王场油田盐间层地层水结盐规律研究  

Analysis of Formation Water and Regularity of Salt of the Salt Interstratification in Wangchang Oilfield

作　　者：马超[1,2] 李伦[1] 肖杰[1] 张鑫[1] 

机构地区：[1]长江大学石油工程学院,油气钻采工程湖北省重点实验室,武汉430100 [2]高分子材料工程国家重点实验室,高分子研究所四川大学,成都610065

出　　处：《科学技术与工程》2015年第35期165-169,共5页Science Technology and Engineering

摘　　要：盐间泥质白云岩油藏是江汉盐湖沉积盆地非常独特的一种盐间烃源盐油气藏,其中王场油田盐间层具有典型代表性。由于地层水矿化度高,油井生产过程中产生大量的盐垢,导致维护费用大大增加,产量明显下降,酸化压裂效果变差,挤水压力高,有效期短。分析了该油田的地层水理化性能和模拟井筒条件下的井筒结盐规律。研究结果认为：结盐井地层水的的化学成份主要是NaCl,同时含有一定量的CaSO4和MgSO4,盐垢样主要为白云石、方解石和钙芒硝,与地层水成分是相吻合;随温度逐渐降低,地层水结盐量增加,特别是在50-70℃结盐速度最快;压力对结盐速度影响不大;低转速（10 000-30 000r/min）对结盐速度影响不大;而高转速（﹥100 000 r/min）条件下结盐速度减慢。Inter salt argillaceous dolomite reservoir is Jianghan Salt lake sedimentary basin very unique a salt between hydrocarbon source of salt and oil gas reservoir,which Wangchang oilfield salt layer has typical and representative. Since the formation water salinity,oil production process generates a lot of salt scale,resulting in greatly increased maintenancecosts,decreased production,acid fracturing effect of variation,squeeze the water pressure is high,valid for short. The wellbore formation water was analyzed under the laws of Salt physical and chemical propertiesand simulation of the field of wellbore conditions. Study concluded that： results for saltformation water chemical composition is mainly Na Cl,while acertainamountof CaSO_4 and MgSO_4,salt scale-like main dolomite,calcite and glauberite,andformationwater content is consistent. With decreasing temperature,the knot of salt increased,especially at 70 - 50 ℃ of salt fastest; pressure haslittleeffecton saltspeed; Low speed（ 30 000 - 10 000 r / min）speed has little effect on colorectal salt,and high speed（ 〉100 000 r / min） so that salt deposition slowed.

关 键 词：王场油田 地层水 盐含量 结盐速度 结盐规律 

分 类 号：TE133.2[石油与天然气工程—油气勘探]