摘要
为了有效补充罗52区块长8低渗透油藏地层能量,提高油井产能,通过地层产出水矿化度、粒度、沉淀物组成等分析了罗52区块长8低渗透油藏存在的伤害,结合储层岩石矿物组成分析结果、储层敏感性评价实验和增产措施,认为该区块存在硫酸钙沉淀、氢氧化铁沉淀和微粒运移,酸化是造成地层伤害的重要原因,建议酸化过程加入铁离子络合剂和钙离子络合剂。
In order to effectively complement the formation energy and improve the productivity of Chang 8 low permeability reservoir in Block Luo 52,the type of formation damage and damage mechanism were analyzed on the basis of the data of salinity,particle size and the mineral composition of precipitation in produced water.In combination with the results of the rock mineral composition,evaluation of reservoir sensitivity and well stimulation,it is considered that the precipitation of calcium sulfate,iron hydroxide,fine particle migration and acidizing treatment are the major reasons of inducing formation damage.It is suggested that ironic ion and calcium ion complexing agents should added in acidizing.
出处
《石油天然气学报》
CAS
CSCD
2013年第8期121-123,126,共4页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2008ZX05)
关键词
低渗透油藏
储层伤害
产出水
长8油藏
low permeability reservoir
formation damage
produced water
Chang 8 reservoir
