论文部分内容阅读
东濮凹陷桥口气藏储层属低孔—特低孔、低渗透—特低渗透致密储层,在各种作业过程中,极易受到损害。研究储层的敏感性,提出相应的储层保护建议,对保护油气层,减少储层污染具有重要的指导意义。通过对桥口气藏储层中敏感性矿物种类、结构和含量的研究,分析了其潜在的敏感性。实验结果表明,桥口气藏储层敏感性总体为中等。储层速敏程度较弱;水敏程度中等偏强;盐酸酸敏程度极强,对氢氟酸、土酸和氟硼酸均没有表现出酸敏性;碱敏程度中等偏弱。因此,在对桥口气藏进行施工作业时,应把防止盐酸酸敏及水敏放在第—位,并兼顾其他敏感因素,有针对性地采取相应措施,将对气层的污染降至最小。
Dongpu Depression Qiaokou gas reservoir is a low-porosity - low porosity, low permeability - ultra-low permeability and tight reservoirs, in a variety of operations, vulnerable to damage. Studying the sensitivity of reservoirs and proposing corresponding reservoir protection suggestions have important guiding significance for protecting oil and gas reservoirs and reducing reservoir pollution. Through the study of the types, structures and contents of sensitive minerals in Qiaokou gas reservoirs, the potential sensitivity is analyzed. The experimental results show that the reservoir sensitivity of Qiaokou gas reservoir is generally medium. The sensitivity of the reservoir is weak; the degree of water sensitivity is moderately strong; the degree of acid sensitivity of the hydrochloric acid is extremely strong; no acid sensitivity is shown for the hydrofluoric acid, the earth acid and the fluorine boric acid; and the degree of alkali sensitivity is moderately weak. Therefore, in the construction of Qiaokou gas reservoirs, acid rain and hydrochloric acid should be prevented in the first place, taking into account other sensitive factors, and take appropriate measures to minimize the pollution to the gas layer .