高矿化度钻井液侵入后储集层双侧向电阻率实验校正

doi:10.7657/XJPG20220414

摘要/Abstract

摘要：

为消除高矿化度钻井液侵入对双侧向电阻率的影响,通过岩电实验分析影响因素,改进电极系和测量工艺,使非渗透层岩样电阻率与双侧向电阻率一致。在高温高压条件下,用半渗透隔板气驱法测量岩电参数,再用高矿化度钻井液驱替模拟钻井液侵入。以此为基础,建立岩样电阻率与测井电阻率的对应关系,形成以实验为依据的电阻率测井校正方法。在准噶尔盆地腹部多口钻井的应用表明,应用校正后的电阻率计算的含气饱和度更为合理,为测井响应研究和储集层评价提供了有效手段。

关键词: 高矿化度, 钻井液, 半渗透隔板, 高温高压, 岩电实验, 双侧向电阻率, 电阻率校正, 饱和度评价

Abstract:

In order to eliminate the influences of high salinity drilling fluid invasion on dual lateral resistivity, it is necessary to restore the real resistivity of formation. By analyzing the factors influencing rock electric experiment, the electrode system and measuring technology were improved to make the resistivity of the rock sample from impermeable layers consistent with the double lateral resistivity. Under the conditions of high temperature and high pressure, the rock electric parameters were measured with the semi-permeable baffle plate gas flooding method, and then the drilling fluid invasion was simulated by displacing the oil in rock samples with high salinity drilling fluid. Finally, the relationship between rock sample resistivity and logging resistivity was established and a correction method for logging resistivity based on experiment was formed. The application of the method in multiple wells in the hinterland of Junggar basin shows that the gas saturation calculated with the corrected resistivity is more reasonable. The method provides an effective means for logging response analysis and reservoir evaluation.

Key words: high salinity, drilling fluid, semi-permeable baffle plate, high temperature and high pressure, rock electric experiment, dual lateral resistivity, resistivity correction, saturation evaluation

中图分类号:

TE135

牟立伟, 王刚, 罗兴平, 樊海涛, 林世均, 王国辉. 高矿化度钻井液侵入后储集层双侧向电阻率实验校正[J]. 新疆石油地质, 2022, 43(4): 474-478.

MU Liwei, WANG Gang, LUO Xingping, FAN Haitao, LIN Shijun, WANG Guohui. Experimental Correction of Dual Lateral Reservoir Resistivity After High Salinity Drilling Fluid Invasion[J]. Xinjiang Petroleum Geology, 2022, 43(4): 474-478.

图/表 3

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