稀油油藏密闭取心流体饱和度校正方法

doi:10.7657/XJPG20230314

摘要/Abstract

摘要：

针对吐哈盆地稀油油藏地层条件下的流体饱和度，以温米油田和鄯善油田丰富的密闭取心资料为基础，通过物理模拟对照实验，模拟取心过程中降压、脱气、蒸发损失等对岩心流体饱和度的影响，建立了适用于吐哈盆地稀油油藏的密闭取心流体饱和度校正模型。明确了降压脱气损失界限，即初始含水饱和度大于88%或小于33%时，降压脱气损失微弱，可忽略不计。新模型还考虑了孔隙体积变化、饱和度实验抽提损失以及不同水淹条件下的蒸发损失对饱和度测量的影响，有效提高了校正精度，与测井解释含油饱和度比较，误差为0.17%。

关键词: 吐哈盆地, 稀油油藏, 密闭取心, 含水饱和度校正, 物理模拟, 降压脱气, 蒸发损失

Abstract:

To determine the fluid saturation under the formation conditions of thin oil reservoirs in the Turpan-Hami basin, based on the data of sealed coring in the Wenmi oilfield and Shanshan oilfield, physical simulation control experiments were performed to simulate the influences of depressurized degassing and evaporation losses on core fluid saturation during coring, and then a fluid saturation correction model suitable for sealed coring of thin oil reservoirs in the Turpan-Hami basin was established. The limit of depressurized degassing loss is clarified, that is, when the initial water saturation is greater than 88% or less than 33%, the depressurized degassing loss is weak and negligible. The new model also takes into account the effects of pore volume change, extraction loss in saturation experiments, and evaporation loss under different flooding conditions on saturation measurement, effectively improving the correction accuracy. The error between the oil saturation derived from the model and that from logging interpretation is 0.17%.

Key words: Turpan-Hami basin, thin oil reservoir, sealed coring, water saturation correction, physical simulation, depressurized degassing, evaporation loss

中图分类号:

TE311

朱永贤, 姚帅旗, 张彦斌, 韩继凡, 赵瑞明. 稀油油藏密闭取心流体饱和度校正方法[J]. 新疆石油地质, 2023, 44(3): 359-364.

ZHU Yongxian, YAO Shuaiqi, ZHANG Yanbin, HAN Jifan, ZHAO Ruiming. Fluid Saturation Correction Method for Sealed Coring Wells in Thin Oil Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(3): 359-364.

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