摘要
针对新疆宝浪油田砂岩油藏高温（90～110℃）、低孔（1．37％～17．4％）、低渗（O．020-0．266μm^2）及裂缝发育的特点，研制了由0．6％～O．8％AM／AN共聚物PMN，0．3％～0．6％两种有机和一种无机物复合交联剂及0.1％～0．2％酸度调节／交联剂柠檬酸组成的水基凝胶调剖剂。该剂成胶时间4～60小时可调，储能模量≥10Pa，决定于各组分用量和成胶温度。0.5％PMN＋0．54％交联剂＋0.1％柠檬酸配方调剖剂在105℃放置12个月后，储能模量下降小于32％；在孔隙度31％-45％、渗透率2．6-5．5μm^2的岩心砂填充管中于90-95℃充分成胶后，封堵率〉90％。2003年宝浪油田两口注水井用该剂调剖后，注水压力上升2～3MPa，吸水剖面改善，有4口对应油井大幅度增油。图11表3参4。
An aqueous gelling fluid composed of 0.6-0.8% acrylamide/acrylnitrile copolymer PMN, 0.3-0.6% combinational crosslinker containing 2 organic and 1 inorganic chemicals, and 0.1-0.2% acidity regulator/crosslinker citric acid is prepared as profile modification agent （PMA） for use in naturally fractured sandstone oil reservoirs of high temperature, 90-110℃, low porosity, 1.37-17.4%, and low permeability, 0.020-0.266μm^2, in Baolang, Xinjiang. This PMA has gelation time controllable in range 4-60 hrs and storage modulus of ≥10 Pa, which are dependent upon the use levels of components and the gelation time. For an experimental gelling fluid, 0.5 % PMN ＋ 0.54 % crosslinker ＋ 0.1% citric acid, the storage modulus is decreased by no more than 32% after 12 month＇s ageing at 105℃ and the plugging rate is of 〉90% when completely gelated at 90-95℃ in milled reservoir rock sand packs of porosity 31-45 % and permeability 2.6-5.5μm^2. Treating 2 water injection wells in Baolang by using this PMA in 2003 resulted in an increase in water injection pressure by 2 and 3 MPa and in some improvements in watertake profile and in a notable raise of oil productivity as positive response of 4 connected poduction wells.
出处
《油田化学》
CAS
CSCD
北大核心
2006年第1期46-49,共4页
Oilfield Chemistry
基金
河南石油勘探局重点项目"高温裂缝性储层堵水调剖技术研究"(项目编号2004-028)
关键词
调剖剂
交联聚合物水基凝胶
地下成胶
丙烯酰胺共聚物
配方研究
耐高温性
裂缝性砂岩油藏
吸水剖面调整
新疆宝浪油田
profile modification agent
crosslinked polymer hydrogel
in-situ gelation
acrylamide copolymer
formulations ：high heat resistance
naturally fractured sandstone oil reservoirs
water injectivity profile modification
Baolang oilfield in Xinjiang
作者简介
路群祥（1954-）．男,副教授，高级采油工程师，河南大学化学系学士（1982），从事堵水调剖剂室内试验和现场应用研究，通讯地址：473132河南南阳河南石油工程技术研究院采油研究所。电话：0377-3834086，E-mail：1qx6716@163．com。
