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大庆外围朝阳沟油田属低渗透岩性、岩性-构造油藏,由于受岩性、沉积微相、微构造及断层等因素的控制,油水关系较为复杂,注水开发后层内水淹机理及水洗状况更加复杂,水淹层解释较为困难。根据朝阳沟油田已投产井井壁取心分析资料及密闭取心井分析资料,主要通过岩石热解分析、饱和烃气相色谱分析、荧光显微图像分析等录井新技术,建立了有效孔隙度与剩余油饱和度评价图版、不同水洗程度饱和烃气相色谱判别标准、有效孔隙度和饱和烃总面积图版、Pr/nC17与∑nC21-/∑nC22+关系图版、不同水洗程度荧光图像判别标准等适合于低渗透油层的水淹解释评价方法。将这些解释评价方法应用于朝阳沟油田加密区块,共解释47口井389层:未淹油层解释235层,符合率为91.0%;低水淹层解释102层,符合率为83.3%;中水淹层解释52层,符合率为75.0%。
Due to the control of lithology, sedimentary microfacies, micro-structure and fault, the oil-water relationship in Chaoyanggou Oilfield, which is a low-permeability lithologic and lithologic-structural reservoir outside Daqing, is quite complicated. Washing conditions more complicated, flooded layer interpretation is more difficult. According to the data of coring analysis of coring wall in Chaoyanggou oilfield and the analysis data of airtight coring well, the effective porosity (porosity) is established through the new logging technology such as pyrolytic analysis, saturated hydrocarbon gas chromatography and fluorescence microscopic image analysis. And the remaining oil saturation evaluation plate, different degrees of water saturation of saturated gas chromatography gas chromatography standards, the total effective porosity and saturated hydrocarbon plate, Pr / nC17 and ΣnC21- / ΣnC22 + relationship between the plate, Evaluation method of water flooding in low permeability reservoirs. These interpretation and evaluation methods are applied to the encryption block of Chaoyanggou oilfield, and a total of 389 wells in 47 wells are explained: 235 wells are unexpanded and the coincidence rate is 91.0%; 102 wells are interpreted as low water flooded layer with a coincidence rate of 83.3% Flooded layer explained 52 layers, with a coincidence rate of 75.0%.