多分支井三维势分布实验新方法  

A New Approach of 3D Potential Distribution Experiment for Multi-lateral Wells

作　　者：徐立坤[1,2] 韩国庆[2] 张睿[2] 赵华伟[2] 宋勇[3] 

机构地区：[1]中国石油勘探开发研究院,北京海淀100083 [2]中国石油大学石油工程教育部重点实验室,北京昌平102249 [3]中国石化胜利油田地质科学研究院,山东东营257015

出　　处：《西南石油大学学报（自然科学版）》2015年第1期116-122,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大专项(2011ZX05009–005);国家科技重大专项(2008ZX05014–004)

摘　　要：针对实际油藏开发中,井筒流动阻力对等压线分布影响认识不清的问题。开展了相应实验研究,研究中采用改进的电模拟实验方法:测量了多分支井近井地带三维势分布;在井模型上焊接碳膜电阻模拟井筒流动阻力对等压线分布的影响;测量了不同电解质溶液浓度下等压线分布变化。实验结果表明:分支井在近井空间内的等势面与井的形状相似并呈弧面向外凸起;考虑井筒阻力时水平井等压线呈鸡蛋形而非椭圆形,井控面积减少,近井地带存在压降使得等压线穿过井筒所在位置;低渗状态下分支井井控面积更大,各分支贡献更明显,有利于开采。对于研究实际条件下,多分井的控制体积具有较高的指导意义。The effects ofwellbore flow resistance and permeability on equi-pressure contour distribution is unclear in reservoir development, so the modified electrolytic simulation experiment was carried out. Nearwellbore 3-19 potential distribution of multi-lateral wells was measured; the effects of wellbore flow resistance and permeability on equipressure contour distribution were studied with a film resistors well model and different concentration of the electrolyte respectively. The results show that the equipotential surface was cambered outward convex, that the surface shape in the nearwellbore space was similar to well architecture; that equipressure contours were egg-shaped rather than oval when considering the resistance of the wellbore,and that the control area decreased. Since nearwellbore pressure drop existsed, the equipressure contours passed through the well- bore location. The drainage area extended and each branch contributed more effectively in low permeability reservoirs. The results will have a great significance in determining the drainage area of multi-lateral wells.

关 键 词：多分支井 三维势分布 等压线 井筒阻力 电模拟实验 

分 类 号：TE319[石油与天然气工程—油气田开发工程]