电缆式地层测试技术在丘陵油田水淹层评价中的应用

丘陵油田主力区块已处于中高含水期,水淹状况非常复杂,用常规测井资料解释水淹层有一定的局限性.用电缆式地层测试资料解释水淹层,根据压力梯度的研究确定储层流体的密度,判断储层流体的性质以及推断气、油、水的接触界面,从而识别底水上升水淹层.地层测试技术还可以很好地发现压力异常层位,在常规测井资料难以识别的电阻率较高的高压淡水水淹层、储层部分层位水淹现象等方面有良好的应用效果.

Application of Wireline Formation Tester(WFT) Technology to Evaluating Water-flooded Reservoir in Qiuling Oilfield

Since the main productive area of Qiuling Oilfield has come into mid-high water-bearing stage and the flooded area has become very complex, conventional logging data are restricted in evaluating water-flooded reservoir. At present, the fluid densities of the area can be determined, the fluid properties and gas-oil-water interfaces assessed based on the pressure gradient when WFT data is applied to the water-flooded reservoir interpretation, thereby identifying the water-flooded reservoir with bottom water rises. At the same time, WFT technology helps discover the abnormal pressure formation, and has better advantage in log operation of the high pressure fresh water-flooded reservoirs and partial flooded reservoirs where the resistivity is higher and difficult to be identified by conventional log data.