缝洞型储层酸压改造纤维暂堵规律研究
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摘要
针对塔河油田缝洞型碳酸盐岩大型复合酸压过程中液体滤失严重的现象,现场提出了纤维暂堵技术。实验利用高温高压酸岩反应流动仪,进行裂缝型储层纤维暂堵性能室内评价。测得不同纤维浓度、长度和不同温度下的定排量最大驱替压差和暂堵时间,研究了温度对纤维降解率的影响。实验结果表明:纤维浓度越大,形成滤饼的承压能力越强,最大驱替压差和暂堵时间越大;较长纤维易缠绕架桥形成滤网,增大渗流阻力,从而增大最大驱替压差和暂堵时间;温度升高,纤维降解速率增快,滤饼致密性降低,最大驱替压差和暂堵时间减小。实验结果对塔河缝洞型油田酸压改造、酸压设计及现场施工都有积极的指导意义。
Large composite acid fracturing is the main stimulation method in Tahe carbonate reservoirs.However,abundant natural fracture-cavern system results in severe acid leak off.The experiment was carried out by acidizing flow instrument to evaluate fiber plugging performance.The maximum differential pressure and plugging time were got under different length and concentration of fiber and different temperature.Experiment results show that maximum differential pressure and plugging time increase with the increasing of concentration of fiber.Longer fibers form fiber cake more easily.Fiber cake can make flow resistance larger.So the maximum differential pressure and plugging time increase.The degradation rate of fibers increase by increasing the temperature,which causes low compactness of fiber cake.So the maximum differential pressure and plugging time decrease.The experimental results have positive significance on the acid fracturing modification,acid fracturing design and site construction in Tahe oil field.
Large composite acid fracturing is the main stimulation method in Tahe carbonate reservoirs.However,abundant natural fracture-cavern system results in severe acid leak off.The experiment was carried out by acidizing flow instrument to evaluate fiber plugging performance.The maximum differential pressure and plugging time were got under different length and concentration of fiber and different temperature.Experiment results show that maximum differential pressure and plugging time increase with the increasing of concentration of fiber.Longer fibers form fiber cake more easily.Fiber cake can make flow resistance larger.So the maximum differential pressure and plugging time increase.The degradation rate of fibers increase by increasing the temperature,which causes low compactness of fiber cake.So the maximum differential pressure and plugging time decrease.The experimental results have positive significance on the acid fracturing modification,acid fracturing design and site construction in Tahe oil field.
引文
1张烨,杨胜来,焦克波.塔河油田超大型复合酸压降滤失技术研究.西南石油大学学报:自然科学版,2014;36(3):121—126Zhang Ye,Yang Shenglai,Jiao Kebo.Technology research about super large composite acid fracturing filtration in Tahe oil field.Journal of Southwest Petroleum University:Science&Technology Edition,2014;36(3):121—126
2 刘美娟.塔河油田碳酸盐岩油藏酸压改造降滤失技术研究.北京:中国石油大学(北京),2010Liu Meijuan.Research on acid leakoff control technique in acid fracturing for carbonate reservoir in Tahe oil field.Beijing:China University of Petroleum(Beijing),2010
3 Cohen C E,Tardy P M J,Lesko T M,et al.Understanding diversion with a novel fiber-laden acid system for matrix acidizing of carbonate formations.Spe Annual Technical Conference&Exhibition,2010
4 Jauregui L,Alonso J,Aramco S,et al.Successful application of novel fiber laden self-diverting acid system during fracturing operations of naturally fractured carbonates in saudi arabia.Spe Middle East Oil&Gas Show&Conference,2011
