伊拉克北部K油田碳酸盐岩储层电成像测井评价

K油田位于伊拉克北部库尔德地区,该油田发育白垩系浅海相碳酸盐岩储层,岩性主要为灰岩、白云岩以及之间的过渡类型。由于K油田碳酸盐岩储层非均质性严重,储集空间类型复杂,岩性多样化,裂缝多期发育,次生孔隙发育,仅仅依靠常规测井曲线已无法完成储层测井评价。本文利用电成像(XRMI)测井技术分辨率高、携带大量地质信息的优势,首先对K油田储层岩性进行精细解释,并识别出裂缝和孔洞。其次,利用测井解释系统定量分析电成像测井资料,得到了裂缝参数和孔洞参数,并将储层划分为裂缝孔洞型储层。最后,多口井的成像测井资料地应力综合分析结果表明,利用椭圆井眼和诱导缝计算的水平最大主应力方向一致,K油田白垩系储层的水平最大地应力方向主要为N-S向。实践证明,成像测井在伊拉克K油田碳酸盐岩储层评价中发挥了重要的作用。

APPLICATION OF ELECTRICAL IMAGING WELL LOGGING IN EVALUATION OF THE CARBONATE RESERVOIRS IN K OILFIELD IN NORTH IRAQI

K oilfield lies in Kurds area of north iraqi where carbonate reservoirs of Cretaceous shallow-sea facies develop and the lithology is mostly limestone,dolomite and transitional type.Due to strong heterogeneity,complicated reservoir type,diversified lithology,multi-age developed fracture and induced porosity in the carbonate reservoirs of K oilfield,conventional logs can not be only relied on in well logging evaluation. Electrical imaging(XRMI) well logging technology which has high resolution and lots of ge...