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自由水面的确认对计算原始石油地质储量和井网部署有着重要的意义,同时也是合理避水实现油田稳产的依据。灰岩油藏RFT测试中资料的不确定性和地层的复杂性往往导致自由水面计算结果存在一定的偏差。利用毛管力校正和基准面方法,校正筛选了RFT测试数据,并通过数学计算和概率分析的方法确定了水湿基质性灰岩地层的自由水面。实际应用表明,计算结果与实际结果符合程度较好,可用于自由水面的确定,研究成果对油田开发具有一定的指导意义。
The confirmation of free water surface is of great significance to the calculation of original petroleum geological reserves and well pattern deployment, and is also the basis for rational water avoidance to achieve stable oil production. The uncertainties of data and the complexity of the formation in the RFT test of limestone reservoirs often lead to some discrepancies in the free surface calculation results. Using capillary force calibration and datum method, the RFT test data was corrected and screened, and the free surface of water-wet matrix limestone stratum was determined by mathematical calculation and probability analysis. The practical application shows that the calculation results are in good agreement with the actual results and can be used for the determination of free water surface. The research results have certain guiding significance for oilfield development.