海水基弹性微球深部调驱工艺在埕岛油田的应用  

Application of elastic microspheres of seawater based for deep profile control in offshore Chengdao oilfield

作　　者：任闽燕[1,2] 赵明宸[2] 徐赋海[2] 陆友明[2] 姜亦栋[2] 陈庆华[2] 崔峻[2] 赵福麟[3] 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石化胜利油田分公司,山东东营257000 [3]中国石油大学(华东)石油工程学院,山东青岛266580

出　　处：《油气地质与采收率》2014年第1期81-83,116,共3页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科技攻关项目"弹性微球调控优势流场改善水驱开发效果"(P12118)

摘　　要：埕岛油田主力含油层系馆陶组发育高孔、高渗透砂岩油藏，因高速开发，导致油井含水上升速度快。采用海水配制弹性微球，其初始粒径按照1／7～1／3倍孔喉直径的架桥准则进行选择，确定了微米级海水基弹性微球，并对海水基弹性微球的粒径与孔喉的匹配关系、粘度和双管驱替效果等进行了实验。结果表明，海水基弹性微球膨胀10～15d后粒径达到1．4～1．5倍孔喉直径时，可产生有效封堵；其初始粘度约为1mPa·s，易于进入油层深部。在埕北25A试验区，采用计量泵向高压注水管线中注入0．01倍孔隙体积的海水基弹性微球后，水井注入压力上升了1～2MPa，充满度提高了0．22～0．57，对应11口油井有9口井见效，平均含水率下降了7．6％，恢复水驱4a后仍有效，表明海水基弹性微球深部调驱工艺对海上油田稳油控水具有长效性。In the offshore Chengdao oilfield, the oil reservoir of Guantao member is consisted of high porosity and permeability sand-stone. Due to the high speed oil development, the water cut increased quickly. In this paper, we used the elastic microspheres of seawa-ter based to evaluate the matching relationship between the pore-scale and the feature of elastic-microspheres, the viscosity, and thedouble-tube driving test. The results suggested that the initial particle size of the elastic-microsphere is 1/3-1/7 times of the pore diam-eter, after 10-15 days, the microsphere particle size expands to 1.4-1.5 times of the pore diameter, which can plug the pore effectively.The initial viscosity of the microsphere solution is about 1 mPa?s, that can come into the layer deeply. It is applied in CB25A test areawith online mode for deep profile controlling technology. After 0.01 times pore volume flooding injection, the well's water pressure in-creased by 1-2 MPa, and the full-deep improved by 0.22-0.57. In the corresponding 11 wells, 9 are enhanced by this technique, andthe average water cut is reduced by 7.6%, moreover, the recovery performance is still enhanced even after 4 years of subsequent waterflooding. The elastic-microspheres of deep flooding to the oil stabilization and water control of offshore oilfield are of durable perfor-mance.

关 键 词：海水基弹性微球 深部调驱 封堵 砂岩油藏 埕岛油田 

分 类 号：TE343[石油与天然气工程—油气田开发工程]