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地质力学学报:2017,23(4):531-539
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裂隙特征对岩石渗流特性的影响规律研究
(1.西南石油大学油气藏地质及开发工程国家重点实验室, 四川 成都 610500;2.中国石化胜利油田分公司油气勘探管理中心, 山东 东营 257000;3.中国石油大学(华东)地质力学与工程研究所, 山东 青岛 266580;4.青岛市地铁八号线有限公司, 山东 青岛 266109)
A STUDY ON THE INFLUENCE RULE OF THE FRACTURE CHARACTERISTICS ON ROCK SEEPAGE CHARACTERISTICS
(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China;2.Manage Center of Oil and Gas Exploration of SINOPEC Shengli Oilfield Company, Dongying 257000, Shandong, China;3.Research Institute of Geological Mechanics and Engineering, China University of Petroleum, Qingdao 266580, Shandong, China;4.Qingdao Metro Line Eight Co., Ltd., Qingdao 266109, Shandong, China)
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投稿时间:2017-02-20    
中文摘要: 裂隙是油气储层主要的储集空间及流体渗流通道,影响油气的运移规律,是油气勘探开发的重要指标。以冀中坳陷任丘油田任10井为例,运用数值模拟方法研究了裂隙开展宽度和裂隙面粗糙度对岩石渗流特性的影响规律。研究结果表明,(1)裂隙开展宽度较小时,孔隙内流体压力仅在入口处小范围内呈扇形分布,裂隙中压力分布曲线呈正切函数型,流体流速在裂隙和孔隙中都较小;随着裂缝开展宽度的增加,孔隙内流体压力逐渐增大,裂隙中压力分布曲线逐渐向直线型转变,流体流速在入口处先减小后稳定,在裂隙中先增加后稳定;(2)裂隙面粗糙度对裂隙岩石渗流特性的影响与裂隙开展宽度有关,在裂隙开展宽度较大时,裂隙面粗糙度对流体压力的分布影响较大;随着裂隙面粗糙度增大,孔隙内流速逐渐增大,而裂隙中流速逐渐减小;(3)随着裂隙开展宽度的增大,影响裂隙流体流动的主控因素逐渐由裂隙开展宽度转变为裂隙面粗糙度。
Abstract:Fracture is the main reservoir space and fluid seepage channel in oil and gas reservoirs, which affects hydrocarbon migration directly as an important indicator of oil and gas exploration and development. In this study, the Ren 10 well in Renqiu Oilfield of the Jizhong depression was taken as an example, the influence rule of fracture width and fracture surface roughness on rock seepage characteristics was studied in this work by numerical simulation. The results show as follows: 1) When fracture width is small, fluid pressure in pore distributes as a fan and only in a small range of the entrance; pressure distribution curve in fracture is tangent function type, and fluid and flow velocity are both relatively small in fracture and pore. With the increase of fracture width, fluid pressure in pore increases gradually; pressure distribution curve in fracture gradually changes to linear type. Moreover, the fluid and flow velocity decrease first and then tend to be stable at the entrance while increase first and then tend to be stable in fracture. 2) The influence of fracture surface roughness on rock seepage characteristics varies with fracture width. When fracture width gets bigger, the influence of fracture surface roughness gets greater on the distribution of fluid pressure. With the increase of fracture surface roughness, flow velocity in pore gradually increases while that in fracture decreases. 3) With the increase of fracture width, the main controlling factor affecting fluid flow in fracture changes from fracture width to fracture surface roughness.
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基金项目:国家自然科学基金项目(41272141);国家科技重大专项(2016ZX05002-002)。
引用文本:
周汉国,郭建春,李静,等,2017.裂隙特征对岩石渗流特性的影响规律研究[J].地质力学学报,23(4):531-539.DOI:
ZHOU Hanguo,GUO Jianchun,LI Jing,et al,2017.A STUDY ON THE INFLUENCE RULE OF THE FRACTURE CHARACTERISTICS ON ROCK SEEPAGE CHARACTERISTICS[J].Journal of Geomechanics,23(4):531-539.DOI:

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