溪南庄油田水锥特征及剩余油分布研究

Study on water coning feature and remaining oil distribution in Xinanzhuang oilfield.

砂岩底水油藏水锥特征研究及其剩余油分布预测是油田开发技术中的一个难题。该文根据物质平衡和油气层渗流力学原理，通过对溪南庄油田水锥特征的研究，从油藏工程和数值模拟两方面定量描述了水锥孔隙体积在平剖面上的分布规律。指出该油藏水侵属非稳定状态水侵，水侵方式是底水锥进；剖面上水淹程度与油层打开程度密切相关，水锥高度大于未射开油层有效厚度，油层可能被水淹；平面上根据水锥波及范围，划分了五个可能存在的剩余油分布区，在预测的最好的剩余油富集区（Ａ区）获日产５０．８３ｔ的自喷无水工业油流，在预测剩余油较差的Ｅ区打调整井，只见少量油花。经油田开发验证，该预测结果准确、可靠。

The study of water coning feature and the forecast of remaining oil distribution in bottom water sandstone reservoir is a complicated development technical problem. According to the basic principle of material balance and the percolation mechanics of oil and gas,the transverse distribution of water coning pore volume is quantitatively described by means of reservoir engineering and numerical simulation based on the study of water coning features in Xinazhuang oilfield, bottom water coning unsteady influx in this reservoir,profile water swept degree is closely related to opening degree of oil layer, if coning highth is larger than the effective thickness of non opened oil layer, the oil layer can be watered cut. In plane, 5 possible existing oil distribution areas are divided. In the forecast most prolific existing oil concentration area ( A area ) drilled adjusting wells gained gushing non water industry oil of 50.83 t/d and in the poor remaining oil area ( E area ) gained some oil spots only. The forecast was proven to be correct and reliable.