广利油田纯化镇储集层敏感性评价

广利油田纯化镇储集层中存在伊/蒙混层、高岭石、伊利石等粘土矿物及方解石等碳酸盐矿物.这些矿物均有不同程度的敏感性,在油田勘探开发的不同阶段,会对储集层造成伤害.研究表明,纯化镇储集层具有酸敏性;其盐度、水性、碱度等为非敏感性,对储集层渗透性基本无影响.因此,可采用提高注水速度、用磷酸酸化、或在土酸或盐酸酸化时在酸化液中加入稳定剂(冰醋酸)等方法作为油田增产措施.

Sensitivity evaluation on Chunhuazhen reservoir in Guangli oilfield

Clay mineral of illite/montmorillonite mixing layer, kaolinite, illite etc. and carbonate mineral of calcite etc. exist in Chunhuazhen reservoir in Guangli oilfield. Sensitivity of different degree appearing in these minerals may damage the reservoir at different stages of exploration and development of the oilfield. The research indicates that acid?sensitivity exists in the reservoir; non?sensitivity to its salinity, water quality, alkalinity etc. and the permeability of the reservoir is not influenced by them basically. So well stimulation may be selected by improving water injection rate, acidizing by phosphoric acid or adding stabilization agent (acetic acid) in acid solution when acidizing by mud acid or hydrochloric acid.