摘要
在模拟油藏条件和不改变目前蒸汽吞吐工艺的条件下,利用胜利油区单家寺油田单六区东块稠油,选择硫酸镍、硫酸钴、硫酸亚铁、硫酸铁、三氯化铁、氯化亚铁和磷钼酸铵等7种可溶性盐作为催化剂配方成分,进行了复配体系筛选,并利用优选出的催化剂体系,研究在地层中对稠油进行催化改性降粘的可行性及催化降粘效果的影响因素。结果表明:特稠油或超稠油体系在蒸汽开采中具有被催化降粘的可能性,不同催化剂体系的催化效果差别很大;催化剂质量分数、催化反应温度和时间共同影响催化剂体系的降粘效果;pH值小于4和含水率为15%～50%的油藏催化降粘效果较好。因此,针对不同原油和开采状况需要选择不同的催化剂体系。
Without changing current cyclic steam technology,selecting viscous crude oil viscous crude oil from Shan6 block in Shajiasi field as test fluids,the feasibility of modifying physical properties to reduce viscosity of viscous crude oil trough in-situ catalytic reaction is studied and effect of in-situ catalysis on viscosity reduction is analyzed herein.At simulated reservoir condition,compound catalyst systems containing dissoluble salt component such as Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,Mo,Al,etc.are screened,and catalyst mass fraction,catalytic reaction duration,temperature,water cut in reservoir and PH effect catalytic viscosity reduction for preferred catalyst system are studied.It is shown that it is impossible for ultra- or extra viscous crude oil to be catalyzed in the process of cyclic steam,and catalytic effect of different catalyst systems is much different,and catalyst mass fraction,catalytic reaction duration and temperature all influence catalytic viscosity reduction.It also indicated that catalytic viscosity reduction will achieve a better effect when PH is lower than 4 and water cut of 15%-50% in reservoir,so,it is necessary to select a favorable catalyst system according to crude oil physical properties and exploitation conditions.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第6期97-99,117,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石化股份科研攻关项目"王庄油田水敏性稠油油藏开发关键技术研究"(P04055)
关键词
稠油
催化降粘
催化剂
降粘率
影响因素
heavy oil
catalytic viscosity reduction
catalyst
viscosity reduction rate
effecting factor
