砂泥岩互层储层防砂优化设计试验研究  

Experimental Study on Optimized Sand Control in Sandstone-Mudstone Interbedded Reservoirs

作　　者：梁玉凯 楼一珊[2] 刘善勇 彭建峰 王利华[2] 高斐[2] Liang Yukai;Lou Yishan;Liu Shanyong;Peng Jianfeng;Wang Lihua;Gao Fei(Zhanjiang Branch of CNOOC(China)Co.,Ltd.;School of Petroleum Engineering,Yangtze University;Institute of Mud Logging Technology and Engineering,Yangtze University)

机构地区：[1]中海石油(中国)有限公司湛江分公司,海南省海口市570311 [2]长江大学石油工程学院 [3]长江大学录井技术与工程研究院

出　　处：《石油机械》2024年第12期118-124,共7页China Petroleum Machinery

基　　金：中国海洋石油集团有限公司重大科技专项“南海西部油田上产2000万方关键技术研究”(CNOOC-KJ 135 ZDXM 38 ZJ 01 ZJ)。

摘　　要：南海WC疏松砂岩油藏具有出砂严重、储层非均质性强和砂泥岩小层交错分布的特点。传统防砂设计方法适用性差,导致筛管堵塞严重,产能持续下降,严重影响了油田的正常开发。为研究砂泥岩互层对防砂筛管的堵塞机理,优选适合该类储层的防砂方式,基于相似模拟原理研制了可旋转式防砂物理模拟试验装置。利用该试验装置,结合现场实际工况重点考虑砂泥岩互层储层的互层比与井筒井斜角两大因素,评价分析了不同因素对防砂方式的影响。研究结果表明:互层比和井斜角对筛管防砂方式的选择有显著影响,当互层比小于0.4时,优先选用优质筛管防砂,反之则选用砾石充填防砂方式;井斜角小于45°时,互层比对砾石充填和防砂管堵塞程度影响较小;当井斜角超过45°时,井斜角对防砂管堵塞程度的影响不可忽略。研究成果对于指导砂泥岩互层储层的防砂优化设计具有重要的指导意义。The unconsolidated sandstone reservoirs in the WC oilfield in the South China Sea is characterized by severe sand production,strong reservoir heterogeneity and staggered distribution of sandstone-mudstone interbeds.However,traditional sand control methods are less applicable to such reservoirs,resulting in severe screen blockage and continuous decline in productivity,which seriously affects its normal development.In order to understand the mechanism by which sandstone-mudstone interbed blocks the sand control screen and select the sand control method suitable for this type of reservoirs,a rotatable sand control physical simulation test device was developed according to the analogy simulation principle.Then,using the test device,and considering the interbed ratio of sandstone-mudstone interbedded reservoir and the wellbore inclination depending on field conditions,the influences of different factors on sand control methods were evaluated.The results show that the interbed ratio and wellbore inclination have significant impacts on the selection of sand control methods.When the interbed ratio is less than 0.4,high quality screen is preferred for sand control;otherwise,gravel pack sand control is applied.When the wellbore inclination is less than 45°,the interbed ratio has a relatively small impact on the gravel pack and blockage degree of sand control screen.When the wellbore inclination exceeds 45°,the impact of the wellbore inclination on the blockage degree of sand control screen cannot be ignored.The study results have important guiding significance for optimization of sand control in sandstone-mudstone interbedded reservoirs.

关 键 词：防砂 砂泥岩互层 互层比 井斜角 筛管防砂 物理模拟 

分 类 号：TE358[石油与天然气工程—油气田开发工程]