冷 124 井区变质岩潜山油藏储层测井解释及其评价

Log interpretation and evaluation for buried hill oil pool of metamorphic rock in wellblock Leng 124

利用测井资料研究冷１２４潜山太古界变质岩的测井响应特征，可定性地判别出各种变质岩的储集岩和非储集岩；利用岩心观察和薄片鉴定资料制作了ΦＣＮＬ—ρｂ交会图，确定出定量划分储集岩与非储集岩标准。根据试油、试采资料，制作ΦＣＮＬ—ρｂ和ＲＬＬｄ—ＲＬＬｄ·ＲＬＬｓ－１·Δｔ交会图，确定了储集层（油水界面以上为油层）与非储集层（干层）划分标准。在此基础上，又根据变质岩储层的岩性、电性特点结合生产情况，制定了储层分类评价标准，并把储层划分为最好、较好和差三类储层。从而对冷１２４变质岩潜山单井储层进行了解释与评价，取得了满意效果。

Metamorphic reservoir or non reservoir rocks can be distinguished by studying log response of metamorphic rock of Archean in Leng 124 buried hill .Crossplot Φ CNL ρ b was made according to core observation and thin section identification,therefore the standard of quantitative dividing reservoir and nonreservoir rock was determined.Crossplot Φ CNL ρ b and R LLd R LLd ·R LLs -1 ·Δt were created according to data of oil well test and pilot production,the dividing standard of reservoir (oil bearing reservoir above oil water contact)and nonreservoir(dry sand) was determined.Based on these above,according to lithology and electric logging features of metamorphic rock reservoir ,considering production situation ,the evaluation criterion of reservoir classification was worked out.Reservoirs were divided into best ,better and poor three groups.Interpretation and evaluation for individual well reservoir in buried hill of Leng 124 metamorphic rock was satisfactory.