PFL系列超高温聚合物降滤失剂在徐闻X3井的应用  

Application of PFL Series Ultra-High Temperature Polymer Filtrate Reducer in Xuwen X3 Well

作　　者：田璐[1] 李胜[1] 杨小华[1] 王琳[1] 王治法[1] 

机构地区：[1]中国石化石油工程技术研究院,北京100101

出　　处：《油田化学》2012年第2期138-141,共4页Oilfield Chemistry

基　　金：中国石化科技开发重点项目"超深井钻井液降滤失剂研究与应用"(项目编号P08075)

摘　　要：PFL系列聚合物降滤失剂具有黏度低、耐温抗盐降滤失效果显著等特点。质量分数为1%的PFL-L、PFL-H水溶液的表观黏度分别为12 mPa.s和26 mPa.s。在240℃滚动老化16 h情况下,加有5%PFL-L的盐水泥浆(4%膨润土浆+36%NaCl)的滤失量由226 mL(空白样)降至32 mL;加有4%PFL-H的盐水泥浆的滤失量由226mL(空白样)降至8.2 mL;加有1.5%PFL-H的淡水泥浆(4%膨润土浆)的滤失量为由100 mL(空白样)降为9.6 mL。以PFL系列超高温聚合物降滤失剂为主,结合磺化类降滤失剂、抑制剂、防塌剂、稀释剂,形成了抗200℃强抑制盐水及淡水钻井液体系。现场应用表明,PFL系列超高温聚合物降滤失剂抗高温能力强,降滤失效果显著,确保井深5974 m、电测温度为211℃的徐闻X3井顺利钻至井深6010 m。PFL series polymer filtrate reducer is characterized of low viscosity, good capacities of depressing the filter loss, heat resistance and salt tolerance. The apparent viscosity of 1% PFL-L aqueous solution and 1% PFL-H aqueous solution were 12 mPa.s and 26 mPa＇s, respectively. After aging at 240℃/16 h, with the addition of 5 % PFL-L, tile filer loss （FL） of the saturated salt water mud（SSWM）, composed of 4% bentonite and 36% NaCl, decreased from 226mL （blank group） to 32 mL;with the addition of 4% PFL-H, the FL of the SSWM decreased from 226 mL（ blank group） to 8.2 mL;with the addition of 1.5% PFL-H, the FL of fresh water mud, composed of 4% bentonite, decreased from 100 mL（blank goup）to 9.6 mL. Based on the PFL series ultra-hlgh temperature polymer filtrate reducer and the optimized sulfonating filtrate reducer, inhibitor, lubricant, thinner, the strong inhibited brine and fresh drilling fluids, which were heat resistant to 200℃, were formed. The field application manifested that the PFL series ultra-high temperature polymer filtrate reducer showed strong heat resistance and good capacities of depressing the filter loss, making sure that the Xuwen X3 well was drilled to 6010 m and the logging temperature of 211℃ at the depth 5974 m.

关 键 词：超高温油藏 降滤失剂 耐温抗盐 流变性 

分 类 号：TE254.4[石油与天然气工程—油气井工程]