the drilling fluid was improved and achieved good results.

关 键 词：钻井液 钻井液配比 泥砾岩 

分 类 号：TS33[轻工技术与工程]