卫星油田油层水洗状况综合分析

An Integrated Analysis of Water Flushed Formation of the Weixing Oilfield

卫星油田是一个新增石油探明储量的油田,因发现时间晚,开发周期短,缺少有关储层描述和水洗状况的资料,为了检查目前井网条件下葡萄花各类油层的水淹状况、剩余油分布特点,部署一口密闭取芯检查井。本文针对该区块注采关系不完善的现状,根据投产前或投产初期钻取的油基泥浆取芯井及密闭取芯井的资料,对储层的岩矿学特征进行评价,并利用得到的孔隙分布、相渗等特征参数进行水淹识别和计算,完成水洗动用状况分析,结果表明葡萄花油层束缚水饱和度较低,油水共渗范围宽,水淹动用状况比较差,水洗厚度小,水洗程度中等,井点采出程度低。

The Weixing Oiffield is a new oil field reported by the Limited Liability Company. As the oilfield was discovered not long ago, and its development cycle is short, the information on the reservoir description and formation water flooded degree are very insufficient. In order to check the formation water flooded degree and distribution of remaining oil of various Putaohua reservoirs under the current well network condition, the authors deployed a confined coring well-examination. Based on the analytical data of oil-based mud coring and confined coting in the early production or pre-production stage, this paper made a preliminary evaluation of the reservoir, and analyzed the washing degree through identifying and calculating flooding. The result shows that Putaohua reservoir has the following characteristics： irreducible water saturation is relatively low, oil and water seepage range is wide, flooding degree is low, washing thickness is thin, washing degree is medium, and well producing degree is low.