河道砂油藏开发中后期配产配注方法及应用  

Approach and application of proration and injection allocation at the middle-late production stages in channel sandstone reservoirs

作　　者：冯斌[1] 吕爱民[2] 王伟[2] 赵峰华[1] 

机构地区：[1]中国矿业大学地球科学与测绘工程学院,北京100083 [2]中国石油大学石油工程学院,山东东营257061

出　　处：《石油与天然气地质》2011年第6期934-939,共6页Oil & Gas Geology

基　　金：中国石油天然气集团公司"九五"重点科技攻关项目(970211)

摘　　要：针对河道砂油藏连片性相对较差、面积相对较小、基础资料相对欠缺、油藏数值模拟方法难以有效应用的实际情况,从油藏自身的动态规律出发,确立了河道砂油藏注采指标的统计规律——累积产液量与时间的双对数直线规律和累积产液量、累积注水量与累积产油量的半对数直线规律。以此为基础推导出了累积产液量、月产油量、月注水量及月注采比与开发时间的关系。建立了一整套配产配注公式,可反映在稳定水驱阶段,累积产液量、月注水量及月注采比随时间的递增规律和月产油量随时间的递减规律。在老河口油田桩106-54砂体的应用表明,月产油量呈现出明显的逐月递减趋势,而日注水量和月注采比均呈现出逐月递增趋势,符合水驱砂岩油藏的开发规律。目前该配产配注结果已在现场应用,对老河口油田桩106-54砂体实际生产起到了有效的指导作用,目前该砂体生产态势平稳,开发效果较为理想。Channel sandstone reservoirs are generally poor in continuity and small in area. These features, in combination with the scarcity of basic data, make reservoir simulation difficult to work effectively. According to the dynamic regular patterns of the reservoirs, this paper puts forward statistic relationships between the injection and production index of channel sandstone reservoirs, including double logarithmic linear relationship between cumulative liquid production and time, semi-logarithmic linear relationship between cumulative water injection and the cumulative oil production. Based on the statistic relationships,we derive the relationship of the cumula- tive liquid production, monthly oil production, monthly water injection, monthly injection-production ratio with production time. Furthermore we set up a series of formulas for proration and injection allocation that can reveal the increasing of cumulative liquid production, monthly water injection and monthly injection-production ratio with time, and the decreasing of monthly oil production with time during stable waterflooding stage. The formula application in Zhuang 106-54 sandstone, Laohekou oilfield, indicates that the monthly oil production decrease ob- viously, whereas the daily water injection and monthly injection-production ratio increase monthly, a trend in ac- cordance with the regular pattern of water flooding sandstone reservoirs. The proration and injection allocation approach has been successfully applied in Zhuang 106-54 sandbody of Laohekou oilfield and has contributed sig- nificantly to the stabilization oil production.

关 键 词：开发规律 配产配注 河道砂油藏 桩106-54砂体 老河口油田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]