5 杜娟,刘平礼,赵立强,等.非均质储层酸化用醋酸纤维暂堵剂.钻井液与完井液,2012;29(5):77—78Du Juan,Liu Pingli,Zhao Liqiang.Acetate fiber temporary plugging additive used in acidizing of non-homogeneous reservoirs.DFCF,2012;29(5):77—78
6 Quevedo M,Tellez F,Torres R,et al.An innovative solution to optimizing production in naturally fractured carbonate reservoirs in southern mexico.SPE Latin Americaand Caribbean Petroleum Engineering Conference.Society of Petroleum Engineers,2012
7 周福建,伊向艺,杨贤友,等.提高采收率纤维暂堵人工裂缝动滤失实验研究.钻采工艺,2014;37(4):83—86Zhou Fujian,Yi Xiangyi,Yang Xianyou.Dynamic filtration experiment of fiber temporary plugging artificial fracture.DPT,2014;37(4):83—86
8 Droger N,Eliseeva K,Todd L,et al.Degradable fiber Pill for lost circulation in fractured reservoir sections.SPE168024,2014
9 Martin F,Quevedo M,Tellez F,et al.Fiber-assisted self-diverting acid brings a new perspective to hot,deep carbonate reservoir stimulation in Mexico.SPE 138910,2010
10 Al-Ismail M I,Al-Harbi M M,Al-Harbi A K,et al.Field trials of fiber assisted stimulation in Saudi Arabia:an innovative non-damaging technique for achieving effective zonal coverage during acid fracturing.Society of Petroleum Engineers,2008
11 Jairo L J,Malik A R,Walter N G,et al.Field trials of a novel fiber-laden self-diverting acid system for carbonates in Saudi Arabia.SPE 132003,2010
2 刘美娟.塔河油田碳酸盐岩油藏酸压改造降滤失技术研究.北京:中国石油大学(北京),2010Liu Meijuan.Research on acid leakoff control technique in acid fracturing for carbonate reservoir in Tahe oil field.Beijing:China University of Petroleum(Beijing),2010
3 Cohen C E,Tardy P M J,Lesko T M,et al.Understanding diversion with a novel fiber-laden acid system for matrix acidizing of carbonate formations.Spe Annual Technical Conference&Exhibition,2010
4 Jauregui L,Alonso J,Aramco S,et al.Successful application of novel fiber laden self-diverting acid system during fracturing operations of naturally fractured carbonates in saudi arabia.Spe Middle East Oil&Gas Show&Conference,2011
5 杜娟,刘平礼,赵立强,等.非均质储层酸化用醋酸纤维暂堵剂.钻井液与完井液,2012;29(5):77—78Du Juan,Liu Pingli,Zhao Liqiang.Acetate fiber temporary plugging additive used in acidizing of non-homogeneous reservoirs.DFCF,2012;29(5):77—78
6 Quevedo M,Tellez F,Torres R,et al.An innovative solution to optimizing production in naturally fractured carbonate reservoirs in southern mexico.SPE Latin Americaand Caribbean Petroleum Engineering Conference.Society of Petroleum Engineers,2012
7 周福建,伊向艺,杨贤友,等.提高采收率纤维暂堵人工裂缝动滤失实验研究.钻采工艺,2014;37(4):83—86Zhou Fujian,Yi Xiangyi,Yang Xianyou.Dynamic filtration experiment of fiber temporary plugging artificial fracture.DPT,2014;37(4):83—86
8 Droger N,Eliseeva K,Todd L,et al.Degradable fiber Pill for lost circulation in fractured reservoir sections.SPE168024,2014
9 Martin F,Quevedo M,Tellez F,et al.Fiber-assisted self-diverting acid brings a new perspective to hot,deep carbonate reservoir stimulation in Mexico.SPE 138910,2010
10 Al-Ismail M I,Al-Harbi M M,Al-Harbi A K,et al.Field trials of fiber assisted stimulation in Saudi Arabia:an innovative non-damaging technique for achieving effective zonal coverage during acid fracturing.Society of Petroleum Engineers,2008
11 Jairo L J,Malik A R,Walter N G,et al.Field trials of a novel fiber-laden self-diverting acid system for carbonates in Saudi Arabia.SPE 132003,2010