辽河油田欢2-14-16块MD膜驱油试验结果  

Field Results of MD Filming/Flooding Trial Project in Huan-2-14-16 Block Reservoir in Liaohe

作　　者：张维申[1,2] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油辽河油田分公司,辽宁盘锦124114

出　　处：《油田化学》2008年第3期277-280,共4页Oilfield Chemistry

摘　　要：分子沉积膜（MD膜）驱油是注入一种单分子双季铵盐水溶驱油的技术，注入的双季铵盐在油层孔隙表面形成纳米级MD膜，使原油与表面间黏附力降低，后续流体容易将原油剥离并驱出。该技术具有大量优点，适用于孔隙度10％--40％、渗透率〉10×10μm^2、温度0--320℃、剩余油饱和度〉25％、50℃原油黏率〈0．5Pa·s、地层水矿化度〈100g／L的油藏。油田面积1．1肼，有注水井7口，对应采油井11口的辽河欢2—14—16区大凌河0层油藏，于2001年3月开始注水开发，到2005年产量递减率达46．9％，综合含水达54．5％。从2006—05—18开始，分2个段塞，间隔30天，在7口注水井随注入水注入浓度0．8kg／m^3的膜驱剂，到2006—10—25为止累计注入膜驱剂45．62吨。从2006年6月到2007年5月一年内，81：2油井动液面上升，全区产油量停止递减，按月平均的日产油量增加到48．9吨，一年共增产油3453吨，比预测增油量增加5056吨。这一试验结果表明该项EOR技术已经成熟。图2表2参5。The molecular deposition （MD） filming/flooding technique for EOR presented in this paper covers injecting the aimed reservoir formation with aqueous solution of a diammonium salt, which creates on pore surfaces in the formation nanometric molecular deposition films and thus reduces the adhesion of crude oil to the surfaces with the residual crude oil reliesed and mobilized. This EOR method has lots of advantages and is suitable to reservoirs of porosity 10--40%, permeability 〉 10 × 10^-3/μm^2, temperature 0--320℃, residual oil saturation 〉25%, oil viscosity 〈0.5 Pa.s at 50℃, andTSD in formation water 〈100 g/L. At Huan-2-14-16 unit （of area 1.1 km^2）, Huanxiling, Liaohe, water flooding of reservoir layer Nol of Dalinghe Formation with 7 injection and 11 production wells was started March 2001 and a percent oil production decline of 46.9% and a compocsite watercut of 54.5% were reached in 2005. In a field trial, totally 45.62 t of diammonium salt in 0.8 kg/m^3 injection water solution in 2 slugs separated by a 30 day cease phase was injected into the reservoir layer Nol through these 7 injection wells from May 18, 2006 to Oct 25, 2006. In one year from June 2006 to May 2007, a raise in dynamic liquid level appeared in 8 of 11 production wells, the daily oil output averaged over every month in whole unit increased to 48.9 t and the increment in oil output in whole unit was of 3453 t, or by 5056 t more than the predicted increment. The field results of this trial showed that this EOR technique was well developed.

关 键 词：单分子双季铵盐 分子沉积膜(MD膜) 成膜驱油剂 分子沉积膜驱 注入参数 现场试验结果 辽河油田欢2—14—16块 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程] TE39