碳氧比能谱测井技术在南堡陆地浅层油藏的应用

Application of Carbon-oxygen Ratio(C/O) Spectral Logging Technology in Nanpu Onshore Shallow Reservoirs

南堡陆地浅层油藏已进入中后期高含水开发阶段,重新评价油层剩余油饱和度至关重要。通过分析碳氧比能谱测井的原理以及影响因素,扩展了其应用范围:一是确定老区块剩余油饱和度,判断油藏开采程度和边底水油藏的水淹程度;二是在非主力断块的老油井中寻找遗漏油层;三是在构造复杂、认识不清的区块,寻找低阻油层补孔潜力。现场61口井的实际应用表明,通过优化测试仪器的技术性能,该技术具有良好的推广前景。

Nanpu onshore shallow reservoirs have entered a high water cut development stage of intermediate and late period,in which reevaluating the remaining oil saturation of oil zones is of much importance.Through analyses of principles and impact factors of C/O spectral logging,the application scope of C/O spectral logging is extended to three additional aspects: the first is to determine the remaining oil saturation of old blocks and judge the exploitation degree of reservoirs and the watered-out degree of edge and bottom water;the second is to seek omitted oil zones in old oil wells within non-major fault blocks;the third is to look for reperforation potentials of low resistance reservoirs in the blocks of complex structures and those can not be clearly known.The field applications on 61 wells indicate that this technology has good prospect of popularization through optimization of the technical performance of the test instruments.