砂岩储集层水淹层评价的地化录井方法

砂岩储集层水淹层评价一直是困扰油田开发工作者的一个难题，应用地化录井资料开展水淹层评价是储层地
球化学研究的一个新领域，可为油田二次开发寻找剩余油开辟新的途径。在深入分析油层水淹机理的基础上，从岩石
热解和气相色谱实验入手，结合密闭取芯井资料，通过计算孔隙度、含油饱和度、驱油效率等评价参数，建立砂岩储集
层水淹层评价模型和解释图版，形成一套具有适用性的定量计算和定性识别相结合砂岩储集层水淹层评价方法。应
用该方法，对A 盆地B 油田C 区D 层砂岩储层进行了7 口井水淹层评价，结果表明，利用地化录井方法评价砂岩水淹
层，经试油结果验证，符合程度较高，达到95% 以上，说明该方法适用性强，为油田开发中后期挖潜方案的调整和采收
率的提高奠定了基础。

Research on Chemical Logging Evaluation of Water FloodedLayer in Sandstone Reservoir

Evaluation on water flooded layer in the sandstone reservoir is a complex and difficult problem which has persecuted
oilfield workers for many years. It is a new field of geochemical investigation for evaluating waterflooded layer by geochemical
logging，which may be an effective and new way for finding residual oil in the secondary development stage. Based on the
depth analysis on the mechanism of the watered-out oil layer，gas chromatogram，pyrolysis chromatography and coring data，
the evaluation model of waterflooded layer and interpretation chart are established by calculating the parameter of porosity，oil
saturation，oil displacement efficiency，and so on，which provides the quantitative calculation and qualitative identification for
the evaluation method of waterflooded layer in the sandstone reservoir. The method is applied in the D group of C area in B
Field of A Basin. The result indicates that the effectiveness is very great，with the agreement rate of 95percent compared with
the result of well testing interpretation. The study revealed that the chemical logging method is applicable with great utilization
value，which lay the foundation for the scheme adjustment and the enhancing oil recovery of the oilfield in the mid-late period
of oilfield development.