水驱砂岩油藏层间突进机理及对策——以鄂尔多斯盆地某砂岩油藏为例  

Mechanism and Measures of Interlayer Breakthrough during Water-floodingDevelopment of Sandstone Reservoir:Taking a Sandstone Reservoir in Ordos Basin as an Example

作　　者：张文博[1] 朱圣举[2,3] 朱洁 李建辉 朱荣彬 王健 ZHANG Wen-bo;ZHU Sheng-ju;ZHU Jie;LI Jian-hui;ZHU Rong-bin;WANG Jian(School of Earth Science and Resources,Chang an University,Xi an 710054,China;Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,Xi an 710018,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&Gas Fields,Xi an 710018,China;The Sixth Gas Production Plant,Changqing Oilfield Company,PetroChina,Xi an 710018,China;CNPC Xibu Drilling Engineering Company Limited,PetroChina,Jiuquan 735000,China;Digital Oilfield Institute,Chang an University,Xi an 710054,China)

机构地区：[1]长安大学地球科学与资源学院,西安710054 [2]中国石油长庆油田分公司勘探开发研究院,西安710018 [3]低渗透油气田勘探开发国家工程实验室,西安710018 [4]中国石油长庆油田分公司第六采气厂,西安710018 [5]中国石油西部钻探工程有限公司,酒泉735000 [6]长安大学地球科学与资源学院数字油田研究所,西安710054

出　　处：《科学技术与工程》2020年第17期6836-6841,共6页Science Technology and Engineering

基　　金：国家科技重大专项(2016ZX05050-004)。

摘　　要：针对两层在不同的注采压力系统下、单向渗流至今尚没有层间突进模型的问题,依据水驱油藏基本渗流理论,应用数学变换,推导出了单向渗流层间突进公式。利用鄂尔多斯盆地某实际砂岩油藏进行计算,相对误差为6.67%~6.96%。研究结果表明,上下两层水驱前缘位移之比与其相应的注采压差之比成线性关系,其斜率就是上下两层相应的储渗参数之比,斜率越大,则在共用一个注采压力系统的条件下,层间突进的程度越大。解决层间突进的有效方法就是调整分层压差。最佳分层压差就是满足斜率与分层压差之比值的乘积等于1时的压差,只有在这种条件下,上下两层在不同的位移处渗流速率均相等,也才不会发生层间突进现象。该方法在水驱砂岩油藏纵向非均质性评价以及分层压差优化设计等方面均具有推广价值。Aiming at the issue that there is no model about interlayer breakthrough for linear flow state in different injection-production pressure systems of two layers up to now,based on the water flooding theory of oil reservoir,the formula for describing the interlayer breakthrough about linear flow state was deduced by using flow line integral method.The interlayer breakthrough time in a block of the Ordos Basin was calculated by this method.The calculated result was close to the real time with an error of only 6.67%~6.96%,which indicated that the ratio of the displacements of waterflooding frontal edge in two layers has a linear relationship with the ratio of the corresponding injection-production pressure differences,and the slope of the line is the ratio of the corresponding flow field parameters of the two layers.The greater the slope,the greater the degree of inter-layer bursts under the condition that an injection pressure system was shared.The effective way to solve interlayer breakthrough was to adjust the injection-production pressure difference in different layers.The best layered pressure difference is to satisfy the ratio of slope to layered pressure is equal to 1.Only under this condition,the upper and lower layers seepage rates at different displacements are equal,and the interlayer prominence phenomenon does not occur.This method is worth popularizing in evaluation of profile heterogeneity and optimization of stratified injection-production differential pressure in waterflooding sandstone reservoirs.

关 键 词：渗流 纵向非均质性 水驱前缘 层间突进 模型 注采压差 砂岩油藏 

分 类 号：TE313[石油与天然气工程—油气田开发工程]