摘要
为了搞清苏东区块的地层水性质及分布特征,针对苏东地区气水关系及地层水水化学特征认识程度低的问题,该文在气体地层水分析化验数据基础上,开展地层水的类型、产出水化学特征、水化学特征系数等工作。结果表明:南部和北部产出水为地层水,中部为凝析水;气井初期排出压裂液,后期逐渐产出地层水;矿化度呈现西南部高,东北部较低;南部地层水封存条件高于北部;南部地区水岩作用时间比北部强,从油气保存角度来看,南部优于北部。该研究对提高苏东区块地层水认识,指导气田快速高效开发具有参考价值。
In Sudong area, the relationship between gas and water is complex and the hydrochemical characteristics of formation water is unclear, therefore, site administrators are eager to understand the formation water properties and its distribution characteristics in Sudong gas reservoir. Based on the analytical data of formation water, this paper studied the type of formation water, the chemical characteristics of produced water, and the hydrochemical characteristics coefficient. The results showed that the water produced in the south and north is formation water and the middle is condensate water;the fracturing fluid is discharged at the early stage of the gas well production, and the formation water is gradually produced in the later stage;the salinity is high in the southwest and lower in the northeast;the water storage condition in the southern formation is higher than that in the north;the time of the water and rock action in the southern area is stronger than that in the north, and from the perspective of oil and gas preservation, the south is better than the north. The research would have a great significance for improving the understanding of formation water in the Sudong Block and guiding the rapid and efficient development of the gas field.
作者
张林
徐铜浩
杨智凯
杨洋
夏阳
叶鉴文
ZHANG Lin;XU Tonghao;YANG Zhikai;YANG Yang;XIA Yang;YE Jianwen(Fifth Gas Recovery Factory of PetroChina Changqing Oilfield Company,Xi’an 710021,China;College of Energy Resources,Chengdu University of Technology,Chengdu 610059,China)
出处
《非常规油气》
2021年第5期27-33,共7页
Unconventional Oil & Gas
基金
国家自然科学基金资助项目“页岩储层原始地应力场仿真与局部人工扰动规律研究”(51304032)。
关键词
苏东区块
地层水
水化学特征
水化学特征系数
Sudong Block
formation water
hydrochemical characteristics
hytrochemical characteristics coefficient
