第33卷第4期 2016年7月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi: 10.3696/j.issn.1001-5620.2016.04.007
抗高温无固相弱凝胶钻井完井液技术文飞，董殿彬，田玉龙，黄杰，刘昕，王皓
（激海钻探泥浆技术服务分公司，天津300280）
文飞等.抗高温无固相弱凝胶钻井完井液技术[].钻井液与完井液，2016，33（4：36-40
Vol.33 No.4 July2016
摘要针对委内瑞拉西部BARUA区块产层泥砂岩互层多，砂岩胶结不充分，地层松傲、易垢易漏、地温梯度高以及Barua区块油藏物性较差，产收率低的问题，为了保持井壁稳定、减少表皮污荣，通过室内实验研究了BH-ELASTICO HTHP体系。该体系按照“流体套管技术”理念，利用体系高黏度特点，配合白云质碳酸钙有效封堵产层孔喉，稳定并壁和降低表皮污染；利用低剪切速率黏度高的特点实现井底净化和钻屑返出；该体系还具有抗高温、抗腐蚀性强、主剂材料易降解等优点，适用于低密度、低渗、成岩性差的地层。
MGB-0066并现场试验应用表明，BH-ELASTICO-HTHP体系防
漏防竭能力强，对储层和环境保护性好，
该并产量超过邻并产量30%以上，达到了安全结并和提高油并产量的双重目的。
“流体套管技术”理念也为老油田及低油藏物性油田的增产增收指出了方向。
BH-ELASTICO-HTHP体系的
关键词水基钻井完井液；无固相；高黏弹性；流体套管；强封堵性；抗温；储层保护
中图分类号：TE254.3
文献标识码：A
文章编号：1001-5620（2016）04-0036-05
High Temperature Solid Free Water Base Drill-in Fluid
WEN Fei, DONG Dianbin, TIAN Yulong, HUANG Jie, LIU Xin, WANG Hao
(Drilling Fluid Technology Services of CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280)
Abstract The reservoir formations in the Block Barua, west Venezuela, are characteristic of multiple interbedded mudstones and sandstones, unconsolidated sandstones because of poor cementation, borehole wall collapse and frequent mud losses, high temperatures and poor reservoir physical properties. A drilling fluid named BH-ELASTICO-HTHP has been developed based on the “fluid casing concept" to try to maintain borehole stability during drilling and to minimize skin contamination of the reservoir formations. The BH ELASTICO-HTHP drilling fluid has high viscosity and low gel strengths, and can be used to stabilize borehole wall and reduce skin factors when treated with dolomitic CaCO, as a temporary plugging agent. The low-shear-rate viscosity of the BH-ELASTICO-HTHP drilling fluid helps clean the borehole. As a high temperature drlling fluid formulation, with its main additives easy to degrade, this drilling fluid is suitable for use in drilling formations with low pore pressure, low permeability, and unconsolidated formations. The application of this drilling fluid in the well MGB-0066 demonstrates that the BH-ELASTICO-HTHP drilling fluid has strong mud loss eseaeoaaaeeaeeeo friendly. The well MGB-0066 has actual oil production rate 30% more than that of the offset well. The use of the BH-ELASTICO-pn sa didaoon eaoordaeae uaes aiearin l formulations for use in old oilfield or in reservoirs with poor physical properties.
Key words Water base drll-in fluid; Solid free; High viscosity; Fluid casing; Plugging performance; Temperature resistant; Formation damageprevention
抗高温无固相弱凝胶钻井完井液(BH-ELASTICO-HTHP）体系具有抗高温、高黏、强封堵、对油气层伤害小、抗腐蚀性强、主剂材料易降解等优点，适用于低密度、低渗、成岩性差的地层[1-2]。
委内瑞拉Barua区块产层泥砂岩互层多，砂岩胶结不充分、地层松散易塌易漏、地温梯度高，油藏物性较差、产收率低。针对以上问题，为保持井壁稳定、减少表皮污染，增加油并产量，接照“流体
第一作者简介：文飞，工程师，1983年生，2007年毕业于长江大学石油工程专业，现从事油基和高性能水基钻井液
的研究及海外现场工作。电话（022）25976374；E-mail：wenfei-2003@163.com。万方数据