南海东部电缆地层测试仪器井下遇卡原因分析与应用  

Cause analysis and application of downhole stuck of cable formation testing instrument in eastern South China Sea

作　　者：周全[1] 王显南 尹璐 吴乐军[1] ZHOU Quan;WANG Xiannan;YIN Lu;WU Lejun(Oilfield Technology Division of China Oilfield Services Co.,Ltd.,Langfang,Hebei 065201;Shenzhen Company of CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518000,China)

机构地区：[1]中海油田服务股份有限公司油田技术事业部,河北廊坊065201 [2]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《石油地质与工程》2022年第6期123-126,共4页Petroleum Geology and Engineering

基　　金：中国科学院战略性先导科技专项(A类)“随钻地层测试流体取样仪器研制”(XDA14020202)。

摘　　要：近几年南海东部电缆地层测试仪器在井下作业的遇卡频率越来越高,由此导致的时间损失在一定程度上提高了作业成本,针对该问题,对造成仪器遇卡的主控因素进行分析,认为影响仪器遇卡的原因主要为地质因素、环境因素及综合因素;其中,地质因素包括作业区块、层位及岩性等;环境因素包括井眼尺寸、井斜及泥浆密度等;综合因素包括仪器所在渗透段的位置、仪器外径与井眼尺寸相对大小以及测点井斜、压差等。将该研究成果实际应用于现场作业中,取得了较好的效果,对于提前判断仪器下井作业的风险点并采取相应的措施具有重要意义。In recent years,the stuck frequency of cable formation testing instruments in eastern South China Sea becomes higher,which leads to the time delay and then increases the operation cost.In view of this problem,the main controlling factors causing instrument stuck are analyzed.It is considered that the main reasons are related with geological,environmental and comprehensive factors.Among them,the geological factors include operation block,horizon and lithology.Environmental factors include borehole size,well deviation and mud density.The comprehensive factors include the position of the permeability section where the instrument is located,the relative size of the instrument outer diameter and borehole size,well deviation and differential pressure at the measuring point.The research results have been applied to field operation and achieved good results.It is of great importance to judge the risk points of instrument downhole operation in advance and take corresponding precautions.

关 键 词：南海东部地区 电缆地层测试 仪器遇卡 影响因素 

分 类 号：TE285[石油与天然气工程—油气井工程]